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Institutional Holdings of AMERICAN RAILCAR INDUSTRIES, INC. (ARII) on 12/31/2011

1. Company Information

Company/StockAMERICAN RAILCAR INDUSTRIES, INC. (stock symbol: ARII)
Funds Ownership78 out of total 3028 funds (3%) own this stock
Funds own total 20,360,968 shares, 95.37% of all outstanding shares
Funds BOUGHT 31,832 more shares (+0.16%) in the quarter ended on 12/31/2011

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

No.FundSharesPut/CallActivity(Shr)% Port.% Out. Shrs
1.)ICAHN CARL C11,848,898Added 0.32%2.43%55.50%
2.)ADVISORY RESEARCH INC2,127,077Cut -2.75%1.05%9.96%
3.)DIMENSIONAL FUND ADVISORS INC1,695,783Cut -1.72%0.05%7.94%
4.)VANGUARD GROUP INC481,985Added 3.20%0.00%2.26%
5.)F&C ASSET MANAGEMENT PLC334,344Cut -2.65%0.14%1.57%
6.)CALIFORNIA PUBLIC EMPLOYEES RETIREMENT SYSTEM217,697Cut -1.64%0.02%1.02%
7.)BLACKROCK FUND ADVISORS213,208Added 2.67%0.00%1.00%
8.)EMERALD ADVISERS INC PA208,431Added 0.56%0.43%0.98%
9.)FRIESS ASSOCIATES LLC196,925New0.12%0.92%
10.)ACK ASSET MANAGEMENT LLC191,336New2.69%0.90%
11.)STATE STREET CORP180,633Cut -6.19%0.00%0.85%
12.)PUTNAM INVESTMENT MANAGEMENT LLC179,016New0.01%0.84%
13.)RENAISSANCE TECHNOLOGIES LLC170,700Cut -3.72%0.02%0.80%
14.)TECHNICAL FINANCIAL SERVICES LLC154,807Added 13.47%0.21%0.73%
15.)NORTHERN TRUST CORP146,525Added 1.39%0.00%0.69%
16.)DRIEHAUS CAPITAL MANAGEMENT LLC136,137Added 100.24%0.17%0.64%
17.)AMERICAN FINANCIAL GROUP INC135,581Unchanged0.32%0.64%
18.)ROYCE & ASSOCIATES LLC124,409Cut -5.83%0.01%0.58%
19.)BLACKROCK INSTITUTIONAL TRUST COMPANY NA122,238Added 9.79%0.00%0.57%
20.)ALLIANZ GLOBAL INVESTORS OF AMERICA L P108,500Cut -2.95%0.01%0.51%



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

No.FundSharesPut/CallActivity(Shr)% Port.% Out. Shrs
1.)ACK ASSET MANAGEMENT LLC191,336New2.69%0.90%
2.)ICAHN CARL C11,848,898Added 0.32%2.43%55.50%
3.)ADVISORY RESEARCH INC2,127,077Cut -2.75%1.05%9.96%
4.)HORRELL CAPITAL MANAGEMENT INC37,704Added 1.24%0.69%0.18%
5.)EMERALD MUTUAL FUND ADVISERS TRUST81,203Added 4.95%0.63%0.38%
6.)HELIOS ADVISORS LLC12,000New0.50%0.06%
7.)EMERALD ADVISERS INC PA208,431Added 0.56%0.43%0.98%
8.)WAGONHOUND INVESTMENTS LP77,714Cut -0.22%0.34%0.36%
9.)AMERICAN FINANCIAL GROUP INC135,581Unchanged0.32%0.64%
10.)TETON ADVISORS INC54,000Unchanged0.27%0.25%
11.)GRANITE INVESTMENT PARTNERS LLC33,361New0.22%0.16%
12.)TECHNICAL FINANCIAL SERVICES LLC154,807Added 13.47%0.21%0.73%
13.)ARDSLEY ADVISORY PARTNERS40,000New0.20%0.19%
14.)CALDWELL & ORKIN INC15,900New0.20%0.07%
15.)DRIEHAUS CAPITAL MANAGEMENT LLC136,137Added 100.24%0.17%0.64%
16.)GRT CAPITAL PARTNERS LLC21,000Cut -8.70%0.16%0.10%
17.)F&C ASSET MANAGEMENT PLC334,344Cut -2.65%0.14%1.57%
18.)FRIESS ASSOCIATES LLC196,925New0.12%0.92%
19.)COE CAPITAL MANAGEMENT LLC10,000New0.08%0.05%
20.)PENN CAPITAL MANAGEMENT CO INC72,769Cut -67.90%0.07%0.34%

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

No.FundSharesPut/Call% Port.% Out. Shrs
1.)FRIESS ASSOCIATES LLC196,9250.12%0.92%
2.)ACK ASSET MANAGEMENT LLC191,3362.69%0.90%
3.)PUTNAM INVESTMENT MANAGEMENT LLC179,0160.01%0.84%
4.)IMPALA ASSET MANAGEMENT LLC43,4500.06%0.20%
5.)ARDSLEY ADVISORY PARTNERS40,0000.20%0.19%
6.)FMR LLC33,9000.00%0.16%
7.)GRANITE INVESTMENT PARTNERS LLC33,3610.22%0.16%
8.)CALDWELL & ORKIN INC15,9000.20%0.07%
9.)GENEVA INVESTMENT MANAGEMENT OF CHICAGO LLC13,4550.01%0.06%
10.)HELIOS ADVISORS LLC12,0000.50%0.06%
11.)APERIO GROUP LLC10,8880.01%0.05%
12.)COE CAPITAL MANAGEMENT LLC10,0000.08%0.05%
13.)AQR CAPITAL MANAGEMENT LLC9,2000.00%0.04%
14.)JEFFERIES GROUP INC DE 8,8000.00%0.04%
15.)SUSQUEHANNA INTERNATIONAL GROUP LLP8,800CALL0.00%0.04%

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

No.FundSharesPut/Call% Port.% Out. Shrs
1.)WHIPPOORWILL ASSOCIATES INC189,7852.22%0.89%
2.)MILLENNIUM MANAGEMENT LLC172,4830.03%0.81%
3.)HARRIS FINANCIAL CORP34,5300.00%0.16%
4.)SAC CAPITAL ADVISORS LP28,2750.00%0.13%
5.)JASINKIEWICZ CAPITAL MANAGEMENT LLC11,1360.76%0.05%
6.)MORGAN STANLEY10,1610.00%0.05%
7.)CONTRAVISORY RESEARCH & MANAGEMENT CORP6,0100.03%0.03%
8.)FIRST NEW YORK SECURITIES LLC NY5,0000.03%0.02%
9.)PUBLIC EMPLOYEES RETIREMENT SYSTEM OF OHIO4,9730.00%0.02%
10.)BATTERYMARCH FINANCIAL MANAGEMENT INC3,7200.00%0.02%
11.)EMPLOYEES RETIREMENT SYSTEM OF TEXAS3,1720.00%0.01%
12.)BLACKROCK GROUP LTD2,9360.00%0.01%
13.)CATAPULT CAPITAL MANAGEMENT LLC1,7000.01%0.01%
14.)ENTERPRISE FINANCIAL SERVICES CORP3000.01%0.00%
15.)ENVESTNET ASSET MANAGEMENT INC600.00%0.00%
16.)US BANCORP DE 300.00%0.00%