BIIB · NASDAQ · Biotechnology
Biotechnology company based in Cambridge, Massachusetts.
Last close, Oct 1, 2026
$222.82
Adjusted for splits and dividends
Last 12 months
+44.5%
S&P 500 +14.3% over the same dates
Market value
$32.9B
Last close × shares outstanding
Bets against the stock: 5.82M shares sold short (3.9% of shares outstanding), +1.6% vs the previous count, 7.6 days of normal trading to buy them back. FINRA, as of Sep 15, 2026.
Insiders buying, last 90 days
None
No open-market purchases reported
Insiders selling, last 90 days
2 sales
$240K sold. Insiders sell for many reasons.
New federal contracts, 12 months
None
Nothing found for this company
Revenue, fiscal 2025
$9.89B
+2.2% vs the year before
Net income, fiscal 2025
$1.29B
As reported in the annual filing
Shares outstanding
148M
As of Apr 27, 2026
Congress tradeSits on House Ways and Means, Health3 different filers disclosed BIIB within 90 days. Disclosed 14 days after the transaction; reported as an official range, not an exact amount.
Stock since the trade +10.4% · S&P 500 +0.8% · to Oct 1Traded 5 days after resultsStock 58% above its 52-week low and 7% below its high
3,875 → 3,282 shares held−15% of their stake
A board member of Biogen sold $121K of Biogen shares. Nobody planned it ahead of time.
Stock since the trade +6.9% · S&P 500 -0.9% · to Oct 1Traded 6 days after resultsStock within 4% of its 52-week high
3,282 → 2,689 shares held−18% of their stake
A board member of Biogen sold $119K of Biogen shares. Nobody planned it ahead of time.
3 different filers disclosed BIIB within 90 days. Disclosed 116 days after the transaction; reported as an official range, not an exact amount.
4 different filers disclosed BIIB within 90 days. Disclosed 35 days after the transaction; reported as an official range, not an exact amount.
Prices are daily closes from Polygon.io. Company figures come from its own SEC filings. Past moves are not a forecast. OQRO reports what was filed and never tells you what to buy or sell.
Short sale volume: 59.0% of the volume reported to FINRA over the last 20 trading days was marked short, close to its 1-year average of 58.5%. FINRA daily files, to Oct 2, 2026.
Fails to deliver: 7,185 shares (about $1.59M) were not delivered on time for settlement on Sep 8, 2026. SEC fails-to-deliver data.
Short sale volume is not short interest. It counts trades marked short, including market makers selling short to fill buy orders, so it is a share of daily trading, not a count of bets against the stock. Fails to deliver have many causes, including processing delays, and are often resolved within days.
1 approval or clearance and 0 recalls recorded by the FDA for this company and its listed subsidiaries.
From openFDA: Drugs@FDA (new applications and new uses), device 510(k) and PMA decisions, and FDA enforcement reports. Class I recalls are the most serious, Class III the least. Most recalls are started by the company itself. Labeling and manufacturing changes are not listed.
Granting of Requests for Early Termination of the Waiting Period Under the Premerger Notification Rules
Notice · Federal Trade Commission
Advisory Committee; Peripheral and Central Nervous System Drugs Advisory Committee; Termination and Reestablishment
Notice · Food and Drug Administration
Federal rules, proposed rules and notices that name the company by its legal name, from the Federal Register. Being named is not the same as being the target of a rule.
FMR LLC
Schedule 13G: passive · filed Aug 6, 2026 · 18.3M shares
Vanguard Capital Management
Schedule 13G: passive · filed Apr 29, 2026 · 11M shares
STATE STREET CORPORATION
Schedule 13G: passive · filed Nov 10, 2025 · 7.32M shares
Anyone owning more than 5% must file within days. Structured filings exist since December 2024, so older stakes that were never amended may be missing.
28 certified in FY2026 Q3, vs 35 a year earlier. 28 positions in total, median offered wage $137K a year.
Labor condition applications for H-1B workers certified by the Department of Labor, counted by decision date (FY2026 Q3: Apr 1, 2026 to Jun 30, 2026, the latest quarter published). A certified application is a step before a visa petition, not a hire or a visa, and one application can cover several positions. Matched by employer ID number or name.
Last 12 months, adjusted daily closes
Adjusted close went from $154.22 on Oct 1, 2025 to $222.82 on Oct 1, 2026 (+44.5%). Disclosed trades in the last 12 months: 1 insider purchase, 4 insider sales, 6 Congress purchases, 2 Congress sales.
Congress trade