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GIGAMON INC
GIGAMON INC. Institutional holdings reported to the SEC.

Institutional Holders (2015Q1)
Portfolio Summary: 116 Institutional holders with a total value of $471,426,494.
#
Manager Name
Shares
Value ($)
%
Options
Notes
1 Highland Management Partners VII, LLC 4,274,500 90,790,000 19.26%
2 NORTH RUN CAPITAL, LP 1,800,000 38,232,000 8.11%
3 Granahan Investment Management, LLC 1,517,112 32,223,000 6.84%
4 VANGUARD GROUP INC 1,368,804 29,074,000 6.17%
5 RUBRIC CAPITAL MANAGEMENT, LLC 1,042,800 22,149,000 4.70%
6 KINGDON CAPITAL MANAGEMENT, L.L.C. 914,586 19,426,000 4.12%
7 MILLENNIUM MANAGEMENT LLC 779,716 16,561,000 3.51%
8 BlackRock Fund Advisors 673,295 14,301,000 3.03%
9 MORGAN STANLEY 607,224 12,898,000 2.74%
10 Neuberger Berman Group LLC 573,238 12,176,000 2.58%
11 QUENTEC ASSET MANAGEMENT LLC 519,627 11,037,000 2.34%
12 BlackRock Institutional Trust Company, N.A. 469,596 9,974,000 2.12%
13 AWM Investment Company, Inc. 468,966 9,961,000 2.11%
14 EMERALD ADVISERS, LLC 255,570 7,782,000 1.65%
15 Alyeska Investment Group, L.P. 346,847 7,367,000 1.56%
16 STATE STREET CORP 343,687 7,296,000 1.55%
17 GILDER GAGNON HOWE & CO LLC 325,556 6,915,000 1.47%
18 CASTLEARK MANAGEMENT LLC 320,675 6,811,000 1.44%
19 D. E. Shaw & Co., Inc. 316,995 6,733,000 1.43%
20 EMERALD MUTUAL FUND ADVISERS TRUST 208,224 6,340,000 1.34%
21 FULLER & THALER ASSET MANAGEMENT, INC. 296,300 6,293,000 1.33%
22 NORTHERN TRUST CORP 266,355 5,657,000 1.20%
23 G2 Investment Partners Management LLC 236,538 5,024,000 1.07%
24 Informed Momentum Co LLC 230,260 4,891,000 1.04%
25 STATE OF WISCONSIN INVESTMENT BOARD 213,000 4,524,000 0.96%
26 RENAISSANCE TECHNOLOGIES LLC 210,300 4,467,000 0.95%
27 Bank of New York Mellon Corp 199,890 4,246,000 0.90%
28 Nuveen Asset Management, LLC 196,699 4,178,000 0.89%
29 INSIGHT CAPITAL RESEARCH & MANAGEMENT INC 164,444 3,493,000 0.74%
30 HARBER ASSET MANAGEMENT LLC 162,939 3,461,000 0.73%
31 UNITED SERVICES AUTOMOBILE ASSOCIATION 151,866 3,226,000 0.68%
32 CITADEL ADVISORS LLC 133,865 2,843,000 0.60%
33 DRIEHAUS CAPITAL MANAGEMENT LLC 130,700 2,776,000 0.59%
34 GEODE CAPITAL MANAGEMENT, LLC 122,569 2,603,000 0.55%
35 TIAA CREF INVESTMENT MANAGEMENT LLC 108,205 2,298,000 0.49%
36 Nine Chapters Capital Management LLC 101,000 2,145,000 0.46%
37 RUSSELL FRANK CO/ 93,884 1,994,000 0.42%
38 DEUTSCHE BANK AG\ 82,262 1,745,000 0.37%
39 Employees Retirement System of Texas 79,000 1,678,000 0.36%
40 KOPP INVESTMENT ADVISORS LLC 75,480 1,603,000 0.34%
41 JPMORGAN CHASE & CO 75,094 1,595,000 0.34%
42 CHARLES SCHWAB INVESTMENT MANAGEMENT INC 74,990 1,593,000 0.34%
43 BlackRock Investment Management, LLC 70,939 1,507,000 0.32%
44 FIRST MANHATTAN CO. LLC. 62,200 1,321,000 0.28%
45 PARAMETRIC PORTFOLIO ASSOCIATES LLC 61,833 1,313,000 0.28%
46 HIGHBRIDGE CAPITAL MANAGEMENT LLC 58,753 1,248,000 0.26%
47 AMERIPRISE FINANCIAL INC 57,065 1,212,000 0.26%
48 ESSEX INVESTMENT MANAGEMENT CO LLC 54,678 1,161,000 0.25%
49 PRICE T ROWE ASSOCIATES INC /MD/ 53,414 1,135,000 0.24%
50 CADENCE CAPITAL MANAGEMENT LLC 53,410 1,134,000 0.24%
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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.