*Notional-weighted price return on lawmakers' disclosed buys of BIIB, marked to the latest close — per-share (share counts aren't disclosed).
| Date | Member | Type | Amount | Est. price | Latest close | Return |
|---|---|---|---|---|---|---|
| 2026-05-12 | Hon. Maria Elvira Salazar | BUY | $1K–$15K | $199.36 | $216.03 2026-06-26 | +8.4% |
| 2026-05-11 | Hon. Maria Elvira Salazar | BUY | $50K–$100K | $197.95 | $216.03 2026-06-26 | +9.1% |
| 2026-05-11 | Hon. Maria Elvira Salazar | BUY | $1K–$15K | $197.95 | $216.03 2026-06-26 | +9.1% |
| 2023-01-23 | Hon. Shri Thanedar | SELL | $15K–$50K | $291.93 | $216.03 2026-06-26 | +26.0% exit |
| 2022-01-10 | Hon. Josh Gottheimer | BUY | $1K–$15K | $235.31 | $216.03 2026-06-26 | -8.2% |
| 2021-12-09 | Hon. Josh Gottheimer | SELL | $1K–$15K | $232.43 | $216.03 2026-06-26 | -41.2% rt |
| 2021-09-15 | Hon. Josh Gottheimer | SELL | $1K–$15K | $299.21 | $216.03 2026-06-26 | +11.5% rt |
| 2021-06-08 | Hon. Josh Gottheimer | BUY | $1K–$15K | $395.37 | $216.03 2026-06-26 | -45.4% |
| 2021-02-02 | Hon. Byron Donalds | BUY | $1K–$15K | $277.72 | $216.03 2026-06-26 | -22.2% |
| 2021-01-04 | Hon. Christopher L. Jacobs | SELL | $1K–$15K | $242.95 | $216.03 2026-06-26 | +11.1% exit |
| 2020-07-07 | Hon. Josh Gottheimer | BUY | $1K–$15K | $268.35 | $216.03 2026-06-26 | -19.5% |
| 2019-09-11 | Hon. Dean Phillips | SELL | $1K–$15K | $235.96 | $216.03 2026-06-26 | +0.4% rt |
| 2019-06-20 | Hon. Dean Phillips | BUY | $1K–$15K | $234.97 | $216.03 2026-06-26 | -8.1% |
| 2019-03-22 | Sheldon Whitehouse | SELL | $1K–$15K | $216.71 | $216.03 2026-06-26 | -44.2% rt |
| 2018-10-05 | Hon. Gary Palmer | SELL | $1K–$15K | $342.08 | $216.03 2026-06-26 | +36.9% exit |
| 2018-01-08 | Sheldon Whitehouse | SELL | $1K–$15K | $329.65 | $216.03 2026-06-26 | -14.0% rt |
| 2017-06-07 | Hon. James B. Renacci | BUY | $1K–$15K | $255.43 | $216.03 2026-06-26 | -15.4% |
| 2017-03-29 | Hon. Lamar Smith | SELL | $1K–$15K | $268.53 | $216.03 2026-06-26 | -11.8% rt |
| 2017-01-30 | Hon. Cheri Bustos | SELL | $15K–$50K | $276.06 | $216.03 2026-06-26 | +21.8% exit |
| 2016-12-23 | Sheldon Whitehouse | SELL | $1K–$15K | $287.53 | $216.03 2026-06-26 | -25.0% rt |
| 2016-12-13 | Sheldon Whitehouse | SELL | $15K–$50K | $287.38 | $216.03 2026-06-26 | -31.3% rt |
| 2016-11-21 | Hon. James B. Renacci | BUY | $1K–$15K | $318.32 | $216.03 2026-06-26 | -32.1% |
| 2016-08-11 | Hon. Kurt Schrader | BUY | $1K–$15K | $314.49 | $216.03 2026-06-26 | -31.3% |
| 2016-08-03 | Hon. James B. Renacci | BUY | $1K–$15K | $321.34 | $216.03 2026-06-26 | -32.8% |
| 2016-08-02 | Hon. James B. Renacci | BUY | $1K–$15K | $330.11 | $216.03 2026-06-26 | -34.6% |
| 2016-07-28 | JOHN BOOZMAN | SELL | $1K–$15K | $289.03 | $216.03 2026-06-26 | +25.3% exit |
| 2016-07-21 | James M Inhofe | SELL | $50K–$100K | $282.45 | $216.03 2026-06-26 | -29.3% rt |
| 2016-07-20 | Hon. James B. Renacci | BUY | $15K–$50K | $262.41 | $216.03 2026-06-26 | -17.7% |
| 2016-06-03 | Hon. Ed Whitfield | SELL | $1K–$15K | $290.23 | $216.03 2026-06-26 | +10.7% rt |
| 2016-06-01 | Hon. James B. Renacci | BUY | $1K–$15K | $286.82 | $216.03 2026-06-26 | -24.7% |
| 2016-05-31 | Hon. James B. Renacci | BUY | $1K–$15K | $289.73 | $216.03 2026-06-26 | -25.4% |
| 2016-05-26 | Hon. James B. Renacci | BUY | $1K–$15K | $282.00 | $216.03 2026-06-26 | -23.4% |
| 2016-04-13 | Hon. Ed Whitfield | SELL | $1K–$15K | $271.73 | $216.03 2026-06-26 | +0.7% rt |
| 2016-04-01 | Hon. K. Michael Conaway | SELL | $1K–$15K | $260.54 | $216.03 2026-06-26 | -20.6% rt |
| 2016-03-17 | Hon. Tom Price | BUY | $1K–$15K | $246.31 | $216.03 2026-06-26 | -12.3% |
| 2016-02-12 | Hon. James B. Renacci | BUY | $1K–$15K | $247.22 | $216.03 2026-06-26 | -12.6% |
| 2016-02-04 | Hon. Ed Whitfield | BUY | $1K–$15K | $273.27 | $216.03 2026-06-26 | -20.9% |
| 2016-01-25 | Hon. Ed Whitfield | BUY | $1K–$15K | $262.10 | $216.03 2026-06-26 | -17.6% |
| 2016-01-19 | Hon. Ed Whitfield | BUY | $1K–$15K | $269.85 | $216.03 2026-06-26 | -19.9% |
| 2016-01-11 | Hon. James B. Renacci | BUY | $1K–$15K | $278.54 | $216.03 2026-06-26 | -22.4% |
| 2015-12-09 | Hon. James B. Renacci | BUY | $15K–$50K | $284.61 | $216.03 2026-06-26 | -24.1% |
| 2015-09-15 | Hon. James B. Renacci | BUY | $1K–$15K | $319.86 | $216.03 2026-06-26 | -32.5% |
| 2015-08-28 | Sheldon Whitehouse | BUY | $1K–$15K | $303.69 | $216.03 2026-06-26 | -28.9% |
| 2015-08-27 | Hon. Lamar Smith | BUY | $1K–$15K | $304.49 | $216.03 2026-06-26 | -29.1% |
| 2015-08-26 | Hon. James B. Renacci | BUY | $1K–$15K | $298.25 | $216.03 2026-06-26 | -27.6% |
| 2015-08-10 | Sheldon Whitehouse | BUY | $1K–$15K | $314.94 | $216.03 2026-06-26 | -31.4% |
| 2015-08-10 | Sheldon Whitehouse | BUY | $1K–$15K | $314.94 | $216.03 2026-06-26 | -31.4% |
| 2015-08-04 | Sheldon Whitehouse | BUY | $1K–$15K | $330.38 | $216.03 2026-06-26 | -34.6% |
| 2015-08-04 | Sheldon Whitehouse | BUY | $1K–$15K | $330.38 | $216.03 2026-06-26 | -34.6% |
| 2015-07-31 | Hon. James B. Renacci | BUY | $1K–$15K | $318.78 | $216.03 2026-06-26 | -32.2% |
Return: buys marked to the latest close (open); sells tagged rt are realized round-trips vs a prior disclosed buy; exit = timing (stock move after the sale, seller's perspective).