Biogen Inc Congressional Trading
According to U.S. congressional financial disclosures filed under the STOCK Act, members of Congress have reported 152 trades in Biogen Inc (NASDAQ: BIIB) since 2013, across 26 members, worth an estimated $2.4M in disclosed volume (the midpoint of the dollar ranges members report, not exact amounts). 78 buys against 74 sells, a modestly buy-led skew, with Democratic members responsible for 70% of the trades and Republican members 30%. The most recent disclosure shown was filed June 2026, and Maria Elvira Salazar has filed the most BIIB transactions among those shown, with 3. Other recent filers include Ro Khanna and Gilbert Cisneros. One notable disclosed move was a purchase by Ro Khanna on August 26, 2025, up 46.3% since. These figures are drawn from public House and Senate periodic transaction reports and reflect what members were required to disclose, not the current market value of any position. For the full record, including the month-by-month buy and sell timeline, the party breakdown, top buyers and sellers, and every individual filing, see the Biogen Inc (BIIB) stock overview and the complete trade table below.
Data updated
Price & congressional trade timeline
Party breakdown
Biogen congressional trading activity
| Politician | Published | Traded | Filed After | Type | Size | Return | |
|---|---|---|---|---|---|---|---|
 Maria Elvira Salazar House | Jun 8, 2026 | May 12, 2026 | 27 days | BUY |  $1,001 - $15,000 | +0.35% | |
Maria Elvira Salazar House | Jun 8, 2026 | May 11, 2026 | 28 days | BUY | $50,001 - $100,000 | +1.06% | |
Maria Elvira Salazar House | Jun 8, 2026 | May 11, 2026 | 28 days | BUY | $1,001 - $15,000 | +1.06% | |
 Ro Khanna House | Mar 9, 2026 | Feb 6, 2026 | 31 days | SELL | $1,001 - $15,000 | -0.56% | |
 Gilbert Cisneros House | Feb 13, 2026 | Jan 30, 2026 | 14 days | BUY | $1,001 - $15,000 | +11.21% | |
Ro Khanna House | Feb 6, 2026 | Jan 29, 2026 | 8 days | BUY | $1,001 - $15,000 | +13.55% | |
Ro Khanna House | Sep 9, 2025 | Aug 26, 2025 | 14 days | BUY | $1,001 - $15,000 | +46.32% |
Biogen (BIIB) congressional trading FAQ
Can members of Congress legally trade Biogen (BIIB) stock?
Yes. Members of Congress are permitted to trade individual stocks, including Biogen (BIIB), but the STOCK Act of 2012 requires them to publicly disclose each transaction within 45 days. BullishWhales tracks those disclosures; it does not imply any trade was improper.
Are congressional Biogen (BIIB) trades public?
Yes. Every congressional trade in Biogen (BIIB) on this page comes from mandatory public STOCK Act disclosure filings, which are filed with a delay and may be revised.
How many times has Congress traded Biogen (BIIB)?
Members of Congress have disclosed 152 trades in Biogen (BIIB) worth $2.4M across 26 members, according to public STOCK Act filings.
Which members of Congress have traded Biogen (BIIB)?
Recent and active filers of Biogen (BIIB) disclosures include Maria Elvira Salazar, Ro Khanna, Gilbert Cisneros. The full member-by-member trade list is on this page.
Do Democrats or Republicans trade Biogen (BIIB) more?
Across disclosed Biogen (BIIB) trades, 70% were by Democrats and 30% by Republicans, led by Democrats (70%).
What is the most recent congressional Biogen (BIIB) trade?
The most recent disclosed Biogen (BIIB) trade was a purchase by Maria Elvira Salazar, filed Jun 7, 2026.
Browse all stocks Congress tradesCongressional trading overviewBiogen (BIIB) stock overview
Not investment advice. Congressional trading data is sourced from public STOCK Act disclosures, which are filed with a delay and may contain errors or be revised. The Tide Score and other figures are generated algorithmically from public filings and market data and describe historical activity, not a recommendation. Always do your own research and consult a licensed financial advisor before making investment decisions.