Notable Holders of Aspen Technology, Inc. (AZPN)
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* Does Not Fully Represent All Holders
| Fund | Title | Shares | % Owned | Source |
|---|---|---|---|---|
| Praesidium Investment Management Company, LLC | COM | 45,327,103 | 48.27% | 13F |
| WADDELL & REED FINANCIAL INC | COM | 15,847,708 | 16.88% | 13F |
| Fidelity Investments | COM | 6,444,938 | 6.86% | 13F |
| VANGUARD GROUP INC | COM | 4,596,910 | 4.90% | 13F |
| BROWN BROTHERS HARRIMAN & CO | COMMON | 3,757,729 | 4.00% | 13F |
| CADIAN CAPITAL MANAGEMENT, LLC | COM | 3,093,707 | 3.29% | 13F |
| ALYDAR PARTNERS LLC | COM | 2,523,919 | 2.69% | 13F |
| OPPENHEIMER FUNDS INC | COM | 2,398,720 | 2.55% | 13F |
| BlackRock Institutional Trust Company, N.A. | COM | 2,209,531 | 2.35% | 13F |
| Contour Asset Management LLC | COM | 2,125,000 | 2.26% | 13F |
| WELLS FARGO & CO/MN | DOMESTIC COMMON | 1,891,242 | 2.01% | 13F |
| ALKEON CAPITAL MANAGEMENT LLC | COM | 1,864,093 | 1.98% | 13F |
| BlackRock Fund Advisors | COM | 1,857,452 | 1.98% | 13F |
| DEUTSCHE BANK AG\ | COM | 1,518,028 | 1.62% | 13F |
| KING LUTHER CAPITAL MANAGEMENT CORP | COM | 1,471,325 | 1.57% | 13F |
| AMERIPRISE FINANCIAL INC | COM | 1,199,592 | 1.28% | 13F |
| NORTHERN TRUST CORP | COM | 1,115,765 | 1.19% | 13F |
| RENAISSANCE TECHNOLOGIES LLC | COM | 1,094,600 | 1.17% | 13F |
| WENTWORTH HAUSER & VIOLICH | COM | 1,019,000 | 1.09% | 13F |
| Clearbridge Advisors, LLC | COM | 901,105 | 0.96% | 13F |
| JPMORGAN CHASE & CO | COMMON | 751,873 | 0.80% | 13F |
| ROYCE & ASSOCIATES LLC | COM | 703,236 | 0.75% | 13F |
| AMERICAN INTERNATIONAL GROUP INC | COM | 574,296 | 0.61% | 13F |
| ING INVESTMENT MANAGEMENT CO | COM | 571,300 | 0.61% | 13F |
| Stephens Investment Management Group LLC | COM | 550,095 | 0.59% | 13F |
| TIAA CREF INVESTMENT MANAGEMENT LLC | COM | 549,134 | 0.58% | 13F |
| FORT WASHINGTON INVESTMENT ADVISORS INC /OH/ | COMMON STOCK | 525,825 | 0.56% | 13F |
| DIMENSIONAL FUND ADVISORS LP | COM | 511,549 | 0.54% | 13F |
| Invesco Ltd. | COMMON | 454,805 | 0.48% | 13F |
| ROYAL BANK OF CANADA \ | COM | 441,497 | 0.47% | 13F |
| PIONEER INVESTMENT MANAGEMENT INC | COMMSTCK | 423,529 | 0.45% | 13F |
| Porter Orlin LLC | COM | 398,593 | 0.42% | 13F |
| VNBTrust, National Association | Equity | 350,058 | 0.37% | 13F |
| GEODE CAPITAL MANAGEMENT LLC | COM | 346,593 | 0.37% | 13F |
| AH Lisanti Capital Growth, LLC | COM | 346,204 | 0.37% | 13F |
| TEACHERS ADVISORS INC | COM | 320,899 | 0.34% | 13F |
| Wellington | COM | 293,159 | 0.31% | 13F |
| WALL STREET ASSOCIATES | COM | 267,100 | 0.28% | 13F |
| Visium Asset Management, LP | COMMON STOCK | 255,620 | 0.27% | 13F |
| BlackRock Investment Management, LLC | COM | 247,375 | 0.26% | 13F |
| ALLIANZ GLOBAL INVESTORS OF AMERICA L P | COM | 227,700 | 0.24% | 13F |
| SCHWAB CHARLES INVESTMENT MANAGEMENT INC | COM | 183,253 | 0.20% | 13F |
| CALIFORNIA PUBLIC EMPLOYEES RETIREMENT SYSTEM | * ASPEN TECHNOLOGY INC | 173,900 | 0.19% | 13F |
| MILLENNIUM MANAGEMENT LLC | COM | 171,719 | 0.18% | 13F |
| BROADVIEW ADVISORS LLC | COM | 162,502 | 0.17% | 13F |
| CREDIT SUISSE AG/ | COM | 161,832 | 0.17% | 13F |
| CAISSE DE DEPOT ET PLACEMENT DU QUEBEC | COMMON | 150,000 | 0.16% | 13F |
| GRUBER & MCBAINE CAPITAL MANAGEMENT LLC | COM | 150,000 | 0.16% | 13F |
| CASTLEARK MANAGEMENT LLC | COM | 146,625 | 0.16% | 13F |
| TFS CAPITAL LLC | COM | 130,171 | 0.14% | 13F |
| IG INVESTMENT MANAGEMENT LTD | COM | 123,341 | 0.13% | 13F |
| MORGAN STANLEY | COM | 118,895 | 0.13% | 13F |
| COMMONWEALTH OF PENNSYLVANIA PUBLIC SCHOOL EMPLS RETRMT SYS | 83,025 | 0.09% | 13F | |
| OXFORD ASSET MANAGEMENT | COM | 83,000 | 0.09% | 13F |
| Goldman Sachs Asset Management, L.P. | CMN | 81,667 | 0.09% | 13F |
| AQR CAPITAL MANAGEMENT LLC | COM | 73,100 | 0.08% | 13F |
| Manulife Asset Management (North America) Ltd | COM | 64,571 | 0.07% | 13F |
| PARAMETRIC PORTFOLIO ASSOCIATES | Common Stock | 61,803 | 0.07% | 13F |
| Lee Munder Capital Group, LLC | COM | 61,385 | 0.07% | 13F |
| BLACKROCK ADVISORS LLC | COM | 59,478 | 0.06% | 13F |
| Advanced Investment Partners, LLC | COM | 59,346 | 0.06% | 13F |
| Jetstream Capital LLC | COM | 57,200 | 0.06% | 13F |
| BRANT POINT INVESTMENT MANAGEMENT LLC | 50,000 | 0.05% | 13F | |
| Jane Street Holding, LLC | COM | 43,112 | 0.05% | 13F |
| SAC Capital | COMMON | 42,915 | 0.05% | 13F |
| GUGGENHEIM CAPITAL LLC | COM | 39,872 | 0.04% | 13F |
| Scepter Holdings, Inc. | COM | 37,200 | 0.04% | 13F |
| FIL Ltd | COM | 33,700 | 0.04% | 13F |
| 300 NORTH CAPITAL, LLC | COM | 30,950 | 0.03% | 13F |
| RAYMOND JAMES & ASSOCIATES | COM | 29,714 | 0.03% | 13F |
| PRINCIPAL FINANCIAL GROUP INC | COM | 28,321 | 0.03% | 13F |
| DIAMONDBACK CAPITAL MANAGEMENT, LLC | COM | 27,334 | 0.03% | 13F |
| RGM Capital, LLC | COM | 25,084 | 0.03% | 13F |
| UNIONBANCAL CORP | COM | 24,200 | 0.03% | 13F |
| D. E. Shaw & Co., INC. | COM | 22,257 | 0.02% | 13F |
| Placemark Investments, Inc. | COM | 21,325 | 0.02% | 13F |
| ARROWSTREET CAPITAL LIMITED PARTNERSHIP | COM | 20,120 | 0.02% | 13F |
| Liberty Mutual Group Asset Management Inc. | COM | 18,680 | 0.02% | 13F |
| Parametrica Management Ltd | COM | 14,473 | 0.02% | 13F |
| TOCQUEVILLE ASSET MANAGEMENT LP | COM | 14,160 | 0.02% | 13F |
| SG Americas Securities, LLC | 13,087 | 0.01% | 13F | |
| CHICAGO EQUITY PARTNERS LLC | COM | 11,525 | 0.01% | 13F |
| HSBC HOLDINGS PLC | 11,186 | 0.01% | 13F |
