BIIB congressional trades
Biogen Inc. (BIIB) appears in 11 congressional disclosure rows from 5 members of Congress in 2025–2026 periodic reports: 8 purchases and 3 sales, with trade dates from Feb 25, 2025 to Aug 18, 2026. Maria Salazar reported the most, with 4 rows. The median gap between trade date and filing date is 28 days, and 1 trade was reported more than 45 days after it happened.
Rows keep the disclosed owner and amount range. This is a record of reported transactions, not a live BIIB portfolio or a trading signal.
- 11
- 5
- 8 / 3
- $74K – $285K
- sum of reported ranges
- 2026-08-18
Verified BIIB congressional disclosures
Parsed from official House Clerk and Senate eFD filings. This snapshot contains 8 purchases and 3 sales. Reported owners: Self. Transaction dates run from 2025-02-25 to 2026-08-18.
| Politician | Trade date | Asset | Type | Owner | Amount | Filing |
|---|---|---|---|---|---|---|
| Kevin Hern | Biogen Inc. - Common Stock | Sale | Self | $1,001 - $15,000 | #20035326 Filed 2026-09-01 | |
| Gilbert Cisneros | Biogen Inc. - Common Stock | Purchase | Self | $1,001 - $15,000 | #20034906 Filed 2026-07-02 | |
| Maria Salazar | Biogen Inc. - Common Stock | Sale | Self | $15,001 - $50,000 | #20034928 Filed 2026-07-07 | |
| Maria Salazar | Biogen Inc. - Common Stock | Purchase | Self | $1,001 - $15,000 | #20034709 Filed 2026-06-08 | |
| Maria Salazar | Biogen Inc. - Common Stock | Purchase | Self | $1,001 - $15,000 | #20034709 Filed 2026-06-08 | |
| Maria Salazar | Biogen Inc. - Common Stock | Purchase | Self | $50,001 - $100,000 | #20034709 Filed 2026-06-08 | |
| Alan Armstrong | Biogen Inc. - Common Stock | Purchase | Self | $1,001 - $15,000 | #fda235b3-bad7-4637-8fa1-053f354d929c Filed 2026-07-21 | |
| Gilbert Cisneros | Biogen Inc. - Common Stock | Purchase | Self | $1,001 - $15,000 | #20033983 Filed 2026-02-13 | |
| Robert Bresnahan | Biogen Inc. - Common Stock | Purchase | Self | $1,001 - $15,000 | #20030482 Filed 2025-06-09 | |
| Robert Bresnahan | Biogen Inc. - Common Stock | Sale | Self | $1,001 - $15,000 | #20030291 Filed 2025-05-08 | |
| Robert Bresnahan | Biogen Inc. - Common Stock | Purchase | Self | $1,001 - $15,000 | #20029034 Filed 2025-03-27 |
A filing can describe the member, a spouse, a dependent, or a joint asset. Amounts are statutory ranges, not execution prices. See how to read congressional stock-trade disclosures before treating a delayed row as a trading signal.
BIIB disclosures by member
| Member | Rows | Buys | Sells | Last trade |
|---|---|---|---|---|
| Maria Salazar's BIIB trades | 4 | 3 | 1 | 2026-06-02 |
| Robert Bresnahan's BIIB trades | 3 | 2 | 1 | 2025-05-15 |
| Gilbert Cisneros | 2 | 2 | 0 | 2026-06-05 |
| Alan Armstrong | 1 | 1 | 0 | 2026-03-27 |
| Kevin Hern | 1 | 0 | 1 | 2026-08-18 |
How long disclosure took
Days from trade date to filing date for 11 rows. The STOCK Act allows 30 days from notification and no more than 45 days from the trade. A late row is a timing fact, not evidence of wrongdoing.
- 0–15 days
- 2
- 16–30 days
- 7
- 31–45 days
- 1
- Over 45 days
- 1
- Median / longest
- 28d / 116d
Source documents
9 House Clerk and Senate eFD periodic transaction reports, newest first. Each link opens the official filing.
- #20035326Filed 2026-09-01 · 1 row
- #fda235b3-bad7-4637-8fa1-053f354d929cFiled 2026-07-21 · 1 row
- #20034928Filed 2026-07-07 · 1 row
- #20034906Filed 2026-07-02 · 1 row
- #20034709Filed 2026-06-08 · 3 rows
- #20033983Filed 2026-02-13 · 1 row
- #20030482Filed 2025-06-09 · 1 row
- #20030291Filed 2025-05-08 · 1 row
- #20029034Filed 2025-03-27 · 1 row
What BIIB filings don’t tell you
A disclosure row records a trade date, an amount bracket, and who owned the asset. It does not say why the trade was made, whether the position is still held, or anything about the business behind the ticker: revenue trends, margins, balance-sheet risk, or valuation. Those answers are in company filings, not congressional ones.
- Biogen Inc. financials and filings
Audited SEC figures, what moves BIIB, and primary sources.
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BIIB congressional trades — FAQ
Who in Congress traded BIIB?
House Clerk and Senate eFD periodic reports for 2025 and 2026 contain 11 verified BIIB rows from 5 members: Alan Armstrong, Gilbert Cisneros, Kevin Hern, Maria Salazar, and Robert Bresnahan. Image-only filings are excluded, and this is not a live brokerage statement.
Does this page show current BIIB holdings?
No. STOCK Act filings disclose reportable transactions after the fact, usually within 45 days, as amount ranges and owners. They do not prove a current position, an exact share count, or why the trade happened.
Why are BIIB amounts shown as ranges?
Congressional periodic transaction reports use statutory value bands such as $1,001 - $15,000; $15,001 - $50,000; $50,001 - $100,000. Yield Theory keeps those ranges instead of inventing a midpoint, exact trade size, or return.
How complete is BIIB congressional-trade coverage?
This snapshot covers every machine-readable House and Senate periodic transaction report for 2025 and 2026 (176 members). Image-only House filings and paper Senate filings are not included, so missing rows are not proof that no other lawmaker traded BIIB.
Yield Theory is not affiliated with any elected official. This page uses the 2025–2026 House Clerk and Senate eFD periodic report snapshot generated 2026-10-06. It is not a complete lifetime portfolio, a performance track record, or investment advice.
A disclosure is not a thesis.
This page shows who reported BIIB and in what range. Membership is the monthly sourced call, plus a five-minute check when the evidence moves. $39/month or $249/year.
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