Form N-CSR VANGUARD CHESTER FUNDS For: Sep 30

UNITED STATES
SECURITIES AND EXCHANGE COMMISSION
Washington, D.C. 20549

FORM N-CSR

CERTIFIED SHAREHOLDER REPORT
OF
REGISTERED MANAGEMENT INVESTMENT COMPANIES

Investment Company Act file number: 811-04098

Name of Registrant: Vanguard Chester Funds

Address of Registrant:
P.O. Box 2600
Valley Forge, PA 19482

Name and address of agent for service:
Anne E. Robinson, Esquire
P.O. Box 876
Valley Forge, PA 19482

Registrant’s telephone number, including area code: (610) 669-1000

Date of fiscal year end: September 30

Date of reporting period: October 1, 2015 – September 30, 2016

Item 1: Reports to Shareholders

Annual Report | September 30, 2016

Vanguard PRIMECAP Fund

A new format, unwavering commitment

As you begin reading this report, you’ll notice that we’ve made some improvements to the opening sections—based on feedback from you, our clients.

Page 1 starts with a new ”Your Fund’s Performance at a Glance,” a concise, handy summary of how your fund performed during the period.

In the renamed ”Chairman’s Perspective,” Bill McNabb will focus on enduring principles and investment insights.

We’ve modified some tables, and eliminated some redundancy, but we haven’t removed any information.

At Vanguard, we’re always looking for better ways to communicate and to help you make sound investment decisions. Thank you for entrusting your assets to us.

Please note: The opinions expressed in this report are just that—informed opinions. They should not be considered promises or advice. Also, please keep in mind that the information and opinions cover the period through the date on the front of this report. Of course, the risks of investing in your fund are spelled out in the prospectus.

See the Glossary for definitions of investment terms used in this report.

About the cover: No matter what language you speak, Vanguard has one consistent message and set of principles. Our primary focus is on you, our clients. We conduct our business with integrity as a faithful steward of your assets. This message is shown translated into seven languages, reflecting our expanding global presence.

Your Fund’s Performance at a Glance

• Vanguard PRIMECAP Fund returned about 17% for the 12 months ended September 30, 2016, exceeding the benchmark Standard and Poor’s 500 Index return of about 15% and the nearly 9% average return of its multi-capitalization growth fund peers.

• Value stocks outpaced their growth counterparts for the period. All of PRIMECAP’s industry sectors posted gains, six of them double digits.

• PRIMECAP Management Company, the fund’s advisor, traditionally invests most heavily in the information technology and health care sectors. The fund’s technology stocks advanced more than 36%, well ahead of those in the benchmark, and contributed about 12 percentage points to results. Health care stocks returned 10% and added about 3 percentage points to results.

The figures shown represent past performance, which is not a guarantee of future results. (Current performance may be lower or higher than the performance data cited. For performance data current to the most recent month-end, visit our website at vanguard.com/performance.) Note, too, that both investment returns and principal value can fluctuate widely, so an investor’s shares, when sold, could be worth more or less than their original cost.

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The fund expense ratios shown are from the prospectus dated January 28, 2016, and represent estimated costs for the current fiscal year. For the fiscal year ended September 30, 2016, the fund’s expense ratios were 0.39% for Investor Shares and 0.33% for Admiral Shares. The peer-group expense ratio is derived from data provided by Lipper, a Thomson Reuters Company, and captures information through year-end 2015.

Peer group: Multi-Cap Growth Funds.

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Chairman’s Perspective

Bill McNabb
Chairman and Chief Executive Officer

Dear Shareholder,

If you think you’ve had reason to feel uneasy about the investment environment lately, you’re not imagining things. In just the past few months, we’ve seen economic uncertainty, intense political polarization, and super-low bond yields. Yet at the same time, the stock market kept pushing higher.

In this confusing and sometimes contradictory climate, you may be asking yourself a question that I hear often: How do I make sense of all this, keep investing, and still get a good night’s sleep?

As with any problem, there are multiple ways to go at it. But there’s one approach in particular that is simple, straightforward, and nearly foolproof: Save more money. Not only can saving more give you a greater sense of control over your investment plan, it can help compensate for long-term returns that, in our estimation, could fall short of historical averages.

I love the way one of our investment pros put it. Fran Kinniry this summer told The Wall Street Journal, “Investing is always a partnership between you and the markets.” He explained that the markets carried more than their fair share of the weight for a couple of decades, through the 1990s, providing outsized returns that made the investor’s half of the partnership relatively light work. “But now you are going to have to be the majority partner.”

Sobering? Sure. Hopeless? Definitely not.

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Over the 12 months since last September, U.S. stocks returned 15%, though the rise has not been a one-way ticket straight up. International markets have also posted strong returns, but lower than those of the broad U.S. market. The decision by United Kingdom voters in June to exit the European Union came as a surprise but caused market heartburn for only a few days.

In fixed income, yields remained extremely low—about 1.60% on the 10-year U.S. Treasury note at the end of September, after dipping below 1.40% over the summer. And bond yields in some international markets were negative.

Even this relatively small window of time illustrates a truism of the financial markets: There will always be segments that perform well and others that don’t. Saving more saves you from trying to control the uncontrollable—how economies and the markets perform. And it keeps you in control of one of the most vital parts of your investment program.

Although the “save more” logic is easy to grasp, it’s not always easy to follow. Bills, illness, the loss of a job—these can affect any of us.

But whatever our circumstances, figuring out how to save more is worth the effort. It requires that we make difficult decisions to forgo some consumption today to increase the likelihood of consuming (or consuming more) in the future. This is the very heart of investing. Sacrifices are never fun, so consider carrying them out systematically and in doses that you

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can be comfortable with—for instance, gradually getting up to the max in your IRA, or adding a percentage point or so to the amount you stash in your employer’s retirement plan. As a point of reference, we generally suggest that investors strive for a retirement savings rate of 12%–15%, including any employer contributions.

If you need more convincing about the wisdom of the “save more” course of action, it might be helpful to examine your alternatives. This list is by no means exhaustive, but it hits on a few of the big ones, and none are without risk.

• Reach for yield. With yields so low on many types of bonds, it’s tempting to find the corners of the fixed income market where payouts are juicier. But with the juice comes considerable risk. You need to be aware that you’d be taking on more risk—and how much more.

• Go all-in on a hot-performing asset class or fund. By now, you know better than that, right?

• Sit tight. This approach isn’t a terrible idea; it’s better than panicking and deciding to just “do something,” particularly if that means changing your approach in response to the market’s movements.

Here’s the inescapably challenging part of your partnership with the markets: In the short run, your “partner” is fickle, emotional, and wildly unpredictable. But in the long run, your partner is mostly rational and extremely helpful.

The best way to minimize your vulnerability to the market’s mood swings, and to maximize the benefit of your partner’s longer-term strengths, is to expect less and save more. Maybe the markets will deliver better-than-expected returns. Maybe they’ll be consistent with our more modest expectations. In either case, a higher savings rate can help put you in a better position to reach your goals.

As always, thank you for investing with Vanguard.

Sincerely,

F. William McNabb III
Chairman and Chief Executive Officer
October 18, 2016

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Advisor’s Report

For the fiscal year ended September 30, 2016, Vanguard PRIMECAP Fund returned 17.40% for Investor Shares and 17.48% for Admiral Shares. These exceeded both the 15.43% return of the fund’s benchmark, the unmanaged Standard & Poor’s 500 Index, and the 8.91% average return of its multi-capitalization growth fund competitors. The fund’s information technology portfolio was the most significant contributor to its absolute and relative results, returning 36%, compared with the 23% return of the S&P 500 Information Technology Index. The fund’s overweight position in health care detracted from relative returns, as did the poor relative performance of its industrial holdings, which returned 9%, compared with the 19% return of the S&P 500 Industrials Index. Financials were a bright spot for the fund thanks to the combined benefit of an underweight position (financials were the worst-performing sector over the period) and favorable stock selection.

The investment environment

The investment environment has been inhospitable for active managers recently, with the vast majority of large-cap growth stock funds underperforming their benchmarks in calendar year 2016. The dispersion of sector returns has been extreme, as have the pace and magnitude of changes in market leadership.

For example, during the first quarter, the best-performing sector in the S&P 500 Index, telecommunication services (+17%), returned nearly 22 percentage points more than the worst-performing sector, financial services (–5%). Telecommunication services (+25%) and utilities (+23%), which led the market for the first six months of the calendar year (compared with the 4% total return of the S&P 500 Index), were the worst-performing sectors during the third quarter, when each returned –6% (compared with the 4% total return of the S&P 500 Index). Conversely, information technology, which had a slightly negative total return in the first half of the year, far exceeded all other sectors during the third quarter, returning 12%.

Portfolio update

The portfolio remained heavily overweighted in information technology and health care stocks, which had a combined ending weight of 64%, compared with 36% in the S&P 500 Index. The portfolio’s most significant underweights were in consumer staples, energy, real estate, and utilities; those sectors’ combined ending weight was 2%, compared with 24% in the S&P 500 Index. The portfolio also was underweighted in consumer discretionary, financials, materials, and telecommunication services. Combined, they represented 18% of assets at the end of the period, compared with 31% in the S&P 500 Index.

In information technology, the fund is most overweighted in semiconductors and semiconductor equipment stocks (12% versus 3% for the S&P 500 Index) and software (11% versus 4% for the index). During the past fiscal year, semiconductors were the sector’s best-performing industry for both the fund (+48%) and the index (+39%), with the

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fund’s outperformance driven by Texas Instruments (+45%) and NVIDIA (+181%). The fund’s software holdings returned 31%, led by Adobe Systems (+32%) and Microsoft (+34%). The portfolio’s internet holdings returned 38%, led by Alibaba (+79%), and its hardware holdings returned +37%, primarily due to Hewlett Packard Enterprise (+59%) and HP Inc. (+30%). In communications equipment, the fund’s poor relative performance (+2%) was driven by Ericsson (–24%).

In health care, the fund is most overweighted in biotechnology and pharmaceutical stocks, whose 22% combined weighting was nearly triple their weighting in the S&P 500 Index. The portfolio’s biotech holdings returned 15%, exceeding the index return, thanks to Amgen (+24%) and Biogen (+7%). Biogen rebounded dramatically during the third quarter, returning 29%, in part on rumors that the company could be acquired. The fund’s pharmaceutical holdings returned –1%, below the index return, as Eli Lilly (–2%), Roche (–2%), and Novartis (–11%) underperformed.

The fund is also significantly overweighted in industrial stocks (16% versus 10% for the S&P 500 Index) notably, airlines (6% versus 1% for the index) and air freight & logistics companies (4% versus 1%). Airline stocks were the worst-performing group in industrials, and their –3% return accounted for most of the fund’s under-performance in that sector.

As of September 30, 2016, the fund’s top 10 holdings represented about 42% of assets.

Advisor perspectives

Our search for new investments often begins with research on out-of-favor companies and industries. Over the last several years, the information technology industry has been disrupted by cloud computing and the associated shift to subscription-based pricing models, the rise of smartphones and concomitant erosion of the personal computer market, and the advent of social networking. The industry has always been characterized by such disruptive innovations, which force incumbents to internally develop or acquire next-generation technologies in order to survive. Although such transitions carry significant risks, investors who focus solely on the threats posed by next-generation technologies often ignore the significant intellectual capital, established sales and distribution channels, and sizeable cash flows the “old technology” incumbents bring to bear.

Several years ago, Adobe and Microsoft were dismissed as “old technology” companies tied to legacy business models. Their software was delivered from locally deployed servers or personal computers and sold as perpetual licenses with annual maintenance contracts, whereas next-generation competitors delivered their software from the cloud and sold monthly subscriptions.

At the end of 2011, Adobe traded for $28 per share, or 11.5 times the 2012 estimated earnings per share (EPS) of $2.45, while at the end of 2012, Microsoft sold for $27 per share, or 8.8 times the 2013 estimated EPS of $3.04. In Adobe’s

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case, as it became clear that the company’s transition to a software-as-a-service (SaaS) model would be successful, investors overlooked the negative near-term financial impact of the transition and began to value the stock based on its long-term earnings potential. Adobe currently trades for $107, or 27.3 times the 2017 estimated EPS of $3.97. In Microsoft’s case, the transitioning of its existing software to a SaaS model was accompanied by the creation of entirely new cloud computing businesses, which gave investors confidence that the company would remain a valued partner to its business customers as they shifted their internal IT environments to the cloud. Microsoft currently sells for $57, or 18.7 times the 2017 estimated EPS of $3.06.

The portfolio contains a number of stocks of “old technology” companies, including Cisco (12.5 times the 2017 estimated EPS), Intel (13.3 times), Hewlett Packard Enterprise (10.6 times), HP Inc. (9.6 times), Micron (13.1 times), NetApp (13.2 times), Oracle (13.7 times), and Qualcomm (13.8 times). Each company faces unique challenges, but each possesses significant competitive advantages and has the potential to exceed the market’s modest expectations.

Outside of information technology, we remain enthusiastic about the fund’s airline holdings, whose extraordinarily low valuation multiples reflect a high degree of skepticism about their ability to sustain current profits. We are more sanguine about the outlook for airline industry profitability, as we believe industry supply and demand dynamics are favorable.

We also find many financials to be attractively valued, particularly large banks that are trading near book value and could benefit significantly from rising interest rates. Finally, we are excited by the prospects for our health care holdings, many of which are trading at or below the S&P 500 Index forward price/earnings multiple in spite of superior secular growth prospects. In the short term, however, we expect significant volatility in this area, as two of the fund’s largest holdings, Biogen and Eli Lilly, present data related to their respective Alzheimer’s drugs later this year.

Conclusion

As bottom-up stock pickers, we spend our time searching for stocks with long-term prospects we find to be materially better than market prices would seem to imply. Our approach often results in portfolios that bear little resemblance to market indices, creating the possibility for substantial deviations in relative performance. For example, our relative returns were significantly negative during the first half of calendar 2016, when the fund’s overweighted sectors and industries underperformed, and we expect to experience similar conditions in the future. We nonetheless believe that this approach can generate superior results for shareholders over the long term.

PRIMECAP Management Company

 October 18, 2016

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Sector Diversification (% of equity exposure)

These measures show the degree and timing of the fund’s fluctuations compared with the indexes over 36 months.

Ten Largest Holdings (% of total net assets)

The holdings listed exclude any temporary cash investments and equity index products.

Investment Focus

1 The expense ratios shown are from the prospectus dated January 28, 2016, and represent estimated costs for the current fiscal year. For the fiscal year ended September 30, 2016, the expense ratios were 0.39% for Investor Shares and 0.33% for Admiral Shares.

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PRIMECAP Fund

Performance Summary

All of the returns in this report represent past performance, which is not a guarantee of future results that may be achieved by the fund. (Current performance may be lower or higher than the performance data cited. For performance data current to the most recent month-end, visit our website at vanguard.com/performance.) Note, too, that both investment returns and principal value can fluctuate widely, so an investor’s shares, when sold, could be worth more or less than their original cost. The returns shown do not reflect taxes that a shareholder would pay on fund distributions or on the sale of fund shares.

Cumulative Performance: September 30, 2006, Through September 30, 2016
Initial Investment of $10,000

See Financial Highlights for dividend and capital gains information.

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PRIMECAP Fund

Fiscal-Year Total Returns (%): September 30, 2006, Through September 30, 2016

PRIMECAP Fund Investor Shares

S&P 500 Index

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PRIMECAP Fund

Financial Statements

Statement of Net Assets
As of September 30, 2016

The fund reports a complete list of its holdings in regulatory filings four times in each fiscal year, at the quarter-ends. For the second and fourth fiscal quarters, the lists appear in the fund’s semiannual and annual reports to shareholders. For the first and third fiscal quarters, the fund files the lists with the Securities and Exchange Commission on Form N-Q. Shareholders can look up the fund’s Forms N-Q on the SEC’s website at sec.gov. Forms N-Q may also be reviewed and copied at the SEC’s Public Reference Room (see the back cover of this report for further information).

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• See Note A in Notes to Financial Statements.
^ Includes partial security positions on loan to broker-dealers. The total value of securities on loan is $118,344,000.
* Non-income-producing security.
1 Considered an affiliated company of the fund as the fund owns more than 5% of the outstanding voting securities of such company.
2 Affiliated money market fund available only to Vanguard funds and certain trusts and accounts managed by Vanguard. Rate shown is
the 7-day yield.
3 Includes $123,264,000 of collateral received for securities on loan.
ADR—American Depositary Receipt.
See accompanying Notes, which are an integral part of the Financial Statements.

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See accompanying Notes, which are an integral part of the Financial Statements.

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1 Includes fiscal 2016 and 2015 short-term gain distributions totaling $0 and $17,373,000, respectively. Short-term gain distributions are treated as ordinary income dividends for tax purposes.

2 Net Assets—End of Period includes undistributed (overdistributed) net investment income of $425,507,000 and $333,810,000.

See accompanying Notes, which are an integral part of the Financial Statements.

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1 Total returns do not include transaction or account service fees that may have applied in the periods shown. Fund prospectuses provide information about any applicable transaction and account service fees.

See accompanying Notes, which are an integral part of the Financial Statements.

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1 Total returns do not include transaction or account service fees that may have applied in the periods shown. Fund prospectuses provide information about any applicable transaction and account service fees.

See accompanying Notes, which are an integral part of the Financial Statements.

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PRIMECAP Fund

Notes to Financial Statements

Vanguard PRIMECAP Fund is registered under the Investment Company Act of 1940 as an open-end investment company, or mutual fund. The fund offers two classes of shares: Investor Shares and Admiral Shares. Investor Shares are available to any investor who meets the fund’s minimum purchase requirements. Admiral Shares are designed for investors who meet certain administrative, service, and account-size criteria.

A. The following significant accounting policies conform to generally accepted accounting principles for U.S. investment companies. The fund consistently follows such policies in preparing its financial statements.

1. Security Valuation: Securities are valued as of the close of trading on the New York Stock Exchange (generally 4 p.m., Eastern time) on the valuation date. Equity securities are valued at the latest quoted sales prices or official closing prices taken from the primary market in which each security trades; such securities not traded on the valuation date are valued at the mean of the latest quoted bid and asked prices. Securities for which market quotations are not readily available, or whose values have been affected by events occurring before the fund’s pricing time but after the close of the securities’ primary markets, are valued at their fair values calculated according to procedures adopted by the board of trustees. These procedures include obtaining quotations from an independent pricing service, monitoring news to identify significant market- or security-specific events, and evaluating changes in the values of foreign market proxies (for example, ADRs, futures contracts, or exchange-traded funds), between the time the foreign markets close and the fund’s pricing time. When fair-value pricing is employed, the prices of securities used by a fund to calculate its net asset value may differ from quoted or published prices for the same securities. Investments in Vanguard Market Liquidity Fund are valued at that fund’s net asset value.

2. Foreign Currency: Securities and other assets and liabilities denominated in foreign currencies are translated into U.S. dollars using exchange rates obtained from an independent third party as of the fund’s pricing time on the valuation date. Realized gains (losses) and unrealized appreciation (depreciation) on investment securities include the effects of changes in exchange rates since the securities were purchased, combined with the effects of changes in security prices. Fluctuations in the value of other assets and liabilities resulting from changes in exchange rates are recorded as unrealized foreign currency gains (losses) until the assets or liabilities are settled in cash, at which time they are recorded as realized foreign currency gains (losses).

3. Federal Income Taxes: The fund intends to continue to qualify as a regulated investment company and distribute all of its taxable income. Management has analyzed the fund’s tax positions taken for all open federal income tax years (September 30, 2013–2016), and has concluded that no provision for federal income tax is required in the fund’s financial statements.

4. Distributions: Distributions to shareholders are recorded on the ex-dividend date.

5. Securities Lending: To earn additional income, the fund lends its securities to qualified institutional borrowers. Security loans are subject to termination by the fund at any time, and are required to be secured at all times by collateral in an amount at least equal to the market value of securities loaned. Daily market fluctuations could cause the value of loaned securities to be more or less than the value of the collateral received. When this occurs, the collateral is adjusted and settled on the next business

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PRIMECAP Fund

day. The fund further mitigates its counterparty risk by entering into securities lending transactions only with a diverse group of prequalified counterparties, monitoring their financial strength, and entering into master securities lending agreements with its counterparties. The master securities lending agreements provide that, in the event of a counterparty’s default (including bankruptcy), the fund may terminate any loans with that borrower, determine the net amount owed, and sell or retain the collateral up to the net amount owed to the fund; however, such actions may be subject to legal proceedings. While collateral mitigates counterparty risk, in the absence of a default the fund may experience delays and costs in recovering the securities loaned. The fund invests cash collateral received in Vanguard Market Liquidity Fund, and records a liability in the Statement of Net Assets for the return of the collateral, during the period the securities are on loan. Securities lending income represents fees charged to borrowers plus income earned on invested cash collateral, less expenses associated with the loan. During the term of the loan, the fund is entitled to all distributions made on or in respect of the loaned securities.

6. Credit Facility: The fund and certain other funds managed by The Vanguard Group (“Vanguard”) participate in a $3.1 billion committed credit facility provided by a syndicate of lenders pursuant to a credit agreement that may be renewed annually; each fund is individually liable for its borrowings, if any, under the credit facility. Borrowings may be utilized for temporary and emergency purposes, and are subject to the fund’s regulatory and contractual borrowing restrictions. The participating funds are charged administrative fees and an annual commitment fee of 0.10% of the undrawn amount of the facility; these fees are allocated to the funds based on a method approved by the fund’s board of trustees and included in Management and Administrative expenses on the fund’s Statement of Operations. Any borrowings under this facility bear interest at a rate based upon the higher of the one-month London Interbank Offered Rate, federal funds effective rate, or overnight bank funding rate plus an agreed-upon spread.

The fund had no borrowings outstanding at September 30, 2016, or at any time during the period then ended.

7. Other: Dividend income is recorded on the ex-dividend date. Interest income includes income distributions received from Vanguard Market Liquidity Fund and is accrued daily. Security transactions are accounted for on the date securities are bought or sold. Costs used to determine realized gains (losses) on the sale of investment securities are those of the specific securities sold.

Each class of shares has equal rights as to assets and earnings, except that each class separately bears certain class-specific expenses related to maintenance of shareholder accounts (included in Management and Administrative expenses) and shareholder reporting. Marketing and distribution expenses are allocated to each class of shares based on a method approved by the board of trustees. Income, other non-class-specific expenses, and gains and losses on investments are allocated to each class of shares based on its relative net assets.

B. PRIMECAP Management Company provides investment advisory services to the fund for a fee calculated at an annual percentage rate of average net assets. For the year ended September 30, 2016, the investment advisory fee represented an effective annual rate of 0.20% of the fund’s average net assets.

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PRIMECAP Fund

C. In accordance with the terms of a Funds’ Service Agreement (the “FSA”) between Vanguard and the fund, Vanguard furnishes to the fund corporate management, administrative, marketing, and distribution services at Vanguard’s cost of operations (as defined by the FSA). These costs of operations are allocated to the fund based on methods and guidelines approved by the board of trustees. Vanguard does not require reimbursement in the current period for certain costs of operations (such as deferred compensation/benefits and risk/insurance costs); the fund’s liability for these costs of operations is included in Payables to Vanguard on the Statement of Net Assets.

Upon the request of Vanguard, the fund may invest up to 0.40% of its net assets as capital in Vanguard. At September 30, 2016, the fund had contributed to Vanguard capital in the amount of $3,594,000, representing 0.01% of the fund’s net assets and 1.44% of Vanguard’s capitalization. The fund’s trustees and officers are also directors and employees, respectively, of Vanguard.

D. Various inputs may be used to determine the value of the fund’s investments. These inputs are summarized in three broad levels for financial statement purposes. The inputs or methodologies used to value securities are not necessarily an indication of the risk associated with investing in those securities.

Level 1—Quoted prices in active markets for identical securities.

Level 2—Other significant observable inputs (including quoted prices for similar securities, interest rates, prepayment speeds, credit risk, etc.).

Level 3—Significant unobservable inputs (including the fund’s own assumptions used to determine the fair value of investments).

The following table summarizes the market value of the fund’s investments as of September 30, 2016, based on the inputs used to value them:

E. Distributions are determined on a tax basis and may differ from net investment income and realized capital gains for financial reporting purposes. Differences may be permanent or temporary. Permanent differences are reclassified among capital accounts in the financial statements to reflect their tax character. Temporary differences arise when certain items of income, expense, gain, or loss are recognized in different periods for financial statement and tax purposes. These differences will reverse at some time in the future. Differences in classification may also result from the treatment of short-term gains as ordinary income for tax purposes.

During the year ended September 30, 2016, the fund realized net foreign currency losses of $395,000, which decreased distributable net income for tax purposes; accordingly, such losses have been reclassified from accumulated net realized gains to undistributed net investment income.

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PRIMECAP Fund

During the year ended September 30, 2016, the fund realized $309,406,000 of net capital gains resulting from in-kind redemptions—in which shareholders exchanged fund shares for securities held by the fund rather than for cash. Because such gains are not taxable to the fund, and are not distributed to shareholders, they have been reclassified from accumulated net realized gains to paid-in capital.

The fund used a tax accounting practice to treat a portion of the price of capital shares redeemed during the year as distributions from net investment income and realized capital gains. Accordingly, the fund has reclassified $36,669,000 from undistributed net investment income, and $110,050,000 from accumulated net realized gains, to paid-in capital.

For tax purposes, at September 30, 2016, the fund had $535,659,000 of ordinary income and $1,590,242,000 of long-term capital gains available for distribution.

At September 30, 2016, the cost of investment securities for tax purposes was $23,236,618,000. Net unrealized appreciation of investment securities for tax purposes was $24,385,773,000, consisting of unrealized gains of $25,258,483,000 on securities that had risen in value since their purchase and $872,710,000 in unrealized losses on securities that had fallen in value since their purchase.

F. During the year ended September 30, 2016, the fund purchased $2,798,500,000 of investment securities and sold $4,962,837,000 of investment securities, other than temporary cash investments. Purchases and sales include $0 and $1,004,080,000, respectively, in connection with in-kind purchases and redemptions of the fund’s capital shares.

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PRIMECAP Fund

H. Certain of the fund’s investments are in companies that are considered to be affiliated companies of the fund because the fund owns more than 5% of the outstanding voting securities of the company or the issuer is another member of The Vanguard Group. Transactions during the period in securities of these companies were as follows:

1 Includes net realized gain (loss) on affiliated investment securities sold of $14,204,000.

2 Not applicable—at September 30, 2016, the security was still held, but the issuer was no longer an affiliated company of the fund.

3 Not applicable—at September 30, 2015, the issuer was not an affiliated company of the fund.

4 Not applicable—purchases and sales are for temporary cash investment purposes.

I. Management has determined that no material events or transactions occurred subsequent to September 30, 2016, that would require recognition or disclosure in these financial statements.

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Report of Independent Registered Public Accounting Firm

To the Board of Trustees of Vanguard Chester Funds and the Shareholders of Vanguard PRIMECAP Fund:

In our opinion, the accompanying statement of net assets and the related statements of operations and of changes in net assets and the financial highlights present fairly, in all material respects, the financial position of Vanguard PRIMECAP Fund (constituting a separate portfolio of Vanguard Chester Funds, hereafter referred to as the “Fund”) at September 30, 2016, the results of its operations for the year then ended, the changes in its net assets for each of the two years in the period then ended, and the financial highlights for each of the five years in the period then ended, in conformity with accounting principles generally accepted in the United States of America. These financial statements and financial highlights (hereafter referred to as “financial statements”) are the responsibility of the Fund’s management. Our responsibility is to express an opinion on these financial statements based on our audits. We conducted our audits of these financial statements in accordance with the standards of the Public Company Accounting Oversight Board (United States). Those standards require that we plan and perform the audit to obtain reasonable assurance about whether the financial statements are free of material misstatement. An audit includes examining, on a test basis, evidence supporting the amounts and disclosures in the financial statements, assessing the accounting principles used and significant estimates made by management, and evaluating the overall financial statement presentation. We believe that our audits, which included confirmation of securities at September 30, 2016 by correspondence with the custodian and brokers and by agreement to the underlying ownership records of the transfer agent, provide a reasonable basis for our opinion.

/s/PricewaterhouseCoopers LLP
Philadelphia, Pennsylvania
November 10, 2016

Special 2016 tax information (unaudited) for Vanguard PRIMECAP Fund

This information for the fiscal year ended September 30, 2016, is included pursuant to provisions of the Internal Revenue Code.

The fund distributed $2,186,536,000 as capital gain dividends (20% rate gain distributions) to shareholders during the fiscal year.

The fund distributed $513,078,000 of qualified dividend income to shareholders during the fiscal year.

For corporate shareholders, 91.1% of investment income (dividend income plus short-term gains, if any) qualifies for the dividends-received deduction.

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Your Fund’s After-Tax Returns

This table presents returns for your fund both before and after taxes. The after-tax returns are shown in two ways: (1) assuming that an investor owned the fund during the entire period and paid taxes on the fund’s distributions, and (2) assuming that an investor paid taxes on the fund’s distributions and sold all shares at the end of each period.

Calculations are based on the highest individual federal income tax and capital gains tax rates in effect at the times of the distributions and the hypothetical sales. State and local taxes were not considered. After-tax returns reflect any qualified dividend income, using actual prior-year figures and estimates for 2016. (In the example, returns after the sale of fund shares may be higher than those assuming no sale. This occurs when the sale would have produced a capital loss. The calculation assumes that the investor received a tax deduction for the loss.)

The table shows returns for Investor Shares only; returns for other share classes will differ. Please note that your actual after-tax returns will depend on your tax situation and may differ from those shown. Also note that if you own the fund in a tax-deferred account, such as an individual retirement account or a 401(k) plan, this information does not apply to you. Such accounts are not subject to current taxes.

Finally, keep in mind that a fund’s performance—whether before or after taxes—does not guarantee future results.

Average Annual Total Returns: PRIMECAP Fund Investor Shares

Periods Ended September 30, 2016

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About Your Fund’s Expenses

As a shareholder of the fund, you incur ongoing costs, which include costs for portfolio management, administrative services, and shareholder reports (like this one), among others. Operating expenses, which are deducted from a fund’s gross income, directly reduce the investment return of the fund.

A fund’s expenses are expressed as a percentage of its average net assets. This figure is known as the expense ratio. The following examples are intended to help you understand the ongoing costs (in dollars) of investing in your fund and to compare these costs with those of other mutual funds. The examples are based on an investment of $1,000 made at the beginning of the period shown and held for the entire period.

The accompanying table illustrates your fund’s costs in two ways:

• Based on actual fund return. This section helps you to estimate the actual expenses that you paid over the period. The ”Ending Account Value“ shown is derived from the fund‘s actual return, and the third column shows the dollar amount that would have been paid by an investor who started with $1,000 in the fund. You may use the information here, together with the amount you invested, to estimate the expenses that you paid over the period.

To do so, simply divide your account value by $1,000 (for example, an $8,600 account value divided by $1,000 = 8.6), then multiply the result by the number given for your fund under the heading ”Expenses Paid During Period.“

• Based on hypothetical 5% yearly return. This section is intended to help you compare your fund‘s costs with those of other mutual funds. It assumes that the fund had a yearly return of 5% before expenses, but that the expense ratio is unchanged. In this case—because the return used is not the fund’s actual return—the results do not apply to your investment. The example is useful in making comparisons because the Securities and Exchange Commission requires all mutual funds to calculate expenses based on a 5% return. You can assess your fund’s costs by comparing this hypothetical example with the hypothetical examples that appear in shareholder reports of other funds.

Note that the expenses shown in the table are meant to highlight and help you compare ongoing costs only and do not reflect transaction costs incurred by the fund for buying and selling securities. Further, the expenses do not include any purchase, redemption, or account service fees described in the fund prospectus. If such fees were applied to your account, your costs would be higher. Your fund does not carry a “sales load.”

The calculations assume no shares were bought or sold during the period. Your actual costs may have been higher or lower, depending on the amount of your investment and the timing of any purchases or redemptions.

You can find more information about the fund’s expenses, including annual expense ratios, in the Financial Statements section of this report. For additional information on operating expenses and other shareholder costs, please refer to your fund’s current prospectus.

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The calculations are based on expenses incurred in the most recent six-month period. The fund’s annualized six-month expense ratios for that period are 0.40% for Investor Shares and 0.34% for Admiral Shares. The dollar amounts shown as “Expenses Paid” are equal to the annualized expense ratio multiplied by the average account value over the period, multiplied by the number of days in the most recent six-month period, then divided by the number of days in the most recent 12-month period (183/366).

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Trustees Approve Advisory Arrangement

The board of trustees of Vanguard PRIMECAP Fund has renewed the fund’s investment advisory arrangement with PRIMECAP Management Company (PRIMECAP). The board determined that renewing the fund’s advisory arrangement was in the best interests of the fund and its shareholders.

The board based its decision upon an evaluation of the advisor’s investment staff, portfolio management process, and performance. This evaluation included information provided to the board by Vanguard’s Portfolio Review Department, which is responsible for fund and advisory oversight and product management. The Portfolio Review Department met regularly with the advisors and made monthly presentations to the board during the fiscal year directing the board’s focus to relevant information and topics.

The board, or an investment committee made up of board members, also received information throughout the year during advisor presentations. For each advisor presentation, the board was provided with letters and reports that included information about, among other things, the advisory firm and the advisor’s assessment of the investment environment, portfolio performance, and portfolio characteristics.

In addition, the board received monthly reports, which included a Market and Economic Report, a Fund Dashboard Monthly Summary, and a Fund Performance Report.

Prior to their meeting, the trustees were provided with a memo and material that summarized the information they received over the course of the year. They also considered the factors discussed below, among others. However, no single factor determined whether the board approved the arrangement. Rather, it was the totality of the circumstances that drove the board’s decision.

Nature, extent, and quality of services

The board reviewed the quality of the fund’s investment management services over both the short and long term, and took into account the organizational depth and stability of the advisor. The board considered that PRIMECAP, founded in 1983, is recognized for its long-term approach to growth equity investing. Five experienced portfolio managers are responsible for separate subportfolios, and each portfolio manager employs a fundamental, research-driven approach in seeking to identify companies with long-term growth potential that the market has yet to appreciate. The multi-counselor approach employed by PRIMECAP is designed to emphasize individual decision-making and enable the portfolio managers to invest in their highest-conviction ideas. The firm’s fundamental research focuses on developing opinions independent from Wall Street’s consensus and maintaining a long-term horizon. PRIMECAP has managed the fund since its inception in 1984.

The board concluded that the advisor’s experience, stability, depth, and performance, among other factors, warranted continuation of the advisory arrangement.

Investment performance

The board considered the short- and long-term performance of the fund, including any periods of outperformance or underperformance compared with a relevant benchmark index and peer group. The board concluded that the performance was such that the advisory arrangement should continue. Information about the fund’s most recent performance can be found in the Performance Summary section of this report.

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Cost

The board concluded that the fund’s expense ratio was well below the average expense ratio charged by funds in its peer group and that the fund’s advisory fee rate was also well below its peer-group average. Information about the fund’s expenses appears in the About Your Fund’s Expenses section of this report as well as in the Financial Statements section, which also includes information about the fund’s advisory fee rate.

The board did not consider profitability of PRIMECAP in determining whether to approve the advisory fee, because PRIMECAP is independent of Vanguard and the advisory fee is the result of arm’s-length negotiations.

The benefit of economies of scale

The board concluded that the fund’s shareholders benefit from economies of scale because of breakpoints in the advisory fee schedule. The breakpoints reduce the effective rate of the fee as the fund’s assets increase.

The board will consider whether to renew the advisory arrangement again after a one-year period.

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Glossary

30-Day SEC Yield. A fund’s 30-day SEC yield is derived using a formula specified by the U.S. Securities and Exchange Commission. Under the formula, data related to the fund’s security holdings in the previous 30 days are used to calculate the fund’s hypothetical net income for that period, which is then annualized and divided by the fund’s estimated average net assets over the calculation period. For the purposes of this calculation, a security’s income is based on its current market yield to maturity (for bonds), its actual income (for asset-backed securities), or its projected dividend yield (for stocks). Because the SEC yield represents hypothetical annualized income, it will differ—at times significantly—from the fund’s actual experience. As a result, the fund’s income distributions may be higher or lower than implied by the SEC yield.

Beta. A measure of the magnitude of a fund’s past share-price fluctuations in relation to the ups and downs of a given market index. The index is assigned a beta of 1.00. Compared with a given index, a fund with a beta of 1.20 typically would have seen its share price rise or fall by 12% when the index rose or fell by 10%. For this report, beta is based on returns over the past 36 months for both the fund and the index. Note that a fund’s beta should be reviewed in conjunction with its R-squared (see definition). The lower the R-squared, the less correlation there is between the fund and the index, and the less reliable beta is as an indicator of volatility.

Dividend Yield. Dividend income earned by stocks, expressed as a percentage of the aggregate market value (or of net asset value, for a fund). The yield is determined by dividing the amount of the annual dividends by the aggregate value (or net asset value) at the end of the period. For a fund, the dividend yield is based solely on stock holdings and does not include any income produced by other investments.

Earnings Growth Rate. The average annual rate of growth in earnings over the past five years for the stocks now in a fund.

Equity Exposure. A measure that reflects a fund’s investments in stocks and stock futures. Any holdings in short-term reserves are excluded.

Expense Ratio. A fund’s total annual operating expenses expressed as a percentage of the fund’s average net assets. The expense ratio includes management and administrative expenses, but does not include the transaction costs of buying and selling portfolio securities.

Foreign Holdings. The percentage of a fund represented by securities or depositary receipts of companies based outside the United States.

Inception Date. The date on which the assets of a fund (or one of its share classes) are first invested in accordance with the fund’s investment objective. For funds with a subscription period, the inception date is the day after that period ends. Investment performance is measured from the inception date.

Median Market Cap. An indicator of the size of companies in which a fund invests; the midpoint of market capitalization (market price x shares outstanding) of a fund’s stocks, weighted by the proportion of the fund’s assets invested in each stock. Stocks representing half of the fund’s assets have market capitalizations above the median, and the rest are below it.

Price/Book Ratio. The share price of a stock divided by its net worth, or book value, per share. For a fund, the weighted average price/book ratio of the stocks it holds.

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Price/Earnings Ratio. The ratio of a stock’s current price to its per-share earnings over the past year. For a fund, the weighted average P/E of the stocks it holds. P/E is an indicator of market expectations about corporate prospects; the higher the P/E, the greater the expectations for a company’s future growth.

R-Squared. A measure of how much of a fund’s past returns can be explained by the returns from the market in general, as measured by a given index. If a fund’s total returns were precisely synchronized with an index’s returns, its R-squared would be 1.00. If the fund’s returns bore no relationship to the index’s returns, its R-squared would be 0. For this report, R-squared is based on returns over the past 36 months for both the fund and the index.

Return on Equity. The annual average rate of return generated by a company during the past five years for each dollar of shareholder’s equity (net income divided by shareholder’s equity). For a fund, the weighted average return on equity for the companies whose stocks it holds.

Short-Term Reserves. The percentage of a fund invested in highly liquid, short-term securities that can be readily converted to cash.

Turnover Rate. An indication of the fund’s trading activity. Funds with high turnover rates incur higher transaction costs and may be more likely to distribute capital gains (which may be taxable to investors). The turnover rate excludes in-kind transactions, which have minimal impact on costs.

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The People Who Govern Your Fund

The trustees of your mutual fund are there to see that the fund is operated and managed in your best interests since, as a shareholder, you are a part owner of the fund. Your fund’s trustees also serve on the board of directors of The Vanguard Group, Inc., which is owned by the Vanguard funds and provides services to them on an at-cost basis.

A majority of Vanguard’s board members are independent, meaning that they have no affiliation with Vanguard or the funds they oversee, apart from the sizable personal investments they have made as private individuals. The independent board members have distinguished backgrounds in business, academia, and public service. Each of the trustees and executive officers oversees 198 Vanguard funds.

The following table provides information for each trustee and executive officer of the fund. The mailing address of the trustees and officers is P.O. Box 876, Valley Forge, PA 19482. More information about the trustees is in the Statement of Additional Information, which can be obtained, without charge, by contacting Vanguard at 800-662-7447, or online at vanguard.com.

InterestedTrustee¹

F. William McNabb III

Born 1957. Trustee Since July 2009. Chairman of the Board. Principal Occupation(s) During the Past Five Years and Other Experience: Chairman of the Board of The Vanguard Group, Inc., and of each of the investment companies served by The Vanguard Group, since January 2010; Director of The Vanguard Group since 2008; Chief Executive Officer and President of The Vanguard Group, and of each of the investment companies served by The Vanguard Group, since 2008; Director of Vanguard Marketing Corporation; Managing Director of The Vanguard Group (1995–2008).

IndependentTrustees

Emerson U. Fullwood

Born 1948. Trustee Since January 2008. Principal Occupation(s) During the Past Five Years and Other Experience: Executive Chief Staff and Marketing Officer for North America and Corporate Vice President (retired 2008) of Xerox Corporation (document management products and services); Executive in Residence and 2009–2010 Distinguished Minett Professor at the Rochester Institute of Technology; Lead Director of SPX FLOW, Inc. (multi-industry manufacturing); Director of the United Way of Rochester, the University of Rochester Medical Center, Monroe Community College Foundation, North Carolina A&T University, and Roberts Wesleyan College.

Rajiv L. Gupta

Born 1945. Trustee Since December 2001.² Principal Occupation(s) During the Past Five Years and Other Experience: Chairman and Chief Executive Officer (retired 2009) and President (2006–2008) of Rohm and Haas Co. (chemicals); Director of Tyco International plc (diversified manufacturing and services), HP Inc. (printer and personal computer manufacturing), and Delphi Automotive plc (automotive components); Senior Advisor at New Mountain Capital.

Amy Gutmann

Born 1949. Trustee Since June 2006. Principal Occupation(s) During the Past Five Years and Other Experience: President of the University of Pennsylvania; Christopher H. Browne Distinguished Professor of Political Science, School of Arts and Sciences, and Professor of Communication, Annenberg School for Communication, with secondary faculty appointments in the Department of Philosophy, School of Arts and Sciences, and at the Graduate School of Education, University of Pennsylvania; Trustee of the National Constitution Center; Chair of the Presidential Commission for the Study of Bioethical Issues.

JoAnn Heffernan Heisen

Born 1950. Trustee Since July 1998. Principal Occupation(s) During the Past Five Years and Other Experience: Corporate Vice President and Chief Global Diversity Officer (retired 2008) and Member of the Executive Committee (1997–2008) of Johnson & Johnson (pharmaceuticals/medical devices/consumer products); Director of Skytop Lodge Corporation (hotels) and the Robert Wood Johnson Foundation; Member of the Advisory Board of the Institute for Women’s Leadership at Rutgers University.

F. Joseph Loughrey

Born 1949. Trustee Since October 2009. Principal Occupation(s) During the Past Five Years and Other Experience: President and Chief Operating Officer (retired 2009) of Cummins Inc. (industrial machinery); Chairman of the Board of Hillenbrand, Inc. (specialized consumer services), and of Oxfam America; Director of SKF AB (industrial machinery), Hyster-Yale Materials Handling, Inc. (forklift trucks), the Lumina Foundation for Education, and the V Foundation for Cancer Research; Member of the Advisory Council for the College of Arts and Letters and of the Advisory Board to the Kellogg Institute for International Studies, both at the University of Notre Dame.

Mark Loughridge

Born 1953. Trustee Since March 2012. Principal Occupation(s) During the Past Five Years and Other Experience: Senior Vice President and Chief Financial Officer (retired 2013) at IBM (information technology services); Fiduciary Member of IBM’s Retirement Plan Committee (2004–2013); Director of the Dow Chemical Company; Member of the Council on Chicago Booth.

Scott C. Malpass

Born 1962. Trustee Since March 2012. Principal Occupation(s) During the Past Five Years and Other Experience: Chief Investment Officer and Vice President at the University of Notre Dame; Assistant Professor of Finance at the Mendoza College of Business at Notre Dame; Member of the Notre Dame 403(b) Investment Committee, the Board of Advisors for Spruceview Capital Partners, and the Investment Advisory Committee of Major League Baseball; Board Member of TIFF Advisory Services, Inc., and Catholic Investment Services, Inc. (investment advisors).

André F. Perold

Born 1952. Trustee Since December 2004. Principal Occupation(s) During the Past Five Years and Other Experience: George Gund Professor of Finance and Banking, Emeritus at the Harvard Business School (retired 2011); Chief Investment Officer and Managing Partner of HighVista Strategies LLC (private investment firm); Director of Rand Merchant Bank; Overseer of the Museum of Fine Arts Boston.

Peter F. Volanakis

Born 1955. Trustee Since July 2009. Principal Occupation(s) During the Past Five Years and Other Experience: President and Chief Operating Officer (retired 2010) of Corning Incorporated (communications equipment); Chairman of the Board of Trustees of Colby-Sawyer College; Member of the Advisory Board of the Norris Cotton Cancer Center.

Executive Officers

Glenn Booraem

Born 1967. Treasurer Since May 2015. Principal Occupation(s) During the Past Five Years and Other Experience: Principal of The Vanguard Group, Inc.; Treasurer of each of the investment companies served by The Vanguard Group; Controller of each of the investment companies served by The Vanguard Group (2010–2015); Assistant Controller of each of the investment companies served by The Vanguard Group (2001–2010).

Thomas J. Higgins

Born 1957. Chief Financial Officer Since September 2008. Principal Occupation(s) During the Past Five Years and Other Experience: Principal of The Vanguard Group, Inc.; Chief Financial Officer of each of the investment companies served by The Vanguard Group; Treasurer of each of the investment companies served by The Vanguard Group (1998–2008).

Peter Mahoney

Born 1974. Controller Since May 2015. Principal Occupation(s) During the Past Five Years and Other Experience: Head of Global Fund Accounting at The Vanguard Group, Inc.; Controller of each of the investment companies served by The Vanguard Group; Head of International Fund Services at The Vanguard Group (2008–2014).

Anne E. Robinson

Born 1970. Secretary Since September 2016. Principal Occupation(s) During the Past Five Years and Other Experience: Managing Director of The Vanguard Group, Inc.; General Counsel of The Vanguard Group; Secretary of The Vanguard Group and of each of the investment companies served by The Vanguard Group; Director and Senior Vice President of Vanguard Marketing Corporation; Managing Director and General Counsel of Global Cards and Consumer Services at Citigroup (2014–2016); Counsel at American Express (2003–2014).

Vanguard Senior Management Team

Chairman Emeritus and Senior Advisor John J. Brennan

Chairman, 1996–2009

Chief Executive Officer and President, 1996–2008

Founder

John C. Bogle
Chairman and Chief Executive Officer, 1974–1996

1 Mr. McNabb is considered an “interested person,” as defined in the Investment Company Act of 1940, because he is an officer of the Vanguard funds.

2 December 2002 for Vanguard Equity Income Fund, the Vanguard Municipal Bond Funds, and the Vanguard State Tax-Exempt Funds.

P.O. Box 2600

Valley Forge, PA 19482-2600

Connect with Vanguard® > vanguard.com

Annual Report | September 30, 2016

Vanguard Target Retirement Funds

Vanguard Target Retirement Income Fund

Vanguard Target Retirement 2010 Fund

Vanguard Target Retirement 2015 Fund

Vanguard Target Retirement 2020 Fund

Vanguard Target Retirement 2025 Fund

Vanguard Target Retirement 2030 Fund

A new format, unwavering commitment

As you begin reading this report, you’ll notice that we’ve made some improvements to the opening sections—based on feedback from you, our clients.

Page 1 starts with a new ”Your Fund’s Performance at a Glance,” a concise, handy summary of how your fund performed during the period.

In the renamed ”Chairman’s Perspective,” Bill McNabb will focus on enduring principles and investment insights.

We’ve modified some tables, and eliminated some redundancy, but we haven’t removed any information.

At Vanguard, we’re always looking for better ways to communicate and to help you make sound investment decisions. Thank you for entrusting your assets to us.

Please note: The opinions expressed in this report are just that—informed opinions. They should not be considered promises or advice. Also, please keep in mind that the information and opinions cover the period through the date on the front of this report. Of course, the risks of investing in your fund are spelled out in the prospectus.

See the Glossary for definitions of investment terms used in this report.

About the cover: No matter what language you speak, Vanguard has one consistent message and set of principles. Our primary focus is on you, our clients. We conduct our business with integrity as a faithful steward of your assets. This message is shown translated into seven languages, reflecting our expanding global presence.

Your Fund’s Performance at a Glance

• For the 12 months ended September 30, 2016 domestic and international stock markets made strong gains, returning about 15% and about 9%, respectively.

• Global fixed income markets also turned in solid results. U.S. bonds returned about 5%; international bonds returned about 8% for U.S.-based investors.

• Against this backdrop, the six Vanguard Target Retirement Funds covered in this report produced returns ranging from 7.54% for the Target Retirement Income Fund to 11.15% for the Target Retirement 2030 Fund. (The funds with retirement dates of 2035 through 2060 are covered in a separate report.) The funds with a greater allocation to stocks performed best.

• Each fund posted returns that were in line with those of its composite benchmark after expenses. Five surpassed the average return of their peers.

• For the ten years ended September 30, the funds’ average annual returns ranged from 5.21% for the Target Retirement 2010 Fund to 5.65% for the Target Retirement 2025 fund.

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Investments in Target Retirement Funds are subject to the risks of their underlying funds. The year in the fund name refers to the approximate year (the target date) when an investor in the fund would retire and leave the work force. The fund will gradually shift its emphasis from more aggressive investments to more conservative ones based on its target date. An investment in a Target Retirement Fund is not guaranteed at any time, including on or after the target date.

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For a benchmark description, see the Glossary.

The figures shown represent past performance, which is not a guarantee of future results. (Current performance may be lower or higher than the performance data cited. For performance data current to the most recent month-end, visit our website at vanguard.com/performance.) Note, too, that both investment returns and principal value can fluctuate widely, so an investor’s shares, when sold, could be worth more or less than their original cost.

The fund expense figures shown—drawn from the prospectus dated January 28, 2016—represent an estimate of the weighted average of the expense ratios and any transaction fees charged by the underlying mutual funds (the ”acquired” funds) in which the Target Retirement Funds invest. The Target Retirement Funds do not charge any expenses or fees of their own. For the fiscal year ended September 30, 2016, the acquired fund fees and expenses were 0.13% for the Income Fund, 0.13% for the 2010 Fund, 0.14% for the 2015 Fund, 0.14% for the 2020 Fund, 0.14% for the 2025 Fund, and 0.15% for the 2030 Fund. Peer-group expense ratios are derived from data provided by Lipper, a Thomson Reuters Company, and capture information through year-end 2015.

Peer groups: For the Income Fund, Mixed-Asset Target Today Funds Average; for the 2010 Fund, Mixed-Asset Target 2010 Funds; for the 2015 Fund, Mixed-Asset Target 2015 Funds; for the 2020 Fund, Mixed-Asset Target 2020 Funds; for the 2025 Fund, Mixed-Asset Target 2025 Funds; and for the Target Retirement 2030 Fund, Mixed-Asset Target 2030 Funds.

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Chairman’s Perspective

Bill McNabb
Chairman and Chief Executive Officer

Dear Shareholder,

If you think you’ve had reason to feel uneasy about the investment environment lately, you’re not imagining things. In just the past few months, we’ve seen economic uncertainty, intense political polarization, and super-low bond yields. Yet at the same time, the stock market kept pushing higher.

In this confusing and sometimes contradictory climate, you may be asking yourself a question that I hear often: How do I make sense of all this, keep investing, and still get a good night’s sleep?

As with any problem, there are multiple ways to go at it. But there’s one approach in particular that is simple, straightforward, and nearly foolproof: Save more money. Not only can saving more give you a greater sense of control over your investment plan, it can help compensate for long-term returns that, in our estimation, could fall short of historical averages.

I love the way one of our investment pros put it. Fran Kinniry this summer told The Wall Street Journal, “Investing is always a partnership between you and the markets.” He explained that the markets carried more than their fair share of the weight for a couple of decades, through the 1990s, providing outsized returns that made the investor’s half of the partnership relatively light work. “But now you are going to have to be the majority partner.”

Sobering? Sure. Hopeless? Definitely not.

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Over the 12 months since last September, U.S. stocks returned 15%, though the rise has not been a one-way ticket straight up. International markets have also posted strong returns, but lower than those of the broad U.S. market. The decision by United Kingdom voters in June to exit the European Union came as a surprise but caused market heartburn for only a few days.

In fixed income, yields remained extremely low—about 1.60% on the 10-year U.S. Treasury note at the end of September, after dipping below 1.40% over the summer. And bond yields in some international markets were negative.

Even this relatively small window of time illustrates a truism of the financial markets: There will always be segments that perform well and others that don’t. Saving more saves you from trying to control the uncontrollable—how economies and the markets perform. And it keeps you in control of one of the most vital parts of your investment program.

Although the “save more” logic is easy to grasp, it’s not always easy to follow. Bills, illness, the loss of a job—these can affect any of us.

But whatever our circumstances, figuring out how to save more is worth the effort. It requires that we make difficult decisions to forgo some consumption today to increase the likelihood of consuming (or consuming more) in the future. This is the very heart of investing. Sacrifices are never fun, so consider carrying them out systematically and in doses that you

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can be comfortable with—for instance, gradually getting up to the max in your IRA, or adding a percentage point or so to the amount you stash in your employer’s retirement plan. As a point of reference, we generally suggest that investors strive for a retirement savings rate of 12%–15%, including any employer contributions.

If you need more convincing about the wisdom of the “save more” course of action, it might be helpful to examine your alternatives. This list is by no means exhaustive, but it hits on a few of the big ones, and none are without risk.

• Reach for yield. With yields so low on many types of bonds, it’s tempting to find the corners of the fixed income market where payouts are juicier. But with the juice comes considerable risk. You need to be aware that you’d be taking on more risk—and how much more.

• Go all-in on a hot-performing asset class or fund. By now, you know better than that, right?

• Sit tight. This approach isn’t a terrible idea; it’s better than panicking and deciding to just “do something,” particularly if that means changing your approach in response to the market’s movements.

Here’s the inescapably challenging part of your partnership with the markets: In the short run, your “partner” is fickle, emotional, and wildly unpredictable. But in the long run, your partner is mostly rational and extremely helpful.

The best way to minimize your vulnerability to the market’s mood swings, and to maximize the benefit of your partner’s longer-term strengths, is to expect less and save more. Maybe the markets will deliver better-than-expected returns. Maybe they’ll be consistent with our more modest expectations. In either case, a higher savings rate can help put you in a better position to reach your goals.

As always, thank you for investing with Vanguard.

Sincerely,

F. William McNabb III
Chairman and Chief Executive Officer
October 18, 2016

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Target Retirement Income Fund

These measures show the degree and timing of the fund’s fluctuations compared with the indexes over 36 months.

Fund Asset Allocation

1 This figure—drawn from the prospectus dated January 28, 2016—represents an estimate of the weighted average of the expense ratios and any transaction fees charged by the underlying mutual funds (the ”acquired” funds) in which the Target Retirement Income Fund invests. The fund does not charge any expenses or fees of its own. For the fiscal year ended September 30, 2016, the acquired fund fees and expenses were 0.13%.

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Target Retirement Income Fund

Performance Summary

All of the returns in this report represent past performance, which is not a guarantee of future results that may be achieved by the fund. (Current performance may be lower or higher than the performance data cited. For performance data current to the most recent month-end, visit our website at vanguard.com/performance.) Note, too, that both investment returns and principal value can fluctuate widely, so an investor’s shares, when sold, could be worth more or less than their original cost. The returns shown do not reflect taxes that a shareholder would pay on fund distributions or on the sale of fund shares.

Cumulative Performance: September 30, 2006, Through September 30, 2016
Initial Investment of $10,000

For a benchmark description, see the Glossary.

Spliced Mixed-Asset Target Today Funds Average: Derived from data provided by Lipper, a Thomson Reuters Company.

See Financial Highlights for dividend and capital gains information.

8

Target Retirement Income Fund

Fiscal-Year Total Returns (%): September 30, 2006, Through September 30, 2016

9

Target Retirement Income Fund

Financial Statements

Statement of Net Assets
As of September 30, 2016

The fund reports a complete list of its holdings in regulatory filings four times in each fiscal year, at the quarter-ends. For the second and fourth fiscal quarters, the lists appear in the fund’s semiannual and annual reports to shareholders. For the first and third fiscal quarters, the fund files the lists with the Securities and Exchange Commission on Form N-Q. Shareholders can look up the fund’s Forms N-Q on the SEC’s website at sec.gov. Forms N-Q may also be reviewed and copied at the SEC’s Public Reference Room (see the back cover of this report for further information).

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• See Note A in Notes to Financial Statements.

1 Affiliated fund available only to Vanguard funds and certain trusts and accounts managed by Vanguard. Rate shown for Vanguard Market Liquidity Fund is the 7-day yield.

See accompanying Notes, which are an integral part of the Financial Statements.

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See accompanying Notes, which are an integral part of the Financial Statements.

12

1 Includes fiscal 2016 and 2015 short-term gain distributions totaling $8,126,000 and $14,025,000, respectively. Short-term gain distributions are treated as ordinary income dividends for tax purposes.

2 Net Assets—End of Period includes undistributed (overdistributed) net investment income of $9,513,000 and $8,168,000.

See accompanying Notes, which are an integral part of the Financial Statements.

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1 Total returns do not include account service fees that may have applied in the periods shown. Fund prospectuses provide information about any applicable account service fees.

See accompanying Notes, which are an integral part of the Financial Statements.

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Target Retirement Income Fund

Notes to Financial Statements

Vanguard Target Retirement Income Fund is registered under the Investment Company Act of 1940 as an open-end investment company, or mutual fund. The fund follows a balanced investment strategy by investing in selected Vanguard funds to achieve its targeted allocation of assets to U.S. and international stocks, and U.S. and international bonds. Financial statements and other information about each underlying fund are available on vanguard.com.

A. The following significant accounting policies conform to generally accepted accounting principles for U.S. investment companies. The fund consistently follows such policies in preparing its financial statements.

1. Security Valuation: Investments are valued at the net asset value of each underlying Vanguard fund determined as of the close of the New York Stock Exchange (generally 4 p.m., Eastern time) on the valuation date.

2. Federal Income Taxes: The fund intends to continue to qualify as a regulated investment company and distribute all of its taxable income. Management has analyzed the fund’s tax positions taken for all open federal income tax years (September 30, 2013–2016), and has concluded that no provision for federal income tax is required in the fund’s financial statements.

3. Distributions: Distributions to shareholders are recorded on the ex-dividend date.

4. Credit Facility: The fund and certain other funds managed by The Vanguard Group (“Vanguard”) participate in a $3.1 billion committed credit facility provided by a syndicate of lenders pursuant to a credit agreement that may be renewed annually; each fund is individually liable for its borrowings, if any, under the credit facility. Borrowings may be utilized for temporary and emergency purposes, and are subject to the fund’s regulatory and contractual borrowing restrictions. The participating funds are charged administrative fees and an annual commitment fee of 0.10% of the undrawn amount of the facility; these fees are allocated to the funds based on a method approved by the fund’s board of trustees and borne by the funds in which the fund invests (see Note B). Any borrowings under this facility bear interest at a rate based upon the higher of the one-month London Interbank Offered Rate, federal funds effective rate, or overnight bank funding rate plus an agreed-upon spread.

The fund had no borrowings outstanding at September 30, 2016, or at any time during the period then ended.

5. Other: Income and capital gain distributions received are recorded on the ex-dividend date. Security transactions are accounted for on the date securities are bought or sold. Costs used to determine realized gains (losses) on the sale of investment securities are those of the specific securities sold.

B. In accordance with the terms of a Funds’ Service Agreement (the “FSA”) between Vanguard and the fund, Vanguard furnishes to the fund investment advisory, corporate management, administrative, marketing, and distribution services at Vanguard’s cost of operations (as defined by the FSA). These costs of operations are allocated to the fund based on methods and guidelines approved by the board of trustees. The FSA provides that expenses otherwise allocable to Vanguard funds-of-funds may be reduced or eliminated to the extent of savings realized by the underlying Vanguard funds by virtue of being part of a fund-of-funds. Accordingly, all expenses for services provided by Vanguard to the fund and all other expenses incurred by the fund during the period ended September 30, 2016, were borne by the underlying Vanguard funds in which the fund invests. The fund’s trustees and officers are also trustees and officers, respectively, of the underlying Vanguard funds, as well as directors and employees, respectively, of Vanguard.

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