Dark
Light
System
Security
Corp Executive Board Co
Corp Executive Board Co. Institutional holdings reported to the SEC.

Institutional Holders (2014Q3)
Portfolio Summary: 179 Institutional holders with a total value of $2,014,027,186.
#
Manager Name
Shares
Value ($)
%
Options
Notes
1 TimesSquare Capital Management, LLC 2,489,979 149,573,000 7.43%
2 VANGUARD GROUP INC 2,063,828 123,974,000 6.16%
3 KORNITZER CAPITAL MANAGEMENT INC /KS 1,674,936 100,613,000 5.00%
4 MORGAN STANLEY 1,602,482 96,260,000 4.78%
5 BlackRock Fund Advisors 1,472,402 88,447,000 4.39%
6 JANUS HENDERSON INVESTORS US LLC 1,234,765 74,172,000 3.68%
7 STATE STREET CORP 1,158,807 69,603,000 3.46%
8 Bares Capital Management, Inc. 981,791 58,976,000 2.93%
9 ArrowMark Colorado Holdings LLC 966,440 58,054,000 2.88%
10 BlackRock Institutional Trust Company, N.A. 953,361 57,268,000 2.84%
11 Bank of New York Mellon Corp 928,565 55,778,000 2.77%
12 Burgundy Asset Management Ltd. 884,384 53,125,000 2.64%
13 DISCIPLINED GROWTH INVESTORS INC /MN 878,623 52,779,000 2.62%
14 BLAIR WILLIAM & CO/IL 786,652 47,254,000 2.35%
15 KAYNE ANDERSON RUDNICK INVESTMENT MANAGEMENT LLC 761,419 45,738,000 2.27%
16 JENNISON ASSOCIATES LLC 752,321 45,192,000 2.24%
17 GW&K Investment Management, LLC 721,038 43,313,000 2.15%
18 FMR LLC 614,437 36,909,000 1.83%
19 Van Berkom & Associates Inc. 613,733 36,867,000 1.83%
20 NORTHERN TRUST CORP 601,092 36,107,000 1.79%
21 BROWN ADVISORY INC 577,186 34,672,000 1.72%
22 DIMENSIONAL FUND ADVISORS LP 541,394 32,523,000 1.61%
23 PRICE T ROWE ASSOCIATES INC /MD/ 506,102 30,402,000 1.51%
24 Stephens Investment Management Group LLC 485,629 29,172,000 1.45%
25 WASATCH ADVISORS LP 478,611 28,750,000 1.43%
26 WELLS FARGO & COMPANY/MN 442,298 26,569,000 1.32%
27 1832 Asset Management L.P. 403,575 24,265,000 1.20%
28 WESTFIELD CAPITAL MANAGEMENT CO LP 395,883 23,781,000 1.18%
29 KALMAR INVESTMENTS INC /DE/ 374,004 22,466,000 1.12%
30 TAMRO Capital Partners LLC 347,052 20,847,000 1.04%
31 ROYCE & ASSOCIATES LP 331,600 19,919,000 0.99%
32 LOOMIS SAYLES & CO L P 322,968 19,401,000 0.96%
33 NORGES BANK 304,834 18,311,000 0.91%
34 VOYA INVESTMENT MANAGEMENT LLC 304,562 18,294,000 0.91%
35 SCHWERIN BOYLE CAPITAL MANAGEMENT INC 298,800 17,949,000 0.89%
36 AMERIPRISE FINANCIAL INC 278,299 16,716,000 0.83%
37 ATLANTA CAPITAL MANAGEMENT CO L L C 276,949 16,636,000 0.83%
38 MILLENNIUM MANAGEMENT LLC 259,853 15,609,000 0.78%
39 GUGGENHEIM CAPITAL LLC 223,597 13,431,000 0.67%
40 PRINCIPAL FINANCIAL GROUP INC 221,932 13,332,000 0.66%
41 GEODE CAPITAL MANAGEMENT, LLC 177,166 10,642,000 0.53%
42 TIAA CREF INVESTMENT MANAGEMENT LLC 175,172 10,523,000 0.52%
43 BlackRock Investment Management, LLC 174,205 10,464,000 0.52%
44 Retirement Systems of Alabama 140,382 8,433,000 0.42%
45 STIFEL FINANCIAL CORP 139,413 8,375,000 0.42%
46 PUBLIC EMPLOYEES RETIREMENT SYSTEM OF OHIO 134,754 8,095,000 0.40%
47 RENAISSANCE TECHNOLOGIES LLC 126,193 7,580,000 0.38%
48 CHARLES SCHWAB INVESTMENT MANAGEMENT INC 108,328 6,508,000 0.32%
49 MANAGED ACCOUNT ADVISORS LLC 107,748 6,473,000 0.32%
50 RUSSELL FRANK CO/ 99,832 5,997,000 0.30%
Page 1 of 4

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.