13F

Stock

Alnylam Pharmaceuticals, Inc.

ALNY · held by 830 managers

Reported value

$40.4B

Holders

830

+97 new · −163 exited

Holders’ est. mark

−$8.02B

Price effect on 230 books still in the name

Largest holder

$4.85B

Fidelity

Notable conviction

Share of each notable manager’s 13F book.

Holder count by quarter

Who holds it

Notable only
InvestorSharesValueEst. markChange
Fidelity33M$4.85B−$1.08BCut−$1.5B
Capital World Investors10.8M$3.57B−$721.8MCut−$2.91B
BlackRock, Inc.27M$3.48B−$1.14BCut−$677.9M
Capital Research Global Investors9.47M$3.13B−$452.9MAdded$437.6M
VANGUARD PORTFOLIO MANAGEMENT LLC6.49M$2.15BHeld
JPMORGAN CHASE & CO7.37M$2B−$272MAdded$121.5M
VANGUARD CAPITAL MANAGEMENT LLC5.95M$1.97BHeld
State Street26.1M$1.13B−$228.5MCut−$187.7M
GEODE CAPITAL MANAGEMENT, LLC2.66M$884.6M−$175.5MCut−$172.3M
BAILLIE GIFFORD & CO2.49M$825.1M−$166.5MCut−$209.1M
TWO SIGMA INVESTMENTS, LP7.99M$667M−$193.6MAdded$422M
WELLINGTON MANAGEMENT GROUP LLP1.94M$640.5M−$108.8MCut−$7.2M
Dodge & Cox1.93M$638.3M−$128.8MCut−$142.8M
AMERICAN CENTURY COMPANIES INC1.8M$596.3M−$99.2MAdded$5.77M
Clearbridge Investments, LLC1.36M$448.7M−$39.9MAdded$211.3M
Orbis Allan Gray Ltd1.33M$441.7M−$89.1MCut−$201.8M
Invesco Ltd.3.79M$430.6M−$272.3MCut−$434.3M
MARSHALL WACE, LLP1.1M$363.7M−$36.7MAdded$145.1M
D. E. Shaw & Co., Inc.1.06M$350.4M−$29.7MAdded$173.7M
MORGAN STANLEY4.12M$335.8M−$297.2MCut−$50.2M
BANK OF AMERICA CORP /DE/11.9M$333.9M−$253.1MAdded$61.4M
Legal & General Group Plc934.9K$309.3M−$62.4MCut−$73M
Icahn Capital913.1K$297.9M−$65.2MCut−$67.9M
NORTHERN TRUST CORP858.1K$283.9M−$57.3MCut−$57.2M
VANGUARD FIDUCIARY TRUST CO840.9K$278.2MHeld
Qube Research & Technologies Ltd838.2K$277.3M−$51.7MCut−$30.7M
ROYAL BANK OF CANADA793.5K$261.9M−$40MAdded$26.7M
DEUTSCHE BANK AG\761.5K$251.9M−$47.5MCut−$31.2M
Amundi5.75M$247.3M−$735.9MCut−$729.9M
MANUFACTURERS LIFE INSURANCE COMPANY, THE14.5M$236.9M$196.4MAdded$184M
FEDERATED HERMES, INC.687.8K$227.6M−$41.9MCut−$22.2M
UBS AM, a distinct business unit of UBS ASSET MANAGEMENT AMERICAS LLC677.5K$224.2M−$43.6MCut−$35.2M
CHARLES SCHWAB INVESTMENT MANAGEMENT INC673.4K$222.8M−$43.3MCut−$34.8M
LOOMIS SAYLES & CO L P517K$171M−$33.3MCut−$27M
MASSACHUSETTS FINANCIAL SERVICES CO /MA/496K$164.1M−$33.1MCut−$32.8M
Bank of New York Mellon Corp706.2K$162.8M−$84.3MCut−$37.7M
FRANKLIN RESOURCES INC2.71M$158.5M−$124.8MCut−$158M
GOLDMAN SACHS GROUP INC843.4K$155.8M$84.7MAdded$4.45M
UBS Group AG481.5K$151.9M−$39.5MCut−$176.5M
MILLENNIUM MANAGEMENT LLC447.9K$148.2M−$5.04MAdded$118.2M
Squarepoint Ops LLC426.7K$141.2M−$23.4MAdded$1.63M
BNP PARIBAS FINANCIAL MARKETS32.6M$134.4M−$107.3MCut−$45.9M
RAYMOND JAMES FINANCIAL INC407K$130M−$30.3MCut−$24.5M
Swiss National Bank387.7K$128.3M−$24MCut−$14.6M
DIMENSIONAL FUND ADVISORS LP384.2K$127.1M−$20.2MAdded$7.04M
FIRST TRUST ADVISORS LP382.7K$126.6M−$17.2MAdded$24.4M
WELLS FARGO & COMPANY/MN1.25M$114.6M$36.9MAdded$10M
Nuveen, LLC322.2K$106.6M−$21.5MCut−$118.4M
Sumitomo Mitsui Trust Group, Inc.314.4K$104M−$21MCut−$26.3M
CONGRESS ASSET MANAGEMENT CO285.7K$94.5M−$18MCut−$12.5M
CITIGROUP INC5.92M$94.4M−$56.9MAdded$24.9M
TD Asset Management Inc281.8K$93.3M−$18MCut−$13.8M
GILDER GAGNON HOWE & CO LLC280.1K$92.7M−$18.7MCut−$34.3M
Allspring Global Investments Holdings, LLC281.8K$92.6M−$19.9MCut−$18.9M
PINEBRIDGE INVESTMENTS LLC271.4K$89.8M−$6.69MAdded$50M
NOMURA ASSET MANAGEMENT INTERNATIONAL INC.2.35M$88.3M−$35.9MCut−$38.7M
Polar Capital Holdings Plc257.7K$85.3M−$16.1MCut−$10.4M
WESTFIELD CAPITAL MANAGEMENT CO LP245.5K$81.2M−$6.24MAdded$44.1M
Woodline Partners LP243.9K$80.7M−$117.5KAdded$80M
AMERIPRISE FINANCIAL INC239.9K$79.4M−$12.1MAdded$7.36M
Bellevue Group AG234.5K$77.6M−$15.7MCut−$99.7M
Pictet Asset Management Holding SA237.9K$77.5M−$17.2MCut−$48.3M
STEELHEAD PARTNERS LLC60M$77.1MNew
Man Group plc232.4K$76.9M−$9.63MAdded$19.5M
California Public Employees Retirement System228K$75.4M−$15.2MCut−$18.8M
Candriam S.C.A.224.3K$74.2M−$15MCut−$15M
BARCLAYS PLC220.6K$73M−$5.28MCut−$15.5M
VANGUARD ASSET MANAGEMENT, Ltd219.2K$72.5MHeld
BNP PARIBAS ASSET MANAGEMENT Holding S.A.9.93M$72.1M$35.2MAdded$72.1M
ROYAL LONDON ASSET MANAGEMENT LTD215.1K$71.2M−$14.4MCut−$29.5M
JACOBS LEVY EQUITY MANAGEMENT, INC212.2K$70.2M−$14.2MCut−$89.4M
CANADA PENSION PLAN INVESTMENT BOARD208.9K$69.1M−$14MCut−$33.7M
Korea Investment CORP200.3K$66.3M−$12.7MCut−$9.18M
CALIFORNIA STATE TEACHERS RETIREMENT SYSTEM196.9K$65.1M−$13.1MCut−$15.1M
VICTORY CAPITAL MANAGEMENT INC195.9K$64.8M−$13.1MCut−$23M
RHUMBLINE ADVISERS195.3K$64.6M−$13MCut−$13M
VOLORIDGE INVESTMENT MANAGEMENT, LLC189.2K$62.6M−$10.7MCut−$1.25M
National Pension Service183.8K$60.8M−$11.2MCut−$6.05M
Life Cycle Investment Partners Ltd177.5K$58.7M−$5.88MAdded$23.7M
SUSQUEHANNA INTERNATIONAL GROUP, LLP174.3K$57.7M−$11.6MCut−$18.6M
ProShare Advisors LLC174K$57.6M−$11.6MCut−$26.4M
ENVESTNET ASSET MANAGEMENT INC171.8K$56.8M−$8.05MAdded$8.92M
Universal- Beteiligungs- und Servicegesellschaft mbH8.35M$56.7M−$24.4MAdded$559.1K
CIBC Bancorp USA Inc.169K$55.9MHeld
Mitsubishi UFJ Asset Management Co., Ltd.152.2K$50.4M−$9.62MCut−$5.18M
SCS Capital Management LLC149.5K$49.5M−$9.99MCut−$10M
VOYA INVESTMENT MANAGEMENT LLC148.5K$49.1M$48.8MCut−$235.7M
JANUS HENDERSON GROUP PLC147.1K$48.7M−$9.12MCut−$5.59M
Russell Investments Group, Ltd.147.5K$48.5M−$10.2MCut−$17.4M
ANTIPODES PARTNERS Ltd145.3K$48.1M−$3.2MAdded$29M
CAPITAL FUND MANAGEMENT S.A.140.1K$46.4M−$1.4MAdded$38M
Aberdeen Group plc138.3K$45.8M−$8.87MCut−$7.06M
BROWN ADVISORY INC134K$44.3M−$1.66MAdded$34.4M
Soleus Capital Management, L.P.131.7K$43.6M−$4.67MAdded$15.7M
Assenagon Asset Management S.A.128.9K$42.6M−$1.71MAdded$32.5M
Robeco Institutional Asset Management B.V.126.5K$41.8M−$8.45MCut−$15.7M
Boussard & Gavaudan Investment Management LLP32K$40.8M−$4.2MAdded$9.89M
ORBIMED ADVISORS LLC119K$39.4M−$7.95MCut−$75.5M
AVIVA PLC114K$37.7M−$7.39MCut−$6.28M
STATE BOARD OF ADMINISTRATION OF FLORIDA RETIREMENT SYSTEM112.7K$37.3M−$7.53MCut−$8.28M
Bridgewater106.6K$35.3M−$5.72MAdded$1.22M
HighTower Advisors, LLC105.9K$35M−$7.07MCut−$7.32M
SEI INVESTMENTS CO351.3K$33.5M−$9.72MCut−$11M
Alberta Investment Management Corp25M$32.1M−$9.72MCut−$9.74M
TREMBLANT CAPITAL GROUP94.6K$31.3M−$6.31MCut−$12.5M
NEUBERGER BERMAN GROUP LLC93.5K$30.9M−$6.24MCut−$14.9M
DeepCurrents Investment Group LLC24M$30.9MNew
NOMURA ASSET MANAGEMENT CO LTD93.2K$30.8M−$6.23MCut−$6.64M
FIL Ltd91.5K$30.3M−$6.11MCut−$7.17M
HSBC HOLDINGS PLC89.6K$29.6M−$6.07MCut−$6.04M
LOS ANGELES CAPITAL MANAGEMENT LLC88.3K$29.2M−$10.5MCut−$78.7M
Andra AP-fonden86.7K$28.7M−$3.24MAdded$9.38M
Quadrature Capital Ltd85.2K$28.2MNew
MIRAE ASSET GLOBAL ETFS HOLDINGS Ltd.81.3K$26.9M−$5.36MCut−$4.96M
Fiera Capital Corp78.8K$26.1M−$4.72MCut−$2.04M
Prosight Management, LP76K$25.1M−$1.14MAdded$18.3M
Casdin Capital, LLC75K$24.8M−$5.01MCut−$5.01M
Zurcher Kantonalbank (Zurich Cantonalbank)74.9K$24.8M−$5MCut−$10.9M
LMR Partners LLP74.7K$24.7M−$3.94MAdded$1.23M
Rock Springs Capital Management LP74K$24.5M−$4.76MCut−$3.85M
Mitsubishi UFJ Trust & Banking Corp72.8K$24.1M−$4.86MCut−$7.49M
CSS LLC/IL18.6M$23.9MNew
Schonfeld Strategic Advisors LLC71.8K$23.7M−$3MAdded$5.89M
JONES FINANCIAL COMPANIES LLLP73.6K$23.4M−$62.6KAdded$23.1M
Ensign Peak Advisors, Inc69.6K$23M−$3.87MAdded$7.44K
STATE OF WISCONSIN INVESTMENT BOARD68.9K$22.8M$22.1MCut−$7.89M
NEOS Investment Management LLC68.9K$22.8M−$2.72MAdded$6.6M
INTECH INVESTMENT MANAGEMENT LLC68K$22.5M−$3.12MAdded$3.93M
DEERFIELD MANAGEMENT COMPANY, L.P.67.9K$22.5M−$4.54MCut−$4.54M
LPL Financial LLC67.6K$22.4M−$3.07MAdded$4.12M
SCHRODER INVESTMENT MANAGEMENT GROUP66.7K$22.1M−$4.43MCut−$4.98M
DANSKE BANK A/S66K$21.8M−$4.4MCut−$4.9M
Vanguard Investments Australia, Ltd.65.8K$21.8MHeld
NEW YORK STATE COMMON RETIREMENT FUND65.4K$21.6M−$4.3MCut−$3.97M
Vanguard Global Advisers, LLC65.4K$21.6MHeld
STOREBRAND ASSET MANAGEMENT AS64.6K$21.4M−$4.31MCut−$8.36M
NATIONAL BANK OF CANADA /FI/63.6K$21M−$4.25MCut−$5.37M
Swedbank AB62.2K$20.6M−$4.14MCut−$4.05M
Trexquant Investment LP61.8K$20.4M−$1.79MAdded$9.8M
PFA Pension, Forsikringsaktieselskab59.7K$19.8M−$2.35MAdded$5.69M
Driehaus Capital Management LLC59.6K$19.7M−$3.98MCut−$8.02M
Polymer Capital Management (HK) LTD57.8K$19.1M−$2.46MAdded$4.5M
Asset Management One Co., Ltd.57.7K$19.1M−$3.92MCut−$6.9M
MACKAY SHIELDS LLC14.8M$19.1M−$2.8MCut−$2.79M
Tidal Investments LLC57.9K$18.8M−$352.6KAdded$16.9M
Mirae Asset Global Investments Co., Ltd.56.4K$18.7M−$3.3MCut−$1.01M
ALLIANCEBERNSTEIN L.P.44.6K$17.8M$1Added$128K
CAPITAL INTERNATIONAL SARL53.3K$17.7M−$3.56MCut−$29.8M
KLP KAPITALFORVALTNING AS51.2K$16.9M−$3.37MCut−$3.12M
Rafferty Asset Management, LLC50.6K$16.7M−$3.01MCut−$1.18M
STIFEL FINANCIAL CORP50K$16.5M−$1.36MAdded$8.41M
Tredje AP-fonden49.6K$16.4M−$2.7MAdded$325.4K
PARNASSUS INVESTMENTS, LLC49K$16.2M−$2.98MCut−$1.51M
FJARDE AP-FONDEN /FOURTH SWEDISH NATIONAL PENSION FUND48.7K$16.1M−$2.02MAdded$4.1M
Jain Global LLC48K$15.9MNew
Allianz Asset Management GmbH47.7K$15.8M−$3.18MCut−$3.27M
Investment Management Corp of Ontario47.2K$15.6M−$1.44MAdded$7.04M
OSAIC HOLDINGS, INC.46.7K$15.4M−$2.99MCut−$2.35M
State of New Jersey Common Pension Fund D45.2K$14.9M−$3MCut−$2.95M
PUBLIC EMPLOYEES RETIREMENT SYSTEM OF OHIO44K$14.6M−$2.94MCut−$3.13M
Gotham Asset Management, LLC43.7K$14.5M−$2.65MCut−$1.29M
Mediolanum International Funds Ltd45.1K$14.3M−$3.45MCut−$2.61M
WORLDQUANT MILLENNIUM ADVISORS LLC42.2K$13.9M−$2.82MCut−$122.6M
Lansforsakringar Fondforvaltning AB (publ)41.9K$13.9M−$2.8MCut−$2.98M
Hudson Bay Capital Management LP40K$13.2M−$2.67MCut−$20.6M
Resona Asset Management Co.,Ltd.39.8K$13.1M−$2.72MCut−$2.53M
M&G PLC37.7K$12.5MNew
Bronte Capital Management Pty Ltd.37.2K$12.3M−$2.49MCut−$3.13M
GUGGENHEIM CAPITAL LLC37.1K$12.3M−$2.48MCut−$3.68M
FIDEURAM - INTESA SANPAOLO PRIVATE BANKING S.P.A.37K$12.3M−$1.37MAdded$4.11M
NISSAY ASSET MANAGEMENT CORP /JAPAN36.9K$12.2M−$2.39MCut−$2.03M
GROUPAMA ASSET MANAGMENT36.8K$12.2M−$2.4MCut−$2.1M
ARIZONA STATE RETIREMENT SYSTEM35.9K$11.9M−$2.4MCut−$2.59M
Entropy Technologies, LP35.7K$11.8M−$1.07MAdded$5.42M
STRS OHIO35.5K$11.8M−$1.87MAdded$608K
Vinva Investment Management Ltd36.6K$11.6M−$1.46MAdded$4.43M
HEALTHCARE OF ONTARIO PENSION PLAN TRUST FUND34.8K$11.5M−$2.32MCut−$4.58M
Erste Asset Management GmbH36.3K$11.5M−$2.15MAdded$1.1M
Rhenman & Partners Asset Management AB34.5K$11.4M−$2.3MCut−$6.76M
Quantinno Capital Management LP33.9K$11.2M−$1.71MAdded$1.02M
EFG International AG2.03M$11M−$10.4MAdded$525.9K
ODDO BHF ASSET MANAGEMENT SAS33K$10.9M−$2.01MCut−$1.06M
ROSENBLUM SILVERMAN SUTTON S F INC /CA32.9K$10.9M−$2.2MCut−$2.3M
Engineers Gate Manager LP32.5K$10.8M−$1.35MAdded$2.72M
FengHe Fund Management Pte. Ltd.32.5K$10.8M−$2.17MCut−$76.2M
BANK OF MONTREAL /CAN/31.9K$10.5M−$2.13MCut−$3.42M
DNB Asset Management AS31.4K$10.4M−$2.05MCut−$1.81M
Aquatic Capital Management LLC31.1K$10.3MNew
FRONTIER CAPITAL MANAGEMENT CO LLC30.6K$10.1M−$2.04MCut−$9.3M
SIERRA SUMMIT ADVISORS LLC30.3K$10MNew
SEB Asset Management AB30.2K$9.98MHeld
GF FUND MANAGEMENT CO. LTD.30K$9.94M−$2.01MCut−$2.17M
Mariner, LLC29.9K$9.91M−$2MCut−$6.97M
XPONANCE LLC29.9K$9.88M−$1.82MCut−$983.6K
CIBC Asset Management Inc29.5K$9.75M−$1.97MCut−$2.11M
CAPITAL INTERNATIONAL LTD /CA/29.1K$9.62M−$1.94MCut−$17.3M
Jefferies Financial Group Inc.706.6K$9.33M−$2.85MCut−$2.05M
China Universal Asset Management Co., Ltd.27.3K$9.02M−$1.69MCut−$1.03M
IFM Investors Pty Ltd27.3K$9.02M$8.67MAdded$9.01M
Parkman Healthcare Partners LLC26.9K$8.91M−$1.8MCut−$10.1M
USS Investment Management Ltd26.8K$8.88M−$1.76MCut−$1.55M
Corient Private Wealth LLC25.7K$8.5M−$1.59MCut−$948.3K
Capital International, Inc./CA/25.6K$8.45M−$1.71MCut−$15.2M
Daiwa Securities Group Inc.25.4K$8.39M$8.38MAdded$8.38M
U.S. Capital Wealth Advisors, LLC24.5K$8.12M−$1.64MCut−$2.75M
Illinois Municipal Retirement Fund24.3K$8.04M−$1.62MCut−$2.21M
OSSIAM24.2K$8M−$119.3KAdded$7.29M
Creative Planning24.1K$7.98M−$1.59MCut−$1.49M
Voleon Capital Management LP24.1K$7.97M−$1.61MCut−$12.4M
Eurizon Capital SGR S.p.A.24.2K$7.96M−$1.66MCut−$1.75M
Swiss Life Asset Management Ltd23.7K$7.85M−$1.5MCut−$1.08M
OP Asset Management Ltd23.5K$7.77M−$986.3KAdded$1.89M
Citadel23.4K$7.75M−$1.56MCut−$7.55M
Cetera Investment Advisers23.2K$7.67M−$1.17MAdded$688.8K
IEQ CAPITAL, LLC22.9K$7.57M−$1.53MCut−$18.2M
MACKENZIE FINANCIAL CORP22.5K$7.45M−$813.1KAdded$2.53M
Varma Mutual Pension Insurance Co21.1K$6.98M−$1.41MCut−$3.4M
683 Capital Management, LLC21K$6.95M−$252.6KAdded$5.44M
Utah Retirement Systems20.6K$6.82M−$1.38MCut−$1.43M
Cerity Partners LLC20.3K$6.7M−$1.35MCut−$3.07M
OPPENHEIMER ASSET MANAGEMENT INC.100.8K$6.67M$133.3KAdded$348.2K
Police & Firemen's Retirement System of New Jersey19.7K$6.5M−$1.29MCut−$1.17M
Warberg Asset Management LLC5M$6.42M−$958.4KCut−$958.4K
Jump Financial, LLC19.2K$6.34M−$1.28MCut−$5.82M
TEACHER RETIREMENT SYSTEM OF TEXAS18.8K$6.23M−$1.26MCut−$1.74M
TORONTO DOMINION BANK18.6K$6.15M−$1.24MCut−$3.07M
Silvant Capital Management LLC18.3K$6.04M−$1.2MCut−$1.1M
Liontrust Investment Partners LLP18.2K$6.03M−$1.22MCut−$1.28M
BRITISH COLUMBIA INVESTMENT MANAGEMENT Corp18.2K$6.02M−$1.22MCut−$3.21M
PUBLIC SECTOR PENSION INVESTMENT BOARD18K$5.96MNew
Slow Capital, Inc.17.5K$5.78MNew
NATIXIS17.1K$5.65M−$1.14MCut−$10.2M
Portman Square Capital LLP16.9K$5.6M−$164.1KAdded$4.62M
LAZARD ASSET MANAGEMENT LLC16.3K$5.39M−$678KAdded$1.35M
MACQUARIE GROUP LTD16K$5.31M−$1.07MCut−$4.74M
Sumitomo Mitsui DS Asset Management Company, Ltd15.9K$5.28M−$1.06MCut−$1.04M
SSI INVESTMENT MANAGEMENT LLC4.1M$5.25M−$773.7KCut−$773.7K
MML INVESTORS SERVICES, LLC25.5K$5.14M−$1.35MCut−$1.9M
SHELTON CAPITAL MANAGEMENT14.8K$4.91M−$990.8KCut−$1.08M
PROFUND ADVISORS LLC14.6K$4.85M−$978.1KCut−$1.35M
Elo Mutual Pension Insurance Co14.6K$4.84M−$976.4KCut−$2.1M
NOMURA HOLDINGS INC14.3K$4.73M−$954.9KCut−$4.19M
ASSETMARK, INC14.2K$4.7M−$948.8KCut−$1.67M
LBP AM SA14.2K$4.7M−$520.2KAdded$1.6M
Rakuten Investment Management, Inc.14.4K$4.56M−$1.05MCut−$497.1K
DARK FOREST CAPITAL MANAGEMENT LP13.7K$4.54M−$448.4KAdded$1.87M
MIROVA13.7K$4.53MNew
HIMENSION CAPITAL (SINGAPORE) PTE. LTD.13.2K$4.36M−$680.2KAdded$307.2K
NORDEA INVESTMENT MANAGEMENT AB13.3K$4.35M−$926.7KCut−$766.7K
Empire Life Investments Inc.13.2K$4.34MNew

Who left

Positions as of Q1 2026. 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.