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Disclosery

BIIB BIOGEN INC

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Stock (common), issuer CIK 875045

983 managers (1,014 13F filers) reported a position in BIIB shares at 2026-03-31, 135,049,061 shares in all. 113 filers opened a position and 107 filers sold out during the quarter.

Managers
983
13F filers
1,014
New
113
Added
402
Reduced
290
Sold out
107
Shares held by filers
135,049,061

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, Q1 2026

Filers in the available 13F reports with a share position at 2026-03-31, 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
Trail Ridge Investment Advisors, LLC1,807$331K0.14%013F-HRTimeline
HANCOCK WHITNEY CORP1,735$328K0.01%-513F-HRTimeline
D'Orazio & Associates, Inc.1,777$326K0.04%new13F-HRTimeline
STEVENS CAPITAL MANAGEMENT LP1,774$325K0.05%new13F-HRTimeline
Integrated Advisors Network LLC1,767$324K0.02%-33713F-HRTimeline
OSTRUM ASSET MANAGEMENT1,767$324K0.02%-70913F-HRTimeline
UMB Bank, n.a.1,762$323K<0.01%+16313F-HRTimelineThe filing omitted confidential holdings, a later amendment may add them.
Abacus Planning Group, Inc.1,760$323K0.04%-7213F-HRTimeline
Pure Financial Advisors, LLC1,724$316K<0.01%+55113F-HRTimeline
CX Institutional1,725$316K0.01%+1913F-HRTimeline
Kera Capital Partners, Inc.1,723$316K0.04%+5813F-HRTimeline
Parallax Volatility Advisers, L.P.1,689$314K0.01%-54813F-HRTimeline
EP Wealth Advisors, LLC1,701$312K<0.01%-9913F-HRTimeline
PEAPACK GLADSTONE FINANCIAL CORP1,691$310K<0.01%+313F-HRTimeline
LVW Advisors, LLC1,689$310K0.03%new13F-HRTimeline
HUB Investment Partners, LLC1,685$309K0.01%new13F-HRTimeline
SUMITOMO LIFE INSURANCE CO1,672$307K0.01%+6713F-HRTimeline
AE Wealth Management LLC1,667$306K<0.01%-4713F-HRTimeline
Optas, LLC1,656$304K0.05%-5013F-HRTimeline
One Wealth Advisors, LLC1,655$303K0.04%+5113F-HRTimeline
Plancorp, LLC1,754$303K0.01%+1713F-HRTimeline
Moors & Cabot, Inc.1,653$303K0.01%+15413F-HRTimeline
CARY STREET PARTNERS ASSET MANAGEMENT L…group of 2 filers holding1,627$298K+25Timeline
MISSION WEALTH MANAGEMENT, LP1,621$297K0.01%-20113F-HRTimeline
Trust Asset Management LLC1,617$296K0.02%013F-HRTimeline
Joel Isaacson & Co., LLC1,614$296K0.01%+5013F-HRTimeline
Advisory Services Network, LLC1,612$295K<0.01%+4713F-HRTimeline
Prospera Financial Services Inc1,610$295K<0.01%-63013F-HRTimeline
Perigon Wealth Management, LLC1,600$293K0.01%+9813F-HRTimeline
JOURNEY STRATEGIC WEALTH LLC1,589$291K0.01%+14913F-HRTimeline
PFG Investments, LLC1,568$287K0.01%new13F-HRTimeline
EARNED WEALTH ADVISORS, LLC1,561$286K0.02%+1413F-HRTimeline
Engineers Gate Manager LP1,558$286K<0.01%new13F-HRTimeline
SBI Securities Co., Ltd.1,555$285K0.01%-22013F-HRTimeline
Turtle Creek Wealth Advisors, LLC1,546$283K0.02%+8413F-HRTimeline
Dorsey & Whitney Trust CO LLC1,546$283K0.02%+4013F-HRTimeline
POINCIANA ADVISORS GROUP, LLC1,541$283K0.22%013F-HRTimeline
Alpha Family Trustin group Alpha Family Trust1,540$282K0.14%013F-HRTimelineGroup
MATHER GROUP, LLC.1,534$281K<0.01%+25213F-HRTimeline
BERKSHIRE ASSET MANAGEMENT LLC/PA1,534$281K0.01%-113F-HRTimeline
Modern Wealth Management, LLC1,529$281K<0.01%-413F-HRTimeline
RIVERSEDGE ADVISORS, LLC1,529$280K0.05%+24113F-HRTimeline
KINGSWOOD WEALTH ADVISORS, LLC1,482$272K0.01%+5113F-HRTimeline
SIH Partners, LLLPin group SIH Partners, LLLP1,463$268K0.01%new13F-HRTimelineGroup
NorthRock Partners, LLC1,452$266K<0.01%-1713F-HRTimeline
Allegheny Financial Group1,450$266K0.04%+813F-HRTimeline
Prasad Wealth Partners, LLC1,450$266K0.07%-213F-HRTimeline
Apollon Wealth Management, LLCin group Apollon Wealth Management, LLC1,442$264K<0.01%+2113F-HRTimelineGroup
WELLINGTON-ALTUS USA INC.1,219$263K0.16%new13F-HRTimeline
MONECO ADVISORS, LLC1,436$263K0.02%+1713F-HRTimeline
Verdence Capital Advisors LLC1,414$259K0.02%+113F-HRTimeline
CIGNA INVESTMENTS INC /NEWin group CIGNA INVESTMENTS INC /NEW1,395$256K0.04%013F-HRTimelineGroup
Vinva Investment Management Ltd1,360$255K<0.01%new13F-HRTimeline
GTS SECURITIES LLC1,381$253K0.01%+23613F-HRTimeline
Composition Wealth, LLC1,377$252K<0.01%+10913F-HRTimeline
Financial Solutions Advisory Group, Inc.1,372$252K0.03%13F-HRTimeline
Phoenix Financial Ltd.in group Phoenix Financial Ltd.1,371$251K<0.01%-1,76213F-HRTimelineGroup
Ameritas Investment Partners, Inc.in group Ameritas Investment Partners,…1,336$245K0.01%013F-HRTimelineGroup
TWO SIGMA SECURITIES, LLC1,335$245K0.03%-4,09513F-HRTimeline
DRW Securities, LLC1,335$244K0.01%-62013F-HRTimeline
AlphaCore Capital LLC1,332$244K0.01%-1,22213F-HRTimeline
Versant Capital Management, Inc1,331$244K0.02%+26613F-HRTimeline
Livforsakringsbolaget Skandia, Omsesidi…1,330$244K0.01%013F-HRTimeline
Collaborative Fund Advisors, LLC1,327$243K0.15%13F-HRTimeline
Bridgewater Advisors Inc.1,223$243K0.01%+1113F-HRTimeline
WMS Group LLC1,311$240K0.35%-23913F-HRTimeline
MGO ONE SEVEN LLC1,309$240K<0.01%-94213F-HRTimeline
PKO Investment Management Joint-Stock Co1,300$238K0.02%-70013F-HRTimeline
State of Wyoming1,296$238K0.03%+313F-HRTimeline
PDS Planning, Inc1,294$237K0.02%+313F-HRTimeline
Aptus Capital Advisors, LLC1,288$236K<0.01%-28013F-HRTimeline
Financial Symmetry Inc1,248$236K0.08%new13F-HRTimeline
CLEAR WAVE WEALTH MANAGEMENT LLC1,280$235K0.06%13F-HRTimeline
Boltwood Capital Management1,274$234K0.06%+13313F-HRTimeline
DIVERSIFIED TRUST CO1,266$232K<0.01%new13F-HRTimeline
SageView Advisory Group, LLC1,265$232K0.01%+1213F-HRTimeline
MMBG INVESTMENT ADVISORS CO.1,248$229K0.02%013F-HRTimeline
JOHNSON INVESTMENT COUNSEL INC1,246$228K<0.01%-2313F-HRTimeline
PATTON FUND MANAGEMENT, INC.1,244$228K0.04%013F-HRTimeline
D.A. DAVIDSON & CO.1,218$223K<0.01%new13F-HRTimeline
Alphadyne Asset Management LP1,218$223K0.03%new13F-HRTimeline
Wealthspire Advisors, LLC1,209$222K<0.01%-84213F-HRTimeline
Analyst IMS Investment Management Servi…in group Analyst IMS Investment Manage…1,208$221K0.01%013F-HRTimelineGroup
Platform Technology Partners1,201$220K0.04%new13F-HRTimeline
Allegiance Financial Group Advisory Ser…1,200$220K0.04%new13F-HRTimeline
REGIONS FINANCIAL CORPin group REGIONS FINANCIAL CORP1,188$218K<0.01%-4913F-HRTimelineGroup
Independent Advisor Alliance1,186$217K<0.01%-4,80113F-HRTimeline
Aaron Wealth Advisors LLC1,185$217K0.01%new13F-HRTimeline
Western Wealth Management, LLC1,183$217K0.01%-7113F-HR/ATimeline
Basepoint Wealth LLC1,178$216K0.12%+1413F-HRTimeline
Rehmann Capital Advisory Group1,165$214K0.01%new13F-HRTimeline
Kingsview Wealth Management, LLC1,156$212K<0.01%new13F-HRTimeline
INVESTMENT HOUSE LLC1,155$212K0.01%-57513F-HRTimeline
NORTHWEST WEALTH MANAGEMENT, LLC1,152$211K0.03%new13F-HRTimeline
Tradewinds, LLC.1,129$211K0.07%new13F-HRTimeline
IFP Advisors, Inc1,151$211K<0.01%-5513F-HRTimeline
SYM FINANCIAL Corp1,150$211K0.02%new13F-HRTimeline
McMillan Office, Inc.1,150$211K0.03%013F-HRTimeline
Poehling Capital Management, INC.1,144$210K0.04%new13F-HRTimeline
SAPIENT CAPITAL LLC1,143$210K<0.01%new13F-HR/ATimeline
NWAM LLC1,141$209K0.01%new13F-HRTimeline
Probity Advisors, Inc.1,131$207K0.03%new13F-HRTimeline
Advyzon Investment Management, LLC1,129$207K0.02%-8313F-HRTimeline
New Age Alpha Advisors, LLC1,119$205K0.01%new13F-HRTimeline
Bell Bank1,109$203K0.01%new13F-HRTimeline
WEDBUSH SECURITIES INC1,108$203K0.01%new13F-HRTimeline
OneDigital Investment Advisors LLC1,101$202K<0.01%-29113F-HRTimeline
Lighthouse Financial LLC1,101$202K0.12%new13F-HRTimeline
TWINBEECH CAPITAL LP1,100$202K0.02%-1,73413F-HRTimeline
TRB Wealth Management, LLC1,097$201K0.03%13F-HRTimeline
Quotient Wealth Partners, LLC1,097$201K0.01%new13F-HRTimeline
Pinnacle Wealth Planning Services, Inc.1,030$189K0.02%+1013F-HRTimeline
HORIZON BANCORP INC /IN/1,017$186K0.09%+3513F-HRTimeline
Deseret Mutual Benefit Administrators943$173K0.06%+39213F-HRTimeline
Mascoma Wealth Management LLC927$170K0.04%+213F-HRTimeline
Nexus Investment Management ULC920$169K0.02%013F-HRTimeline
ACIMA PRIVATE WEALTH, LLC916$168K0.05%013F-HRTimeline
ROTHSCHILD INVESTMENT LLC909$167K0.01%+39613F-HRTimeline
Manchester Capital Management LLC901$165K0.02%-313F-HRTimeline
Steward Partners Investment Advisory, L…892$164K<0.01%-5313F-HRTimeline
Larson Financial Group LLC881$162K0.01%+20613F-HRTimeline
Legacy Bridge, LLC880$161K0.06%-3013F-HRTimeline
Wilmington Savings Fund Society, FSB867$159K<0.01%013F-HRTimeline
Sava Infond d.o.o.825$151K0.02%013F-HRTimeline
PIN OAK INVESTMENT ADVISORS INC820$150K0.11%013F-HRTimeline
Centennial Bank/AR/in group Centennial Bank/AR/800$147K0.05%013F-HRTimelineGroup
EASTERN BANK796$146K<0.01%-6013F-HRTimeline
Twin Tree Management, LP759$139K0.03%-11,51113F-HRTimeline
MassMutual Private Wealth & Trust, FSB750$137K<0.01%-1013F-HRTimeline
BNP PARIBASin group BNP PARIBAS700$128K<0.01%013F-HRTimelineGroup
TD Waterhouse Canada Inc.691$127K<0.01%+6313F-HRTimeline
WHITTIER TRUST CO699$120K<0.01%-6713F-HRTimeline
ASR Vermogensbeheer N.V.600$110K<0.01%new13F-HRTimeline
JNBA Financial Advisors596$109K0.01%013F-HRTimeline
Tidemark, LLC593$109K0.03%+113F-HRTimeline
Wilkerson Advisory Group LLC593$109K0.04%+33413F-HRTimeline
CVA Family Office, LLC581$107K0.01%+11713F-HRTimeline
SALEM INVESTMENT COUNSELORS INC566$104K<0.01%new13F-HR/ATimeline
Blue Trust, Inc.560$103K<0.01%-28013F-HRTimeline
Arax Advisory Partners515$98K<0.01%+26013F-HRTimeline
Hanson & Doremus Investment Management525$96K0.01%013F-HRTimeline
Cromwell Holdings LLC515$94.4K0.05%+413F-HRTimeline
Curat Global, LLC503$92.2K0.09%013F-HRTimeline
Capital Analysts, LLCin group Capital Analysts, LLC501$92K<0.01%013F-HRTimelineGroup
Encore Global Management, LP500$91.7K0.06%13F-HRTimeline
Pflug Koory, LLC464$85.1K0.04%013F-HRTimeline
PARADIGM ASSET MANAGEMENT CO LLC455$83.4K0.02%013F-HRTimeline
Lavaca Capital LLC447$81.9K0.02%013F-HRTimeline
RICHARDSON FINANCIAL SERVICES INC.437$80.1K0.05%013F-HRTimeline
Ascentis Wealth Management, LLCgroup of 2 filers holding419$76.8K+70Timeline
Key Financial Inc406$74.4K0.01%013F-HRTimeline
CYBER HORNET ETFs LLC403$74.1K0.05%-813F-HRTimeline
Greykasell Wealth Strategies, Inc.385$70.6K0.03%013F-HRTimeline
Caldwell Trust Co383$70.2K0.01%013F-HRTimeline
Wealth Enhancement Trust Services, Inc.380$69.7K0.01%new13F-HRTimeline
Itau Unibanco Holding S.A.in group Itau Unibanco Holding S.A.349$64K<0.01%+1213F-HR/ATimelineGroup
MCF Advisors LLC346$63.4K<0.01%+2213F-HRTimeline
Prestige Wealth Management Group LLC346$63.4K0.01%013F-HRTimeline
ZIONS BANCORPORATION, NATIONAL ASSOCIAT…346$63.4K<0.01%-27613F-HRTimeline
Root Financial Partners, LLC341$62.5K<0.01%+15613F-HRTimeline
TopTier Wealth Management, LLC336$61.6K0.04%new13F-HRTimeline
LRI Investments, LLC333$61.1K0.01%+28113F-HRTimeline
City State Bank322$59K0.02%013F-HRTimeline
HARBOUR INVESTMENTS, INC.320$58.7K<0.01%+10513F-HRTimeline
Vermillion Wealth Management, Inc.310$56.8K0.02%+1013F-HRTimeline
True Wealth Design, LLC305$55.9K0.02%+6913F-HRTimeline
Costello Asset Management, INC300$55K0.02%013F-HRTimeline
NFSG Corp300$55K0.01%013F-HRTimeline
Aster Capital Management (DIFC) Ltd398$54.5K0.02%-10,08913F-HRTimeline
CoreFirst Bank & Trust295$54.1K0.03%-29513F-HRTimeline
Covestor Ltd293$54K0.04%-28913F-HRTimeline
Trust Co291$53.3K<0.01%013F-HRTimeline
Golden State Wealth Management, LLC260$47.7K0.01%-513F-HRTimeline
Aventura Private Wealth, LLC260$47.7K0.02%-1313F-HRTimeline
Opal Wealth Advisors, LLC256$46.9K0.01%new13F-HRTimeline
CoreCap Advisors, LLC254$46.6K<0.01%-3,02213F-HRTimeline
WFA of San Diego, LLC251$46K0.04%-213F-HRTimeline
SHP Wealth Management242$44.3K<0.01%+1913F-HRTimeline
GW&K Investment Management, LLC239$44K<0.01%013F-HRTimeline
Capital Advisors, Ltd. LLC232$43K<0.01%013F-HRTimeline
Keating Financial Advisory Services, In…228$41.8K0.01%+3313F-HRTimeline
Ancora Advisors LLCin group Ancora Advisors LLC224$41.1K<0.01%+10013F-HRTimelineGroup
Wall Street Financial Group, Inc.224$41.1K0.02%new13F-HRTimeline
Cassaday & Co Wealth Management LLC218$40K<0.01%new13F-HRTimeline
Bogart Wealth, LLC215$39.4K<0.01%-29413F-HRTimeline
WealthCollab, LLC206$37.8K0.02%013F-HRTimeline
ELEVATION WEALTH PARTNERS, LLC204$37.4K0.01%+413F-HRTimeline
Smithfield Trust Co206$37K<0.01%+20013F-HRTimeline
Strive Financial Group ,LLC200$37K0.02%013F-HRTimeline
PRIVATE TRUST CO NA200$36.7K<0.01%+2513F-HRTimeline
VISION FINANCIAL MARKETS LLC200$36.7K0.04%013F-HRTimeline
GoalVest Advisory LLC198$36.3K0.01%013F-HRTimeline
Intentional Wealth Strategies, LLC198$36.3K0.03%13F-HRTimeline
Quintet Private Bank (Europe) S.A.195$35.7K<0.01%013F-HRTimeline
WPG Advisers, LLC189$34.6K0.03%+4413F-HRTimeline
Principia Wealth Advisory, LLC186$34.1K0.02%+113F-HRTimeline
MV CAPITAL MANAGEMENT, INC.185$33.9K<0.01%-913F-HRTimeline
Owl Creek Wealth Partners LLC185$33.9K0.01%13F-HRTimeline
FIRST HORIZON CORP181$33.2K<0.01%+1213F-HRTimeline
CENTRAL TRUST Co163$29.9K<0.01%013F-HRTimeline