Sean Godbout
CIK 2057736 · View on SEC EDGAR ↗
Insider
First SEC filing: March 10, 2025 · Latest: April 3, 2026
On this page
Insider at
Insider transactions
0 buys (P)
0 sells (S)
Net:
$0
+ 17 non-open-market transactions below
last 12 months, based on the transactions shown below
Price change vs current quote, split-adjusted for corporate actions since the filing — not benchmarked, not annualized, not size-weighted
No open-market trades on record; showing all filings.
| Date | Ticker | Code | Shares | Price | Value | Owned after | Δ own | A/D | vs now |
|---|---|---|---|---|---|---|---|---|---|
| April 1, 2026 | BIIB | M | 181 | — | — | 364 Direct | -33.21% | Disposed | (price as of 2026-08-21) |
| April 1, 2026 | BIIB | F | 54 | $183.78 | $9,924 | 1,342 Direct | -3.87% | Disposed | 17.3% (price as of 2026-08-21) |
| April 1, 2026 | BIIB | M | 181 | — | — | 1,396 Direct | +14.90% | Acquired | (price as of 2026-08-21) |
| Feb. 13, 2026 | BIIB | A | 1,800 | — | — | 1,800 Direct | — | Acquired | (price as of 2026-08-21) |
| Feb. 6, 2026 | BIIB | M | 517 | — | — | 1,035 Direct | -33.31% | Disposed | (price as of 2026-08-21) |
| Feb. 6, 2026 | BIIB | M | 305 | — | — | 305 Direct | -50.00% | Disposed | (price as of 2026-08-21) |
| Feb. 6, 2026 | BIIB | M | 257 | — | — | 0 Direct | -100.00% | Disposed | (price as of 2026-08-21) |
| Feb. 6, 2026 | BIIB | F | 180 | $201.18 | $36,212 | 1,215 Direct | -12.90% | Disposed | 7.2% (price as of 2026-08-21) |
| Feb. 6, 2026 | BIIB | M | 517 | — | — | 1,395 Direct | +58.88% | Acquired | (price as of 2026-08-21) |
| Feb. 6, 2026 | BIIB | F | 103 | $201.18 | $20,722 | 878 Direct | -10.50% | Disposed | 7.2% (price as of 2026-08-21) |
| Feb. 6, 2026 | BIIB | M | 305 | — | — | 981 Direct | +45.12% | Acquired | (price as of 2026-08-21) |
| Feb. 6, 2026 | BIIB | F | 76 | $201.18 | $15,290 | 676 Direct | -10.11% | Disposed | 7.2% (price as of 2026-08-21) |
| Feb. 6, 2026 | BIIB | M | 257 | — | — | 752 Direct | +51.92% | Acquired | (price as of 2026-08-21) |
| Oct. 2, 2025 | BIIB | M | 26 | — | — | 27 Direct | -49.06% | Disposed | (price as of 2026-08-21) |
| Oct. 2, 2025 | BIIB | F | 8 | $155.25 | $1,242 | 495 Direct | -1.59% | Disposed | 38.9% (price as of 2026-08-21) |
| Oct. 2, 2025 | BIIB | M | 26 | — | — | 503 Direct | +5.45% | Acquired | (price as of 2026-08-21) |
| April 1, 2025 | BIIB | A | 545 | — | — | 545 Direct | — | Acquired | (price as of 2026-08-21) |
P = Open-market purchase · S = Sale · A = Grant/award · M = Option exercise · G = Gift · F = Tax withholding
Insider transactions are not a recommendation; sales are often driven by liquidity or tax reasons.
Derivative holdings (Form 4 Table II)
Options, RSUs and convertible securities reported on Form 4 Table II.
| Date | Ticker | Security | Underlying | Exercise price | Expiration | Shares | A/D |
|---|---|---|---|---|---|---|---|
| April 1, 2026 | BIIB | Restricted Stock Unit | Common Stock (181) | $0.00 | April 1, 2028 | 181 | Disposed |
| Feb. 13, 2026 | BIIB | Restricted Stock Unit | Common Stock (1,800) | $0.00 | Feb. 13, 2029 | 1,800 | Acquired |
| Feb. 6, 2026 | BIIB | Restricted Stock Unit | Common Stock (517) | $0.00 | Feb. 6, 2028 | 517 | Disposed |
| Feb. 6, 2026 | BIIB | Restricted Stock Unit | Common Stock (305) | $0.00 | Feb. 7, 2027 | 305 | Disposed |
| Feb. 6, 2026 | BIIB | Restricted Stock Unit | Common Stock (257) | $0.00 | Feb. 8, 2026 | 257 | Disposed |
| Oct. 2, 2025 | BIIB | Restricted Stock Unit | Common Stock (26) | $0.00 | Oct. 2, 2026 | 26 | Disposed |
| April 1, 2025 | BIIB | Restricted Stock Unit | Common Stock (545) | $0.00 | April 1, 2028 | 545 | Acquired |
Exercise/conversion price is blank when not applicable (e.g. RSUs).
Initial ownership (Form 3) 5 holdings
Securities held when first becoming an insider, per SEC Form 3.
| Date | Ticker | Security | Shares | Ownership |
|---|---|---|---|---|
| March 10, 2025 | BIIB | Common Stock | 310 | Direct |
| March 10, 2025 | BIIB | Restricted Stock Unit→ Common Stock (1,552) | 1,552 | Direct |
| March 10, 2025 | BIIB | Restricted Stock Unit→ Common Stock (610) | 610 | Direct |
| March 10, 2025 | BIIB | Restricted Stock Unit→ Common Stock (53) | 53 | Direct |
| March 10, 2025 | BIIB | Restricted Stock Unit→ Common Stock (257) | 257 | Direct |