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

Institutional Holders (2014Q1)
Portfolio Summary: 114 Institutional holders with a total value of $627,769,268.
#
Manager Name
Shares
Value ($)
%
Options
Notes
1 Highland Management Partners VII, LLC 5,774,500 175,487,000 27.95%
2 GILDER GAGNON HOWE & CO LLC 1,814,419 55,140,000 8.78%
3 JPMORGAN CHASE & CO 1,659,547 50,433,000 8.03%
4 VANGUARD GROUP INC 993,912 30,205,000 4.81%
5 Cortina Asset Management, LLC 938,306 28,515,000 4.54%
6 Shannon River Fund Management LLC 901,000 27,381,000 4.36%
7 Granahan Investment Management, LLC 858,100 26,078,000 4.15%
8 NEXT CENTURY GROWTH INVESTORS LLC 706,377 21,466,000 3.42%
9 Polar Capital LLP 519,094 15,772,000 2.51%
10 LOOMIS SAYLES & CO L P 508,916 15,466,000 2.46%
11 WELLS FARGO & COMPANY/MN 494,928 15,040,000 2.40%
12 THORNBURG INVESTMENT MANAGEMENT INC 355,032 10,789,000 1.72%
13 EMERALD ADVISERS, LLC 344,642 10,474,000 1.67%
14 TEACHERS ADVISORS, LLC 300,230 9,124,000 1.45%
15 Cupps Capital Management, LLC 298,461 9,070,000 1.44%
16 EMERALD MUTUAL FUND ADVISERS TRUST 289,530 8,799,000 1.40%
17 WALL STREET ASSOCIATES 259,411 7,884,000 1.26%
18 CADENCE CAPITAL MANAGEMENT LLC 246,428 7,489,000 1.19%
19 WELLINGTON MANAGEMENT GROUP LLP 246,235 7,483,000 1.19%
20 DRIEHAUS CAPITAL MANAGEMENT LLC 205,258 6,238,000 0.99%
21 BlackRock Fund Advisors 194,599 5,914,000 0.94%
22 Bank of New York Mellon Corp 177,283 5,387,000 0.86%
23 SUSQUEHANNA INTERNATIONAL GROUP, LLP 162,000 4,923,000 0.78% Call
24 MORGAN STANLEY 145,043 4,408,000 0.70%
25 FMR LLC 143,300 4,355,000 0.69%
26 PEAK6 Group LLC 124,500 3,784,000 0.60% Call
27 NORTHERN TRUST CORP 117,089 3,558,000 0.57%
28 Tygh Capital Management, Inc. 113,263 3,442,000 0.55%
29 STATE STREET CORP 109,388 3,320,000 0.53%
30 CITADEL ADVISORS LLC 90,245 2,742,000 0.44%
31 BlackRock Institutional Trust Company, N.A. 88,646 2,694,000 0.43%
32 Lisanti Capital Growth, LLC 86,175 2,619,000 0.42%
33 BANK OF AMERICA CORP /DE/ 84,555 2,569,000 0.41%
34 TIAA CREF INVESTMENT MANAGEMENT LLC 79,920 2,429,000 0.39%
35 Allianz Asset Management GmbH 75,000 2,279,000 0.36%
36 UNITED SERVICES AUTOMOBILE ASSOCIATION 68,700 2,088,000 0.33%
37 GEODE CAPITAL MANAGEMENT, LLC 64,679 1,965,000 0.31%
38 RUSSELL FRANK CO/ 99,501 1,603,000 0.26%
39 Open Field Capital LLC 50,000 1,520,000 0.24%
40 MILLENNIUM MANAGEMENT LLC 43,296 1,316,000 0.21%
41 OBERWEIS ASSET MANAGEMENT INC/ 41,500 1,261,000 0.20%
42 QS BATTERYMARCH FINANCIAL MANAGEMENT, INC 38,300 1,164,000 0.19%
43 JANE STREET GROUP, LLC 37,130 1,128,000 0.18%
44 CREDIT SUISSE AG/ 34,107 1,037,000 0.17%
45 Parallax Volatility Advisers, L.P. 30,400 924,000 0.15% Call
46 TIGER MANAGEMENT L.L.C. 28,500 866,000 0.14%
47 Invesco Ltd. 27,364 832,000 0.13%
48 SUSQUEHANNA INTERNATIONAL GROUP, LLP 27,300 830,000 0.13% Put
49 Sterling Capital Management LLC 26,327 800,000 0.13%
50 TUDOR INVESTMENT CORP ET AL 26,339 800,000 0.13%
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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.