Biogen (BIIB)

Nasdaq Health Care Biotechnology S&P 500
$248.35
+4.42 (+1.81%)
Close of Nov 06, 2026 · end-of-day data
SMA 50SMA 2005Y/10Y use weekly candles (10/40-week averages)

Performance

price return
1W-2.1%
1M+13.7%
3M+19.9%
6M+28.4%
YTD+41.1%
1Y+61.9%
3Y+3.6%
5Y-6.9%

Key statistics

Full financials →
Market cap$36.7B
P/E (TTM)107.0
EPS (TTM, diluted)$2.32
P/S3.57
P/B1.94
EV / EBITDA12.8
Revenue (TTM)$10.30B
Revenue growth+2.3%
Net margin3.4%
ROE1.8%
Debt / equity0.39
FCF yield5.6%
Dividend yield—
Payout ratio—
Beta (1Y)0.33
Volatility (1Y)34.2%
52-week range$151.83 – $258.78
Avg volume (50D)1.16M

Revenue & net income — last 8 quarters

Statements →

Chart pattern: Ascending Channel (weekly)

Forming
BIIB Ascending Channel chart

Trigger $262.29 (+5.6% away). Details →

Oct 28, 6:07 AM ET

Biogen Q3 revenue rises 11% to $2.8 billion; GAAP loss on $284 million charge

Mixed earnings 2.02

Biogen reported third quarter 2026 total revenue of $2.8 billion, up 11% from a year earlier, with the first full quarter of Apellis products contributing. GAAP diluted EPS was $(0.14) versus $3.17 a year earlier, mainly due to transaction-related charges, and non-GAAP diluted EPS fell to $2.62 from $4.81 after a $284 million acquired IPR&D, upfront and milestone expense. The company also raised the low end of its full year 2026 non-GAAP diluted EPS guidance to $12.20 to $13.00 from $12.00 to $13.00.

  • Total revenue $2.8 billion, up 11% year over year; Growth Portfolio revenue $1.26 billion, up 49%
  • GAAP diluted EPS $(0.14) vs. $3.17 a year earlier; non-GAAP diluted EPS $2.62 vs. $4.81
  • $284 million acquired IPR&D, upfront and milestone expense, primarily related to the RayThera Inc. acquisition
  • Full year 2026 non-GAAP diluted EPS guidance low end raised to $12.20 from $12.00; range now $12.20 to $13.00
Read the filing on SEC.gov ↗
Jul 29, 6:10 AM ET

Biogen Q2 revenue rises 3% to $2.7 billion; full-year EPS guidance cut to $12-$13

Mixed guidance Written later 2.02

Biogen reported second-quarter 2026 total revenue of $2.7 billion, up 3% from a year earlier, but diluted EPS fell sharply as deal-related charges and the Apellis acquisition weighed on results. The company cut its full-year 2026 Non-GAAP diluted EPS guidance to $12.00 to $13.00, down from $14.25 to $15.25 in April, which lowers the outlook for shareholders.

  • Q2 2026 GAAP diluted EPS was $0.66, down from $4.33 a year earlier; Non-GAAP diluted EPS was $3.60, down from $5.47
  • Full-year 2026 Non-GAAP diluted EPS guidance is $12.00 to $13.00, versus $14.25 to $15.25 reported in April
  • Full-year total revenue is now expected to rise by a mid-single-digit percentage in 2026 compared with 2025
  • Q2 2026 acquired IPR&D, upfront and milestone expense was $164 million, versus $47 million a year earlier
Read the filing on SEC.gov ↗
Jul 1, 4:08 PM ET

Biogen expects $164 million Q2 2026 charge, a $0.95 per share hit to earnings

Negative earnings Written later 2.02

Biogen said its second-quarter 2026 GAAP and non-GAAP results will include about $164 million in pre-tax acquired in-process R&D, upfront and milestone expense, reducing diluted earnings per share by about $0.95. It also expects third-quarter charges of $290 million to $320 million, or $1.75 to $1.95 per diluted share, tied to potential milestones and transactions that have not yet closed. Shareholders face lower reported earnings in both quarters, and the second-quarter figures are preliminary.

  • Q2 2026 acquired IPR&D, upfront and milestone expense: about $164 million pre-tax, about $0.95 per diluted share
  • Q3 2026 expected expense: $290 million to $320 million, about $1.75 to $1.95 per diluted share
  • Q3 estimate relates to potential milestones and transactions that have not yet closed
  • Quarter ended June 30, 2026 results have not been finalized and may differ from these estimates
Read the filing on SEC.gov ↗
May 14, 8:31 AM ET

Biogen completes $41-per-share Apellis acquisition, funded by $2 billion term loan

Neutral m&a Written later 1.012.012.037.01

Biogen completed its acquisition of Apellis Pharmaceuticals on May 14, 2026, after about 82.4% of Apellis shares were tendered into its $41.00-per-share cash offer, plus one contingent value right per share worth up to $4.00 tied to SYFOVRE sales milestones. Biogen borrowed the full $2 billion under a new unsecured term loan on May 13, 2026, and used part of it to pay for the deal. Apellis's EMPAVELI and SYFOVRE products recorded $689 million in net product revenue in 2025, but the CVR payments depend on sales thresholds that may never be met.

  • Offer price: $41.00 per share in cash plus one CVR per share worth up to $4.00 in total
  • 105,687,831 Apellis shares validly tendered, about 82.4% of shares outstanding at expiration
  • $2 billion unsecured term loan: $1 billion due May 12, 2027 (Tranche A) and $1 billion due May 12, 2028 (Tranche B)
  • EMPAVELI and SYFOVRE recorded $689 million in combined net product revenue in 2025
Read the filing on SEC.gov ↗

Briefs are written by AI from the filing text (each brief's own page names the model) and can contain mistakes — open the filing before acting on anything. Impact (1-5) and tone are the model's reading of the filing for shareholders, not a price forecast. Not investment advice.

Recent SEC filings

EDGAR ↗

Famous investors who own BIIB

All investors →
InvestorValue% of portfolioLast quarter
Renaissance Technologies $16.80M0.02% Reduced

From each investor's latest 13F filing (Q2 2026); positions are as of the quarter end and filed up to 45 days later.

Trades disclosed by members of Congress

All BIIB congressional trades →
TradedMemberTypeAmount
Sep 24, 2026Maria Elvira Salazar FL-27Sell (partial)$1,001 – $15,000
Aug 18, 2026Kevin Hern OK-01Sell$1,001 – $15,000
Jun 02, 2026Maria Elvira Salazar FL-27Sell$15,001 – $50,000
Jun 05, 2026Gilbert Cisneros CA-31Buy$1,001 – $15,000
May 12, 2026Maria Elvira Salazar FL-27Buy$1,001 – $15,000
May 11, 2026Maria Elvira Salazar FL-27Buy$1,001 – $15,000
May 11, 2026Maria Elvira Salazar FL-27Buy$50,001 – $100,000
Jan 30, 2026Gilbert Cisneros CA-31Buy$1,001 – $15,000

From House periodic transaction reports (STOCK Act); amounts are the form's ranges.

Insider transactions

All insider trades →
DateInsiderTypeSharesPriceValue
Oct 30Grogan Jane
Head of Research
Tax Withholding345$253.62$87.50K
Oct 02Godbout Sean
Chief Accounting Officer
Tax Withholding8$219.88$1.76K

Prices are end-of-day and split-adjusted. Financial data from Biogen's SEC XBRL filings. Not investment advice.