BIIB

BIOGEN INC.

Nasdaq · Biological Products, (No Diagnostic Substances) · Inc. DE · CIK 0000875045
$200.05 +0.05% $29.5B
Insider Selling Cluster (2 insiders)High Impact Filing (7/10)22 New Institutional Positions28 Institutional Exits
Vol
Market Cap$29.5B
Cap SizeLarge Cap
Analyst ConsensusBuy (61%)
Inst. Holders50 funds
Inst. Value$15.2B
Inst. Activity22 buys / 28 sells
Insider Activity1B / 2S
Insider Net $-$665.1K
SEC Reports14
Press Releases10
Congressional1 trades
Exchange Nasdaq·Sector Biological Products, (No Diagnostic Substances)·Inc. DE·CIK 0000875045·Prev Close $199.96

Recent Activity

Jul 29, 2026 earnings_calendar
BIIB Q2 2026 Earnings After Market Close — 2026-07-29
EPS est: $4.40 | Rev est: $2.4B
Jun 13, 2026 SEC
Piper Sandler double upgrades BIIB to Overweight — PT $214 (+7%)
ANALYST-UPGRADE — Impact 4/10
Jun 9, 2026 Insider
Freire Maria C was granted 2,005 shares
Director
Jun 9, 2026 Insider
Pangalos Menelas N was granted 1,505 shares
Director
Jun 9, 2026 Insider
Minor Lloyd was granted 1,505 shares
Director
Jun 8, 2026 SEC
Needham upgrades BIIB to Buy — PT $255 (+30.5%)
ANALYST-UPGRADE — Impact 2/10
May 22, 2026 Event
TOFIDENCE
Supplemental Approval — TOCILIZUMAB — INJECTABLE — INTRAVENOUS
May 20, 2026 SEC
Wells Fargo double upgrades BIIB to Overweight — PT $250 (+31.2%)
ANALYST-UPGRADE — Impact 3/10

Price Targets

$220.13 +10.0% upside Buy
Current $200.05 Low $150.00 Median $217.50 High $300.00 30 analysts
$150.00 $300.00

Analyst Ratings

Buy61% buy · 44 analysts
9Strong Buy
18Buy
16Hold
1Sell
0Strong Sell
Recent Analyst Actions
DateFirmActionRating
Jun 8, 2026 Needham UPGRADE Hold → Buy
May 27, 2026 RBC Capital MAINTAIN Outperform → Outperform
May 15, 2026 Piper Sandler REITERATE Overweight → Overweight
May 1, 2026 Citigroup MAINTAIN Neutral → Neutral
Apr 30, 2026 Morgan Stanley MAINTAIN Equal-Weight → Equal-Weight

Earnings Estimates

PeriodEPS Est.RangeGrowth#
Current Q $2.03 $-21.10 — $4.26 -63% YoY 21
Next Q $3.91 ▼ -0.9% $3.20 — $4.66 -19% YoY 21
Current FY $13.26 ▼ -1.0% $-10.65 — $15.90 -13% YoY 23
Next FY $16.68 ▲ +0.7% $14.25 — $19.35 26% YoY 23

Top Institutional Holders

FundValueMove
BlackRock, Inc.$2.9B
FMR LLC$2.3BADD
VANGUARD CAPITAL MANAGEMENT LLC$1.7B
STATE STREET CORP$1.3B
VANGUARD PORTFOLIO MANAGEMENT LLC$1.2B

Recent Insider Trades

DateInsiderTypeValue
Jun 9, 2026Freire MariaA$0.00
Jun 9, 2026Pangalos MenelasA$0.00
Jun 9, 2026Minor LloydA$0.00
Jun 9, 2026Pangalos MenelasM$0.00
Jun 9, 2026Patolawala MonishA$0.00

Congressional Trades

1 members: 1 buys, 0 sells
MemberPartyTypeAmount
Gilbert CisnerosDBUY$1,001 - $15,000
50 institutional holders with $15.2B total value (83,176,794 shares) as of 2026-Q1. Top holders: BlackRock,, FMR, VANGUARD. Net selling activity: 28 institutions trimmed/exited vs 22 added.

Top Institutional Holders — 2026-Q1

#FundSharesValue% of TrackedLast Move
1BlackRock, Inc.15,974,601$2.9B19.2%
2FMR LLC12,807,541$2.3B15.4%ADD +35.9%
3VANGUARD CAPITAL MANAGEMENT LLC9,537,417$1.7B11.5%
4STATE STREET CORP7,167,922$1.3B8.6%
5VANGUARD PORTFOLIO MANAGEMENT LLC6,531,727$1.2B7.9%
6WELLINGTON MANAGEMENT GROUP LLP2,961,641$543.0M3.6%
7MORGAN STANLEY2,170,940$398.0M2.6%
8Invesco Ltd.1,745,255$320.0M2.1%
9Legal & General Group Plc1,349,832$247.5M1.6%
10BANK OF AMERICA CORP /DE/1,156,369$212.0M1.4%
11CHARLES SCHWAB INVESTMENT MANAGEMENT INC1,149,394$210.7M1.4%
12DIMENSIONAL FUND ADVISORS LP1,079,119$197.9M1.3%
13DEUTSCHE BANK AG\1,063,828$195.0M1.3%
14GOLDMAN SACHS GROUP INC1,051,094$192.7M1.3%
15Pictet Asset Management Holding SA913,328$168.3M1.1%
16VANGUARD FIDUCIARY TRUST CO825,531$151.3M1.0%
17Point72 Asset Management, L.P.809,617$148.4M1.0%TRIM -71.2%
18Alyeska Investment Group, L.P.805,050$147.6M1.0%
19SUSQUEHANNA INTERNATIONAL GROUP, LLP798,700$146.4M1.0%
20Amundi790,827$145.0M1.0%ADD +38.2%

Recent Position Changes

FundActionPrev SharesCurr SharesChange %ValueQuarter
FMR LLCADD9,425,86312,807,541+35.9%$2.3B2026-Q1
Point72 Asset Management, L.P.TRIM2,813,192809,617-71.2%$148.4M2026-Q1
AmundiADD572,429790,827+38.2%$145.0M2026-Q1
AustralianSuper Pty LtdADD476,812616,193+29.2%$113.0M2026-Q1
Artemis Investment Management LLPDOUBLED226,845571,571+152.0%$104.8M2026-Q1
VICTORY CAPITAL MANAGEMENT INCADD246,650320,785+30.1%$58.8M2026-Q1
Swedbank ABADD231,609289,840+25.1%$53.1M2026-Q1
CAUSEWAY CAPITAL MANAGEMENT LLCTRIM521,101280,783-46.1%$51.5M2026-Q1
MARSHALL WACE, LLPTRIM385,928229,879-40.4%$42.1M2026-Q1
RENAISSANCE TECHNOLOGIES LLCTRIM399,196203,396-49.0%$37.3M2026-Q1
Allianz Asset Management GmbHTRIM247,722178,049-28.1%$32.6M2026-Q1
PRUDENTIAL FINANCIAL INCTRIM353,493163,887-53.6%$30.0M2026-Q1
ExodusPoint Capital Management, LPNEW151,993$27.9M2026-Q1
PANAGORA ASSET MANAGEMENT INCDOUBLED3,203142,065+4335.4%$26.0M2026-Q1
O'SHAUGHNESSY ASSET MANAGEMENT, LLCADD110,268141,324+28.2%$25.9M2026-Q1
LMR Partners LLPDOUBLED8,630116,131+1245.7%$21.3M2026-Q1
FEDERATED HERMES, INC.TRIM131,16897,279-25.8%$17.8M2026-Q1
Korea Investment CORPADD53,90773,988+37.3%$13.6M2026-Q1
Mariner, LLCADD52,47572,036+37.3%$13.2M2026-Q1
Universal- Beteiligungs- und Servicegesellschaft mbHTRIM123,73668,243-44.8%$12.6M2026-Q1
HighTower Advisors, LLCDOUBLED11,95949,851+316.8%$9.1M2026-Q1
BANCO BILBAO VIZCAYA ARGENTARIA, S.A.TRIM146,95142,471-71.1%$7.8M2026-Q1
FJARDE AP-FONDEN /FOURTH SWEDISH NATIONAL PENSION FUNDADD26,55339,303+48.0%$7.2M2026-Q1
State of Tennessee, Department of TreasuryTRIM71,46739,265-45.1%$7.2M2026-Q1
WEALTH ENHANCEMENT ADVISORY SERVICES, LLCADD37,94862,530+64.8%$6.7M2026-Q1
19 unique insiders with 49 transactions. Net insider value: -$665.1K ($585.11 bought, $665.7K sold).

Insider Transactions

DateInsiderTitleTypeSharesPriceValue
Jun 9, 2026Freire Maria CDirectorAWARD2,005
Jun 9, 2026Pangalos Menelas NDirectorAWARD1,505
Jun 9, 2026Minor LloydDirectorAWARD1,505
Jun 9, 2026Pangalos Menelas NDirectorEXERCISE2,370
Jun 9, 2026Patolawala Monish DDirectorAWARD1,505
Jun 9, 2026LANGER SUSANDirectorAWARD1,505
Jun 9, 2026Mantas Jesus BDirectorAWARD1,505
Jun 9, 2026Rowinsky Eric KDirectorAWARD1,505
Jun 9, 2026SHERWIN STEPHEN ADirectorAWARD1,505
Jun 9, 2026HAWKINS WILLIAM ADirectorAWARD1,505
May 1, 2026Keeney AdamHead of Corporate DevelopmentTAX W/H455$187.06$85.1K
May 1, 2026Keeney AdamHead of Corporate DevelopmentEXERCISE939
Apr 1, 2026Godbout SeanChief Accounting OfficerEXERCISE181
Apr 1, 2026Godbout SeanChief Accounting OfficerTAX W/H54$183.78$9.9K
Feb 13, 2026Viehbacher ChristopherPresident and CEOAWARD38,015
Feb 13, 2026Singhal PriyaHead of DevelopmentAWARD10,560
Feb 13, 2026Murphy NicoleHead of Pharm Ops and TechAWARD10,560
Feb 13, 2026Kramer RobinChief Financial OfficerAWARD8,450
Feb 13, 2026Keeney AdamHead of Corporate DevelopmentAWARD8,025
Feb 13, 2026Izzar RachidHead of Global Product Strat.AWARD7,390
Feb 13, 2026Grogan JaneHead of ResearchAWARD8,450
Feb 13, 2026Gregory GingerEVP, Human ResourcesAWARD8,025
Feb 13, 2026Godbout SeanChief Accounting OfficerAWARD1,800
Feb 13, 2026ALEXANDER SUSAN HEVP Chief Legal OfficerAWARD8,450
Feb 12, 2026Murphy NicoleHead of Pharm Ops and TechBUY3$195.04$585.11
Feb 9, 2026Singhal PriyaHead of DevelopmentSELL2,660$199.83$531.5K
Feb 6, 2026Murphy NicoleHead of Pharm Ops and TechTAX W/H1,017$201.18$204.6K
Feb 6, 2026Murphy NicoleHead of Pharm Ops and TechEXERCISE2,102
Feb 6, 2026Singhal PriyaHead of DevelopmentTAX W/H1,056$201.18$212.4K
Feb 6, 2026Singhal PriyaHead of DevelopmentEXERCISE2,217
Feb 6, 2026Viehbacher ChristopherPresident and CEOEXERCISE9,008
Feb 6, 2026Viehbacher ChristopherPresident and CEOTAX W/H4,356$201.18$876.3K
Feb 6, 2026ALEXANDER SUSAN HEVP Chief Legal OfficerTAX W/H1,059$201.18$213.0K
Feb 6, 2026ALEXANDER SUSAN HEVP Chief Legal OfficerEXERCISE2,190
Feb 6, 2026Godbout SeanChief Accounting OfficerTAX W/H76$201.18$15.3K
Feb 6, 2026Godbout SeanChief Accounting OfficerEXERCISE257
Feb 6, 2026Gregory GingerEVP, Human ResourcesTAX W/H791$201.18$159.1K
Feb 6, 2026Gregory GingerEVP, Human ResourcesEXERCISE1,635
Feb 6, 2026Izzar RachidHead of Global Product Strat.TAX W/H805$201.18$161.9K
Feb 6, 2026Izzar RachidHead of Global Product Strat.EXERCISE2,044
Feb 6, 2026Grogan JaneHead of ResearchTAX W/H407$201.18$81.9K
Feb 6, 2026Grogan JaneHead of ResearchEXERCISE1,385
Feb 6, 2026Keeney AdamHead of Corporate DevelopmentTAX W/H589$201.18$118.5K
Feb 6, 2026Keeney AdamHead of Corporate DevelopmentEXERCISE1,802
Feb 6, 2026Kramer RobinChief Financial OfficerTAX W/H273$201.18$54.9K
Feb 6, 2026Kramer RobinChief Financial OfficerEXERCISE789
Feb 2, 2026Singhal PriyaHead of DevelopmentSELL748$179.30$134.1K
Jan 30, 2026Singhal PriyaHead of DevelopmentEXERCISE1,829
Jan 30, 2026Singhal PriyaHead of DevelopmentTAX W/H582$179.89$104.7K
14 SEC filing reports analyzed. Sentiment: 7 bullish, 0 bearish, 3 mixed, 4 neutral. Avg impact: 3.4/10.
MIXED ANALYST-UPGRADE 3/10
Wells Fargo double upgrades BIIB to Overweight — PT $250 (+31.2%)
May 20, 2026
BULLISH ANALYST-UPGRADE 4/10
Piper Sandler double upgrades BIIB to Overweight — PT $214 (+7%)
Jun 13, 2026
BULLISH ANALYST-UPGRADE 2/10
Needham upgrades BIIB to Buy — PT $255 (+30.5%)
Jun 8, 2026
BULLISH ANALYST-UPGRADE 4/10
Wells Fargo double upgrades to Overweight with $250 PT — +41% upside
Apr 20, 2026
MIXED ANALYST-UPGRADE 3/10
UBS double upgrades NVDA to Buy — PT $225 (+21%)
Apr 22, 2026
BULLISH ANALYST-UPGRADE 3/10
13 firms acted on BIIB: Barclays, HSBC, Freedom Broker, Stifel, Jefferies, Argus Research, Piper Sandler, BMO Capital, Jefferies, Needham, Wolfe Research, Citigroup, Morgan Stanley
May 31, 2026
MIXED ANALYST-UPGRADE 5/10
Stifel upgrades BIIB to Buy from Hold — PT $202 (+7% implied upside, up from $144)
May 1, 2026
BULLISH ANALYST-UPGRADE 3/10
UBS upgrades BIIB to Buy — PT $225 (+18.8%)
May 22, 2026
BULLISH ANALYST-UPGRADE 3/10
Piper Sandler double upgrades NVDA to Overweight — PT $214 (+5%)
May 14, 2026
BULLISH 8-K 7/10
Biogen completed its $5.3B acquisition of Apellis Pharmaceuticals on May 14, 2026, adding commercial
May 14, 2026
NEUTRAL DEFA14A 2/10
Biogen filed a DEFA14A (additional definitive proxy soliciting materials) providing notice of its 20
Apr 28, 2026
NEUTRAL 8-K 3/10
Biogen issued a preliminary earnings update for Q1 2026, expecting a $34 million charge for acquired
Apr 21, 2026
NEUTRAL COURT-RULING 3/10
Analysis based on filing metadata only — document content was unavailable
Mar 30, 2026
NEUTRAL 8-K 3/10
Analysis based on filing metadata only — document content was unavailable. The filing is an 8-K with
Mar 11, 2026
Current analyst consensus: Buy (61% buy). Based on 44 analysts: 9 strong buy, 18 buy, 16 hold, 1 sell, 0 strong sell.

Analyst Price Targets

$220.13 mean target +10.0% upside Buy (1.97)
$150.00 Low $300.00 High
MetricValue
Current Price$200.05
Target Low$150.00
Target Mean$220.13
Target Median$217.50
Target High$300.00
# Analysts30
RecommendationBuy (1.97)

Earnings Estimates & Revisions

PeriodEPS AvgEPS LowEPS HighEPS Growth30d Rev.Up/DownRev. AvgRev. GrowthAnalysts
Current Q
2026-06-30
$2.03 $-21.10 $4.26 -62.9% +0.4% 0↑ 9↓ $2.4B -8.4% 21
Next Q
2026-09-30
$3.91 $3.20 $4.66 -18.7% -0.9% 2↑ 6↓ $2.6B 1.3% 21
Current FY
2026-12-31
$13.26 $-10.65 $15.90 -13.2% -1.0% 0↑ 10↓ $10.0B 1.6% 23
Next FY
2027-12-31
$16.68 $14.25 $19.35 25.8% +0.7% 8↑ 1↓ $10.4B 3.4% 23

Current Quarter EPS Revision History

TimepointEPS EstimateChange
Current$2.031
7d ago$1.940+0.091
30d ago$2.022+0.008
60d ago$4.407-2.377
90d ago$4.321-2.291
19 analyst firms have rated this stock: 4 upgrades, 0 downgrades, 1 initiations.

Individual Analyst Actions

DateAnalyst FirmActionPrevious RatingNew Rating
Jun 8, 2026 Needham UPGRADE Hold Buy
May 27, 2026 RBC Capital MAINTAIN Outperform Outperform
May 15, 2026 Piper Sandler REITERATE Overweight Overweight
May 1, 2026 Citigroup MAINTAIN Neutral Neutral
Apr 30, 2026 Morgan Stanley MAINTAIN Equal-Weight Equal-Weight
Apr 30, 2026 RBC Capital MAINTAIN Outperform Outperform
Apr 30, 2026 Guggenheim MAINTAIN Buy Buy
Apr 30, 2026 Wedbush MAINTAIN Neutral Neutral
Apr 22, 2026 UBS UPGRADE Neutral Buy
Apr 20, 2026 Wells Fargo UPGRADE Equal-Weight Overweight
Apr 14, 2026 Piper Sandler UPGRADE Neutral Overweight
Apr 13, 2026 Citigroup MAINTAIN Neutral Neutral
Apr 13, 2026 Truist Securities MAINTAIN Hold Hold
Apr 10, 2026 Morgan Stanley MAINTAIN Equal-Weight Equal-Weight
Apr 2, 2026 HC Wainwright & Co. MAINTAIN Buy Buy
Apr 1, 2026 Canaccord Genuity MAINTAIN Buy Buy
Apr 1, 2026 Oppenheimer MAINTAIN Outperform Outperform
Mar 17, 2026 HSBC MAINTAIN Reduce Reduce
Feb 23, 2026 Freedom Broker MAINTAIN Hold Hold
Feb 20, 2026 Barclays INITIATE Equal-Weight
Feb 10, 2026 Wedbush MAINTAIN Neutral Neutral
Feb 9, 2026 JP Morgan MAINTAIN Neutral Neutral
Feb 9, 2026 Canaccord Genuity MAINTAIN Buy Buy
Feb 9, 2026 BMO Capital MAINTAIN Market Perform Market Perform
Feb 9, 2026 TD Cowen MAINTAIN Buy Buy
Feb 9, 2026 Citigroup MAINTAIN Neutral Neutral
Feb 9, 2026 RBC Capital MAINTAIN Outperform Outperform
Feb 9, 2026 Guggenheim MAINTAIN Buy Buy
Feb 9, 2026 Wells Fargo MAINTAIN Equal-Weight Equal-Weight
Feb 9, 2026 Truist Securities MAINTAIN Hold Hold
Feb 9, 2026 Wedbush MAINTAIN Neutral Neutral
Feb 9, 2026 HC Wainwright & Co. MAINTAIN Buy Buy
Feb 9, 2026 Piper Sandler MAINTAIN Neutral Neutral
Jan 30, 2026 Oppenheimer MAINTAIN Outperform Outperform
Jan 27, 2026 Citigroup MAINTAIN Neutral Neutral
Jan 8, 2026 Truist Securities MAINTAIN Hold Hold
Jan 7, 2026 Citigroup MAINTAIN Neutral Neutral

Monthly Consensus History

PeriodStrong BuyBuyHoldSellStrong SellBuy %Distribution
Jun 1, 2026918161061%
May 1, 2026915181056%
Apr 1, 2026911221047%
Mar 1, 2026911221047%
Feb 1, 2026911211048%
Jan 1, 2026911211048%
Dec 1, 2025912210050%
Nov 1, 2025813210050%
Strong BuyBuyHoldSellStrong Sell
1 members of Congress traded this stock: 1 buys, 0 sells.

Congressional Trades

DateMemberPartyChamberTypeAmountAssetDisclosed
Jan 30, 2026Gilbert CisnerosDHOUSEBUY$1,001 - $15,000Biogen IncFeb 16, 2026 (18d)

No Reddit sentiment data available yet. Sentiment is analyzed from Reddit investment communities on a rolling basis.

Jul 29, 2026
earnings_calendar
BIIB Q2 2026 Earnings After Market Close — 2026-07-29
EPS est: $4.40 | Rev est: $2.4B
Jun 4, 2026
other
Biogen’s Salanersen Receives FDA Breakthrough Therapy Designation for Spinal Muscular Atrophy
<p>CAMBRIDGE, Mass., June 04, 2026 (GLOBE NEWSWIRE) -- <strong> </strong> <a href="https://www.globenewswire.com/Tracker?data=hPxI_mCodj0_aUCNuVm35c
Jun 4, 2026
fda
EULAR 2026: Dapirolizumab Pegol Shows Potential to Reduce Flare Rates and Maintain Disease Control in Systemic Lupus Erythematosus
<p>BRUSSELS, Belgium and CAMBRIDGE, Mass., June 04, 2026 (GLOBE NEWSWIRE) -- <a href="https://www.globenewswire.com/Tracker?data=c5d6616oC1bYwKRGubo
Jun 3, 2026
other
Biogen Announces Upcoming Kidney Presentations at European Renal Association and American Transplant Congresses
<p>CAMBRIDGE, Mass., June 03, 2026 (GLOBE NEWSWIRE) -- <a href="https://www.globenewswire.com/Tracker?data=6vkOQ5eV6ztnTE8P3MutS58MQVNu8VOgRO1a2AZE8
Jun 1, 2026
contract
UCB and Biogen Announce Publication in The Lancet of Positive Dapirolizumab Pegol (DZP) Phase 3 Study Results in Systemic Lupus Erythematosus
<p>BRUSSELS, Belgium and CAMBRIDGE, Mass., June 01, 2026 (GLOBE NEWSWIRE) -- <a href="https://www.globenewswire.com/Tracker?data=P5fkXjrpMQ61BSApsTM
May 29, 2026
Clinical Trial
A Study to Learn About the Safety of BIIB122 Tablets and Whether They Can Slow the Worsening of Early-Stage Parkinson's Disease in Adults Between the Ages of 30 and 80
Phase Phase 2 — COMPLETED
May 29, 2026
clinical_trial_readout
Results Pending: BIIB122 (Phase 2) — Completed 81d ago
Trial: A Study to Learn About the Safety of BIIB122 Tablets and Whether They Can Slow the Worsening of Early-Stage Parkinson's Disease in Adults Betwe
May 25, 2026
dark_pool
Dark Pool: BIIB — 0.9M shares, 31,974 trades
Week starting 2026-05-25. Total ATS volume: 942,726 shares across 31,974 trades.
May 24, 2026
fda_pdufa
PDUFA: BIIB — LEQEMBI in IQLIK subcutaneous treatment — 2026-05-24
FDA target action date 2026-05-24 for BIIB (BIOGEN INC.). Drug: LEQEMBI. Indication: IQLIK subcutaneous treatment. FDA Priority Review granted for LEQ
May 22, 2026
FDA
TOFIDENCE
Supplemental Approval — TOCILIZUMAB — INJECTABLE — INTRAVENOUS
May 21, 2026
contract
Biogen and Denali Therapeutics Provide Update on Phase 2b LUMA Study of BIIB122 (DNL151) in Early-Stage Parkinson’s Disease
<p>CAMBRIDGE, Mass. and SOUTH SAN FRANCISCO, Calif., May 21, 2026 (GLOBE NEWSWIRE) -- <a href="https://www.globenewswire.com/Tracker?data=aRNdAkEZs
May 20, 2026
Clinical Trial
Phase 3 Efficacy and Safety Study of BG00012 in Pediatric Participants With Relapsing-Remitting Multiple Sclerosis (RRMS)
Phase Phase 3 — COMPLETED
May 18, 2026
dark_pool
Dark Pool: BIIB — 1.5M shares, 42,814 trades
Week starting 2026-05-18. Total ATS volume: 1,461,646 shares across 42,814 trades.
May 14, 2026
m_and_a
Biogen Completes Acquisition of Apellis Pharmaceuticals
<p align="justify">CAMBRIDGE, Mass., May 14, 2026 (GLOBE NEWSWIRE) -- <a href="https://www.globenewswire.com/Tracker?data=W-OIuvVUjGbgwnZXAl5pS5rNIq
May 14, 2026
fda
Topline Results from Phase 2 CELIA Study of Diranersen (BIIB080): First Study to Show Reduction in Tau Pathology and Cognitive Benefit in Patients with Early Alzheimer’s Disease
CELIA did not meet its primary endpoint assessing dose response; based on the strength of the biomarker and efficacy data, Biogen plans to advance dir
May 14, 2026
short_volume
Short Volume: BIIB — 66.8% short (0.8M / 1.2M)
Short: 822,048 | Exempt: 1,075 | TRF Vol: 1,230,815 | Short Ratio: 66.8% | Off-exchange volume (dark pool + OTC)
May 13, 2026
short_volume
Short Volume: BIIB — 65.8% short (0.4M / 0.6M)
Short: 366,010 | Exempt: 0 | TRF Vol: 555,948 | Short Ratio: 65.8% | Off-exchange volume (dark pool + OTC)
May 11, 2026
dark_pool
Dark Pool: BIIB — 2.6M shares, 52,812 trades
Week starting 2026-05-11. Total ATS volume: 2,575,000 shares across 52,812 trades.
May 4, 2026
Clinical Trial
A Study to Learn About the Long-Term Safety of Higher Doses of Nusinersen (BIIB058) Given as Injections to Participants With Spinal Muscular Atrophy (SMA) Who Took Part in an Earlier Nusinersen Trial (ONWARD)
Phase Phase 3 — ACTIVE_NOT_RECRUITING
May 1, 2026
Clinical Trial
A Study to Learn About the Safety of BIIB091 and Its Effect on Brain Inflammation When Taken Alone or With Diroximel Fumarate (DRF) in Adults With Relapsing Forms of Multiple Sclerosis (MS)
Phase Phase 2 — COMPLETED
Apr 29, 2026
Clinical Trial
Clinical Trial to Assess Efficacy and Safety of the Human Anti-CD38 Antibody Felzartamab (MOR202) in IgA Nephropathy
Phase Phase 2 — COMPLETED
Mar 30, 2026
Enforcement
1:25-cv-11680 Walgreen Co. et al v. Biogen, Inc.
Court ruling from United States District Court for the Northern District of Illinois. Docket: N/A
Dec 20, 2024
FDA
SKYCLARYS
Supplemental Approval — Efficacy — OMAVELOXOLONE — CAPSULE — ORAL
Jul 31, 2024
FDA
ZURZUVAE
Supplemental Approval — Labeling — ZURANOLONE — CAPSULE — ORAL