Insider at

04

Insider transactions

05
0 buys (P) 0 sells (S) Net: $0 + 34 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.

DateTickerCodeSharesPriceValue Owned afterΔ ownA/Dvs now
March 1, 2019 BIIB J 280 · · 0 Direct -100.00% Disposed (price as of 2026-10-05)
March 1, 2019 BIIB M 568 · · 280 Direct -66.98% Disposed (price as of 2026-10-05)
March 1, 2019 BIIB F 253 $334.10 $84,527 7,235 Direct -3.38% Disposed -33.7% (price as of 2026-10-05)
March 1, 2019 BIIB M 568 · · 7,488 Direct +8.21% Acquired (price as of 2026-10-05)
March 1, 2019 BIIB F 405 $334.10 $135,310 6,920 Direct -5.53% Disposed -33.7% (price as of 2026-10-05)
Feb. 15, 2019 BIIB J 888 · · 2,338 Direct -27.53% Disposed (price as of 2026-10-05)
Feb. 15, 2019 BIIB M 1,448 · · 3,226 Direct -30.98% Disposed (price as of 2026-10-05)
Feb. 15, 2019 BIIB F 643 $332.87 $214,035 7,325 Direct -8.07% Disposed -33.5% (price as of 2026-10-05)
Feb. 15, 2019 BIIB M 1,448 · · 7,968 Direct +22.21% Acquired (price as of 2026-10-05)
Feb. 12, 2019 BIIB M 1,263 · · 5,640 Direct +28.86% Acquired (price as of 2026-10-05)
Feb. 12, 2019 BIIB F 380 $319.43 $121,383 5,260 Direct -6.74% Disposed -30.7% (price as of 2026-10-05)
Feb. 12, 2019 BIIB A 10,960 · · 10,960 Direct · Acquired (price as of 2026-10-05)
Feb. 12, 2019 BIIB J 1,357 · · 6,314 Direct -17.69% Disposed (price as of 2026-10-05)
Feb. 12, 2019 BIIB M 1,799 · · 7,671 Direct -19.00% Disposed (price as of 2026-10-05)
Feb. 12, 2019 BIIB M 1,263 · · 2,527 Direct -33.32% Disposed (price as of 2026-10-05)
Feb. 12, 2019 BIIB F 539 $319.43 $172,173 6,520 Direct -7.64% Disposed -30.7% (price as of 2026-10-05)
Feb. 12, 2019 BIIB M 1,799 · · 7,059 Direct +34.20% Acquired (price as of 2026-10-05)
March 1, 2018 BIIB F 237 $282.35 $66,917 4,302 Direct -5.22% Disposed -21.6% (price as of 2026-10-05)
March 1, 2018 BIIB M 532 · · 4,539 Direct +13.28% Acquired (price as of 2026-10-05)
March 1, 2018 BIIB F 405 $282.35 $114,352 4,007 Direct -9.18% Disposed -21.6% (price as of 2026-10-05)
March 1, 2018 BIIB J 312 · · 848 Direct -26.90% Disposed (price as of 2026-10-05)
March 1, 2018 BIIB M 532 · · 1,160 Direct -31.44% Disposed (price as of 2026-10-05)
Feb. 15, 2018 BIIB J 864 · · 4,674 Direct -15.60% Disposed (price as of 2026-10-05)
Feb. 15, 2018 BIIB M 1,472 · · 5,538 Direct -21.00% Disposed (price as of 2026-10-05)
Feb. 15, 2018 BIIB F 442 $299.38 $132,326 4,412 Direct -9.11% Disposed -26.0% (price as of 2026-10-05)
Feb. 15, 2018 BIIB M 1,472 · · 4,854 Direct +43.52% Acquired (price as of 2026-10-05)
Feb. 12, 2018 BIIB A 9,470 · · 9,470 Direct · Acquired (price as of 2026-10-05)
Feb. 12, 2018 BIIB A 3,790 · · 3,790 Direct · Acquired (price as of 2026-10-05)
March 1, 2017 BIIB J 363 · · 1,692 Direct -17.66% Disposed (price as of 2026-10-05)
March 1, 2017 BIIB M 481 · · 2,055 Direct -18.97% Disposed (price as of 2026-10-05)
March 1, 2017 BIIB A 2,730 · · 3,291 Direct +486.63% Acquired (price as of 2026-10-05)
March 1, 2017 BIIB F 157 $293.26 $46,042 561 Direct -21.87% Disposed -24.5% (price as of 2026-10-05)
March 1, 2017 BIIB M 481 · · 718 Direct +202.95% Acquired (price as of 2026-10-05)
Feb. 15, 2017 BIIB A 7,010 · · 7,010 Direct · Acquired (price as of 2026-10-05)

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.

06
DateTickerSecurityUnderlying Exercise priceExpirationSharesA/D
March 1, 2019 BIIB Restricted Stock Unit Common Stock (280) $0.00 March 1, 2019 280 Disposed
March 1, 2019 BIIB Restricted Stock Unit Common Stock (568) $0.00 March 1, 2019 568 Disposed
Feb. 15, 2019 BIIB Restricted Stock Unit Common Stock (888) $0.00 Feb. 15, 2020 888 Disposed
Feb. 15, 2019 BIIB Restricted Stock Unit Common Stock (1,448) $0.00 Feb. 15, 2020 1,448 Disposed
Feb. 12, 2019 BIIB Restricted Stock Unit Common Stock (10,960) $0.00 Feb. 12, 2022 10,960 Acquired
Feb. 12, 2019 BIIB Restricted Stock Unit Common Stock (1,357) $0.00 Feb. 12, 2021 1,357 Disposed
Feb. 12, 2019 BIIB Restricted Stock Unit Common Stock (1,799) $0.00 Feb. 12, 2021 1,799 Disposed
Feb. 12, 2019 BIIB Restricted Stock Unit Common Stock (1,263) $0.00 Feb. 12, 2020 1,263 Disposed
March 1, 2018 BIIB Restricted Stock Unit Common Stock (312) $0.00 March 1, 2019 312 Disposed
March 1, 2018 BIIB Restricted Stock Unit Common Stock (532) $0.00 March 1, 2019 532 Disposed
Feb. 15, 2018 BIIB Restricted Stock Unit Common Stock (864) $0.00 Feb. 15, 2020 864 Disposed
Feb. 15, 2018 BIIB Restricted Stock Unit Common Stock (1,472) $0.00 Feb. 15, 2020 1,472 Disposed
Feb. 12, 2018 BIIB Restricted Stock Unit Common Stock (9,470) $0.00 Feb. 12, 2021 9,470 Acquired
Feb. 12, 2018 BIIB Restricted Stock Unit Common Stock (3,790) $0.00 Feb. 12, 2020 3,790 Acquired
March 1, 2017 BIIB Restricted Stock Unit Common Stock (363) $0.00 March 1, 2019 363 Disposed
March 1, 2017 BIIB Restricted Stock Unit Common Stock $0.00 March 1, 2019 481 Disposed
Feb. 15, 2017 BIIB Restricted Stock Unit Common Stock (7,010) $0.00 Feb. 15, 2020 7,010 Acquired

Exercise/conversion price is blank when not applicable (e.g. RSUs).

Initial ownership (Form 3) 2 holdings

07

Securities held when first becoming an insider, per SEC Form 3.

DateTickerSecuritySharesOwnership
July 7, 2016 BIIB Common Stock 210 Direct
July 7, 2016 BIIB Restricted Stock Unit→ Common Stock (2,480) 2,480 Direct

Compensation (DEF 14A)

08

Matched by name from proxy statements (DEF 14A) — verify against the filing.

Fiscal yearSalaryBonusStock awards Option awardsNon-equity incentivePension changeOtherTotal
2017 $600,433 · $3,514,451 · $796,648 $2,471 $101,254 $5,015,257

Figures from the Summary Compensation Table of the company's proxy statement (DEF 14A). Compensation is not a recommendation.