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

Institutional Holders (2015Q2)
Portfolio Summary: 225 Institutional holders with a total value of $2,599,749,140.
#
Manager Name
Shares
Value ($)
%
Options
Notes
1 PRIMECAP MANAGEMENT CO/CA/ 5,668,090 372,564,000 14.33%
2 VANGUARD GROUP INC 3,197,958 210,201,000 8.09%
3 Palo Alto Investors LP 2,742,305 180,252,000 6.93%
4 BlackRock Fund Advisors 2,374,488 156,075,000 6.00%
5 Essex Woodlands Management, Inc. 2,150,000 141,319,000 5.44%
6 Jackson Square Partners, LLC 1,828,984 120,219,000 4.62%
7 MACQUARIE GROUP LTD 1,202,570 79,045,000 3.04%
8 BLAIR WILLIAM & CO/IL 1,099,655 72,280,000 2.78%
9 BlackRock Institutional Trust Company, N.A. 970,826 63,812,000 2.45%
10 1832 Asset Management L.P. 894,500 57,386,000 2.21%
11 LORD, ABBETT & CO. LLC 796,980 52,385,000 2.02%
12 WELLINGTON MANAGEMENT GROUP LLP 767,723 50,463,000 1.94%
13 NEXT CENTURY GROWTH INVESTORS LLC 767,471 50,445,000 1.94%
14 NORGES BANK 765,302 50,303,000 1.93%
15 Bank of New York Mellon Corp 667,078 43,847,000 1.69%
16 ROYAL BANK OF CANADA 553,176 36,361,000 1.40%
17 NORTHERN TRUST CORP 474,433 31,185,000 1.20%
18 RENAISSANCE TECHNOLOGIES LLC 450,473 29,610,000 1.14%
19 Cortina Asset Management, LLC 435,978 28,657,000 1.10%
20 Cupps Capital Management, LLC 427,533 28,101,000 1.08%
21 MORGAN STANLEY 422,376 27,762,000 1.07%
22 ROCKEFELLER FINANCIAL SERVICES INC 360,108 23,670,000 0.91%
23 RUSSELL FRANK CO/ 316,576 20,808,000 0.80%
24 JANUS HENDERSON GROUP PLC 294,468 19,355,000 0.74%
25 BANK OF MONTREAL /CAN/ 269,469 17,713,000 0.68%
26 Portolan Capital Management, LLC 267,940 17,612,000 0.68%
27 DEUTSCHE BANK AG\ 265,838 17,472,000 0.67%
28 Stephens Investment Management Group LLC 258,715 17,005,000 0.65%
29 Apex Capital Management 255,663 16,805,000 0.65%
30 TEACHERS ADVISORS, LLC 251,863 16,555,000 0.64%
31 Nuveen Asset Management, LLC 247,180 16,247,000 0.62%
32 GEODE CAPITAL MANAGEMENT, LLC 236,802 15,564,000 0.60%
33 PRINCIPAL FINANCIAL GROUP INC 236,015 15,513,000 0.60%
34 CASTLEARK MANAGEMENT LLC 233,875 15,373,000 0.59%
35 TWO SIGMA INVESTMENTS, LP 233,609 15,355,000 0.59%
36 FRED ALGER MANAGEMENT, LLC 227,716 14,968,000 0.58%
37 PRUDENTIAL FINANCIAL INC 204,989 13,474,000 0.52%
38 BNP Paribas Asset Management Holding S.A. 197,054 12,952,000 0.50%
39 AMERIPRISE FINANCIAL INC 196,056 12,887,000 0.50%
40 PUBLIC EMPLOYEES RETIREMENT ASSOCIATION OF COLORADO 195,373 12,842,000 0.49%
41 MILLENNIUM MANAGEMENT LLC 185,920 12,221,000 0.47%
42 PRICE T ROWE ASSOCIATES INC /MD/ 183,650 12,071,000 0.46%
43 BlackRock Investment Management, LLC 157,811 10,373,000 0.40%
44 Nichols Asset Management LLC 154,014 10,123,000 0.39%
45 HIGHLAND CAPITAL MANAGEMENT LP 153,787 10,109,000 0.39%
46 TIAA CREF INVESTMENT MANAGEMENT LLC 150,080 9,865,000 0.38%
47 OBERWEIS ASSET MANAGEMENT INC/ 145,540 9,566,000 0.37%
48 FULLER & THALER ASSET MANAGEMENT, INC. 132,360 8,700,000 0.33%
49 CALIFORNIA PUBLIC EMPLOYEES RETIREMENT SYSTEM 121,900 8,012,000 0.31%
50 Invesco Ltd. 118,256 7,773,000 0.30%
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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.