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Institutional Holdings of WESTPORT INNOVATIONS INC (WPRT) on 12/31/2011

1. Company Information

Company/StockWESTPORT INNOVATIONS INC (stock symbol: WPRT)
Funds Ownership126 out of total 3028 funds (4%) own this stock
Funds own total 25,938,186 shares, 55.04% of all outstanding shares
Funds BOUGHT 2,130,167 more shares (+8.95%) in the quarter ended on 12/31/2011

2. Top 20 Funds Held WPRT in this Quarter (By Shares) Add to Yahoo Finance Message Board

No.FundSharesPut/CallActivity(Shr)% Port.% Out. Shrs
1.)FMR LLC3,517,141Added 196.69%0.02%7.46%
2.)MANNING & NAPIER ADVISORS INC3,385,840Cut -16.47%0.59%7.18%
3.)SOROS FUND MANAGEMENT LLC3,228,063Added 2.15%2.35%6.85%
4.)LORD ABBETT & CO LLC1,210,638Cut -4.19%0.10%2.57%
5.)CUPPS CAPITAL MANAGEMENT LLC1,082,446Added 21.89%5.36%2.30%
6.)KING LUTHER CAPITAL MANAGEMENT CORP1,018,272Cut -2.07%0.47%2.16%
7.)TCW GROUP INC781,634Added 17.14%0.12%1.66%
8.)WALL STREET ASSOCIATES726,210Cut -6.28%2.09%1.54%
9.)CAPITAL WORLD INVESTORS600,000Unchanged0.01%1.27%
10.)WELLS FARGO & CO MN542,807Added 907.08%0.01%1.15%
11.)DRIEHAUS CAPITAL MANAGEMENT LLC501,422Added 60.88%0.85%1.06%
12.)SANDLER CAPITAL MANAGEMENT487,400New1.26%1.03%
13.)ARDSLEY ADVISORY PARTNERS465,000Unchanged3.23%0.99%
14.)PUBLIC SECTOR PENSION INVESTMENT BOARD448,740Added 2.63%0.13%0.95%
15.)ESSEX INVESTMENT MANAGEMENT CO LLC439,165Cut -8.23%1.46%0.93%
16.)MASON STREET ADVISORS LLC415,000New0.10%0.88%
17.)LOOMIS SAYLES & CO L P397,980Added 17.44%0.06%0.84%
18.)MUHLENKAMP & CO INC339,225Cut -4.64%2.33%0.72%
19.)BLACKROCK INSTITUTIONAL TRUST COMPANY NA313,433Added 5.11%0.00%0.67%
20.)PUTNAM INVESTMENT MANAGEMENT LLC303,000Unchanged0.03%0.64%



3. Top 20 Funds Held WPRT in this Quarter (By % of Portfolio) Add to Yahoo Finance Message Board

No.FundSharesPut/CallActivity(Shr)% Port.% Out. Shrs
1.)CUPPS CAPITAL MANAGEMENT LLC1,082,446Added 21.89%5.36%2.30%
2.)ARDSLEY ADVISORY PARTNERS465,000Unchanged3.23%0.99%
3.)NORMAN FIELDS GOTTSCHO CAPITAL MANAGEMENT LLC77,707Cut -1.52%2.49%0.16%
4.)BRIDGECREEK INVESTMENT MANAGEMENT LLC157,280Cut -15.31%2.36%0.33%
5.)SOROS FUND MANAGEMENT LLC3,228,063Added 2.15%2.35%6.85%
6.)MUHLENKAMP & CO INC339,225Cut -4.64%2.33%0.72%
7.)HAWKSHAW CAPITAL MANAGEMENT LLC68,578New2.14%0.15%
8.)WALL STREET ASSOCIATES726,210Cut -6.28%2.09%1.54%
9.)ESPALIER GLOBAL MANAGEMENT LLC122,000New1.91%0.26%
10.)D L CARLSON INVESTMENT GROUP INC165,200Cut -0.54%1.66%0.35%
11.)AH LISANTI CAPITAL GROWTH LLC90,865Cut -33.71%1.55%0.19%
12.)BENCHMARK CAPITAL ADVISORS63,600Cut -32.05%1.52%0.13%
13.)ESSEX INVESTMENT MANAGEMENT CO LLC439,165Cut -8.23%1.46%0.93%
14.)ACCOUNT MANAGEMENT LLC36,750New1.34%0.08%
15.)SANDLER CAPITAL MANAGEMENT487,400New1.26%1.03%
16.)HODGES CAPITAL MANAGEMENT INC147,050Added 151.15%1.19%0.31%
17.)STELLIAM INVESTMENT MANAGEMENT LP297,500Cut -19.05%1.14%0.63%
18.)RIDGECREST INVESTMENT MANAGEMENT LLC20,050Cut -19.80%1.05%0.04%
19.)DRIEHAUS CAPITAL MANAGEMENT LLC501,422Added 60.88%0.85%1.06%
20.)POINTSTATE CAPITAL LP300,000New0.77%0.64%

4. Top 20 Funds BOUGHT NEW WPRT in this Quarter (By Shares) Add to Yahoo Finance Message Board

No.FundSharesPut/Call% Port.% Out. Shrs
1.)SANDLER CAPITAL MANAGEMENT487,4001.26%1.03%
2.)MASON STREET ADVISORS LLC415,0000.10%0.88%
3.)POINTSTATE CAPITAL LP300,0000.77%0.64%
4.)FARALLON CAPITAL MANAGEMENT LLC234,2000.19%0.50%
5.)ESPALIER GLOBAL MANAGEMENT LLC122,0001.91%0.26%
6.)CASTLEARK MANAGEMENT LLC92,0000.12%0.20%
7.)HAWKSHAW CAPITAL MANAGEMENT LLC68,5782.14%0.15%
8.)TORONTO DOMINION BANK56,000PUT0.01%0.12%
9.)ROYAL BANK OF CANADA 38,400CALL0.00%0.08%
10.)ACCOUNT MANAGEMENT LLC36,7501.34%0.08%
11.)GABELLI SECURITIES INC30,0000.28%0.06%
12.)BANK OF NOVA SCOTIA 20,0000.00%0.04%
13.)CITADEL ADVISORS LLC18,6280.00%0.04%
14.)CALDWELL & ORKIN INC13,0000.22%0.03%
15.)NOMURA HOLDINGS INC9,8000.00%0.02%
16.)STATE STREET CORP7,6280.00%0.02%
17.)LADENBURG THALMANN FINANCIAL SERVICES INC7,5060.01%0.02%
18.)UNITED CAPITAL FINANCIAL ADVISERSINC6,7210.01%0.01%
19.)CREATIVE PLANNING6,7000.02%0.01%
20.)ARROWSTREET CAPITAL LIMITED PARTNERSHIP6,6620.00%0.01%

5. Top 20 Funds SOLD OUT WPRT in this Quarter (By Shares) Add to Yahoo Finance Message Board

No.FundSharesPut/Call% Port.% Out. Shrs
1.)TEACHER RETIREMENT SYSTEM OF TEXAS295,0000.06%0.63%
2.)RENAISSANCE TECHNOLOGIES LLC291,4000.04%0.62%
3.)POLAR SECURITIES INC200,000PUT0.44%0.42%
4.)TYGH CAPITAL MANAGEMENT INC172,6630.34%0.37%
5.)GRUBER & MCBAINE CAPITAL MANAGEMENT LLC110,0500.79%0.23%
6.)CITIGROUP INC90,000CALL0.00%0.19%
7.)MILLENNIUM MANAGEMENT LLC87,0240.03%0.18%
8.)RICE HALL JAMES & ASSOCIATES LLC72,6040.23%0.15%
9.)NUVEEN ASSET MANAGEMENT LLC59,8690.02%0.13%
10.)DIAMONDBACK CAPITAL MANAGEMENT LLC52,7000.06%0.11%
11.)WOODBINE CAPITAL ADVISORS LP49,3600.57%0.10%
12.)PERELLA WEINBERG PARTNERS CAPITAL MANAGEMENT LP39,3400.05%0.08%
13.)PHILADELPHIA TRUST CO31,4000.09%0.07%
14.)GABELLI FUNDS LLC30,0000.01%0.06%
15.)CITIGROUP INC25,7410.00%0.05%
16.)WEXFORD CAPITAL LLC19,6070.08%0.04%
17.)WEISS MULTI STRATEGY ADVISERS LLC17,5560.02%0.04%
18.)COMPTON CAPITAL MANAGEMENT INC RI10,1000.27%0.02%
19.)CREDIT SUISSE 9,600CALL0.00%0.02%
20.)FORT WASHINGTON INVESTMENT ADVISORS INC OH 9,5000.01%0.02%