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Who Owns Biogen Inc

Every manager with more than $100m in listed equities files a 13F each quarter naming what they hold. These are the ones reporting a position in Biogen Inc.

Who crossed 5% of BIIB →
Managers holding
35
as of 2026-09-30
Reported value
$156.8M
summed across filings
Shares held
694.3K
Added vs trimmed
11 / 7
since each filer's last quarter

Positions as of 2026-09-30

Largest first. The move is against the previous quarter that manager filed, not the previous calendar quarter.

ManagerValue
Artemis Investment Management LLPCOM581.8K shadded$131.4M
Mn Services Vermogensbeheer B.V.COM42.3K shheld$9.6M
Insight Wealth Strategies, LLCCOM34.2K shtrimmed$7.7M
GAMMA Investing LLCCommon Stock6.8K shadded$1.5M
STABLEFORD CAPITAL II LLCCOM6.7K shtrimmed$1.5M
Farther Finance Advisors, LLCStock3.7K shadded$845.2K
Wedmont Private CapitalCOM3.5K shadded$757.3K
TOMPKINS FINANCIAL CORPCOM2.2K shheld$496.9K
Everhart Financial Group, Inc.COM1.8K shheld$415.6K
RIVERSEDGE ADVISORS, LLCCOM1.8K shadded$398.7K
Investors Research CorpCOM1.6K shtrimmed$351.9K
Valeo Financial Advisors, LLCStock1.3K shadded$297.2K
Financial Symmetry IncCOM1.2K shheld$281.8K
CoreCap Advisors, LLCStock1.1K shadded$238.8K
ACIMA PRIVATE WEALTH, LLCStock834 shtrimmed$188.4K
EASTERN BANKCOM796 shheld$179.8K
MassMutual Private Wealth & Trust, FSBCommon / Ordinary Stock653 shtrimmed$147.5K
ARMSTRONG ADVISORY GROUP, INCCOM443 shheld$100.1K
Trust CoStock277 shtrimmed$62.6K
ELEVATION WEALTH PARTNERS, LLCCOM222 shtrimmed$50.1K
Quintet Private Bank (Europe) S.A.COM195 shheld$44K
GK Wealth Management LLCCOM173 sh—$39.1K
STEPH & COCOM152 shadded$34.3K
Grove Bank & TrustCOM113 shadded$25.5K
Brown Shipley& Co LtdCOM85 shheld$19.2K
TOTH FINANCIAL ADVISORY CORPCOM76 shadded$17.2K
FIRST COMMUNITY TRUST NACOM65 shheld$14.7K
Davis Capital ManagementStock44 shadded$9.9K
Rosenberg Matthew HamiltonStock35 shheld$7.9K
Marquette Asset Management, LLCCOM30 shheld$6.8K
Bangor Savings BankCOM28 shheld$6.3K
Bank of New HampshireCOM20 shheld$4.5K
MJT & Associates Financial Advisory Group, Inc.Stock15 shheld$3.4K
GILPIN WEALTH MANAGEMENT, LLCCOM5 sh—$1.1K
ATWOOD & PALMER INCCOM5 shheld$1.1K

Source: quarterly 13F filings, via EDGAR. A 13F reports positions by CUSIP alone; each CUSIP here has been confirmed against OpenFIGI rather than matched by name, because a name match would attribute one company's shareholders to another. Positions are as of quarter end and can be months old by the time they are filed, and 13F covers long equity positions only — not shorts, and not most debt. The summed value is what these filers reported, not the company's institutional ownership.

More on BIIB

Company overviewEverything on BIIB in one place, with the price.SEC filingsWhat BIIB's 8-Ks say happened: results, departures, auditor changes.Insider tradingWhat BIIB's own officers and directors buy and sell.Funds holding itWhich funds and ETFs hold BIIB, and how big a bet.LobbyingWhat BIIB spends lobbying Congress, and on what.Who lobbies for itThe lobbyists on BIIB's account, and who they worked for.Federal contractsWhat federal agencies pay BIIB.PatentsWhat BIIB is filing at the patent office.

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