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Disclosery

BIIB BIOGEN INC

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Stock (common), issuer CIK 875045

980 managers (1,004 13F filers) reported a position in BIIB shares at 2025-12-31, 139,827,201 shares in all. 137 filers opened a position and 82 filers sold out during the quarter.

Managers
980
13F filers
1,004
New
137
Added
322
Reduced
296
Sold out
82
Shares held by filers
139,827,201

Shares held by filers adds up every 13F filer's report, so a share reported by a parent and by its subsidiary counts twice (H9). Managers counts each filer group once.

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, Q4 2025

Filers in the available 13F reports with a share position at 2025-12-31, 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
Heritage Wealth Advisors2,000$352K0.01%013F-HRTimeline
Northwest & Ethical Investments L.P.2,000$352K0.01%013F-HR/ATimeline
PKO Investment Management Joint-Stock Co2,000$352K0.03%-4,00013F-HRTimeline
B. Riley Wealth Advisors, Inc.1,996$351K0.02%-3013F-HRTimeline
QTR Family Wealth, LLC1,852$350K0.15%+9213F-HRTimeline
HighPoint Advisor Group LLC1,980$349K0.01%+2213F-HRTimeline
Simplicity Wealth,LLC1,952$344K0.02%+17613F-HRTimeline
Aprio Wealth Management, LLC1,950$343K0.02%new13F-HRTimeline
CIDEL ASSET MANAGEMENT INC1,939$341K0.02%-8513F-HRTimeline
Stratos Wealth Partners, LTD.in group Stratos Wealth Partners, LTD.1,925$339K<0.01%+11513F-HRTimelineGroup
DRW Securities, LLC1,955$338K0.03%new13F-HRTimeline
BSW Wealth Partners1,909$336K0.04%-7913F-HRTimeline
Camelot Portfolios, LLC1,900$334K0.21%-20013F-HRTimeline
FLPUTNAM INVESTMENT MANAGEMENT CO1,898$334K<0.01%-22313F-HRTimeline
FORBES J M & CO LLP1,869$329K0.03%013F-HRTimeline
Smartleaf Asset Management LLC1,852$327K0.01%+1,22413F-HRTimeline
Investors Research Corp1,850$326K0.06%013F-HRTimeline
Rock Point Advisors, LLC1,840$324K0.08%013F-HRTimeline
Oslo Pensjonsforsikring AS1,840$324K0.05%013F-HRTimeline
HANTZ FINANCIAL SERVICES, INC.1,836$323K<0.01%+20013F-HRTimelineThe filing omitted confidential holdings, a later amendment may add them.
Claret Asset Management Corp1,833$323K0.04%-513F-HRTimeline
Abacus Planning Group, Inc.1,832$322K0.04%+19113F-HRTimeline
MISSION WEALTH MANAGEMENT, LP1,822$321K0.01%+9213F-HRTimeline
Trail Ridge Investment Advisors, LLC1,807$318K0.14%013F-HRTimeline
Applied Finance Capital Management, LLC1,804$317K0.02%-1,07413F-HRTimeline
EP Wealth Advisors, LLC1,800$317K<0.01%13F-HRTimeline
CITIZENS FINANCIAL GROUP INC/RIin group CITIZENS FINANCIAL GROUP INC/…1,797$316K<0.01%-20013F-HRTimelineGroup
SBI Securities Co., Ltd.1,775$312K0.01%-31113F-HRTimeline
Parkside Financial Bank & Trust1,771$312K0.02%+3213F-HRTimeline
WADDELL & ASSOCIATES, LLC1,742$307K0.02%+2313F-HRTimeline
HANCOCK WHITNEY CORP1,740$306K0.01%013F-HRTimeline
Plancorp, LLC1,737$306K0.01%+14113F-HRTimeline
INVESTMENT HOUSE LLC1,730$304K0.01%013F-HRTimeline
AE Wealth Management LLC1,714$302K<0.01%+25213F-HRTimeline
Optas, LLC1,706$300K0.05%+7313F-HRTimeline
CX Institutional1,706$300K0.01%+25313F-HRTimeline
Kera Capital Partners, Inc.1,665$300K0.04%013F-HRTimeline
FLAGSHIP HARBOR ADVISORS, LLC1,692$298K0.01%-60713F-HRTimeline
PEAPACK GLADSTONE FINANCIAL CORP1,688$297K<0.01%-18013F-HRTimeline
Resonant Capital Advisors, LLC1,684$296K0.02%+10913F-HRTimeline
Everhart Financial Group, Inc.1,657$292K0.03%new13F-HRTimeline
Farther Finance Advisors, LLC1,656$291K<0.01%+60713F-HRTimeline
TRANSCEND CAPITAL ADVISORS, LLC1,649$290K0.02%-3013F-HRTimeline
Financiere des Professionnels - Fonds d…1,646$290K0.02%013F-HRTimeline
FLORIDA FINANCIAL ADVISORS, LLC1,624$286K0.08%new13F-HRTimeline
Trust Asset Management LLC1,617$285K0.02%-5813F-HRTimeline
Quantitative Investment Management, LLC1,614$284K0.03%new13F-HRTimeline
SUMITOMO LIFE INSURANCE CO1,605$282K0.01%-1213F-HRTimeline
One Wealth Advisors, LLC1,604$282K0.03%new13F-HRTimeline
CARY STREET PARTNERS ASSET MANAGEMENT L…group of 2 filers holding1,602$282K+138Timeline
UMB Bank, n.a.1,599$281K<0.01%+16313F-HRTimelineThe filing omitted confidential holdings, a later amendment may add them.
Baker Avenue Asset Management, LP1,597$281K0.01%-113F-HRTimeline
Aptus Capital Advisors, LLC1,568$276K<0.01%new13F-HRTimeline
Advisory Services Network, LLC1,565$275K<0.01%-22713F-HRTimeline
Joel Isaacson & Co., LLC1,564$275K0.01%-10013F-HRTimeline
WMS Group LLC1,550$273K0.35%13F-HRTimeline
EARNED WEALTH ADVISORS, LLC1,547$272K0.02%+213F-HR/ATimeline
POINCIANA ADVISORS GROUP, LLC1,541$271K0.21%-1313F-HRTimeline
Alpha Family Trustin group Alpha Family Trust1,540$271K0.12%013F-HRTimelineGroup
BERKSHIRE ASSET MANAGEMENT LLC/PA1,535$270K0.01%-613F-HRTimeline
Modern Wealth Management, LLC1,533$270K<0.01%+2613F-HRTimeline
GREAT VALLEY ADVISOR GROUP, INC.in group GREAT VALLEY ADVISOR GROUP, I…1,522$268K0.01%-75013F-HRTimelineGroup
Dorsey & Whitney Trust CO LLC1,506$265K0.01%new13F-HRTimeline
Perigon Wealth Management, LLC1,502$264K<0.01%new13F-HRTimeline
Moors & Cabot, Inc.1,499$264K0.01%new13F-HRTimeline
NorthRock Partners, LLC1,469$259K<0.01%-2,12713F-HRTimeline
SG Trading Solutions, LLC1,467$258K0.06%13F-HRTimeline
FineMark National Bank & Trust1,463$257K0.01%new13F-HRTimeline
Turtle Creek Wealth Advisors, LLC1,462$257K0.02%new13F-HRTimeline
Prasad Wealth Partners, LLC1,452$256K0.07%013F-HRTimeline
Marathon Trading Investment Management …in group Marathon Trading Investment M…1,450$255K0.03%-30013F-HRTimelineGroup
Allegheny Financial Group1,442$254K0.04%-97713F-HRTimeline
JOURNEY STRATEGIC WEALTH LLC1,440$253K0.01%new13F-HRTimeline
ING GROEP NV1,434$252K<0.01%new13F-HRTimeline
KINGSWOOD WEALTH ADVISORS, LLC1,431$252K0.01%new13F-HRTimeline
IFG Advisory, LLC1,425$251K0.01%new13F-HRTimeline
Apollon Wealth Management, LLCin group Apollon Wealth Management, LLC1,421$250K<0.01%new13F-HRTimelineGroup
MONECO ADVISORS, LLC1,419$250K0.02%new13F-HRTimeline
Verdence Capital Advisors LLC1,413$249K0.01%-8013F-HRTimeline
Procyon Advisors, LLC1,397$246K0.01%new13F-HRTimeline
OneDigital Investment Advisors LLC1,392$245K<0.01%new13F-HRTimeline
CIGNA INVESTMENTS INC /NEWin group CIGNA INVESTMENTS INC /NEW1,395$245K0.04%-6213F-HRTimelineGroup
LGT Fund Management Co Ltd.1,349$238K0.02%new13F-HRTimeline
JACKSON THORNTON WEALTH MANAGEMENT, LLC1,297$237K0.02%new13F-HRTimeline
Ameritas Investment Partners, Inc.group of 2 filers holding1,336$235K-5,243Timeline
Livforsakringsbolaget Skandia, Omsesidi…1,330$234K0.01%013F-HRTimeline
Hansen & Associates Financial Group, In…1,226$232K0.13%new13F-HRTimeline
State of Wyoming1,293$228K0.02%-23413F-HRTimeline
Keel Point, LLC1,292$227K0.01%new13F-HRTimeline
PDS Planning, Inc1,291$227K0.02%new13F-HRTimeline
RIVERSEDGE ADVISORS, LLC1,288$227K0.04%new13F-HRTimeline
MATHER GROUP, LLC.1,282$226K<0.01%+38013F-HRTimeline
JOHNSON INVESTMENT COUNSEL INC1,269$223K<0.01%-16013F-HRTimeline
Composition Wealth, LLC1,268$223K<0.01%new13F-HRTimeline
SAGESPRING WEALTH PARTNERS, LLC1,254$221K<0.01%new13F-HRTimeline
Western Wealth Management, LLC1,254$221K0.01%new13F-HRTimeline
SageView Advisory Group, LLC1,253$221K0.01%new13F-HRTimeline
MMBG INVESTMENT ADVISORS CO.1,248$220K0.02%new13F-HRTimeline
PATTON FUND MANAGEMENT, INC.1,244$219K0.03%-60213F-HRTimeline
REGIONS FINANCIAL CORPin group REGIONS FINANCIAL CORP1,237$218K<0.01%new13F-HRTimelineGroup
Advyzon Investment Management, LLC1,212$213K0.02%new13F-HRTimeline
Analyst IMS Investment Management Servi…in group Analyst IMS Investment Manage…1,208$213K0.01%new13F-HRTimelineGroup
IFP Advisors, Inc1,206$212K<0.01%+11013F-HRTimeline
Valeo Financial Advisors, LLC1,197$211K<0.01%new13F-HRTimeline
Pure Financial Advisors, LLC1,173$206K<0.01%new13F-HRTimeline
Basepoint Wealth LLC1,164$205K0.12%new13F-HRTimeline
Bridgewater Advisors Inc.1,212$204K0.01%new13F-HRTimeline
Howard Capital Management, LLC1,161$204K<0.01%new13F-HRTimeline
McMillan Office, Inc.1,150$202K0.02%13F-HRTimeline
GTS SECURITIES LLC1,145$202K0.01%-2,19513F-HRTimeline
Boltwood Capital Management1,141$201K0.05%new13F-HRTimeline
Versant Capital Management, Inc1,065$187K0.02%+16913F-HRTimeline
Cladis Investment Advisory, LLC1,040$183K0.1%new13F-HRTimeline
Pinnacle Wealth Planning Services, Inc.1,020$180K0.02%new13F-HRTimeline
HORIZON BANCORP INC /IN/982$173K0.08%-4513F-HRTimeline
Steward Partners Investment Advisory, L…945$166K<0.01%-1713F-HRTimeline
PIN OAK INVESTMENT ADVISORS INC820$165K0.12%013F-HRTimeline
Mascoma Wealth Management LLC925$163K0.03%013F-HRTimeline
Nexus Investment Management ULC920$162K0.02%013F-HRTimeline
ACIMA PRIVATE WEALTH, LLC916$161K0.05%013F-HRTimeline
Legacy Bridge, LLC910$160K0.06%+3013F-HRTimeline
Manchester Capital Management LLC904$159K0.02%+2613F-HRTimeline
Bayforest Capital Ltd887$156K0.12%+45813F-HRTimeline
Wilmington Savings Fund Society, FSB867$153K<0.01%013F-HRTimeline
EASTERN BANK856$151K<0.01%013F-HRTimeline
Blue Trust, Inc.840$148K<0.01%-36213F-HRTimeline
Sava Infond d.o.o.825$145K0.02%013F-HRTimeline
STF Management LP804$141K0.13%-72113F-HRTimeline
Centennial Bank/AR/in group Centennial Bank/AR/800$141K0.06%013F-HRTimelineGroup
WHITTIER TRUST CO766$140K<0.01%-41013F-HRTimeline
MassMutual Private Wealth & Trust, FSB760$134K<0.01%+3413F-HRTimeline
Jessup Wealth Management, Inc727$128K0.04%new13F-HRTimeline
BNP PARIBASin group BNP PARIBAS700$123K<0.01%-10413F-HRTimelineGroup
Larson Financial Group LLC675$119K<0.01%+3713F-HRTimeline
TD Waterhouse Canada Inc.628$111K<0.01%-10613F-HRTimeline
ZIONS BANCORPORATION, NATIONAL ASSOCIAT…622$109K0.01%+11113F-HRTimeline
TCTC Holdings, LLCin group TCTC Holdings, LLC600$106K<0.01%013F-HRTimelineGroup
JNBA Financial Advisors596$105K0.01%-3013F-HRTimeline
Tidemark, LLC592$104K0.03%013F-HRTimeline
CoreFirst Bank & Trust590$104K0.06%-30413F-HRTimeline
Covestor Ltd582$103K0.05%-44313F-HRTimeline
Deseret Mutual Benefit Administrators551$97K0.04%-37813F-HRTimeline
Hanson & Doremus Investment Management525$92K0.01%013F-HRTimeline
ROTHSCHILD INVESTMENT LLC513$90.2K<0.01%+5613F-HRTimeline
Cromwell Holdings LLC511$89.9K0.05%013F-HRTimeline
Bogart Wealth, LLC509$89.6K<0.01%+19613F-HRTimeline
Curat Global, LLC503$88.5K0.1%013F-HRTimeline
Capital Analysts, LLCin group Capital Analysts, LLC501$88K<0.01%013F-HR/ATimelineGroup
Global Retirement Partners, LLC499$87.8K<0.01%+33713F-HRTimeline
Pflug Koory, LLC464$81.7K0.04%013F-HRTimeline
CVA Family Office, LLC464$81.7K0.01%013F-HRTimeline
TD PRIVATE CLIENT WEALTH LLC457$80.4K<0.01%+4313F-HRTimeline
PARADIGM ASSET MANAGEMENT CO LLC455$80.1K0.02%013F-HRTimeline
Lavaca Capital LLC447$78.7K0.01%013F-HRTimeline
RICHARDSON FINANCIAL SERVICES INC.437$76.9K0.02%013F-HRTimeline
CYBER HORNET ETFs LLC411$72.3K0.04%+2713F-HRTimeline
Key Financial Inc406$71.5K0.01%013F-HRTimeline
TRUST CO OF VERMONT389$68.5K<0.01%-66013F-HRTimeline
Greykasell Wealth Strategies, Inc.385$67.8K0.03%013F-HRTimeline
Caldwell Trust Co383$67.4K0.01%-1813F-HRTimeline
ARMSTRONG ADVISORY GROUP, INC356$62.7K<0.01%013F-HRTimeline
Ascentis Wealth Management, LLCin group Ascentis Wealth Management, L…349$61.4K0.01%013F-HRTimelineGroup
Prestige Wealth Management Group LLC346$60.9K0.01%+28213F-HRTimeline
Itau Unibanco Holding S.A.in group Itau Unibanco Holding S.A.337$59.3K<0.01%+6613F-HRTimelineGroup
Elyxium Wealth, LLC330$58.1K0.02%new13F-HRTimeline
MCF Advisors LLC324$57K<0.01%013F-HRTimeline
City State Bank322$56.7K0.02%-37013F-HRTimeline
SENTRY INVESTMENT MANAGEMENT LLC305$54K0.04%013F-HRTimeline
Vermillion Wealth Management, Inc.300$52.8K0.02%new13F-HRTimeline
Costello Asset Management, INC300$52.8K0.02%013F-HRTimeline
NFSG Corp300$52.8K0.01%013F-HRTimeline
Board of the Pension Protection Fund300$52.8K0.05%-1,10013F-HRTimeline
Trust Co291$51.2K<0.01%+12813F-HRTimeline
Aventura Private Wealth, LLC273$48K0.02%-9413F-HRTimeline
Golden State Wealth Management, LLC265$46.6K<0.01%013F-HRTimeline
Wilkerson Advisory Group LLC259$45.6K0.02%13F-HRTimeline
Arax Advisory Partners255$44.9K<0.01%-21,12613F-HRTimeline
WFA of San Diego, LLC253$44.5K0.03%013F-HRTimeline
Twin Lakes Capital Management, LLC250$44K0.02%013F-HRTimeline
GW&K Investment Management, LLC239$42K<0.01%013F-HRTimeline
True Wealth Design, LLC236$41.5K0.01%+313F-HRTimeline
Capital Advisors, Ltd. LLC232$41K<0.01%013F-HRTimeline
SHP Wealth Management223$39.2K<0.01%13F-HRTimeline
SUMMIT SECURITIES GROUP LLC219$38.5K0.01%+17013F-HRTimeline
HARBOUR INVESTMENTS, INC.215$37.8K<0.01%+813F-HRTimeline
WealthCollab, LLC206$36.3K0.01%013F-HRTimeline
DV EQUITIES, LLC205$36.1K0.01%13F-HRTimeline
VISION FINANCIAL MARKETS LLC200$35.2K0.04%013F-HRTimeline
ELEVATION WEALTH PARTNERS, LLC200$35.2K0.01%+16113F-HRTimeline
Strive Financial Group ,LLC200$35.2K0.02%13F-HR/ATimeline
GoalVest Advisory LLC198$34.8K0.01%new13F-HRTimeline
Quintet Private Bank (Europe) S.A.195$34.3K<0.01%-6013F-HRTimeline
Keating Financial Advisory Services, In…195$34.3K<0.01%13F-HRTimeline
MV CAPITAL MANAGEMENT, INC.194$34.1K<0.01%013F-HRTimeline
Root Financial Partners, LLC185$32.6K<0.01%+12313F-HRTimeline
Principia Wealth Advisory, LLC185$32.6K0.02%013F-HRTimeline
PRIVATE TRUST CO NA175$30.8K<0.01%+2013F-HRTimeline
FIRST HORIZON CORP169$29.7K<0.01%new13F-HRTimeline
CENTRAL TRUST Co163$28.7K<0.01%013F-HRTimeline
TOWARZYSTWO FUNDUSZY INWESTYCYJNYCH PZU…160$28.2K0.01%013F-HRTimeline