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Form 13F-HR SpiderRock Advisors, For: Mar 31

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May 12, 2021 2:47 PM EDT

The Securities and Exchange Commission has not necessarily reviewed the information in this filing and has not determined if it is accurate and complete.
The reader should not assume that the information is accurate and complete.

UNITED STATES SECURITIES AND EXCHANGE COMMISSION
Washington, D.C. 20549
FORM 13F

FORM 13F COVER PAGE
OMB APPROVAL
OMB Number: 3235-0006
Expires: July 31, 2015
Estimated average burden
hours per response: 23.8
Report for the Calendar Year or Quarter Ended: 03-31-2021
Check here if Amendment   Amendment Number:
This Amendment (Check only one.):   is a restatement.
  adds new holdings entries.
Institutional Investment Manager Filing this Report:
Name: SpiderRock Advisors, LLC
Address: 300 S. RIVERSIDE PLAZA
SUITE 2350
CHICAGO , IL60606
Form 13F File Number: 028-18017

The institutional investment manager filing this report and the person by whom it is signed hereby represent that the person signing the report is authorized to submit it, that all information contained herein is true, correct and complete, and that it is understood that all required items, statements, schedules, lists, and tables, are considered integral parts of this form.

Person Signing this Report on Behalf of Reporting Manager:
Name: Edwin Bruce Mumford
Title: Chief Financial Officer
Phone: 312.256.9663
Signature, Place, and Date of Signing:
E. Bruce Mumford Chicago , IL 05-12-2021
[Signature] [City, State] [Date]
Report Type (Check only one.):
X 13F HOLDINGS REPORT. (Check here if all holdings of this reporting manager are reported in this report.)
  13F NOTICE. (Check here if no holdings reported are in this report, and all holdings are reported by other reporting manager(s).)
  13F COMBINATION REPORT. (Check here if a portion of the holdings for this reporting manager are reported in this report and a portion are reported by other reporting manager(s).)
Form 13F Summary Page
Report Summary:
Number of Other Included Managers: 0
Form 13F Information Table Entry Total: 173
Form 13F Information Table Value Total: 714,918
(thousands)
List of Other Managers Reporting for this Manager:
[If there are no entries in this list, omit this section.]
Form 13F File Number Name

List of Other Included Managers:
Provide a numbered list of the name(s) and Form 13F file number(s) of all institutional investment managers with respect to which this report is filed, other than the manager filing this report.
[If there are no entries in this list, state “NONE” and omit the column headings and list entries.]
No. Form 13F File Number Name

The Securities and Exchange Commission has not necessarily reviewed the information in this filing and has not determined if it is accurate and complete.
The reader should not assume that the information is accurate and complete.

UNITED STATES SECURITIES AND EXCHANGE COMMISSION
Washington, D.C. 20549
FORM 13F

FORM 13F INFORMATION TABLE
OMB APPROVAL
OMB Number: 3235-0006
Expires: July 31, 2015
Estimated average burden
hours per response: 23.8
COLUMN 1 COLUMN 2 COLUMN 3 COLUMN 4 COLUMN 5 COLUMN 6 COLUMN 7 COLUMN 8
VALUE SHRS OR SH/ PUT/ INVESTMENT OTHER VOTING AUTHORITY
NAME OF ISSUER TITLE OF CLASS CUSIP (x$1000) PRN AMT PRN CALL DISCRETION MANAGER SOLE SHARED NONE
3M Co Ordinary Shares 88579Y101 852 6,200 PRN Put SOLE 6,200 0 0
Abbott Laboratories Ordinary Shares 002824100 49 500 PRN Put SOLE 500 0 0
Abbvie Inc Ordinary Shares 00287Y109 32 500 PRN Put SOLE 500 0 0
Accenture plc Ordinary Shares G1151C101 1,484 6,900 PRN Put SOLE 6,900 0 0
Adobe Inc Ordinary Shares 00724F101 897 2,300 PRN Put SOLE 2,300 0 0
Advanced Micro Devic Ordinary Shares 007903107 478 5,100 PRN Call SOLE 5,100 0 0
Advanced Micro Devic Ordinary Shares 007903107 172 2,600 PRN Put SOLE 2,600 0 0
AeroVironment Inc Ordinary Shares 008073108 217 2,400 PRN Put SOLE 2,400 0 0
Alibaba Group Holdin ADR 01609W102 630 4,000 PRN Put SOLE 4,000 0 0
Alphabet Inc Ordinary Shares 02079K107 288 200 PRN Put SOLE 200 0 0
Alphabet Inc Ordinary Shares 02079K305 1,884 1,800 PRN Put SOLE 1,800 0 0
Altria Group Inc Ordinary Shares 02209S103 309 10,300 PRN Put SOLE 10,300 0 0
Amazoncom Inc Ordinary Shares 023135106 3,648 1,800 PRN Put SOLE 1,800 0 0
Amcor Plc Ordinary Shares G0250X107 431 43,600 PRN Put SOLE 43,600 0 0
AMGEN Inc Ordinary Shares 031162100 1,368 7,800 PRN Put SOLE 7,800 0 0
Analog Devices Inc Ordinary Shares 032654105 780 6,500 PRN Put SOLE 6,500 0 0
Anthem Inc Ordinary Shares 036752103 108 400 PRN Put SOLE 400 0 0
Aon plc Ordinary Shares G0403H108 262 1,500 PRN Put SOLE 1,500 0 0
Apple Inc Ordinary Shares 037833100 16,171 209,700 PRN Put SOLE 209,700 0 0
ARK Investment Manag ARK Innovation 00214Q104 1,212 11,400 PRN Put SOLE 11,400 0 0
Asana Inc Ordinary Shares 04342Y104 879 58,600 PRN Put SOLE 58,600 0 0
AT&T Inc Ordinary Shares 00206R102 8,428 264,000 PRN Call SOLE 264,000 0 0
AT&T Inc Ordinary Shares 00206R102 3,960 171,500 PRN Put SOLE 171,500 0 0
Bank Of America Corp Ordinary Shares 060505104 274 11,900 PRN Put SOLE 11,900 0 0
Barclays Bank PLC ZC SP ETN REDEE 06746P621 72 8,000 PRN Put SOLE 8,000 0 0
Becton Dickinson An Ordinary Shares 075887109 22,031 106,800 PRN Put SOLE 106,800 0 0
Berkeley Lights Inc Ordinary Shares 084310101 182 3,300 PRN Put SOLE 3,300 0 0
Berkshire Hathaway I Ordinary Shares 084670702 495 3,000 PRN Put SOLE 3,000 0 0
Biomarin Pharmaceuti Registered Shar 09061G101 592 8,800 PRN Put SOLE 8,800 0 0
BlackRock Institutio iShares MSCI Em 464287234 1,991 37,200 PRN Call SOLE 37,200 0 0
BlackRock Institutio iShares MSCI EA 464287465 1,481 20,100 PRN Call SOLE 20,100 0 0
BlackRock Institutio iShares Russell 464287655 11,503 57,200 PRN Call SOLE 57,200 0 0
BlackRock Institutio iShares Silver 46428Q109 483 20,500 PRN Call SOLE 20,500 0 0
BlackRock Institutio BTC iShares 20+ 464287432 29 200 PRN Call SOLE 200 0 0
BlackRock Institutio iShares MSCI Em 464287234 3,880 118,300 PRN Put SOLE 118,300 0 0
BlackRock Institutio iShares MSCI EA 464287465 6,746 126,200 PRN Put SOLE 126,200 0 0
BlackRock Institutio iShares iBoxx U 464288513 120 1,500 PRN Put SOLE 1,500 0 0
BlackRock Institutio BTC iShares Nas 464287556 36,212 252,500 PRN Put SOLE 252,500 0 0
BlackRock Institutio iShares Russell 464287655 2,942 14,900 PRN Put SOLE 14,900 0 0
BlackRock Institutio BTC iShares 20+ 464287432 198 1,500 PRN Put SOLE 1,500 0 0
Cboe Global Markets Ordinary Shares 12503M108 234 3,600 PRN Put SOLE 3,600 0 0
Chegg Inc Ordinary Shares 163092109 380 4,000 PRN Call SOLE 4,000 0 0
Chegg Inc Ordinary Shares 163092109 935 20,000 PRN Put SOLE 20,000 0 0
Chubb Limited Ordinary Shares H1467J104 85 1,000 PRN Put SOLE 1,000 0 0
Cigna Corp Ordinary Shares 125523100 580 4,000 PRN Put SOLE 4,000 0 0
Cincinnati Financial Ordinary Shares 172062101 98 1,500 PRN Put SOLE 1,500 0 0
Cloudflare Inc Ordinary Shares 18915M107 24,032 400,000 PRN Put SOLE 400,000 0 0
CME Group Inc Ordinary Shares 12572Q105 2,489 15,500 PRN Put SOLE 15,500 0 0
Coca-Cola Co Ordinary Shares 191216100 2,888 77,000 PRN Put SOLE 77,000 0 0
Coca-Cola European P Ordinary Shares G25839104 753 25,100 PRN Put SOLE 25,100 0 0
Colgate-Palmolive Co Ordinary Shares 194162103 322 4,600 PRN Put SOLE 4,600 0 0
Comcast Corp Ordinary Shares 20030N101 182 5,100 PRN Put SOLE 5,100 0 0
Consolidated Edison Ordinary Shares 209115104 162 2,400 PRN Put SOLE 2,400 0 0
CSX Corp Ordinary Shares 126408103 274 3,500 PRN Put SOLE 3,500 0 0
Datadog Inc Ordinary Shares 23804L103 300 3,000 PRN Call SOLE 3,000 0 0
Dexcom Inc Ordinary Shares 252131107 78 300 PRN Put SOLE 300 0 0
Diamondback Energy I Ordinary Shares 25278X109 161 4,600 PRN Put SOLE 4,600 0 0
Digital Realty Trust Ordinary Shares 253868103 160 1,300 PRN Put SOLE 1,300 0 0
Direxion Shares ETF Direxion Daily 25459Y694 165 5,500 PRN Put SOLE 5,500 0 0
Dominion Energy Inc Ordinary Shares 25746U109 25 300 PRN Call SOLE 300 0 0
Dow Inc Ordinary Shares 260557103 63 1,800 PRN Put SOLE 1,800 0 0
Duke Energy Corp Ordinary Shares 26441C204 154 2,100 PRN Put SOLE 2,100 0 0
EBay Inc Ordinary Shares 278642103 284 6,300 PRN Put SOLE 6,300 0 0
Ecolab Inc Ordinary Shares 278865100 1,647 8,700 PRN Put SOLE 8,700 0 0
Emerson Electric Co Ordinary Shares 291011104 34 500 PRN Put SOLE 500 0 0
ETF Managers Group L ETFMG Alternati 26924G508 91 3,500 PRN Call SOLE 3,500 0 0
Exxon Mobil Corp Ordinary Shares 30231G102 1,220 20,000 PRN Call SOLE 20,000 0 0
Exxon Mobil Corp Ordinary Shares 30231G102 192 6,000 PRN Put SOLE 6,000 0 0
Facebook Inc Ordinary Shares 30303M102 3,641 19,800 PRN Put SOLE 19,800 0 0
Fedex Corp Ordinary Shares 31428X106 212 1,000 PRN Put SOLE 1,000 0 0
Fidelity National In Ordinary Shares 31620M106 58 500 PRN Put SOLE 500 0 0
Fiserv Inc Ordinary Shares 337738108 57 600 PRN Put SOLE 600 0 0
fuboTV Inc Ordinary Shares 35953D104 171 3,800 PRN Put SOLE 3,800 0 0
Global Payments Inc Ordinary Shares 37940X102 111 800 PRN Put SOLE 800 0 0
Heico Corp Ordinary Shares 422806109 99 900 PRN Put SOLE 900 0 0
Henry Schein Inc Ordinary Shares 806407102 261 3,600 PRN Call SOLE 3,600 0 0
Home Depot Inc Ordinary Shares 437076102 1,375 5,900 PRN Put SOLE 5,900 0 0
Idexx Laboratories Ordinary Shares 45168D104 5,037 12,100 PRN Put SOLE 12,100 0 0
Intel Corp Ordinary Shares 458140100 480 11,000 PRN Put SOLE 11,000 0 0
Invesco Capital Mana Invesco QQQ Tru 46090E103 130 400 PRN Call SOLE 400 0 0
John Bean Technologi Ordinary Shares 477839104 981 10,900 PRN Put SOLE 10,900 0 0
Johnson & Johnson Ordinary Shares 478160104 313 2,400 PRN Put SOLE 2,400 0 0
JPMorgan Chase & Co Ordinary Shares 46625H100 1,388 15,500 PRN Put SOLE 15,500 0 0
Kimberly-Clark Corp Ordinary Shares 494368103 105 1,000 PRN Put SOLE 1,000 0 0
Lam Research Corp Ordinary Shares 512807108 451 1,100 PRN Put SOLE 1,100 0 0
Lilly(Eli) & Co Ordinary Shares 532457108 88 400 PRN Call SOLE 400 0 0
Lilly(Eli) & Co Ordinary Shares 532457108 11,339 88,400 PRN Put SOLE 88,400 0 0
Linde Plc Ordinary Shares G5494J103 44 200 PRN Put SOLE 200 0 0
Lockheed Martin Corp Ordinary Shares 539830109 240 800 PRN Put SOLE 800 0 0
Masimo Corp Ordinary Shares 574795100 80 400 PRN Put SOLE 400 0 0
Mastercard Incorpora Ordinary Shares 57636Q104 240 1,000 PRN Put SOLE 1,000 0 0
McDonald`s Corp Ordinary Shares 580135101 48 300 PRN Put SOLE 300 0 0
Merck & Co Inc Ordinary Shares 58933Y105 388 4,700 PRN Call SOLE 4,700 0 0
Merck & Co Inc Ordinary Shares 58933Y105 164 2,600 PRN Put SOLE 2,600 0 0
Meridian Bioscience Ordinary Shares 589584101 130 6,500 PRN Put SOLE 6,500 0 0
Metlife Inc Ordinary Shares 59156R108 136 3,200 PRN Put SOLE 3,200 0 0
Microsoft Corporatio Ordinary Shares 594918104 17,160 101,000 PRN Put SOLE 101,000 0 0
Mondelez Internation Ordinary Shares 609207105 218 4,600 PRN Put SOLE 4,600 0 0
MP Materials Corpora Ordinary Shares 553368101 2,253 75,100 PRN Put SOLE 75,100 0 0
MSCI Inc Ordinary Shares 55354G100 540 1,800 PRN Put SOLE 1,800 0 0
National Fuel Gas Co Ordinary Shares 636180101 220 6,000 PRN Put SOLE 6,000 0 0
NetFlix Inc Ordinary Shares 64110L106 397 1,100 PRN Put SOLE 1,100 0 0
NextEra Energy Inc Ordinary Shares 65339F101 49 700 PRN Put SOLE 700 0 0
Nike Inc Ordinary Shares 654106103 1,608 13,800 PRN Put SOLE 13,800 0 0
Norfolk Southern Cor Ordinary Shares 655844108 128 700 PRN Put SOLE 700 0 0
Northrop Grumman Cor Ordinary Shares 666807102 1,639 6,400 PRN Put SOLE 6,400 0 0
NVIDIA Corp Ordinary Shares 67066G104 312 800 PRN Put SOLE 800 0 0
Oge Energy Corp Ordinary Shares 670837103 45 1,500 PRN Put SOLE 1,500 0 0
Okta Inc Ordinary Shares 679295105 364 2,100 PRN Put SOLE 2,100 0 0
Palantir Technologie Ordinary Shares 69608A108 2,538 149,000 PRN Put SOLE 149,000 0 0
PayPal Holdings Inc Ordinary Shares 70450Y103 1,776 11,900 PRN Put SOLE 11,900 0 0
Pfizer Inc Ordinary Shares 717081103 575 13,000 PRN Call SOLE 13,000 0 0
Philip Morris Intern Ordinary Shares 718172109 394 6,300 PRN Put SOLE 6,300 0 0
Procter & Gamble Co Ordinary Shares 742718109 1,992 16,900 PRN Put SOLE 16,900 0 0
Prudential Financial Ordinary Shares 744320102 531 11,800 PRN Put SOLE 11,800 0 0
Qualcomm Inc Ordinary Shares 747525103 328 3,000 PRN Put SOLE 3,000 0 0
Rockwell Automation Ordinary Shares 773903109 80 400 PRN Put SOLE 400 0 0
Royalty Pharma plc Ordinary Shares G7709Q104 34,236 778,800 PRN Put SOLE 778,800 0 0
RUT Cash Index 124835109 5,400 3,000 PRN Put SOLE 3,000 0 0
S&P Global Inc Ordinary Shares 78409V104 1,774 6,300 PRN Put SOLE 6,300 0 0
Sarepta Therapeutics Ordinary Shares 803607100 273 1,400 PRN Call SOLE 1,400 0 0
SBA Communications C Ordinary Shares 78410G104 225 1,000 PRN Put SOLE 1,000 0 0
Seagate Technology P Ordinary Shares G7945M107 80 2,000 PRN Put SOLE 2,000 0 0
Sempra Energy Ordinary Shares 816851109 72 800 PRN Put SOLE 800 0 0
ServiceNow Inc Ordinary Shares 81762P102 831 2,100 PRN Put SOLE 2,100 0 0
Sherwin-Williams Co Ordinary Shares 824348106 1,372 2,200 PRN Put SOLE 2,200 0 0
Simulations Plus Inc Ordinary Shares 829214105 240 4,000 PRN Put SOLE 4,000 0 0
Skyworks Solutions Ordinary Shares 83088M102 492 4,100 PRN Put SOLE 4,100 0 0
Snap Inc Ordinary Shares 83304A106 68 2,000 PRN Put SOLE 2,000 0 0
Snowflake Inc Ordinary Shares 833445109 27,503 161,000 PRN Put SOLE 161,000 0 0
Southern Company Ordinary Shares 842587107 45 1,000 PRN Put SOLE 1,000 0 0
SP Plus Corp Ordinary Shares 78469C103 106 7,500 PRN Put SOLE 7,500 0 0
SPDR Series Trust SPDR Retail ETF 78464A714 147 1,500 PRN Call SOLE 1,500 0 0
Spotify Technology S Ordinary Shares L8681T102 182 700 PRN Put SOLE 700 0 0
SPX Cash Index 648815108 4,660 1,100 PRN Call SOLE 1,100 0 0
SPX Cash Index 648815108 27,115 7,900 PRN Put SOLE 7,900 0 0
Square Inc Ordinary Shares 852234103 666 3,600 PRN Put SOLE 3,600 0 0
SSgA Active Trust SPDR Gold Share 78463V107 90 500 PRN Call SOLE 500 0 0
SSgA Active Trust S&P 500 ETF TRU 78462F103 26,904 68,200 PRN Call SOLE 68,200 0 0
SSgA Active Trust SPDR Homebuilde 78464A888 37 500 PRN Call SOLE 500 0 0
SSgA Active Trust The Energy Sele 81369Y506 1,202 20,400 PRN Call SOLE 20,400 0 0
SSgA Active Trust Industrial Sele 81369Y704 50 500 PRN Call SOLE 500 0 0
SSgA Active Trust S&P 500 ETF TRU 78462F103 96,967 295,500 PRN Put SOLE 295,500 0 0
SSgA Active Trust Technology Sele 81369Y803 397 3,800 PRN Put SOLE 3,800 0 0
SSgA Active Trust Health Care Sel 81369Y209 47,322 422,700 PRN Put SOLE 422,700 0 0
Starbucks Corp Ordinary Shares 855244109 6,968 88,700 PRN Put SOLE 88,700 0 0
Stryker Corp Ordinary Shares 863667101 100 500 PRN Put SOLE 500 0 0
Teleflex Incorporate Ordinary Shares 879369106 192 600 PRN Put SOLE 600 0 0
Tesla Inc Ordinary Shares 88160R101 50 100 PRN Call SOLE 100 0 0
Tesla Inc Ordinary Shares 88160R101 729 2,000 PRN Put SOLE 2,000 0 0
Texas Instruments In Ordinary Shares 882508104 368 2,800 PRN Put SOLE 2,800 0 0
Textron Inc Ordinary Shares 883203101 226 8,200 PRN Put SOLE 8,200 0 0
Thermo Fisher Scient Ordinary Shares 883556102 240 600 PRN Put SOLE 600 0 0
Unitedhealth Group I Ordinary Shares 91324P102 1,962 7,000 PRN Put SOLE 7,000 0 0
Unity Software Inc Ordinary Shares 91332U101 159,154 1,669,700 PRN Put SOLE 1,669,700 0 0
VanEck Vectors ETF T VanEck Vectors 92189F106 687 16,200 PRN Call SOLE 16,200 0 0
VanEck Vectors ETF T VanEck Vectors 92189F676 6,536 27,500 PRN Call SOLE 27,500 0 0
Verisign Inc Ordinary Shares 92343E102 1,606 9,300 PRN Put SOLE 9,300 0 0
Verizon Communicatio Ordinary Shares 92343V104 216 4,600 PRN Put SOLE 4,600 0 0
Vertex Pharmaceutica Ordinary Shares 92532F100 19,565 92,000 PRN Put SOLE 92,000 0 0
ViacomCBS Inc Ordinary Shares 92556H206 12 200 PRN Call SOLE 200 0 0
Visa Inc Ordinary Shares 92826C839 933 5,700 PRN Put SOLE 5,700 0 0
Walmart Inc Ordinary Shares 931142103 82 500 PRN Call SOLE 500 0 0
Walmart Inc Ordinary Shares 931142103 52 400 PRN Put SOLE 400 0 0
Waste Management In Ordinary Shares 94106L109 95 1,000 PRN Put SOLE 1,000 0 0
WEC Energy Group Inc Ordinary Shares 92939U106 270 2,700 PRN Call SOLE 2,700 0 0
WEC Energy Group Inc Ordinary Shares 92939U106 586 7,100 PRN Put SOLE 7,100 0 0
World Wrestling Ente Ordinary Shares 98156Q108 564 16,100 PRN Put SOLE 16,100 0 0
WW Grainger Inc Ordinary Shares 384802104 64 200 PRN Put SOLE 200 0 0
XSP Cash Index 12505Q107 2,144 5,100 PRN Call SOLE 5,100 0 0
Zimmer Biomet Holdin Ordinary Shares 98956P102 25 200 PRN Put SOLE 200 0 0
Zoetis Inc Ordinary Shares 98978V103 364 2,700 PRN Put SOLE 2,700 0 0

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