Biogen Inc.
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Range $175 – $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.
The stock is in a strong multi-month uptrend and still trades above its 200-day moving average, keeping the long-term regime constructive. It sits near the top of its 52-week range, which signals momentum has already been recognized and leaves less room for error if the trend cools.
Wall Street leans positive, with a Buy consensus and an average target of $245.88 versus a $300 high and $175 low. Recent action has been mixed but constructive: several firms lifted targets in late August and September, while ratings mostly stayed intact rather than turning more cautious.
Biogen has a clean recent beat streak, with 7 straight quarters of EPS beats and the last four surprises ranging from 18.4% to 24.0%. Next quarter is expected at $2.10 EPS, so shareholders should watch whether the company can extend that pattern while sustaining the higher forward earnings profile.
The pattern is net selling, but most of the recent activity is award, vesting, or tax-related noise rather than clear discretionary conviction. The only notable open-market signal in the table is director Lloyd Minor’s two sales in early August; recent officer entries are mostly grants and exempt transactions.
Profitability is solid, led by a 78.3% gross margin and a 25.1% operating margin, while revenue grew 3.4% year over year. Free cash flow was $2.36 billion with a 7.14% FCF yield, but the balance sheet still carries $6.95 billion of debt against $3.82 billion of cash.
Biogen screens as a profitable large-cap biotech with better cash generation than many peers, but it is not priced like a distressed name. At 14.12x earnings, the setup favors a premium-to-cash-flow story rather than a deep-value multiple.
Similar companies
Peers in the same neighborhood.
- Market Cap
- $33.04B
- P/E
- 39.36
- Fwd P/E
- 18.01
- PEG
- -0.86
- P/S
- 3.32
- P/B
- 1.75
- EV/EBITDA
- 24.00
- 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
- $230.49
- 52W Low
- $138.00
- 50D MA
- $215.72
- 200D MA
- $195.45
- Beta
- 0.17
- RSI (14)
- 54
- Avg Volume
- 1.08M
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
1,101 13F filers
Buy/sell ratio 0.50. 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 | |
|---|---|---|---|
| Kevin HernHouse · OK01 | Sell | Aug 18, 26 | Filing → |
| Alan ArmstrongSenate | Buy | Mar 27, 26 | Filing → |
| Maria Elvira SalazarHouse · FL27 | Sell | Jun 2, 26 | Filing → |
| Gilbert Ray 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 Ray CisnerosHouse · CA31 | Buy | Jan 30, 26 | Filing → |
| Ro KhannaHouse · CA17 | Buy | Aug 26, 25 | Filing → |
| Robert P. BresnahanHouse · PA08 | Buy | May 15, 25 | Filing → |
| Robert P. BresnahanHouse · PA08 | Sell | Apr 8, 25 | Filing → |
| Robert P. BresnahanHouse · PA08 | Buy | Feb 25, 25 | Filing → |
| Ro KhannaHouse · CA17 | Buy | Nov 15, 24 | Filing → |
| Ro KhannaHouse · CA17 | Sell | Sep 9, 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 |
| Vanguard Portfolio Management LLC | 6.60M | ▲ 73.21K |
| 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 |
Held by 1,984 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 |
|---|---|---|---|
| Oct 2, 26 | Godbout Sean | other | 27 |
| Oct 2, 26 | Godbout Sean | other | 8 |
| Oct 1, 26 | Godbout Sean | other | 985 |
| Oct 2, 26 | Godbout Sean | other | 27 |
| Sep 1, 26 | Parini Michael | other | 7,405 |
| 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 |
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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gurufocus.com · Oct 5
Biogen's experimental lupus drug shows benefit against skin symptoms
reuters.com · Oct 2
Biogen's Litifilimab Demonstrates Rapid and Durable Efficacy in New 52-Week Phase 2 Data from Ongoing Phase 2/3 AMETHYST Study, Reinforcing Its Potential as a First-in-Class Therapy for Cutaneous Lupus Erythematosus
globenewswire.com · Oct 2
Biogen (NASDAQ:BIIB) Reaches New 12-Month High – Still a Buy?
defenseworld.net · Sep 30
Can Biogen's Growth Portfolio Maintain Its Lead Over Legacy MS Drugs?
zacks.com · Sep 28
4 Alzheimer's Drug Stocks to Watch on World Alzheimer's Day
zacks.com · Sep 21
Mesoblast (NASDAQ:MESO) and Biogen (NASDAQ:BIIB) Head-To-Head Contrast
defenseworld.net · Sep 18
Phase 3 Pediatric EMPAVELI Data Published in Clinical Journal of the American Society of Nephrology Show Reduction in Proteinuria and Stabilized Kidney Function in Adolescents with C3G or Primary IC-MPGN
globenewswire.com · Sep 17
Headlines from third-party outlets — TickerSpark isn't affiliated with these sources.
AI analysis · Last refreshed October 6, 2026 · Live quote · Not investment advice