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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
51 CALIFORNIA STATE TEACHERS RETIREMENT SYSTEM 242,017 1,019,000 0.23%
52 PARAMETRIC PORTFOLIO ASSOCIATES LLC 239,100 1,007,000 0.23%
53 HIGHBRIDGE CAPITAL MANAGEMENT LLC 238,192 1,002,000 0.23%
54 ALLIANCEBERNSTEIN L.P. 224,700 946,000 0.21%
55 CREDIT SUISSE AG/ 217,523 917,000 0.21%
56 CITIGROUP INC 200,000 842,000 0.19% Put
57 BlackRock Group LTD 197,007 829,000 0.19%
58 RHUMBLINE ADVISERS 188,549 794,000 0.18%
59 GLOBEFLEX CAPITAL L P 173,460 730,000 0.17%
60 SUSQUEHANNA INTERNATIONAL GROUP, LLP 165,995 699,000 0.16%
61 NOMURA HOLDINGS INC 159,938 673,000 0.15%
62 New Jersey Better Educational Savings Trust 150,000 632,000 0.14%
63 FIRST TRUST ADVISORS LP 145,527 613,000 0.14%
64 Swiss National Bank 144,600 609,000 0.14%
65 ProShare Advisors LLC 137,456 579,000 0.13%
66 BARCLAYS PLC 136,893 548,000 0.12%
67 TEXAS PERMANENT SCHOOL FUND CORP 128,913 543,000 0.12%
68 COMERICA BANK 128,974 543,000 0.12%
69 OAK ASSOCIATES LTD /OH/ 118,700 500,000 0.11%
70 STATE BOARD OF ADMINISTRATION OF FLORIDA RETIREMENT SYSTEM 111,564 470,000 0.11%
71 State of Tennessee, Department of Treasury 110,600 466,000 0.11%
72 METROPOLITAN LIFE INSURANCE CO/NY 108,002 455,000 0.10%
73 MANUFACTURERS LIFE INSURANCE COMPANY, THE 103,507 436,000 0.10%
74 AMERICAN INTERNATIONAL GROUP, INC. 103,455 435,546 0.10%
75 Nationwide Fund Advisors 102,867 433,000 0.10%
76 SECOR Capital Advisors, LP 100,745 424,000 0.10%
77 BANK OF AMERICA CORP /DE/ 96,948 408,000 0.09%
78 Arizona State Retirement System 91,366 384,000 0.09%
79 JPMORGAN CHASE & CO 89,182 376,000 0.09%
80 RUSSELL FRANK CO/ 88,511 372,000 0.08%
81 VOYA INVESTMENT MANAGEMENT LLC 84,580 356,000 0.08%
82 CORNERSTONE CAPITAL MANAGEMENT HOLDINGS LLC. 83,900 353,000 0.08%
83 PRICE T ROWE ASSOCIATES INC /MD/ 81,300 342,000 0.08%
84 NCM Capital Advisers, Inc. 77,200 325,000 0.07%
85 Weiss Multi-Strategy Advisers LLC 68,790 290,000 0.07%
86 BOSTON ADVISORS LLC 63,031 265,000 0.06%
87 Hillsdale Investment Management Inc. 61,300 258,000 0.06%
88 Louisiana State Employees Retirement System 59,200 249,000 0.06%
89 CAPSTONE ASSET MANAGEMENT CO 58,881 248,000 0.06%
90 OPPENHEIMER & CO INC 58,000 244,000 0.06%
91 Commonwealth Equity Services, Inc 57,771 243,000 0.05%
92 OFI Advisors LLC 55,966 236,000 0.05%
93 TEACHERS RETIREMENT SYSTEM OF THE STATE OF KENTUCKY 55,300 233,000 0.05%
94 GUGGENHEIM CAPITAL LLC 54,057 228,000 0.05%
95 Horizon Investments, LLC 53,681 226,000 0.05%
96 WealthTrust Axiom LLC 53,855 226,000 0.05%
97 FOUNDERS FINANCIAL SECURITIES LLC 53,189 224,000 0.05%
98 Jefferies Group LLC 52,698 222,000 0.05%
99 Verition Fund Management LLC 49,246 207,000 0.05%
100 GENERAL MOTORS INVESTMENT MANAGEMENT CORP 46,523 196,000 0.04%
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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.