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ION GEOPHYSICAL CORP
ION GEOPHYSICAL CORP. Institutional holdings reported to the SEC.

Institutional Holders (2014Q1)
Portfolio Summary: 174 Institutional holders with a total value of $441,893,970.
#
Manager Name
Shares
Value ($)
%
Options
Notes
101 AMERICAN INTERNATIONAL GROUP, INC. 103,455 435,546 0.10%
102 MANUFACTURERS LIFE INSURANCE COMPANY, THE 103,507 436,000 0.10%
103 METROPOLITAN LIFE INSURANCE CO/NY 108,002 455,000 0.10%
104 State of Tennessee, Department of Treasury 110,600 466,000 0.11%
105 STATE BOARD OF ADMINISTRATION OF FLORIDA RETIREMENT SYSTEM 111,564 470,000 0.11%
106 OAK ASSOCIATES LTD /OH/ 118,700 500,000 0.11%
107 TEXAS PERMANENT SCHOOL FUND CORP 128,913 543,000 0.12%
108 COMERICA BANK 128,974 543,000 0.12%
109 BARCLAYS PLC 136,893 548,000 0.12%
110 ProShare Advisors LLC 137,456 579,000 0.13%
111 Swiss National Bank 144,600 609,000 0.14%
112 FIRST TRUST ADVISORS LP 145,527 613,000 0.14%
113 New Jersey Better Educational Savings Trust 150,000 632,000 0.14%
114 NOMURA HOLDINGS INC 159,938 673,000 0.15%
115 SUSQUEHANNA INTERNATIONAL GROUP, LLP 165,995 699,000 0.16%
116 GLOBEFLEX CAPITAL L P 173,460 730,000 0.17%
117 RHUMBLINE ADVISERS 188,549 794,000 0.18%
118 BlackRock Group LTD 197,007 829,000 0.19%
119 CITIGROUP INC 200,000 842,000 0.19% Put
120 CREDIT SUISSE AG/ 217,523 917,000 0.21%
121 ALLIANCEBERNSTEIN L.P. 224,700 946,000 0.21%
122 HIGHBRIDGE CAPITAL MANAGEMENT LLC 238,192 1,002,000 0.23%
123 PARAMETRIC PORTFOLIO ASSOCIATES LLC 239,100 1,007,000 0.23%
124 CALIFORNIA STATE TEACHERS RETIREMENT SYSTEM 242,017 1,019,000 0.23%
125 PUBLIC SECTOR PENSION INVESTMENT BOARD 257,658 1,085,000 0.25%
126 TWO SIGMA INVESTMENTS, LP 262,462 1,104,000 0.25%
127 CITIGROUP INC 262,124 1,104,000 0.25%
128 AQR CAPITAL MANAGEMENT LLC 268,800 1,132,000 0.26%
129 NEW YORK STATE COMMON RETIREMENT FUND 272,165 1,146,000 0.26%
130 State of New Jersey Common Pension Fund A 275,000 1,158,000 0.26%
131 VILLERE ST DENIS J & CO LLC 284,186 1,196,000 0.27%
132 TEACHERS ADVISORS, LLC 286,447 1,206,000 0.27%
133 GOLDMAN SACHS GROUP INC 301,688 1,270,000 0.29%
134 MILLENNIUM MANAGEMENT LLC 302,147 1,272,000 0.29%
135 LOS ANGELES CAPITAL MANAGEMENT LLC 321,710 1,354,000 0.31%
136 FMR LLC 325,000 1,368,000 0.31%
137 DEERE & CO 332,399 1,399,000 0.32%
138 PRUDENTIAL FINANCIAL INC 347,304 1,462,000 0.33%
139 JACOBS LEVY EQUITY MANAGEMENT, INC 348,101 1,466,000 0.33%
140 WELLINGTON MANAGEMENT GROUP LLP 355,909 1,498,000 0.34%
141 TFS CAPITAL LLC 379,203 1,596,000 0.36%
142 Pine River Capital Management L.P. 400,000 1,683,000 0.38% Put
143 Pine River Capital Management L.P. 400,000 1,683,000 0.38% Call
144 D. E. Shaw & Co., Inc. 412,438 1,736,000 0.39%
145 NEW YORK STATE TEACHERS RETIREMENT SYSTEM 415,082 1,747,000 0.40%
146 CITADEL ADVISORS LLC 433,647 1,826,000 0.41%
147 PANAGORA ASSET MANAGEMENT INC 477,643 2,011,000 0.46%
148 CALIFORNIA PUBLIC EMPLOYEES RETIREMENT SYSTEM 483,900 2,017,000 0.46%
149 BlackRock Investment Management, LLC 507,478 2,136,000 0.48%
150 Counsel Portfolio Services Inc. 577,175 2,430,000 0.55%
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From 2023-01-03 onward, the SEC requires values to be reported in nearest dollars. Earlier filings reported values in thousands; therefore, positions shown as $0 in older filings may represent actual values between $0–$999.