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Disclosery

BIIB BIOGEN INC

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Stock (common), issuer CIK 875045

Filings received so far for Q3 2026: 41 13F filers report a position in BIIB shares at 2026-09-30. The quarter is not complete: its 13F deadline is 2026-11-14, and the counts grow as filings arrive.

13D and 13G filers

No 13D or 13G on this security in the data. Structured 13D/G data starts 2024-12-18.

Insider trades

No Form 4 transaction on this security in the data.

13F holders, Q3 2026

Filers in the available 13F reports with a share position at 2026-09-30, filer groups collapsed to one row (method), largest first. Options and principal amounts are left out. A group row states no % of portfolio, since each member reports its own portfolio: the members' percents are listed under it. A value about 1,000 times or 1/1,000 of the price other filers imply is shown as filed but neither ranks the row nor enters a sum.

HolderSharesValue% of portfolioChangeSource
Artemis Investment Management LLP581,774$131M1.15%+10,80013F-HRTimeline
Mn Services Vermogensbeheer B.V.42,300$9.55M0.07%013F-HRTimeline
Insight Wealth Strategies, LLC34,161$7.72M0.76%-15913F-HRTimeline
GAMMA Investing LLC6,832$1.54M0.05%+37013F-HRTimeline
STABLEFORD CAPITAL II LLC6,731$1.52M0.53%-18113F-HRTimeline
Farther Finance Advisors, LLC3,742$845K0.01%+9313F-HRTimeline
Wedmont Private Capital3,467$757K0.02%+45513F-HRTimeline
TOMPKINS FINANCIAL CORPin group TOMPKINS FINANCIAL CORP2,200$497K0.04%013F-HRTimelineGroup
Boltwood Capital Management1,982$448K0.1%+49313F-HRTimeline
Everhart Financial Group, Inc.1,840$416K0.03%013F-HRTimeline
RIVERSEDGE ADVISORS, LLC1,765$399K0.05%+1913F-HRTimeline
CX Institutional1,704$385K0.01%+313F-HRTimeline
Versant Capital Management, Inc1,581$357K0.03%+4213F-HRTimeline
Investors Research Corp1,558$352K0.06%-8313F-HRTimeline
Valeo Financial Advisors, LLC1,316$297K0.01%+1513F-HRTimeline
Financial Symmetry Inc1,248$282K0.09%013F-HRTimeline
CoreCap Advisors, LLC1,057$239K0.01%+19913F-HRTimeline
ACIMA PRIVATE WEALTH, LLC834$188K0.05%-8213F-HRTimeline
EASTERN BANK796$180K<0.01%013F-HRTimeline
MassMutual Private Wealth & Trust, FSB653$148K<0.01%-8013F-HRTimeline
Polaris Financial Partners477$109K0.05%13F-HRTimeline
ARMSTRONG ADVISORY GROUP, INC443$100K0.01%013F-HRTimeline
Trust Co277$62.6K0.01%-1413F-HRTimeline
ELEVATION WEALTH PARTNERS, LLC222$50.1K0.01%-113F-HRTimeline
GoalVest Advisory LLC198$44.7K0.01%013F-HRTimeline
Quintet Private Bank (Europe) S.A.195$44K<0.01%013F-HRTimeline
GK Wealth Management LLC173$39.1K0.02%new13F-HRTimeline
STEPH & CO152$34.3K0.01%+5513F-HRTimeline
Grove Bank & Trust113$25.5K<0.01%+2613F-HRTimeline
Brown Shipley& Co Ltd85$19.2K0.01%013F-HRTimeline
TOTH FINANCIAL ADVISORY CORP76$17.2K<0.01%+6613F-HRTimeline
FIRST COMMUNITY TRUST NA65$14.7K<0.01%013F-HRTimeline
Davis Capital Management44$9.94K0.01%+4013F-HRTimeline
Rosenberg Matthew Hamilton35$7.91K<0.01%013F-HRTimeline
Planning Strategies Inc.33$7.45K<0.01%+113F-HRTimeline
Marquette Asset Management, LLC30$6.78K<0.01%013F-HRTimeline
Bangor Savings Bank28$6.33K<0.01%013F-HRTimeline
Bank of New Hampshire20$4.52K<0.01%013F-HRTimeline
MJT & Associates Financial Advisory Gro…15$3.39K<0.01%013F-HRTimeline
ATWOOD & PALMER INC5$1.13K<0.01%013F-HRTimeline
GILPIN WEALTH MANAGEMENT, LLC5$1.13K<0.01%new13F-HRTimeline