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Notable Holders of Aspen Technology, Inc. (AZPN)

  |   Expand Research on AZPN   |   * 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