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Disclosery

BIIB BIOGEN INC

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Stock (common), issuer CIK 875045

1,014 managers (1,047 13F filers) reported a position in BIIB shares at 2026-06-30, 142,281,347 shares in all. 112 filers opened a position and 82 filers sold out during the quarter.

Managers
1,014
13F filers
1,047
New
112
Added
427
Reduced
297
Sold out
82
Shares held by filers
142,281,347

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, Q2 2026

Filers in the available 13F reports with a share position at 2026-06-30, 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
JACKSON THORNTON WEALTH MANAGEMENT, LLC1,829$395K0.03%new13F-HRTimeline
Trail Ridge Investment Advisors, LLC1,807$390K0.16%013F-HRTimeline
S-Bank Fund Management Ltd1,792$387K0.05%new13F-HRTimeline
Waterfront Wealth Inc.1,943$387K0.06%-80413F-HRTimeline
Kera Capital Partners, Inc.1,772$383K0.04%+4913F-HRTimeline
EXCHANGE TRADED CONCEPTS, LLC1,770$382K<0.01%-5313F-HR/ATimeline
OSTRUM ASSET MANAGEMENT1,767$382K0.02%013F-HRTimeline
Perigon Wealth Management, LLC1,761$380K0.01%+16113F-HRTimeline
RIVERSEDGE ADVISORS, LLC1,746$377K0.05%+21713F-HRTimeline
Abacus Planning Group, Inc.1,738$376K0.05%-2213F-HRTimeline
HUB Investment Partners, LLC1,735$375K0.01%+5013F-HRTimeline
HANCOCK WHITNEY CORP1,726$373K0.01%-913F-HRTimeline
EntryPoint Capital, LLC1,716$371K0.09%new13F-HRTimeline
CX Institutional1,701$368K0.01%-2413F-HRTimeline
Philip James Wealth Mangement, LLC1,702$368K0.04%-62113F-HRTimeline
PEAPACK GLADSTONE FINANCIAL CORP1,699$367K<0.01%+813F-HRTimeline
CARY STREET PARTNERS ASSET MANAGEMENT L…group of 2 filers holding1,693$366K+66Timeline
ALPS ADVISORS INCin group ALPS ADVISORS INC1,692$366K<0.01%new13F-HRTimelineGroup
Prospera Financial Services Inc1,692$366K0.01%+8213F-HRTimeline
Optas, LLC1,685$364K0.05%+2913F-HRTimeline
Advisory Services Network, LLC1,672$361K<0.01%+6013F-HRTimeline
Plancorp, LLC1,726$361K0.01%-2813F-HRTimeline
AFFINITY INVESTMENT ADVISORS, LLC1,663$359K0.18%new13F-HRTimeline
Moors & Cabot, Inc.1,658$358K0.01%+513F-HRTimeline
SUMITOMO LIFE INSURANCE CO1,648$356K0.01%-2413F-HRTimeline
Investors Research Corp1,641$355K0.06%-20913F-HRTimeline
AE Wealth Management LLC1,633$353K<0.01%-3413F-HRTimeline
PFG Investments, LLC1,633$353K0.01%+6513F-HRTimeline
Modern Wealth Management, LLC1,625$351K<0.01%+9613F-HRTimeline
Trust Asset Management LLC1,617$349K0.02%013F-HR/ATimeline
Joel Isaacson & Co., LLC1,614$349K0.01%013F-HRTimeline
Wealthspire Advisors, LLC1,607$347K<0.01%+39813F-HRTimeline
Turtle Creek Wealth Advisors, LLC1,599$345K0.02%+5313F-HRTimeline
One Wealth Advisors, LLC1,599$345K0.04%-5613F-HRTimeline
MATHER GROUP, LLC.1,588$343K<0.01%+5413F-HRTimeline
KINGSWOOD WEALTH ADVISORS, LLC1,562$337K0.01%+8013F-HRTimeline
Fulcrum Asset Management LLP1,546$335K0.03%new13F-HRTimeline
Dorsey & Whitney Trust CO LLC1,549$335K0.02%+313F-HRTimeline
POINCIANA ADVISORS GROUP, LLC1,541$333K0.25%013F-HRTimeline
Alpha Family Trustin group Alpha Family Trust1,540$333K0.13%013F-HRTimelineGroup
Versant Capital Management, Inc1,539$333K0.03%+20813F-HRTimeline
BERKSHIRE ASSET MANAGEMENT LLC/PA1,534$331K0.01%013F-HRTimeline
UMB Bank, n.a.1,524$329K<0.01%-23813F-HRTimelineThe filing omitted confidential holdings, a later amendment may add them.
Boltwood Capital Management1,489$322K0.07%+21513F-HRTimeline
D'Orazio & Associates, Inc.1,481$320K0.04%-29613F-HRTimeline
MONECO ADVISORS, LLC1,480$320K0.02%+4413F-HRTimeline
IFP Advisors, Inc1,479$320K0.01%+32813F-HRTimeline
Allegheny Financial Group1,472$318K0.03%+2213F-HRTimeline
SBI Securities Co., Ltd.1,471$318K0.01%-8413F-HRTimeline
NorthRock Partners, LLC1,467$317K<0.01%+1513F-HRTimeline
Phoenix Financial Ltd.in group Phoenix Financial Ltd.1,457$315K<0.01%+8613F-HRTimelineGroup
Prasad Wealth Partners, LLC1,450$313K0.08%013F-HRTimeline
Rydar Equities, Inc.1,522$312K0.18%new13F-HRTimeline
Pure Financial Advisors, LLC1,438$311K<0.01%-28613F-HRTimeline
IFG Advisory, LLC1,425$308K0.01%new13F-HRTimeline
Composition Wealth, LLC1,421$307K<0.01%+4413F-HRTimeline
Verdence Capital Advisors LLC1,418$306K0.02%+413F-HRTimeline
JMN Financial LLC1,411$305K0.24%new13F-HRTimeline
Polymer Capital Management (US) LLC1,404$303K0.04%new13F-HRTimeline
Keebeck Wealth Management1,395$301K0.03%new13F-HRTimeline
CIGNA INVESTMENTS INC /NEWin group CIGNA INVESTMENTS INC /NEW1,395$301K0.04%013F-HRTimelineGroup
Integrated Advisors Network LLC1,355$293K0.01%-41213F-HRTimeline
Essential Partners LLC1,355$293K0.13%-4,36413F-HRTimeline
MGO ONE SEVEN LLC1,347$291K<0.01%+3813F-HRTimeline
Noble Wealth Partners LLC1,340$290K0.25%13F-HRTimeline
Livforsakringsbolaget Skandia, Omsesidi…1,330$287K0.01%013F-HRTimeline
Applied Finance Capital Management, LLC1,324$286K0.02%-51813F-HRTimeline
PDS Planning, Inc1,310$283K0.02%+1613F-HRTimeline
CLEAR WAVE WEALTH MANAGEMENT LLC1,304$282K0.06%+2413F-HRTimeline
VestGen Advisors, LLC1,302$281K0.01%-36013F-HRTimeline
Valeo Financial Advisors, LLC1,301$281K0.01%new13F-HRTimeline
Allegiance Financial Group Advisory Ser…1,289$279K0.05%+8913F-HRTimeline
Soltis Investment Advisors LLC1,283$277K0.02%new13F-HRTimeline
OneDigital Investment Advisors LLC1,283$277K<0.01%+18213F-HRTimeline
SageView Advisory Group, LLC1,263$273K0.01%-213F-HRTimeline
Ameritas Investment Partners, Inc.in group Ameritas Investment Partners,…1,262$273K0.01%-7413F-HRTimelineGroup
INCEPTIONR LLC1,261$272K0.07%-98713F-HRTimeline
Independent Advisor Alliance1,261$272K0.01%+7513F-HRTimeline
Financial Solutions Advisory Group, Inc.1,368$272K0.03%-413F-HRTimeline
NORTHWEST WEALTH MANAGEMENT, LLC1,255$271K0.04%+10313F-HRTimeline
Fieldview Capital Management, LLC1,250$270K0.08%-16,40913F-HRTimeline
MMBG INVESTMENT ADVISORS CO.1,248$270K0.02%013F-HRTimeline
Financial Symmetry Inc1,248$270K0.09%013F-HRTimeline
Rehmann Capital Advisory Group1,236$267K0.01%+7113F-HRTimeline
Clearstead Advisors, LLC1,217$263K<0.01%-1,30613F-HRTimeline
JOHNSON INVESTMENT COUNSEL INC1,216$263K<0.01%-3013F-HRTimeline
REGIONS FINANCIAL CORPin group REGIONS FINANCIAL CORP1,192$258K<0.01%+413F-HRTimelineGroup
SYM FINANCIAL Corp1,186$256K0.02%+3613F-HRTimeline
Capstone Wealth Management, LLC1,185$256K0.12%new13F-HRTimeline
Tower Research Capital LLC (TRC)in group Tower Research Capital LLC (T…1,184$256K0.01%-97513F-HRTimelineGroup
Prosperity Consulting Group, LLC1,182$255K0.01%new13F-HRTimeline
Kingsview Wealth Management, LLC1,171$253K<0.01%+1513F-HRTimeline
D.A. DAVIDSON & CO.1,164$251K<0.01%-5413F-HRTimeline
WEDBUSH SECURITIES INC1,164$251K0.01%+5613F-HRTimeline
Aptus Capital Advisors, LLC1,156$250K<0.01%-13213F-HRTimeline
INVESTMENT HOUSE LLC1,155$250K0.01%013F-HR/ATimeline
LVW Advisors, LLC1,154$249K0.02%-53513F-HRTimeline
DIVERSIFIED TRUST CO1,154$249K<0.01%-11213F-HRTimeline
McMillan Office, Inc.1,150$248K0.03%013F-HRTimeline
Bridgewater Advisors Inc.1,241$248K0.01%+1813F-HRTimeline
Probity Advisors, Inc.1,142$247K0.04%+1113F-HRTimeline
Platform Technology Partners1,136$245K0.04%-6513F-HRTimeline
Foundations Investment Advisors, LLC1,123$243K<0.01%new13F-HRTimeline
New Age Alpha Advisors, LLC1,119$242K0.01%013F-HRTimeline
Bell Bank1,109$240K0.01%013F-HRTimeline
Lighthouse Financial LLC1,100$238K0.12%-113F-HRTimeline
TRB Wealth Management, LLC1,097$237K0.03%013F-HRTimeline
Western Wealth Management, LLC1,088$235K0.01%-9513F-HRTimeline
STEPHENS INC /AR/in group Stephens Investment Managemen…1,086$235K<0.01%new13F-HRTimelineGroup
Global Retirement Partners, LLC1,085$234K<0.01%13F-HRTimeline
EADS & HEALD WEALTH MANAGEMENT1,081$234K0.11%new13F-HRTimeline
EagleClaw Capital Managment, LLC1,079$233K0.03%new13F-HRTimeline
TRUST POINT INC.1,078$233K0.02%new13F-HRTimeline
Basepoint Wealth LLC1,074$232K0.13%-10413F-HRTimeline
Essex Financial Services, Inc.in group Essex Financial Services, Inc.1,072$232K0.01%new13F-HRTimelineGroup
MONETA GROUP INVESTMENT ADVISORS LLC1,069$231K<0.01%new13F-HRTimeline
Claret Asset Management Corp1,063$230K0.02%-77113F-HRTimeline
May Hill Capital, LLC1,061$229K0.05%new13F-HRTimeline
PROATHLETE WEALTH MANAGEMENT LLC1,060$229K0.06%-88413F-HRTimeline
Israel Discount Bank of New York1,055$228K0.42%new13F-HRTimeline
Rothschild Wealth LLC1,052$227K0.02%new13F-HRTimeline
Quotient Wealth Partners, LLC1,047$226K0.01%-5013F-HRTimeline
Cladis Investment Advisory, LLC1,040$225K0.11%new13F-HRTimeline
Mason & Associates Inc1,038$224K0.04%new13F-HRTimeline
Pinnacle Wealth Planning Services, Inc.1,033$223K0.02%+313F-HRTimeline
INVESTORS ASSET MANAGEMENT OF GEORGIA I…1,032$223K0.08%new13F-HRTimeline
R2 Capital Strategies, LLC1,030$223K0.1%13F-HRTimeline
Advisors Capital Management, LLC1,020$220K<0.01%new13F-HRTimeline
BURNS J W & CO INC/NY1,000$216K0.02%new13F-HRTimeline
J. L. Bainbridge & Co., Inc.1,000$216K0.02%new13F-HRTimeline
Advyzon Investment Management, LLC1,000$216K0.02%-12913F-HRTimeline
Corecam Pte. Ltd.1,000$216K0.08%new13F-HRTimeline
Vantus Wealth LLC994$215K0.12%13F-HRTimeline
Abundance Wealth Counselors992$214K0.01%new13F-HRTimeline
KEYNOTE FINANCIAL SERVICES LLC977$211K0.1%new13F-HRTimeline
HORIZON BANCORP INC /IN/973$210K0.1%-4413F-HRTimeline
Fiduciary Trust Coin group Fiduciary Trust Co959$207K<0.01%new13F-HRTimelineGroup
DAYMARK WEALTH PARTNERS, LLC956$207K0.01%new13F-HRTimeline
WATERS PARKERSON & CO., LLC951$205K0.01%new13F-HRTimeline
Sarissa Capital Management LP950$205K0.12%new13F-HRTimeline
Supplemental Annuity Collective Trust o…947$205K0.05%new13F-HRTimeline
NORDEN GROUP LLC945$204K0.02%new13F-HRTimeline
MAINSAIL ASSET MANAGEMENT, LLC991$204K0.08%new13F-HRTimeline
Range Advisory, LLC929$201K0.02%new13F-HRTimeline
Mascoma Wealth Management LLC927$200K0.04%013F-HRTimeline
Larson Financial Group LLC924$200K0.01%+4313F-HRTimeline
Nexus Investment Management ULC920$199K0.03%013F-HRTimeline
ACIMA PRIVATE WEALTH, LLC916$198K0.06%013F-HRTimeline
Manchester Capital Management LLC905$196K0.03%+413F-HRTimeline
Wilmington Savings Fund Society, FSB889$192K<0.01%+2213F-HRTimeline
Legacy Bridge, LLC880$190K0.06%013F-HRTimeline
CoreCap Advisors, LLC858$185K0.01%+60413F-HRTimeline
Sava Infond d.o.o.825$178K0.01%013F-HRTimeline
PIN OAK INVESTMENT ADVISORS INC821$177K0.13%+113F-HR/ATimeline
Centennial Bank/AR/in group Centennial Bank/AR/800$173K0.06%013F-HRTimelineGroup
EASTERN BANK796$172K<0.01%013F-HRTimeline
Deseret Mutual Benefit Administrators775$167K0.05%-16813F-HRTimeline
MassMutual Private Wealth & Trust, FSB733$158K<0.01%-1713F-HRTimeline
WHITTIER TRUST CO699$146K<0.01%013F-HRTimeline
LOS ANGELES CAPITAL MANAGEMENT LLC674$146K<0.01%-34,68413F-HRTimeline
Wilkerson Advisory Group LLC672$145K0.04%+7913F-HRTimeline
TD Waterhouse Canada Inc.690$145K<0.01%-113F-HRTimeline
Bayforest Capital Ltd667$144K0.13%new13F-HRTimeline
SALEM INVESTMENT COUNSELORS INC599$129K<0.01%+3313F-HRTimeline
Tidemark, LLC593$128K0.03%013F-HRTimeline
CVA Family Office, LLC592$128K0.01%+1113F-HRTimeline
Alpine Bank Wealth Managementin group Alpine Bank Wealth Management545$118K0.02%new13F-HRTimelineGroup
Cromwell Holdings LLC535$116K0.05%+2013F-HRTimeline
Hanson & Doremus Investment Management525$113K0.01%013F-HRTimeline
Groupe la Francaisein group Groupe la Francaise519$112K<0.01%new13F-HRTimelineGroup
LRI Investments, LLC514$111K0.01%+18113F-HRTimeline
Blue Trust, Inc.507$110K<0.01%-5313F-HRTimeline
Encore Global Management, LP500$108K0.11%013F-HRTimeline
Capital Analysts, LLCin group Capital Analysts, LLC501$108K<0.01%013F-HRTimelineGroup
Curat Global, LLC503$107K0.09%013F-HRTimeline
Wealth Enhancement Trust Services, Inc.468$101K0.01%+8813F-HR/ATimeline
Pflug Koory, LLC464$100K0.04%013F-HRTimeline
PARADIGM ASSET MANAGEMENT CO LLC455$98.3K0.02%013F-HRTimeline
Lavaca Capital LLC447$96.6K0.01%013F-HRTimeline
ARMSTRONG ADVISORY GROUP, INC443$95.7K0.01%new13F-HRTimeline
FIRST HORIZON CORP438$94.6K<0.01%+25713F-HRTimeline
RICHARDSON FINANCIAL SERVICES INC.437$94.4K0.05%013F-HRTimeline
JNBA Financial Advisors422$91.2K0.01%-17413F-HRTimeline
Key Financial Inc406$87.7K0.01%013F-HRTimeline
CYBER HORNET ETFs LLC403$87.1K0.05%013F-HRTimeline
TRUST CO OF VERMONT389$84K<0.01%13F-HRTimeline
Greykasell Wealth Strategies, Inc.385$83.2K0.03%013F-HRTimeline
Caldwell Trust Co383$82.8K0.01%013F-HRTimeline
MCF Advisors LLC381$82.3K<0.01%+3513F-HRTimeline
True Wealth Design, LLC365$78.9K0.02%+6013F-HRTimeline
ZIONS BANCORPORATION, NATIONAL ASSOCIAT…361$78K<0.01%+1513F-HRTimeline
Prestige Wealth Management Group LLC350$75.6K0.01%+413F-HRTimeline
Ascentis Wealth Management, LLCgroup of 2 filers holding349$75.4K-70Timeline
Itau Unibanco Holding S.A.in group Itau Unibanco Holding S.A.348$75.2K<0.01%-113F-HRTimelineGroup
Bellevue Group AGin group Bellevue Group AG338$73K<0.01%-3,31513F-HRTimelineGroup
Institute for Wealth Management, LLC.326$70.5K0.01%new13F-HRTimeline
HARBOUR INVESTMENTS, INC.325$70.2K<0.01%+513F-HRTimeline
City State Bank322$69.6K0.02%013F-HRTimeline
Fortitude Family Office, LLC315$68.1K0.01%+24613F-HRTimeline
Continuum Advisory, LLC304$65.7K0.01%new13F-HRTimeline