Dark
Light
System
Security
SEATTLE GENETICS INC
SEATTLE GENETICS INC. Institutional holdings reported to the SEC.

Institutional Holders (2015Q1)
Portfolio Summary: 217 Institutional holders with a total value of $4,505,134,344.
#
Manager Name
Shares
Value ($)
%
Options
Notes
1 BAKER BROS. ADVISORS LP 28,876,712 1,020,792,000 22.66%
2 FMR LLC 18,647,727 659,197,000 14.63%
3 BAILLIE GIFFORD & CO 15,253,520 539,213,000 11.97%
4 PRIMECAP MANAGEMENT CO/CA/ 11,836,575 418,423,000 9.29%
5 VANGUARD GROUP INC 6,135,243 216,881,000 4.81%
6 WASATCH ADVISORS LP 3,462,749 122,408,000 2.72%
7 COLUMBIA WANGER ASSET MANAGEMENT LLC 3,408,200 120,480,000 2.67%
8 FIRST TRUST ADVISORS LP 3,064,329 108,324,000 2.40%
9 PRICE T ROWE ASSOCIATES INC /MD/ 2,689,572 95,076,000 2.11%
10 BlackRock Institutional Trust Company, N.A. 2,546,378 90,014,000 2.00%
11 BlackRock Fund Advisors 2,500,648 88,398,000 1.96%
12 STATE STREET CORP 1,727,394 61,063,000 1.36%
13 OppenheimerFunds, Inc. 1,400,000 49,490,000 1.10%
14 Invesco Ltd. 1,384,942 48,958,000 1.09%
15 PINNACLE ASSOCIATES LTD 1,372,371 48,513,000 1.08%
16 SECTORAL ASSET MANAGEMENT INC 1,260,275 44,551,000 0.99%
17 UBS AM, a distinct business unit of UBS ASSET MANAGEMENT AMERICAS LLC 1,146,593 40,532,000 0.90%
18 MORGAN STANLEY 1,096,681 38,768,000 0.86%
19 Redmile Group, LLC 1,052,666 37,212,000 0.83%
20 NORGES BANK 931,041 32,912,000 0.73%
21 EAGLE ASSET MANAGEMENT INC 836,723 29,578,000 0.66%
22 Mitsubishi UFJ Trust & Banking Corp 787,430 27,836,000 0.62%
23 MILLENNIUM MANAGEMENT LLC 785,805 27,778,000 0.62%
24 WELLINGTON MANAGEMENT GROUP LLP 651,898 23,045,000 0.51%
25 BLAIR WILLIAM & CO/IL 619,086 21,884,000 0.49%
26 Lagoda Investment Management, L.P. 617,204 21,818,000 0.48%
27 DEUTSCHE BANK AG\ 580,221 20,508,000 0.46%
28 GEODE CAPITAL MANAGEMENT, LLC 566,979 20,042,000 0.44%
29 THORNBURG INVESTMENT MANAGEMENT INC 519,376 18,360,000 0.41%
30 MANNING & NAPIER ADVISORS LLC 492,690 17,415,000 0.39%
31 AXA S.A. 470,714 16,640,000 0.37%
32 NORTHERN TRUST CORP 414,658 14,659,000 0.33%
33 Bank of New York Mellon Corp 392,043 13,858,000 0.31%
34 BANK OF AMERICA CORP /DE/ 383,474 13,555,000 0.30%
35 TIAA CREF INVESTMENT MANAGEMENT LLC 339,717 12,009,000 0.27%
36 GOLDMAN SACHS GROUP INC 323,639 11,441,000 0.25%
37 BARCLAYS PLC 306,100 10,714,000 0.24% Put
38 GUGGENHEIM CAPITAL LLC 291,533 10,306,000 0.23%
39 CREDIT SUISSE AG/ 280,307 9,908,000 0.22%
40 VOYA INVESTMENT MANAGEMENT LLC 278,290 9,838,000 0.22%
41 IRONBRIDGE CAPITAL MANAGEMENT LP 268,155 9,479,000 0.21%
42 ROYAL BANK OF CANADA 238,243 8,422,000 0.19%
43 BLACKROCK ADVISORS LLC 231,156 8,171,000 0.18%
44 Jupiter Investment Management Ltd 221,848 7,842,000 0.17%
45 SUSQUEHANNA INTERNATIONAL GROUP, LLP 220,044 7,779,000 0.17%
46 CALIFORNIA PUBLIC EMPLOYEES RETIREMENT SYSTEM 233,400 7,749,000 0.17%
47 BARCLAYS PLC 218,388 7,644,000 0.17%
48 SUSQUEHANNA INTERNATIONAL GROUP, LLP 216,000 7,636,000 0.17% Put
49 SPHERA FUNDS MANAGEMENT LTD. 200,000 7,070,000 0.16%
50 CALIFORNIA STATE TEACHERS RETIREMENT SYSTEM 185,274 6,549,000 0.15%
Page 1 of 5

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.