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

Institutional Holders (2015Q4)
Portfolio Summary: 176 Institutional holders with a total value of $679,685,764.
#
Manager Name
Shares
Value ($)
%
Options
Notes
1 VANGUARD GROUP INC 2,506,162 66,589,000 9.80%
2 Highland Management Partners VII, LLC 1,374,500 36,521,000 5.37%
3 Granahan Investment Management, LLC 1,243,322 33,035,000 4.86%
4 MILLENNIUM MANAGEMENT LLC 943,911 25,080,000 3.69%
5 RENAISSANCE TECHNOLOGIES LLC 805,400 21,399,000 3.15%
6 BlackRock Fund Advisors 742,875 19,738,000 2.90%
7 BlackRock Institutional Trust Company, N.A. 715,638 19,015,000 2.80%
8 KINGDON CAPITAL MANAGEMENT, L.L.C. 630,000 16,739,000 2.46%
9 EMERALD MUTUAL FUND ADVISERS TRUST 601,571 15,984,000 2.35%
10 ACADIAN ASSET MANAGEMENT LLC 587,879 15,619,000 2.30%
11 EMERALD ADVISERS, LLC 586,823 15,592,000 2.29%
12 D. E. Shaw & Co., Inc. 550,776 14,634,000 2.15%
13 Allianz Asset Management GmbH 515,019 13,687,000 2.01%
14 BANK OF MONTREAL /CAN/ 485,193 12,892,000 1.90%
15 STATE STREET CORP 475,195 12,632,000 1.86%
16 Elk Creek Partners, LLC 471,012 12,515,000 1.84%
17 NORTH RUN CAPITAL, LP 450,000 11,957,000 1.76%
18 GILDER GAGNON HOWE & CO LLC 439,670 11,682,000 1.72%
19 UBS AM, a distinct business unit of UBS ASSET MANAGEMENT AMERICAS LLC 383,513 10,189,000 1.50%
20 MORGAN STANLEY 352,642 9,370,000 1.38%
21 Neuberger Berman Group LLC 326,853 8,684,000 1.28%
22 NORTHERN TRUST CORP 315,944 8,395,000 1.24%
23 Pier Capital, LLC 312,018 8,290,000 1.22%
24 TIAA CREF INVESTMENT MANAGEMENT LLC 295,274 7,845,000 1.15%
25 TEACHERS ADVISORS, LLC 286,990 7,625,000 1.12%
26 KOPP INVESTMENT ADVISORS LLC 284,695 7,564,000 1.11%
27 AWM Investment Company, Inc. 264,877 7,038,000 1.04%
28 BANK OF AMERICA CORP /DE/ 261,631 6,952,000 1.02%
29 WELLS FARGO & COMPANY/MN 257,320 6,838,000 1.01%
30 FULLER & THALER ASSET MANAGEMENT, INC. 240,850 6,399,000 0.94%
31 BOGLE INVESTMENT MANAGEMENT L P /DE/ 239,002 6,350,000 0.93%
32 LORD, ABBETT & CO. LLC 227,933 6,056,000 0.89%
33 AMERICAN CENTURY COMPANIES INC 227,180 6,036,000 0.89%
34 Weiss Multi-Strategy Advisers LLC 227,100 6,034,000 0.89%
35 PANAGORA ASSET MANAGEMENT INC 224,222 5,958,000 0.88%
36 QS Investors, LLC 221,070 5,874,000 0.86%
37 WESTFIELD CAPITAL MANAGEMENT CO LP 218,249 5,799,000 0.85%
38 AQR CAPITAL MANAGEMENT LLC 217,417 5,776,000 0.85%
39 Bank of New York Mellon Corp 213,677 5,677,000 0.84%
40 AMERIPRISE FINANCIAL INC 204,928 5,446,000 0.80%
41 DEUTSCHE BANK AG\ 194,316 5,159,000 0.76%
42 STATE OF WISCONSIN INVESTMENT BOARD 190,000 5,048,000 0.74%
43 Spark Investment Management LLC 180,700 4,801,000 0.71%
44 GEODE CAPITAL MANAGEMENT, LLC 164,510 4,370,000 0.64%
45 OBERWEIS ASSET MANAGEMENT INC/ 163,070 4,333,000 0.64%
46 CORNERSTONE CAPITAL MANAGEMENT HOLDINGS LLC. 159,952 4,250,000 0.63%
47 WELLINGTON MANAGEMENT GROUP LLP 152,311 4,047,000 0.60%
48 BLACKROCK ADVISORS LLC 139,662 3,711,000 0.55%
49 UNITED SERVICES AUTOMOBILE ASSOCIATION 139,566 3,708,000 0.55%
50 PRICE T ROWE ASSOCIATES INC /MD/ 139,164 3,698,000 0.54%
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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.