13F

Stock

Alnylam Pharmaceuticals, Inc.

ALNY · held by 895 managers

Reported value

$50.9B

Holders

895

+7 new · −9 exited

Holders’ est. mark

$172.2M

Price effect on 11 books still in the name

Largest holder

$6.48B

Capital World Investors

Notable conviction

Share of each notable manager’s 13F book.

Holder count by quarter

Who holds it

Notable only
InvestorSharesValueEst. markChange
Capital World Investors16.3M$6.48BHeld
Fidelity35.4M$6.35BHeld
Vanguard13.6M$5.39BHeld
BlackRock, Inc.23.5M$4.16BHeld
Capital Research Global Investors6.78M$2.7BHeld
JPMORGAN CHASE & CO5.92M$1.88BHeld
State Street25.1M$1.32BHeld
GEODE CAPITAL MANAGEMENT, LLC2.65M$1.06BHeld
BAILLIE GIFFORD & CO2.6M$1.03BHeld
Amundi5.61M$977.3MHeld
NORGES BANK2.25M$895.8M$272.6MAdded$319M
Invesco Ltd.4.67M$864.9MHeld
Dodge & Cox1.96M$781.1MHeld
WELLINGTON MANAGEMENT GROUP LLP1.63M$647.7MHeld
Orbis Allan Gray Ltd1.62M$643.5MHeld
AMERICAN CENTURY COMPANIES INC1.49M$590.6MHeld
TWO SIGMA ADVISERS, LP1.13M$450.4MHeld
ARROWSTREET CAPITAL, LIMITED PARTNERSHIP1.13M$448.2MHeld
MORGAN STANLEY1.09M$386M−$74MAdded$54.9M
Legal & General Group Plc961.5K$382.3MHeld
Icahn Capital920K$365.8MHeld
NORTHERN TRUST CORP857.7K$341.1MHeld
UBS Group AG826.5K$328.4MHeld
FRANKLIN RESOURCES INC3.02M$316.5MHeld
Qube Research & Technologies Ltd774.7K$308MHeld
VOYA INVESTMENT MANAGEMENT LLC140M$284.9MHeld
DEUTSCHE BANK AG\712K$283.1MHeld
BANK OF AMERICA CORP /DE/690.2K$272.5M−$26.4MCut−$411M
UBS AM, a distinct business unit of UBS ASSET MANAGEMENT AMERICAS LLC652.4K$259.4MHeld
CHARLES SCHWAB INVESTMENT MANAGEMENT INC647.8K$257.6MHeld
FEDERATED HERMES, INC.628.1K$249.7MHeld
TWO SIGMA INVESTMENTS, LP616.1K$245MHeld
Clearbridge Investments, LLC597K$237.4MHeld
ROYAL BANK OF CANADA591.5K$235.2MHeld
Nuveen, LLC565.8K$225MHeld
MARSHALL WACE, LLP549.9K$218.7MHeld
Bank of New York Mellon Corp504.1K$200.5MHeld
LOOMIS SAYLES & CO L P497.9K$198MHeld
MASSACHUSETTS FINANCIAL SERVICES CO /MA/495.3K$197MHeld
BNP PARIBAS FINANCIAL MARKETS17.7M$180.3MHeld
Bellevue Group AG445.9K$177.3MHeld
D. E. Shaw & Co., Inc.444.5K$176.8MHeld
1832 Asset Management L.P.440.1K$175MHeld
JACOBS LEVY EQUITY MANAGEMENT, INC401.4K$159.6MHeld
RAYMOND JAMES FINANCIAL INC388.7K$154.4MHeld
GOLDMAN SACHS GROUP INC1.79M$151.3MHeld
Swiss National Bank359.2K$142.8MHeld
Squarepoint Ops LLC351K$139.6MHeld
WORLDQUANT MILLENNIUM ADVISORS LLC343.4K$136.6MHeld
Sumitomo Mitsui Trust Group, Inc.327.8K$130.3MHeld
NOMURA ASSET MANAGEMENT INTERNATIONAL INC.2.4M$127MHeld
GILDER GAGNON HOWE & CO LLC319.3K$127MHeld
Pictet Asset Management Holding SA316.1K$125.8MHeld
JANE STREET GROUP, LLC311.3K$123.8MHeld
DIMENSIONAL FUND ADVISORS LP301.9K$120MHeld
ORBIMED ADVISORS LLC288.8K$114.8MHeld
Allspring Global Investments Holdings, LLC278.7K$111.5MHeld
JENNISON ASSOCIATES LLC277.8K$110.5MHeld
LOS ANGELES CAPITAL MANAGEMENT LLC240.1K$107.9MHeld
CONGRESS ASSET MANAGEMENT CO269.2K$107.1MHeld
TD Asset Management Inc269.1K$107MHeld
WELLS FARGO & COMPANY/MN1.69M$104.6MHeld
CANADA PENSION PLAN INVESTMENT BOARD258.7K$102.9MHeld
FIRST TRUST ADVISORS LP257K$102.2MHeld
ROYAL LONDON ASSET MANAGEMENT LTD253.1K$100.6MHeld
Polar Capital Holdings Plc240.6K$95.7MHeld
California Public Employees Retirement System237K$94.2MHeld
Candriam S.C.A.224.3K$89.2MHeld
BARCLAYS PLC249.6K$88.5M−$9.56MAdded$45.5M
VICTORY CAPITAL MANAGEMENT INC220.9K$87.8MHeld
FengHe Fund Management Pte. Ltd.218.7K$87MHeld
ProShare Advisors LLC211.1K$83.9MHeld
CALIFORNIA STATE TEACHERS RETIREMENT SYSTEM201.8K$80.3MHeld
CIBC Private Wealth Group LLC200.4K$79.7MHeld
RHUMBLINE ADVISERS195.3K$77.6MHeld
SUSQUEHANNA INTERNATIONAL GROUP, LLP191.8K$76.3MHeld
Korea Investment CORP189.8K$75.5MHeld
AMERIPRISE FINANCIAL INC181.1K$72MHeld
CITIGROUP INC791.6K$69.5MHeld
National Pension Service168.1K$66.9MHeld
Russell Investments Group, Ltd.165.7K$65.9MHeld
VOLORIDGE INVESTMENT MANAGEMENT, LLC160.6K$63.9MHeld
SCS Capital Management LLC149.6K$59.5MHeld
Robeco Institutional Asset Management B.V.144.7K$57.5MHeld
Man Group plc144.2K$57.3MHeld
Universal- Beteiligungs- und Servicegesellschaft mbH4.67M$56.1MHeld
Mitsubishi UFJ Asset Management Co., Ltd.138.8K$55.5MHeld
JANUS HENDERSON GROUP PLC136.4K$54.3MHeld
MANUFACTURERS LIFE INSURANCE COMPANY, THE18.9M$52.9MHeld
Aberdeen Group plc132.8K$52.8MHeld
ENVESTNET ASSET MANAGEMENT INC120.5K$47.9MHeld
CAPITAL INTERNATIONAL SARL119.4K$47.5MHeld
NEUBERGER BERMAN GROUP LLC115.2K$45.8MHeld
STATE BOARD OF ADMINISTRATION OF FLORIDA RETIREMENT SYSTEM114.6K$45.6MHeld
SEI INVESTMENTS CO362.1K$44.6MHeld
AVIVA PLC110.7K$44MHeld
TREMBLANT CAPITAL GROUP110.1K$43.8MHeld
HighTower Advisors, LLC106.5K$42.3MHeld
Alberta Investment Management Corp25M$41.9M−$4.71MCut−$4.71M
PINEBRIDGE INVESTMENTS LLC100.2K$39.8MHeld
NOMURA ASSET MANAGEMENT CO LTD94.3K$37.5MHeld
FIL Ltd94.2K$37.4MHeld
WESTFIELD CAPITAL MANAGEMENT CO LP93.4K$37.2MHeld
Zurcher Kantonalbank (Zurich Cantonalbank)89.8K$35.7MHeld
HSBC HOLDINGS PLC89.5K$35.7MHeld
Life Cycle Investment Partners Ltd88.1K$35MHeld
Bridgewater85.6K$34MHeld
Hudson Bay Capital Management LP85K$33.8M−$549.1KAdded$29.5M
MIRAE ASSET GLOBAL ETFS HOLDINGS Ltd.80.1K$31.9MHeld
Mitsubishi UFJ Trust & Banking Corp79.4K$31.6MHeld
Boussard & Gavaudan Investment Management LLP21K$30.9MHeld
STATE OF WISCONSIN INVESTMENT BOARD3.07M$30.7MHeld
MILLENNIUM MANAGEMENT LLC75.4K$30MHeld
Casdin Capital, LLC75K$29.8MHeld
STOREBRAND ASSET MANAGEMENT AS74.8K$29.7MHeld
Rock Springs Capital Management LP71.3K$28.3MHeld
Fiera Capital Corp70.7K$28.1MHeld
Soleus Capital Management, L.P.70K$27.8MHeld
Driehaus Capital Management LLC69.8K$27.7MHeld
SCHRODER INVESTMENT MANAGEMENT GROUP68K$27MHeld
DEERFIELD MANAGEMENT COMPANY, L.P.67.9K$27MHeld
CAPITAL INTERNATIONAL LTD /CA/67.7K$26.9MHeld
DANSKE BANK A/S67.2K$26.7M$3.94MAdded$8.79M
NATIONAL BANK OF CANADA /FI/66.4K$26.4MHeld
Skandinaviska Enskilda Banken AB (publ)66.2K$26.3MHeld
Asset Management One Co., Ltd.65.2K$26MHeld
IEQ CAPITAL, LLC64.9K$25.8MHeld
NEW YORK STATE COMMON RETIREMENT FUND64.4K$25.6MHeld
Swedbank AB61.9K$24.6MHeld
Integral Health Asset Management, LLC60K$23.9MHeld
Capital International, Inc./CA/59.6K$23.7MHeld
LMR Partners LLP59K$23.5MHeld
Ensign Peak Advisors, Inc57.9K$23MHeld
MACKAY SHIELDS LLC14.8M$21.8MHeld
Caisse de depot et placement du Quebec51.6K$20.5MHeld
Voleon Capital Management LP51.1K$20.3MHeld
KLP KAPITALFORVALTNING AS50.4K$20.1MHeld
Mirae Asset Global Investments Co., Ltd.49.5K$19.7MHeld
FRONTIER CAPITAL MANAGEMENT CO LLC48.9K$19.4MHeld
Andra AP-fonden48.5K$19.3MHeld
ANTIPODES PARTNERS Ltd47.9K$19MHeld
Allianz Asset Management GmbH47.9K$19MHeld
Parkman Healthcare Partners LLC47.7K$19MHeld
INTECH INVESTMENT MANAGEMENT LLC46.7K$18.6MHeld
FORSTA AP-FONDEN46.4K$18.5MHeld
LPL Financial LLC45.9K$18.3MHeld
Rhenman & Partners Asset Management AB45.7K$18.2MHeld
Rafferty Asset Management, LLC45K$17.9MHeld
State of New Jersey Common Pension Fund D45K$17.9MHeld
Schonfeld Strategic Advisors LLC44.9K$17.9MHeld
OSAIC HOLDINGS, INC.44.7K$17.8MHeld
PARNASSUS INVESTMENTS, LLC44.6K$17.7MHeld
PUBLIC EMPLOYEES RETIREMENT SYSTEM OF OHIO44.5K$17.7MHeld
ALLIANCEBERNSTEIN L.P.44.3K$17.6MHeld
Mariner, LLC42.4K$16.9MHeld
Mediolanum International Funds Ltd42.5K$16.9MHeld
Lansforsakringar Fondforvaltning AB (publ)42.3K$16.8MHeld
NEOS Investment Management LLC40.7K$16.2MHeld
HEALTHCARE OF ONTARIO PENSION PLAN TRUST FUND40.5K$16.1MHeld
Tredje AP-fonden40.4K$16.1MHeld
GUGGENHEIM CAPITAL LLC40.1K$16MHeld
NATIXIS39.8K$15.8MHeld
Gotham Asset Management, LLC39.6K$15.8MHeld
Resona Asset Management Co.,Ltd.39.2K$15.6MHeld
Bronte Capital Management Pty Ltd.38.9K$15.5MHeld
Citadel38.5K$15.3MHeld
Polymer Capital Management (HK) LTD36.8K$14.6MHeld
ARIZONA STATE RETIREMENT SYSTEM36.4K$14.5MHeld
GROUPAMA ASSET MANAGMENT35.9K$14.3M$14.1MCut−$4.34M
NISSAY ASSET MANAGEMENT CORP /JAPAN35.8K$14.2MHeld
PFA Pension, Forsikringsaktieselskab35.4K$14.1MHeld
BANK OF MONTREAL /CAN/35.1K$14MHeld
EVENTIDE ASSET MANAGEMENT, LLC34K$13.5MHeld
ROSENBLUM SILVERMAN SUTTON S F INC /CA33.2K$13.2MHeld
PANAGORA ASSET MANAGEMENT INC30.8K$12.3MHeld
DNB Asset Management AS30.7K$12.2MHeld
Jump Financial, LLC30.6K$12.2MHeld
GF FUND MANAGEMENT CO. LTD.30.5K$12.1MHeld
Zurich Insurance Group Ltd/FI30.3K$12.1MHeld
FJARDE AP-FONDEN /FOURTH SWEDISH NATIONAL PENSION FUND30.2K$12MHeld
ODDO BHF ASSET MANAGEMENT SAS30.1K$12MHeld
CIBC Asset Management Inc29.8K$11.9MHeld
Jefferies Financial Group Inc.646.3K$11.4MHeld
STRS OHIO28K$11.1MHeld
U.S. Capital Wealth Advisors, LLC27.3K$10.9MHeld
XPONANCE LLC27.3K$10.9MHeld
Trexquant Investment LP26.7K$10.6MHeld
EFG International AG26.4K$10.5MHeld
USS Investment Management Ltd26.2K$10.4MHeld
Varma Mutual Pension Insurance Co26.1K$10.4MHeld
Erste Asset Management GmbH26K$10.4MHeld
Illinois Municipal Retirement Fund25.8K$10.2MHeld
Quantinno Capital Management LP25.6K$10.2MHeld
Assenagon Asset Management S.A.25.6K$10.2MHeld
MACQUARIE GROUP LTD25.3K$10.1MHeld
China Universal Asset Management Co., Ltd.25.3K$10MHeld
Mizuho Markets Cayman LP25K$9.92MHeld
BROWN ADVISORY INC24.9K$9.88MHeld
Cerity Partners LLC24.6K$9.77MHeld
Eurizon Capital SGR S.p.A.24.4K$9.71MHeld
Creative Planning23.8K$9.47MHeld
Corient Private Wealth LLC23.8K$9.45MHeld
BRITISH COLUMBIA INVESTMENT MANAGEMENT Corp23.2K$9.23MHeld
TORONTO DOMINION BANK23.2K$9.23MHeld
Swiss Life Asset Management Ltd22.5K$8.94M−$1.26MCut−$877.6K
NOMURA HOLDINGS INC22.4K$8.92MHeld
BANCO BILBAO VIZCAYA ARGENTARIA, S.A.21.9K$8.72MHeld
CREDIT AGRICOLE S A21.5K$8.57MHeld
Investment Management Corp of Ontario21.5K$8.56MHeld
Avidity Partners Management LP21K$8.35MHeld
CAPITAL FUND MANAGEMENT S.A.20.9K$8.33MHeld
Utah Retirement Systems20.7K$8.24MHeld
FIDEURAM - INTESA SANPAOLO PRIVATE BANKING S.P.A.20.5K$8.14MHeld
STIFEL FINANCIAL CORP20.4K$8.12MHeld
Engineers Gate Manager LP20.2K$8.03MHeld
AIA Group Ltd20.2K$8.02M−$1.18MCut−$7.17M
TEACHER RETIREMENT SYSTEM OF TEXAS20K$7.97MHeld
Empowered Funds, LLC19.4K$7.73MHeld
Police & Firemen's Retirement System of New Jersey19.3K$7.67MHeld
Warberg Asset Management LLC5M$7.38MHeld
Liontrust Investment Partners LLP18.4K$7.31MHeld
Wealthfront Advisers LLC18.3K$7.26MHeld
Silvant Capital Management LLC18K$7.14MHeld
Vinva Investment Management Ltd18K$7.14MHeld
MML INVESTORS SERVICES, LLC27.6K$7.03MHeld
Cetera Investment Advisers17.5K$6.98MHeld
Elo Mutual Pension Insurance Co17.4K$6.94MHeld
Artia Global Partners LP17.4K$6.92MHeld
Prosight Management, LP17.1K$6.8MHeld
Entropy Technologies, LP16.1K$6.4MHeld
ASSETMARK, INC16K$6.38MHeld
OPPENHEIMER ASSET MANAGEMENT INC.97.6K$6.32MHeld
Sumitomo Mitsui DS Asset Management Company, Ltd15.9K$6.31MHeld
PROFUND ADVISORS LLC15.6K$6.2MHeld
MUTUAL OF AMERICA CAPITAL MANAGEMENT LLC15.5K$6.15MHeld
SSI INVESTMENT MANAGEMENT LLC4.1M$6.03MHeld
SHELTON CAPITAL MANAGEMENT15.1K$5.99MHeld
MUFG Securities EMEA plc15K$5.96MHeld
CAPITAL GROUP INVESTMENT MANAGEMENT PTE. LTD.14.8K$5.9MHeld
OP Asset Management Ltd14.8K$5.87M−$839.4KCut−$686.7K
WEALTH ENHANCEMENT ADVISORY SERVICES, LLC14.1K$5.74MHeld
Vanguard Personalized Indexing Management, LLC13.7K$5.46MHeld
PRUDENTIAL FINANCIAL INC13.3K$5.29MHeld
CAPTRUST FINANCIAL ADVISORS13.3K$5.27MHeld
Capula Management Ltd13.2K$5.24MHeld
NORDEA INVESTMENT MANAGEMENT AB12.9K$5.12MHeld
Rakuten Investment Management, Inc.12.7K$5.06MHeld
PNC Financial Services Group, Inc.12.7K$5.04MHeld
Federation des caisses Desjardins du Quebec12.5K$4.99MHeld
Motley Fool Asset Management LLC12.5K$4.98MHeld

Who left

Positions as of Q4 2025. 13F filings arrive up to 45 days after quarter-end and omit shorts. Values are quarter-end marks, as filed. Estimated mark is the price effect on shares still held — not realized P&L or investment advice.