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Stock / equity

BIIB BIOGEN INC.

Company
BIOGEN INC.
Security
Equity
Size, estimated from filings
Large cap ($10B – $200B)
Insiders on record
20
Members of Congress
4
Latest trade on record
October 2, 2026

BIIB (BIOGEN INC.) has 124 disclosed insider transactions from 20 insiders in the last 12 months (1 open-market buy, 36 sales, about $7.7M at reported prices) and 9 congressional trades from 4 members of Congress. The most recent disclosure was filed October 7, 2026.

Last updated October 7, 2026 · Sources: SEC EDGAR Form 4; House Clerk and Senate eFD PTRs

Insider txns (12m)
124
Open-market buys / sales
1 / 36
Congress trades (12m)
9
Distinct filers (12m)
24

Share price

Price and chart by TradingView for BIOGEN INC.. US share prices here are delayed, not real-time. The trade records on this page come from government filings, not from this chart.

BIIB in charts

Who is trading this stock

Which people account for the buying and selling over the last 12 months?

BoughtSold

8 people account for the disclosed buying and selling in BIIB over the last 12 months; the most active is Viehbacher Christopher with $2.8M.

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Prices insiders traded at

What price did insiders buy and sell at? Each marker is one open-market trade at the share price reported on its Form 4.

▲ Bought▼ SoldAverage reported price that day
$170$180$190$200$210Feb 2026Aug 2026
$170$180$190$200$210Feb 2026Aug 2026

Insiders reported 5 open-market trades in BIIB since Feb 2, 2026, at prices from $179 to $203; the most recent was a sale at $201 on Aug 4, 2026. These are the prices on the filings, not adjusted for stock splits, and not a market price series.

Insider holdings over time

Is an insider building or unwinding a position? Shares held directly after each filing.

Godbout SeanMinor Lloyd
02K4K1K3K2025-10-062026-10-05

Godbout Sean reported 1,459 shares held after the latest filing, against 495 at the first on record.

Lobbying spend by quarter

How much has BIOGEN INC. reported spending on federal lobbying?

Q1 25Q2 25Q3 25Q4 25Q1 26Q2 26Q3 26Q4 26
Q1 25Q2 25Q3 25Q4 25Q1 26Q2 26Q3 26Q4 26

BIOGEN INC. reported $5.1M in lobbying over the last eight quarters, from filings matched by exact company name.

Insiders trading BIIB

Everyone who filed a Form 4 for this ticker, by number of rows on record. "Bought" and "sold" count open-market purchases (code P) and sales only; awards, option exercises and shares withheld for tax are in the row count but not in those two columns. Showing 15 of 20.

InsiderRoleRowsBoughtSoldValue boughtValue soldLatest
Godbout SeanChief Accounting Officer2006—$85KOctober 2, 2026
Singhal PriyaHead of Development1205—$1.3MFebruary 13, 2026
Murphy NicoleHead of Pharm Ops and Tech1113$585$672KFebruary 13, 2026
Keeney AdamHead of Corporate Development1003—$404KMay 1, 2026
ALEXANDER SUSAN HEVP Chief Legal Officer1003—$705KFebruary 13, 2026
Gregory GingerEVP, Human Resources1003—$521KFebruary 13, 2026
Grogan JaneHead of Research1003—$251KFebruary 13, 2026
Izzar RachidHead of Global Product Strat.1003—$410KFebruary 13, 2026
Kramer RobinChief Financial Officer1003—$310KFebruary 13, 2026
Viehbacher ChristopherPresident and CEO1003—$2.8MFebruary 13, 2026
Minor LloydDirector302—$240KAugust 4, 2026
Pangalos Menelas NDirector300——June 9, 2026
Parini MichaelChief Legal Officer100——September 1, 2026
Freire Maria CDirector100——June 9, 2026
HAWKINS WILLIAM ADirector100——June 9, 2026
What kind of transactions these are 5 Form 4 codes
CodeMeaningRowsSharesValue at reported prices
MOption exercise or conversion68181,462—
FShares withheld for tax3334,242$6.8M
AGrant or award21132,160—
SOpen-market sale44,594$905K
POpen-market purchase13$585

What each code means: Form 4 transaction codes.

Members of Congress trading BIIB

Members whose periodic transaction reports name this ticker. Amounts are the sums of the ranges as filed.

MemberSeatTradesBoughtSoldRange as filedLatest
Maria Elvira SalazarRepresentative (FL, District 27), Republican532$68K–$195KSeptember 24, 2026
Gilbert Ray Cisneros, Jr.Representative (CA, District 31), Democrat220$2,002–$30KJune 5, 2026
Kevin HernRepresentative (OK, District 1), Republican101$1,001–$15KAugust 18, 2026
Alan ArmstrongSenator (OK), Republican110$1,001–$15KMarch 27, 2026

Download CSV136 rows · 44 KB · insider and congressional rows for this ticker · all downloads

Insider transactions

FilerSideTrade dateDisclosedLagSharesPriceValueFlagsSourceShare
Godbout SeanOption / conversion MOctober 2, 2026October 5, 20263d27——derivativeForm 4 ↗
Godbout SeanOther AOctober 1, 2026October 5, 20264d985——derivativeForm 4 ↗
Godbout SeanSell FOctober 2, 2026October 5, 20263d8$220$1,759Form 4 ↗
Godbout SeanOption / conversion MOctober 2, 2026October 5, 20263d27——Form 4 ↗
Parini MichaelOther ASeptember 1, 2026September 3, 20262d7,405——derivativeForm 4 ↗
Minor LloydSell SAugust 4, 2026August 5, 20261d593$201$119K10b5-1 planForm 4 ↗
Minor LloydSell SAugust 3, 2026August 5, 20262d593$203$121K10b5-1 planForm 4 ↗
HAWKINS WILLIAM AOther AJune 9, 2026June 11, 20262d1,505——Form 4 ↗
SHERWIN STEPHEN AOther AJune 9, 2026June 11, 20262d1,505——Form 4 ↗
Rowinsky Eric KOther AJune 9, 2026June 11, 20262d1,505——Form 4 ↗
Mantas Jesus BOther AJune 9, 2026June 11, 20262d1,505——Form 4 ↗
LANGER SUSANOther AJune 9, 2026June 11, 20262d1,505——Form 4 ↗
Patolawala Monish DOther AJune 9, 2026June 11, 20262d1,505——Form 4 ↗
Pangalos Menelas NOption / conversion MJune 9, 2026June 11, 20262d2,370——derivativeForm 4 ↗
Pangalos Menelas NOther AJune 9, 2026June 11, 20262d1,505——Form 4 ↗
Pangalos Menelas NOption / conversion MJune 9, 2026June 11, 20262d2,370——Form 4 ↗
Minor LloydOther AJune 9, 2026June 11, 20262d1,505——Form 4 ↗
Freire Maria COther AJune 9, 2026June 11, 20262d2,005——Form 4 ↗
Keeney AdamOption / conversion MMay 1, 2026May 5, 20264d939——derivativeForm 4 ↗
Keeney AdamSell FMay 1, 2026May 5, 20264d455$187$85KForm 4 ↗
Keeney AdamOption / conversion MMay 1, 2026May 5, 20264d939——Form 4 ↗
Godbout SeanOption / conversion MApril 1, 2026April 3, 20262d181——derivativeForm 4 ↗
Godbout SeanSell FApril 1, 2026April 3, 20262d54$184$9,924Form 4 ↗
Godbout SeanOption / conversion MApril 1, 2026April 3, 20262d181——Form 4 ↗
Viehbacher ChristopherOther AFebruary 13, 2026February 17, 20264d38,015——derivativeForm 4 ↗
Singhal PriyaOther AFebruary 13, 2026February 17, 20264d10,560——derivativeForm 4 ↗
Murphy NicoleOther AFebruary 13, 2026February 17, 20264d10,560——derivativeForm 4 ↗
Murphy NicoleBuy PFebruary 12, 2026February 17, 20265d3$195$585lateForm 4 ↗
Kramer RobinOther AFebruary 13, 2026February 17, 20264d8,450——derivativeForm 4 ↗
Keeney AdamOther AFebruary 13, 2026February 17, 20264d8,025——derivativeForm 4 ↗
Izzar RachidOther AFebruary 13, 2026February 17, 20264d7,390——derivativeForm 4 ↗
Grogan JaneOther AFebruary 13, 2026February 17, 20264d8,450——derivativeForm 4 ↗
Gregory GingerOther AFebruary 13, 2026February 17, 20264d8,025——derivativeForm 4 ↗
Godbout SeanOther AFebruary 13, 2026February 17, 20264d1,800——derivativeForm 4 ↗
ALEXANDER SUSAN HOther AFebruary 13, 2026February 17, 20264d8,450——derivativeForm 4 ↗
Viehbacher ChristopherOption / conversion MFebruary 6, 2026February 10, 20264d15,453——derivativeForm 4 ↗
Viehbacher ChristopherOption / conversion MFebruary 6, 2026February 10, 20264d9,008——derivativeForm 4 ↗
Viehbacher ChristopherSell FFebruary 6, 2026February 10, 20264d6,624$201$1.3MForm 4 ↗
Viehbacher ChristopherOption / conversion MFebruary 6, 2026February 10, 20264d15,453——Form 4 ↗
Viehbacher ChristopherSell FFebruary 6, 2026February 10, 20264d4,356$201$876KForm 4 ↗
Viehbacher ChristopherOption / conversion MFebruary 6, 2026February 10, 20264d9,008——Form 4 ↗
Singhal PriyaOption / conversion MFebruary 6, 2026February 10, 20264d4,683——10b5-1 planderivativeForm 4 ↗
Singhal PriyaOption / conversion MFebruary 6, 2026February 10, 20264d2,217——10b5-1 planderivativeForm 4 ↗
Singhal PriyaSell SFebruary 9, 2026February 10, 20261d2,660$200$532K10b5-1 planForm 4 ↗
Singhal PriyaSell FFebruary 6, 2026February 10, 20264d1,412$201$284K10b5-1 planForm 4 ↗
Singhal PriyaOption / conversion MFebruary 6, 2026February 10, 20264d4,683——10b5-1 planForm 4 ↗
Singhal PriyaSell FFebruary 6, 2026February 10, 20264d1,056$201$212K10b5-1 planForm 4 ↗
Singhal PriyaOption / conversion MFebruary 6, 2026February 10, 20264d2,217——10b5-1 planForm 4 ↗
Murphy NicoleOption / conversion MFebruary 6, 2026February 10, 20264d4,683——derivativeForm 4 ↗
Murphy NicoleOption / conversion MFebruary 6, 2026February 10, 20264d1,940——derivativeForm 4 ↗
Murphy NicoleOption / conversion MFebruary 6, 2026February 10, 20264d2,102——derivativeForm 4 ↗
Murphy NicoleSell FFebruary 6, 2026February 10, 20264d1,408$201$283KForm 4 ↗
Murphy NicoleOption / conversion MFebruary 6, 2026February 10, 20264d4,683——Form 4 ↗
Murphy NicoleSell FFebruary 6, 2026February 10, 20264d914$201$184KForm 4 ↗
Murphy NicoleOption / conversion MFebruary 6, 2026February 10, 20264d1,940——Form 4 ↗
Murphy NicoleSell FFebruary 6, 2026February 10, 20264d1,017$201$205KForm 4 ↗
Murphy NicoleOption / conversion MFebruary 6, 2026February 10, 20264d2,102——Form 4 ↗
Kramer RobinOption / conversion MFebruary 6, 2026February 10, 20264d3,511——derivativeForm 4 ↗
Kramer RobinOption / conversion MFebruary 6, 2026February 10, 20264d703——derivativeForm 4 ↗
Kramer RobinOption / conversion MFebruary 6, 2026February 10, 20264d789——derivativeForm 4 ↗
Kramer RobinSell FFebruary 6, 2026February 10, 20264d1,063$201$214KForm 4 ↗
Kramer RobinOption / conversion MFebruary 6, 2026February 10, 20264d3,511——Form 4 ↗
Kramer RobinSell FFebruary 6, 2026February 10, 20264d207$201$42KForm 4 ↗
Kramer RobinOption / conversion MFebruary 6, 2026February 10, 20264d703——Form 4 ↗
Kramer RobinSell FFebruary 6, 2026February 10, 20264d273$201$55KForm 4 ↗
Kramer RobinOption / conversion MFebruary 6, 2026February 10, 20264d789——Form 4 ↗
Keeney AdamOption / conversion MFebruary 6, 2026February 10, 20264d3,278——derivativeForm 4 ↗
Keeney AdamOption / conversion MFebruary 6, 2026February 10, 20264d1,802——derivativeForm 4 ↗
Keeney AdamSell FFebruary 6, 2026February 10, 20264d994$201$200KForm 4 ↗
Keeney AdamOption / conversion MFebruary 6, 2026February 10, 20264d3,278——Form 4 ↗
Keeney AdamSell FFebruary 6, 2026February 10, 20264d589$201$118KForm 4 ↗
Keeney AdamOption / conversion MFebruary 6, 2026February 10, 20264d1,802——Form 4 ↗
Izzar RachidOption / conversion MFebruary 6, 2026February 10, 20264d3,043——derivativeForm 4 ↗
Izzar RachidOption / conversion MFebruary 6, 2026February 10, 20264d1,802——derivativeForm 4 ↗
Izzar RachidOption / conversion MFebruary 6, 2026February 10, 20264d2,044——derivativeForm 4 ↗
Izzar RachidSell FFebruary 6, 2026February 10, 20264d775$201$156KForm 4 ↗
Izzar RachidOption / conversion MFebruary 6, 2026February 10, 20264d3,043——Form 4 ↗
Izzar RachidSell FFebruary 6, 2026February 10, 20264d458$201$92KForm 4 ↗
Izzar RachidOption / conversion MFebruary 6, 2026February 10, 20264d1,802——Form 4 ↗
Izzar RachidSell FFebruary 6, 2026February 10, 20264d805$201$162KForm 4 ↗
Izzar RachidOption / conversion MFebruary 6, 2026February 10, 20264d2,044——Form 4 ↗
Grogan JaneOption / conversion MFebruary 6, 2026February 10, 20264d1,873——derivativeForm 4 ↗
Grogan JaneOption / conversion MFebruary 6, 2026February 10, 20264d1,385——derivativeForm 4 ↗
Grogan JaneSell FFebruary 6, 2026February 10, 20264d584$201$117KForm 4 ↗
Grogan JaneOption / conversion MFebruary 6, 2026February 10, 20264d1,873——Form 4 ↗
Grogan JaneSell FFebruary 6, 2026February 10, 20264d407$201$82KForm 4 ↗
Grogan JaneOption / conversion MFebruary 6, 2026February 10, 20264d1,385——Form 4 ↗
Gregory GingerOption / conversion MFebruary 6, 2026February 10, 20264d3,746——derivativeForm 4 ↗
Gregory GingerOption / conversion MFebruary 6, 2026February 10, 20264d1,802——derivativeForm 4 ↗
Gregory GingerOption / conversion MFebruary 6, 2026February 10, 20264d1,635——derivativeForm 4 ↗
Gregory GingerSell FFebruary 6, 2026February 10, 20264d1,132$201$228KForm 4 ↗
Gregory GingerOption / conversion MFebruary 6, 2026February 10, 20264d3,746——Form 4 ↗
Gregory GingerSell FFebruary 6, 2026February 10, 20264d666$201$134KForm 4 ↗
Gregory GingerOption / conversion MFebruary 6, 2026February 10, 20264d1,802——Form 4 ↗
Gregory GingerSell FFebruary 6, 2026February 10, 20264d791$201$159KForm 4 ↗
Gregory GingerOption / conversion MFebruary 6, 2026February 10, 20264d1,635——Form 4 ↗
Godbout SeanOption / conversion MFebruary 6, 2026February 10, 20264d517——derivativeForm 4 ↗
Godbout SeanOption / conversion MFebruary 6, 2026February 10, 20264d305——derivativeForm 4 ↗
Godbout SeanOption / conversion MFebruary 6, 2026February 10, 20264d257——derivativeForm 4 ↗
Godbout SeanSell FFebruary 6, 2026February 10, 20264d180$201$36KForm 4 ↗
Godbout SeanOption / conversion MFebruary 6, 2026February 10, 20264d517——Form 4 ↗
Godbout SeanSell FFebruary 6, 2026February 10, 20264d103$201$21KForm 4 ↗
Godbout SeanOption / conversion MFebruary 6, 2026February 10, 20264d305——Form 4 ↗
Godbout SeanSell FFebruary 6, 2026February 10, 20264d76$201$15KForm 4 ↗
Godbout SeanOption / conversion MFebruary 6, 2026February 10, 20264d257——Form 4 ↗
ALEXANDER SUSAN HOption / conversion MFebruary 6, 2026February 10, 20264d4,916——derivativeForm 4 ↗
ALEXANDER SUSAN HOption / conversion MFebruary 6, 2026February 10, 20264d1,940——derivativeForm 4 ↗
ALEXANDER SUSAN HOption / conversion MFebruary 6, 2026February 10, 20264d2,190——derivativeForm 4 ↗
ALEXANDER SUSAN HSell FFebruary 6, 2026February 10, 20264d1,514$201$305KForm 4 ↗
ALEXANDER SUSAN HOption / conversion MFebruary 6, 2026February 10, 20264d4,916——Form 4 ↗
ALEXANDER SUSAN HSell FFebruary 6, 2026February 10, 20264d931$201$187KForm 4 ↗
ALEXANDER SUSAN HOption / conversion MFebruary 6, 2026February 10, 20264d1,940——Form 4 ↗
ALEXANDER SUSAN HSell FFebruary 6, 2026February 10, 20264d1,059$201$213KForm 4 ↗
ALEXANDER SUSAN HOption / conversion MFebruary 6, 2026February 10, 20264d2,190——Form 4 ↗
Singhal PriyaOption / conversion MJanuary 30, 2026February 3, 20264d1,829——10b5-1 planderivativeForm 4 ↗
Singhal PriyaSell SFebruary 2, 2026February 3, 20261d748$179$134K10b5-1 planForm 4 ↗
Singhal PriyaSell FJanuary 30, 2026February 3, 20264d582$180$105K10b5-1 planForm 4 ↗
Singhal PriyaOption / conversion MJanuary 30, 2026February 3, 20264d1,829——10b5-1 planForm 4 ↗
Viehbacher ChristopherOption / conversion MDecember 1, 2025December 3, 20252d7,040——derivativeForm 4 ↗
Viehbacher ChristopherSell FDecember 1, 2025December 3, 20252d3,404$178$605KForm 4 ↗
Viehbacher ChristopherOption / conversion MDecember 1, 2025December 3, 20252d7,040——Form 4 ↗
Grogan JaneOption / conversion MOctober 31, 2025November 4, 20254d695——derivativeForm 4 ↗
Grogan JaneSell FOctober 31, 2025November 4, 20254d337$154$52KForm 4 ↗
Grogan JaneOption / conversion MOctober 31, 2025November 4, 20254d695——Form 4 ↗
Godbout SeanOption / conversion MOctober 2, 2025October 6, 20254d26——derivativeForm 4 ↗
Godbout SeanSell FOctober 2, 2025October 6, 20254d8$155$1,242Form 4 ↗
Godbout SeanOption / conversion MOctober 2, 2025October 6, 20254d26——Form 4 ↗

Congressional trades

FilerSideTrade dateDisclosedLagSharesPriceValueFlagsSourceShare
Maria Elvira SalazarSellSeptember 24, 2026October 7, 202613d——$1,001–$15KHouse PTR ↗
Kevin HernSellAugust 18, 2026September 1, 202614d——$1,001–$15KHouse PTR ↗
Alan ArmstrongBuyMarch 27, 2026July 21, 2026116d——$1,001–$15KlateSenate PTR ↗
Maria Elvira SalazarSellJune 2, 2026July 7, 202635d——$15K–$50KHouse PTR ↗
Gilbert Ray Cisneros, Jr.BuyJune 5, 2026July 2, 202627d——$1,001–$15KHouse PTR ↗
Maria Elvira SalazarBuyMay 11, 2026June 8, 202628d——$50K–$100KHouse PTR ↗
Maria Elvira SalazarBuyMay 12, 2026June 8, 202627d——$1,001–$15KHouse PTR ↗
Maria Elvira SalazarBuyMay 11, 2026June 8, 202628d——$1,001–$15KHouse PTR ↗
Gilbert Ray Cisneros, Jr.BuyJanuary 30, 2026February 13, 202614d——$1,001–$15KHouse PTR ↗

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Guides for this page

Sources and method

Official sources behind this page
SourceFilingsRowsFirst filedNewest filedRead the originals
House Clerk, periodic transaction reports68February 13, 2026October 7, 2026House Clerk search
Senate eFD, periodic transaction reports11July 21, 2026July 21, 2026Senate eFD search
SEC EDGAR, Form 438127October 6, 2025October 5, 2026Form 4 list on EDGAR

Site built October 22, 2026. Every row in the tables above links to its own filing. To quote a figure, use the Cite button at the top of the page; see how to cite and reuse.

Insider rows are Form 4 filings for this issuer from SEC EDGAR; congressional rows are periodic transaction reports parsed from the House Clerk and the Senate eFD. Values use the reported price for Form 4 and the disclosed range for Congress. See methodology and corrections.

Not investment advice. Disclosures are shown as filed and may lag the trade or be amended. No recommendation is made or implied.