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

Institutional Holders (2017Q2)
Portfolio Summary: 45 Institutional holders with a total value of $17,439,623.
#
Manager Name
Shares
Value ($)
%
Options
Notes
1 Invesco Ltd. 1,308,364 5,692,000 32.64%
2 Gates Capital Management, Inc. 582,946 2,536,000 14.54%
3 VANGUARD GROUP INC 290,417 1,263,000 7.24%
4 DIMENSIONAL FUND ADVISORS LP 265,378 1,154,000 6.62%
5 RENAISSANCE TECHNOLOGIES LLC 232,782 1,013,000 5.81%
6 Neuberger Berman Group LLC 177,127 771,000 4.42%
7 BlackRock Finance, Inc. 174,652 760,000 4.36%
8 BRIDGEWAY CAPITAL MANAGEMENT, LLC 156,205 679,000 3.89%
9 JPMORGAN CHASE & CO 95,646 416,000 2.39%
10 Connor, Clark & Lunn Investment Management Ltd. 73,276 319,000 1.83%
11 ROYCE & ASSOCIATES LP 71,880 313,000 1.79%
12 WELLS FARGO & COMPANY/MN 70,095 305,000 1.75%
13 IMPAX ASSET MANAGEMENT LLC 50,000 218,000 1.25%
14 Spark Investment Management LLC 48,600 211,000 1.21%
15 GEODE CAPITAL MANAGEMENT, LLC 42,046 182,000 1.04%
16 JACOBS LEVY EQUITY MANAGEMENT, INC 40,988 178,000 1.02%
17 BROOKFIELD Corp /ON/ 37,750 164,000 0.94%
18 CALIFORNIA PUBLIC EMPLOYEES RETIREMENT SYSTEM 37,466 163,000 0.93%
19 WOLVERINE ASSET MANAGEMENT LLC 34,000 147,000 0.84% Put
20 ALGERT GLOBAL LLC 33,359 145,000 0.83%
21 State of New Jersey Common Pension Fund D 30,666 133,000 0.76%
22 OXFORD ASSET MANAGEMENT LLP 28,265 123,000 0.71%
23 NORTHERN TRUST CORP 27,843 121,000 0.69%
24 GOLDMAN SACHS GROUP INC 25,825 112,000 0.64%
25 Bank of New York Mellon Corp 20,914 90,000 0.52%
26 DUPONT CAPITAL MANAGEMENT CORP 14,266 62,000 0.36%
27 HighTower Advisors, LLC 13,333 58,000 0.33%
28 FIRST TRUST ADVISORS LP 10,000 44,000 0.25%
29 UBS Group AG 6,999 30,000 0.17%
30 Creative Planning 2,045 9,000 0.05%
31 BANK OF AMERICA CORP /DE/ 1,864 8,000 0.05%
32 Tower Research Capital LLC (TRC) 1,688 7,000 0.04%
33 SEI INVESTMENTS CO 943 4,000 0.02%
34 MORGAN STANLEY 887 4,000 0.02%
35 FEDERATED HERMES, INC. 427 2,000 0.01%
36 CUTLER GROUP LLC / CA 661 2,000 0.01%
37 LADENBURG THALMANN FINANCIAL SERVICES INC. 269 1,000 0.01%
38 NewEdge Advisors, LLC 166 623 0.00%
39 DEUTSCHE BANK AG\ 3 0 0.00%
40 Advisory Services Network, LLC 25 0 0.00%
41 US BANCORP \DE\ 6 0 0.00%
42 ROYAL BANK OF CANADA 13 0 0.00%
43 IFP ADVISORS, INC 32 0 0.00%
44 GLENMEDE TRUST CO NA 41 0 0.00%
45 BRONFMAN E.L. ROTHSCHILD, L.P. 95 0 0.00%

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.