Notable Holders of THE RUBICON PROJECT, Inc. (RUBI)
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* Does Not Fully Represent All Holders
| Fund | Title | Shares | % Owned | Source |
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| Mayfield XII Management, L.L.C. | Common Stock | 2,207,758 | 6.16% | 13F |
| BlackRock Fund Advisors | COM | 1,202,907 | 3.35% | 13F |
| BlackRock Institutional Trust Company, N.A. | COM | 757,620 | 2.11% | 13F |
| BlackRock Investment Management, LLC | COM | 151,803 | 0.42% | 13F |
| Shinko Asset Management Co., Ltd. | COM | 132,532 | 0.37% | 13F |
| Commonwealth Equity Services, Inc | COM | 94,820 | 0.26% | 13F |
| KCG Holdings, Inc. | COM | 93,842 | 0.26% | 13F |
| R&F Capital Advisors LP | COM | 43,723 | 0.12% | 13F |
| Airain ltd | Com | 39,715 | 0.11% | 13F |
| Leap Investments LP | Common Stock | 29,700 | 0.08% | 13F |
| Blue Clay Capital Management, LLC | COM | 26,366 | 0.07% | 13F |
| BlackRock Group LTD | COM | 23,518 | 0.07% | 13F |
| BLACKROCK ADVISORS LLC | COM | 19,755 | 0.06% | 13F |
| Emerald Acquisition Ltd. | Common Stocks | 17,100 | 0.05% | 13F |
| Spot Trading L.L.C | COM | 7,587 | 0.02% | 13F |
