BIOGEN INC

Ticker: BIIB CUSIP: 09062X103 Class: COM

Note: Option positions (PUT/CALL) are excluded.

InstitutionSharesValue ($000)
VANGUARD GROUP INC17,447,092$3,070,514
BlackRock, Inc.14,811,370$2,606,653
PRIMECAP MANAGEMENT CO/CA/14,757,997$2,597,260
FMR LLC9,425,863$1,658,857
STATE STREET CORP7,159,020$1,259,916
GEODE CAPITAL MANAGEMENT, LLC4,199,399$736,435
WELLINGTON MANAGEMENT GROUP LLP3,551,269$624,988
Point72 Asset Management, L.P.2,813,192$495,094
NORGES BANK2,638,834$464,408
MORGAN STANLEY2,325,013$409,180
JPMORGAN CHASE & CO1,857,262$326,860
Boston Partners1,720,595$302,815
Invesco Ltd.1,655,441$291,341
AQR CAPITAL MANAGEMENT LLC1,528,616$269,021
Legal & General Group Plc1,459,597$256,874
NORTHERN TRUST CORP1,446,126$254,504
UBS ASSET MANAGEMENT AMERICAS INC1,391,370$244,867
BARCLAYS PLC1,305,007$229,668
Pacer Advisors, Inc.1,145,890$201,665
CHARLES SCHWAB INVESTMENT MANAGEMENT INC1,143,902$201,315
BANK OF AMERICA CORP /DE/1,128,845$198,665
MILLENNIUM MANAGEMENT LLC1,125,586$198,092
GOLDMAN SACHS GROUP INC1,099,366$193,477
VAN ECK ASSOCIATES CORP1,065,616$188
Alyeska Investment Group, L.P.1,024,268$180,261
DIMENSIONAL FUND ADVISORS LP960,645$169,066
DEUTSCHE BANK AG\953,728$167,847
Pictet Asset Management Holding SA947,494$166,900
Bank of New York Mellon Corp811,106$142,747
FRED ALGER MANAGEMENT, LLC798,774$140,576
PRICE T ROWE ASSOCIATES INC /MD/792,071$139
T. Rowe Price Investment Management, Inc.778,461$137
MASSACHUSETTS FINANCIAL SERVICES CO /MA/712,559$125,403
Employees Provident Fund Board704,196$123,931
SUSQUEHANNA INTERNATIONAL GROUP, LLP661,684$116,450
UBS Group AG641,788$112,948
Robeco Institutional Asset Management B.V.610,908$107,514
BALYASNY ASSET MANAGEMENT L.P.607,953$106,994
CAISSE DE DEPOT ET PLACEMENT DU QUEBEC588,545$103,578
Patient Capital Management, LLC576,352$101,432
CITIGROUP INC573,844$100,991
Amundi572,429$100,742
FIRST TRUST ADVISORS LP565,847$99,583
ROYAL BANK OF CANADA541,825$95,356
CAUSEWAY CAPITAL MANAGEMENT LLC521,101$91,709
BNP PARIBAS ARBITRAGE, SA508,067$89,415
HSBC HOLDINGS PLC503,832$88,838
AustralianSuper Pty Ltd476,812$83,914
Zurcher Kantonalbank (Zurich Cantonalbank)452,442$79,625
Swiss National Bank401,800$70,713
RENAISSANCE TECHNOLOGIES LLC399,196$70,255
MARSHALL WACE, LLP385,928$67,919
HRT FINANCIAL LP384,265$68
Nuveen, LLC375,557$66,094
Sumitomo Mitsui Trust Holdings, Inc.370,627$65,227
PRUDENTIAL FINANCIAL INC353,493$62,211
Jain Global LLC353,173$62,155
Man Group plc339,284$59,711
CALIFORNIA PUBLIC EMPLOYEES RETIREMENT SYSTEM330,806$58,219
Candriam S.C.A.330,472$58,162
Mitsubishi UFJ Kokusai Asset Management Co., Ltd.319,909$56,886
FIL Ltd319,544$56,237
LSV ASSET MANAGEMENT316,815$56
ADAGE CAPITAL PARTNERS GP, L.L.C.294,357$51,804
Fisher Asset Management, LLC293,269$51,613
GLENVIEW CAPITAL MANAGEMENT, LLC290,605$51,144
National Pension Service287,238$50,551
Gotham Asset Management, LLC276,809$48,716
RHUMBLINE ADVISERS271,746$47,824
KAMES CAPITAL plc260,162$45,786
TWO SIGMA INVESTMENTS, LP251,763$44,308
Allianz Asset Management GmbH247,722$43,597
VICTORY CAPITAL MANAGEMENT INC246,650$43,408
BNP Paribas Investment Partners S.A.245,680$43
Swedbank AB231,609$40,761
THOMPSON SIEGEL & WALMSLEY LLC228,807$40
Artemis Investment Management LLP226,845$39,922
CALIFORNIA STATE TEACHERS RETIREMENT SYSTEM226,380$39,841
Hudson Bay Capital Management LP221,860$39,045
LOS ANGELES CAPITAL MANAGEMENT LLC205,140$30,691
Logos Global Management LP200,000$35,198
KLP KAPITALFORVALTNING AS191,677$33,733
Freestone Grove Partners LP187,608$33,017
ACADIAN ASSET MANAGEMENT LLC187,457$33
PRINCIPAL FINANCIAL GROUP INC184,189$32,415
SG Americas Securities, LLC183,829$32
ALLIANCEBERNSTEIN L.P.183,744$32,337
Palo Alto Investors LP183,571$32,307
Defilade Capital Management, L.P.161,992$28,509
NOMURA HOLDINGS INC147,261$25,916
BANCO BILBAO VIZCAYA ARGENTARIA, S.A.146,951$25,863
Squarepoint Ops LLC146,408$25,766
FRANKLIN RESOURCES INC141,374$24,880
abrdn plc139,878$24,617
IEQ CAPITAL, LLC139,639$24,575
CANADA PENSION PLAN INVESTMENT BOARD138,078$24,300
TD Asset Management Inc135,352$23,821
Y-Intercept (Hong Kong) Ltd134,566$23,682
SUVRETTA CAPITAL MANAGEMENT, LLC132,290$23,282
AMERIPRISE FINANCIAL INC131,761$23,188
880 other institutions11,693,016$1,877,915
Total (980 institutions)139,267,151$23,587,147