Biogen Inc.
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Range $157 – $300
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About the company
Biogen Inc. is a leading biotechnology firm dedicated to the discovery, development, production, and distribution of treatments for complex neurological and neurodegenerative conditions. Its established portfolio includes a range of medications addressing multiple sclerosis (MS), such as TECFIDERA, VUMERITY, AVONEX, PLEGRIDY, TYSABRI, and FAMPYRA.
- CEO
- Christopher A. Viehbacher
- IPO
- 1991
- Employees
- 7,500
- HQ
- Cambridge, MA, US
AI snapshot
Six angles, distilled from the data.
BIIB is in a constructive multi-month uptrend, trading above its 50-day and 200-day moving averages. The stock sits near the upper end of its 52-week range, which signals a mature recovery rather than an early breakout.
Street sentiment is positive, with a Buy consensus and a $238.69 median target versus a $209.83 last close. Recent action has leaned constructive: Wolfe upgraded the name to Outperform and several firms lifted targets into the $240-$300 range, even as a few ratings stayed neutral.
Biogen has a clean beat streak, with 8 straight EPS beats and the last four surprises ranging from 18.4% to 24.0%. Next-year EPS estimates are still stepping up sharply to $16.60, so shareholders should watch whether management can keep margin leverage and pipeline execution on track.
Recent insider activity leans to net selling, but the signal is muted by heavy award and exempt-transaction noise. The only clear discretionary sales were two small director sales by Lloyd Minor, while most other filings were awards or exempt exercises rather than open-market conviction trades.
Profitability is solid, with a 78.3% gross margin and a 25.1% operating margin, though net margin is a more modest 8.3%. Revenue grew 3.4% year over year, and free cash flow of $2.36 billion supports a 7.61% FCF yield.
BIIB screens as a profitable large-cap biotech with lower volatility than many peers, helped by a 0.162 beta and strong cash generation. The valuation is not stretched relative to the sector, with a 13.25 P/E and a target stack that still leaves room above the current share price.
Similar companies
Peers in the same neighborhood.
- Market Cap
- $32.13B
- P/E
- 38.29
- Fwd P/E
- 17.46
- PEG
- -0.83
- P/S
- 3.23
- P/B
- 1.70
- EV/EBITDA
- 23.46
- Div Yield
- 0.00%
- Gross Margin
- 67.71%
- Op Margin
- 12.79%
- Net Margin
- 8.39%
- ROE
- 4.52%
- ROIC
- 4.28%
Latest fiscal year · YoY change
- Revenue
- $9.81B+1.4%
- Gross Profit
- $6.91B-6.1%
- Op Income
- $1.88B
- Net Income
- $1.29B-20.8%
- EPS
- $8.85-21.0%
- OCF Growth
- -23.3%
- FCF Growth
- -18.5%
- 52W High
- $222.15
- 52W Low
- $131.52
- 50D MA
- $204.52
- 200D MA
- $187.36
- Beta
- 0.16
- RSI (14)
- 60
- Avg Volume
- 1.18M
Earnings call summaries
Pick a quarter — each call distilled into takeaways, results, and a bull vs bear read.
Biogen posted a stronger-than-expected second quarter, driven by growth products and new Apellis assets, and raised 2026 guidance to reflect a return to revenue growth.· July 29, 2026
- Core pharmaceutical revenue was $1.8 billion, up 4% year over year and 12% quarter over quarter; total revenue was $2.7 billion, up 3% year over year.
- Growth products generated over $1 billion in the quarter, up 24% year over year; Biogen standalone growth products were $933 million, up 9% year over year.
- SPINRAZA high-dose conversion is running faster than expected, and management said the U.S., Europe, and Japan launches are supporting demand and switchbacks from Evrysdi.
- LEQEMBI IQLIK was approved for home initiation/maintenance dosing, which management said could broaden access and help keep patients on therapy longer.
- SYFOVRE and Empaveli contributed $128 million post-close; management expects the combined products to grow in the mid- to high-teens through at least 2028.
- Biogen raised full-year 2026 guidance from a mid-single-digit revenue decline to a mid-single-digit revenue increase and now expects non-GAAP EPS of $12 to $13.
Biogen reported second-quarter core pharmaceutical revenue of $1.8 billion, up 4% year over year and 12% quarter over quarter. Total revenue was $2.7 billion, up 3% year over year. Growth portfolio revenue was over $1 billion, up 24% year over year and 25% quarter over quarter; standalone growth products were $933 million, up 9% year over year and 10% quarter over quarter. SPINRAZA revenue was $402 million, VUMERITY $197 million, LEQEMBI end-market revenue $184 million, SKYCLARYS $168 million, ZURZUVAE $71 million, TYSABRI $451 million, SYFOVRE $162 million, and Empaveli $46 million. Non-GAAP cost of sales was 22% of revenue versus 21% last year, free cash flow was $408 million, cash was $1.3 billion, and net debt was $6.8 billion. Management increased full-year 2026 revenue guidance from a mid-single-digit percentage decrease to a mid-single-digit percentage increase and updated non-GAAP diluted EPS guidance to $12 to $13. The company said core operating expenses in the second half of 2026 are expected to be between $2.65 billion and $2.7 billion, and it still expects about $0.85 of non-GAAP EPS dilution from the Apellis transaction in 2026, with accretion in 2027.
Christopher Viehbacher framed the quarter as evidence that Biogen is rebuilding into a broader growth company rather than a legacy MS story. He highlighted three pillars: an expanding growth portfolio, a late-stage pipeline with several registrational readouts over the next four quarters, and the Apellis acquisition adding immediate commercial assets. His tone was confident and strategic, emphasizing execution, portfolio breadth, and the potential for sustainable revenue growth over the next decade.
Robin Kramer emphasized strong commercial execution and a portfolio shift that is starting to show up in the numbers. She cited $1.8 billion of core pharma revenue, growth portfolio revenue above $1 billion, $128 million from SYFOVRE and Empaveli after the May 14 close, and $408 million of free cash flow. She also outlined transaction impacts, including about $120 million to $130 million of other income and expense in both 2026 and 2027, at least $250 million of run-rate synergies by the end of 2027, about $0.85 of 2026 EPS dilution from Apellis financing costs, and a plan to repay the remaining term loan by the end of 2027. Her guidance update pointed to stronger top-line expectations, with 2026 non-GAAP EPS now targeted at $12 to $13.
Analysts focused heavily on SPINRAZA high-dose adoption, the upcoming lupus data, the commercial trajectory of SYFOVRE, and LEQEMBI IQLIK access and demand. Management said SPINRAZA high-dose is exceeding the original launch pace, with most current conversions coming from the lower dose but with early switchbacks from Evrysdi and new starts from babies/new patients. On lupus, Priya said Biogen is not speculating on the size of the placebo-adjusted effect needed for success, but remains confident in the trial design and the drug’s differentiated mechanism; on LEQEMBI IQLIK, Alisha said scripts are already being written ahead of availability by the end of August, while Part D access and prior authorization dynamics remain important variables.
The call showed clear momentum in Biogen’s commercial portfolio, with growth products now exceeding the legacy MS business and several brands posting strong quarterly growth. Management also sounded optimistic about upcoming catalysts: five registrational readouts across SLE, CLE, AMR, and Dravet syndrome, plus a newer home-dosing option for LEQEMBI that could expand use.
Biogen still faces real execution and pipeline risk, especially around upcoming lupus, AMR, and Dravet readouts where management repeatedly said results are not yet known. The company also acknowledged BIIB091 is in a crowded BTK market and is being paused for further evaluation, while LEQEMBI access and SYFOVRE persistence remain dependent on payer dynamics, physician behavior, and continued commercial execution.
AI summary of the company's earnings call · Paraphrased · Not investment advice
- Free Float
- 99.1%
- Shares Outstanding
- 147.75M
- Float Shares
- 146.43M
of shares held by institutions
1,057 13F filers
Buy/sell ratio 0.00. Sells can include pre-scheduled 10b5-1 plan sales, not just discretionary selling.
Congressional trading
Senate and House stock disclosures for BIIB, newest first.
| Member | Type | Traded | |
|---|---|---|---|
| Maria Elvira SalazarHouse · FL27 | Sell | Jun 2, 26 | Filing → |
| Gilbert CisnerosHouse · CA31 | Buy | Jun 5, 26 | Filing → |
| Maria Elvira SalazarHouse · FL27 | Buy | May 11, 26 | Filing → |
| Maria Elvira SalazarHouse · FL27 | Buy | May 12, 26 | Filing → |
| Maria Elvira SalazarHouse · FL27 | Buy | May 11, 26 | Filing → |
| Gilbert CisnerosHouse · CA31 | Buy | Jan 30, 26 | Filing → |
| Ro KhannaHouse · CA17 | Buy | Aug 26, 25 | Filing → |
| Rob BresnahanHouse · PA08 | Buy | May 15, 25 | Filing → |
| Rob BresnahanHouse · PA08 | Sell | Apr 8, 25 | Filing → |
| Rob BresnahanHouse · PA08 | Buy | Feb 25, 25 | Filing → |
| Ro KhannaHouse · CA17 | Buy | Nov 15, 24 | Filing → |
| Ro KhannaHouse · CA17 | Sell | Sep 9, 24 | Filing → |
| Ro KhannaHouse · CA17 | Sell | Sep 9, 24 | Filing → |
| Ro KhannaHouse · CA17 | Sell | Mar 25, 24 | Filing → |
Source: public STOCK Act disclosures. Filed weeks after the trade — a lagging signal, not a real-time one.
Top institutional holders
Largest 13F positions, with quarter-over-quarter change.
| Holder | Shares | Δ Quarter |
|---|---|---|
| Fmr LLC | 18.22M | ▲ 5.41M |
| Vanguard Group Inc | 17.45M | ▲ 157.86K |
| Blackrock, Inc. | 15.99M | ▲ 11.13K |
| Primecap Management Co | 15.15M | ▲ 397.00K |
| Vanguard Capital Management LLC | 9.65M | ▲ 113.70K |
| State Street Corp | 7.34M | ▲ 176.41K |
| Geode Capital Management, LLC | 4.45M | ▲ 106.69K |
| Wellington Management Group Llp | 3.12M | ▲ 155.83K |
| Norges Bank | 2.58M | ▲ 2.58M |
| Morgan Stanley | 2.41M | ▲ 240.33K |
| Aqr Capital Management LLC | 1.94M | ▲ 13.30K |
| Jpmorgan Chase & Co | 1.82M | ▼ 192.87K |
Held by 1,832 ETFs
Biggest fund positions in BIIB by dollar value.
Recent insider transactions
Who's buying, who's selling, and how much.
| Date | Insider | Type | Shares |
|---|---|---|---|
| Aug 3, 26 | Parini Michael | other | 0 |
| Aug 3, 26 | Minor Lloyd | sell | 593 |
| Aug 4, 26 | Minor Lloyd | sell | 593 |
| Jun 9, 26 | HAWKINS WILLIAM A | other | 1,505 |
| Jun 9, 26 | SHERWIN STEPHEN A | other | 1,505 |
| Jun 9, 26 | Rowinsky Eric K | other | 1,505 |
| Jun 9, 26 | Mantas Jesus B | other | 1,505 |
| Jun 9, 26 | LANGER SUSAN | other | 1,505 |
| Jun 9, 26 | Patolawala Monish D | other | 1,505 |
| Jun 9, 26 | Pangalos Menelas N | other | 1,505 |
A “Sell” may be a pre-scheduled 10b5-1 plan sale rather than a discretionary decision — read insider selling with that in mind.
Our BIIB coverage
Recent articles, reports, and earnings notes.

Biogen (BIIB): Turnaround Gains Traction as Growth Mix Improves
Biogen’s business has stabilized, with growth products and LEQEMBI helping offset legacy MS pressure. The stock still looks reasonably priced for a selective Buy as cash flow and mix improve.

Biogen’s Alzheimer’s win should not have been an 8% down day
Biogen’s selloff looks backward-looking. A newly approved home-start LEQEMBI formulation and fresh real-world stability data make the Alzheimer’s story easier to scale, not harder to believe.

Biogen (BIIB): Turnaround Gains Traction as Growth Mix Improves
Biogen is no longer just a declining MS story. Q1 2026 showed rising EPS, stronger free cash flow, and growing newer products, but full-year revenue still faces pressure.
Want a deeper read on BIIB?
Generate a full analyst-grade report — bull/bear case, price targets, valuation depth, and a complete financial breakdown.
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Headlines from third-party outlets — TickerSpark isn't affiliated with these sources.
AI analysis · Last refreshed August 15, 2026 · Live quote · Not investment advice