*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 |
|---|---|---|---|---|---|---|
| 2015-07-30 | Hon. James B. Renacci | BUY | $1K–$15K | $317.00 | $216.03 2026-06-26 | -31.9% |
| 2015-07-23 | Hon. Alan S. Lowenthal | SELL | $1K–$15K | $385.05 | $216.03 2026-06-26 | -10.7% rt |
| 2015-07-10 | Sheldon Whitehouse | BUY | $1K–$15K | $388.23 | $216.03 2026-06-26 | -44.4% |
| 2015-07-09 | James M Inhofe | BUY | $15K–$50K | $399.29 | $216.03 2026-06-26 | -45.9% |
| 2015-05-12 | Hon. James B. Renacci | BUY | $1K–$15K | $395.30 | $216.03 2026-06-26 | -45.4% |
| 2015-05-07 | Sheldon Whitehouse | BUY | $15K–$50K | $383.29 | $216.03 2026-06-26 | -43.6% |
| 2015-05-07 | Sheldon Whitehouse | BUY | $15K–$50K | $383.29 | $216.03 2026-06-26 | -43.6% |
| 2015-05-06 | Hon. James B. Renacci | BUY | $1K–$15K | $383.56 | $216.03 2026-06-26 | -43.7% |
| 2015-04-15 | Hon. Alan S. Lowenthal | BUY | $15K–$50K | $430.96 | $216.03 2026-06-26 | -49.9% |
| 2015-04-07 | Sheldon Whitehouse | BUY | $1K–$15K | $418.09 | $216.03 2026-06-26 | -48.3% |
| 2015-03-30 | Hon. James B. Renacci | BUY | $1K–$15K | $431.62 | $216.03 2026-06-26 | -50.0% |
| 2015-03-20 | Hon. James B. Renacci | BUY | $1K–$15K | $475.98 | $216.03 2026-06-26 | -54.6% |
| 2014-12-02 | Hon. K. Michael Conaway | BUY | $1K–$15K | $328.27 | $216.03 2026-06-26 | -34.2% |
| 2014-07-23 | Susan M Collins | SELL | $1K–$15K | $337.60 | $216.03 2026-06-26 | +36.0% exit |
| 2014-07-23 | Susan M Collins | SELL | $1K–$15K | $337.60 | $216.03 2026-06-26 | +36.0% exit |
| 2014-03-27 | Susan M Collins | SELL | $1K–$15K | $309.76 | $216.03 2026-06-26 | +30.3% exit |
| 2013-06-05 | SUSAN M COLLINS | SELL | $1K–$15K | $214.10 | $216.03 2026-06-26 | -0.9% exit |
| 2013-06-04 | SUSAN M COLLINS | SELL | $1K–$15K | $219.74 | $216.03 2026-06-26 | +1.7% exit |
| Hon. James B. Renacci | BUY | $1K–$15K | — | — | — |
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).