Notable Holders of Stamps.com, Inc. (STMP)
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* Does Not Fully Represent All Holders
| Fund | Title | Shares | % Owned | Source |
|---|---|---|---|---|
| BlackRock Fund Advisors | COM NEW | 1,230,570 | 7.60% | 13F |
| BlackRock Institutional Trust Company, N.A. | COM NEW | 407,523 | 2.52% | 13F |
| WEATHERBIE M A & CO INC/MA | COM | 369,298 | 2.28% | 13F |
| PEAK6 Investments, L.P. (PUT) | COM NEW | 179,200 | 1.11% | 13F |
| RUSSELL FRANK CO/ | Common Stocks | 170,668 | 1.05% | 13F |
| TEACHERS ADVISORS INC | CS | 157,683 | 0.97% | 13F |
| GW CAPITAL INC | COM NEW | 111,192 | 0.69% | 13F |
| BATTERYMARCH FINANCIAL MANAGEMENT INC | COM NEW | 95,172 | 0.59% | 13F |
| BlackRock Investment Management, LLC | COM NEW | 81,741 | 0.51% | 13F |
| OLD MUTUAL ASSET MANAGERS UK LTD | COM NEW | 56,132 | 0.35% | 13F |
| Marshall Wace North America, L.P. | COMMON STOCK | 53,001 | 0.33% | 13F |
| Emerald Acquisition Ltd. | Common Stocks | 49,293 | 0.30% | 13F |
| Elk Creek Partners, LLC | COM NEW | 47,023 | 0.29% | 13F |
| PIONEER INVESTMENT MANAGEMENT INC | COM NEW | 41,342 | 0.26% | 13F |
| Keane Capital Partners, LLC | COM NEW | 36,000 | 0.22% | 13F |
| TIAA CREF INVESTMENT MANAGEMENT LLC | CS | 33,097 | 0.20% | 13F |
| Shinko Asset Management Co., Ltd. | COM NEW | 31,288 | 0.19% | 13F |
| BlackRock Group LTD | COM NEW | 31,272 | 0.19% | 13F |
| AHL Partners LLP | COM NEW | 28,084 | 0.17% | 13F |
| Airain ltd | Com | 23,810 | 0.15% | 13F |
| SPOT TRADING L.L.C. (PUT) | COM NEW | 21,600 | 0.13% | 13F |
| MANAGED ACCOUNT ADVISORS LLC | COM NEW | 20,674 | 0.13% | 13F |
| Thrax Management, LLC | COM NEW | 20,000 | 0.12% | 13F |
| Aperio Group, LLC | COM NEW | 13,622 | 0.08% | 13F |
| VIRGINIA RETIREMENT SYSTEM | COM NEW | 12,900 | 0.08% | 13F |
| Fox Point Capital Management LLC | COM NEW | 12,500 | 0.08% | 13F |
| GENEVA INVESTMENT MANAGEMENT OF CHICAGO LLC | COM | 10,481 | 0.06% | 13F |
| BLACKROCK ADVISORS LLC | COM NEW | 8,673 | 0.05% | 13F |
| Spot Trading L.L.C (CALL) | COM NEW | 8,600 | 0.05% | 13F |
| Glen Harbor Capital Management LLC | COM | 5,644 | 0.03% | 13F |
| BKS ADVISORS, LLC | COM NEW | 5,099 | 0.03% | 13F |
| DIALECTIC CAPITAL MANAGEMENT, LLC (CALL) | COM NEW | 5,000 | 0.03% | 13F |
| Meadow Creek Investment Management LLC | COM | 4,648 | 0.03% | 13F |
| CAPSTONE ASSET MANAGEMENT CO | COM | 4,414 | 0.03% | 13F |
| NEW CENTURY INVESTMENT MANAGEMENT, INC | COM NEW | 4,100 | 0.03% | 13F |
| Elkfork Partners LLC | COM | 3,652 | 0.02% | 13F |
| OPPENHEIMER FUNDS INC | COM NEW | 3,593 | 0.02% | 13F |
| NATIONAL PENN INVESTORS TRUST CO /PA | Domestic Common | 3,490 | 0.02% | 13F |
| INTEGRAL DERIVATIVES, LLC | COM | 3,464 | 0.02% | 13F |
| Xact Kapitalforvaltning AB | COM | 3,372 | 0.02% | 13F |
| Jump Trading, LLC | Common Stock | 3,019 | 0.02% | 13F |
| Tyers Asset Management LLC | COM | 2,656 | 0.02% | 13F |
| SOCIETE GENERALE | COM | 2,116 | 0.01% | 13F |
| CenterStar Fund, LLC (CALL) | COM NEW | 2,100 | 0.01% | 13F |
| SMITH ASSET MANAGEMENT GROUP LP | Common Stock - Long | 1,965 | 0.01% | 13F |
| RIVERHEAD CAPITAL MANAGEMENT LLC | COM | 1,851 | 0.01% | 13F |
