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AMERICAN SCIENCE & ENGR INC
AMERICAN SCIENCE & ENGR INC . Institutional holdings reported to the SEC.

Institutional Holders (2014Q4)
Portfolio Summary: 107 Institutional holders with a total value of $326,885,055.
#
Manager Name
Shares
Value ($)
%
Options
Notes
1 PRICE T ROWE ASSOCIATES INC /MD/ 1,142,783 59,310,000 18.14%
2 NUANCE INVESTMENTS, LLC 719,032 37,318,000 11.42%
3 VANGUARD GROUP INC 522,506 27,119,000 8.30%
4 BlackRock Fund Advisors 458,141 23,778,000 7.27%
5 AMERICAN CENTURY COMPANIES INC 434,443 22,548,000 6.90%
6 RENAISSANCE TECHNOLOGIES LLC 341,700 17,734,000 5.43%
7 ROYCE & ASSOCIATES LP 322,297 16,727,000 5.12%
8 DIMENSIONAL FUND ADVISORS LP 226,391 11,750,000 3.59%
9 BlackRock Institutional Trust Company, N.A. 218,348 11,332,000 3.47%
10 AMERIPRISE FINANCIAL INC 201,507 10,456,000 3.20%
11 DEPRINCE RACE & ZOLLO INC 194,162 10,077,000 3.08%
12 STATE STREET CORP 169,543 8,802,000 2.69%
13 ING GROEP NV 129,400 6,716,000 2.05%
14 Bank of New York Mellon Corp 104,439 5,420,000 1.66%
15 NORTHERN TRUST CORP 88,438 4,590,000 1.40%
16 EAGLE BOSTON INVESTMENT MANAGEMENT INC 70,211 3,643,000 1.11%
17 NORGES BANK 69,512 3,608,000 1.10%
18 CALIFORNIA PUBLIC EMPLOYEES RETIREMENT SYSTEM 64,900 3,146,000 0.96%
19 GEODE CAPITAL MANAGEMENT, LLC 59,936 3,110,000 0.95%
20 PRINCIPAL FINANCIAL GROUP INC 47,647 2,473,000 0.76%
21 TIAA CREF INVESTMENT MANAGEMENT LLC 33,674 1,748,000 0.53%
22 Invesco Ltd. 32,799 1,702,000 0.52%
23 BlackRock Group LTD 32,753 1,699,000 0.52%
24 QS Investors, LLC 31,623 1,642,000 0.50%
25 BlackRock Investment Management, LLC 29,646 1,539,000 0.47%
26 CHARLES SCHWAB INVESTMENT MANAGEMENT INC 29,152 1,513,000 0.46%
27 RHUMBLINE ADVISERS 21,631 1,123,000 0.34%
28 DEUTSCHE BANK AG\ 20,526 1,064,000 0.33%
29 New Jersey Better Educational Savings Trust 20,000 1,038,000 0.32%
30 Aristotle Capital Boston, LLC 19,733 1,024,000 0.31%
31 PARAMETRIC PORTFOLIO ASSOCIATES LLC 19,305 1,002,000 0.31%
32 NEW YORK STATE COMMON RETIREMENT FUND 18,872 979,000 0.30%
33 ALLIANCEBERNSTEIN L.P. 17,959 932,000 0.29%
34 PRUDENTIAL FINANCIAL INC 17,552 911,000 0.28%
35 GUGGENHEIM CAPITAL LLC 16,212 843,000 0.26%
36 COMERICA BANK 15,464 802,000 0.25%
37 PUBLIC SECTOR PENSION INVESTMENT BOARD 14,898 773,000 0.24%
38 CALIFORNIA STATE TEACHERS RETIREMENT SYSTEM 14,584 757,000 0.23%
39 MORGAN STANLEY 14,487 751,000 0.23%
40 SUSQUEHANNA INTERNATIONAL GROUP, LLP 12,900 670,000 0.20% Put
41 STIFEL FINANCIAL CORP 12,850 667,000 0.20%
42 CITADEL ADVISORS LLC 12,574 653,000 0.20%
43 TEACHERS ADVISORS, LLC 11,501 597,000 0.18%
44 STATE BOARD OF ADMINISTRATION OF FLORIDA RETIREMENT SYSTEM 11,237 583,000 0.18%
45 I.G. INVESTMENT MANAGEMENT, LTD. 11,150 579,000 0.18%
46 AQR CAPITAL MANAGEMENT LLC 11,027 572,000 0.17%
47 TWO SIGMA INVESTMENTS, LP 10,484 544,000 0.17%
48 TWO SIGMA ADVISERS, LP 10,343 537,000 0.16%
49 SUSQUEHANNA INTERNATIONAL GROUP, LLP 9,999 519,000 0.16%
50 TD ASSET MANAGEMENT INC 9,000 467,000 0.14%
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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.