Dark
Light
System
Security
AMERICAN SCIENCE & ENGR INC
AMERICAN SCIENCE & ENGR INC . Institutional holdings reported to the SEC.

Institutional Holders (2014Q1)
Portfolio Summary: 118 Institutional holders with a total value of $414,400,513.
#
Manager Name
Shares
Value ($)
%
Options
Notes
1 PRICE T ROWE ASSOCIATES INC /MD/ 1,031,353 69,276,000 16.72%
2 VANGUARD GROUP INC 527,401 35,425,000 8.55%
3 BlackRock Fund Advisors 438,372 29,445,000 7.11%
4 AMERICAN CENTURY COMPANIES INC 406,651 27,315,000 6.59%
5 NUANCE INVESTMENTS, LLC 405,414 27,232,000 6.57%
6 RENAISSANCE TECHNOLOGIES LLC 389,113 26,137,000 6.31%
7 ROYCE & ASSOCIATES LP 325,397 21,857,000 5.27%
8 BlackRock Institutional Trust Company, N.A. 264,528 17,768,000 4.29%
9 DIMENSIONAL FUND ADVISORS LP 223,537 15,015,000 3.62%
10 AMERIPRISE FINANCIAL INC 214,744 14,425,000 3.48%
11 Boston Trust Walden Corp 203,099 13,643,000 3.29%
12 STATE STREET CORP 173,495 11,651,000 2.81%
13 NORTHERN TRUST CORP 110,549 7,426,000 1.79%
14 Bank of New York Mellon Corp 108,190 7,267,000 1.75%
15 DEPRINCE RACE & ZOLLO INC 99,947 6,713,000 1.62%
16 EAGLE BOSTON INVESTMENT MANAGEMENT INC 86,338 5,799,000 1.40%
17 GEODE CAPITAL MANAGEMENT, LLC 80,465 5,404,000 1.30%
18 NORGES BANK 69,512 4,669,000 1.13%
19 AQR CAPITAL MANAGEMENT LLC 56,700 3,809,000 0.92%
20 SMITH ASSET MANAGEMENT GROUP LP 55,435 3,724,000 0.90%
21 PRINCIPAL FINANCIAL GROUP INC 47,667 3,202,000 0.77%
22 TIAA CREF INVESTMENT MANAGEMENT LLC 47,426 3,186,000 0.77%
23 ING GROEP NV 47,900 3,143,000 0.76%
24 QS BATTERYMARCH FINANCIAL MANAGEMENT, INC 43,546 2,925,000 0.71%
25 Invesco Ltd. 32,235 2,165,000 0.52%
26 BlackRock Investment Management, LLC 31,300 2,102,000 0.51%
27 GOLDMAN SACHS GROUP INC 30,683 2,061,000 0.50%
28 CALIFORNIA PUBLIC EMPLOYEES RETIREMENT SYSTEM 24,800 1,665,000 0.40%
29 RHUMBLINE ADVISERS 24,632 1,655,000 0.40%
30 BlackRock Group LTD 23,780 1,598,000 0.39%
31 ALLIANCEBERNSTEIN L.P. 23,302 1,565,000 0.38%
32 WELLINGTON MANAGEMENT GROUP LLP 21,868 1,469,000 0.35%
33 CHARLES SCHWAB INVESTMENT MANAGEMENT INC 20,623 1,386,000 0.33%
34 GUGGENHEIM CAPITAL LLC 20,079 1,349,000 0.33%
35 NEW YORK STATE COMMON RETIREMENT FUND 19,772 1,328,000 0.32%
36 PRUDENTIAL FINANCIAL INC 18,447 1,239,000 0.30%
37 TWO SIGMA ADVISERS, LP 16,843 1,130,000 0.27%
38 Gotham Asset Management, LLC 16,794 1,128,000 0.27%
39 PUBLIC SECTOR PENSION INVESTMENT BOARD 15,848 1,065,000 0.26%
40 Sterneck Capital Management, LLC 15,101 1,014,000 0.24%
41 CALIFORNIA STATE TEACHERS RETIREMENT SYSTEM 14,840 997,000 0.24%
42 D. E. Shaw & Co., Inc. 14,679 986,000 0.24%
43 PARAMETRIC PORTFOLIO ASSOCIATES LLC 14,660 985,000 0.24%
44 TEACHERS ADVISORS, LLC 13,442 903,000 0.22%
45 BANK OF AMERICA CORP /DE/ 11,770 791,000 0.19%
46 STATE BOARD OF ADMINISTRATION OF FLORIDA RETIREMENT SYSTEM 11,081 744,000 0.18%
47 TWO SIGMA INVESTMENTS, LP 10,519 707,000 0.17%
48 BOGLE INVESTMENT MANAGEMENT L P /DE/ 10,434 700,000 0.17%
49 MORGAN STANLEY 8,870 596,000 0.14%
50 Sterling Capital Management LLC 8,545 574,000 0.14%
Page 1 of 3

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.