Insider at

04

Insider transactions

05
0 buys (P) 0 sells (S) Net: $0 + 18 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

18 other filings hidden
DateTickerCodeSharesPriceValue Owned afterΔ ownA/Dvs now
July 26, 2006 BIIB S 10b5-1 4,000 $41.45 $165,800 40,250 Direct -9.04% Disposed 430.5% (price as of 2026-10-02)
July 26, 2006 BIIB S 10b5-1 5,000 $41.32 $206,600 44,250 Direct -10.15% Disposed 432.1% (price as of 2026-10-02)
July 26, 2006 BIIB S 10b5-1 5,000 $41.18 $205,900 49,250 Direct -9.22% Disposed 433.9% (price as of 2026-10-02)
July 26, 2006 BIIB S 10b5-1 5,000 $41.13 $205,650 54,250 Direct -8.44% Disposed 434.6% (price as of 2026-10-02)
July 26, 2006 BIIB S 10b5-1 7,500 $40.61 $304,575 59,250 Direct -11.24% Disposed 441.4% (price as of 2026-10-02)
July 26, 2006 BIIB S 10b5-1 2,500 $40.30 $100,750 66,750 Direct -3.61% Disposed 445.6% (price as of 2026-10-02)
July 25, 2006 BIIB S 10b5-1 20,000 $41.55 $831,000 40,250 Direct -33.20% Disposed 429.2% (price as of 2026-10-02)
July 24, 2006 BIIB S 10b5-1 5,000 $40.91 $204,550 40,250 Direct -11.05% Disposed 437.5% (price as of 2026-10-02)
July 24, 2006 BIIB S 10b5-1 5,000 $40.90 $204,500 45,250 Direct -9.95% Disposed 437.6% (price as of 2026-10-02)
July 24, 2006 BIIB S 10b5-1 7,500 $40.86 $306,450 50,250 Direct -12.99% Disposed 438.1% (price as of 2026-10-02)
July 24, 2006 BIIB S 10b5-1 2,500 $40.58 $101,450 57,750 Direct -4.15% Disposed 441.8% (price as of 2026-10-02)

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
May 25, 2007 BIIB Restricted Stock Unit Common Stock (1,250) · May 25, 2007 1,250 Disposed
July 26, 2006 BIIB Stock Option (right-to-buy) [F4] Common Stock (29,000) $15.16 Sept. 20, 2006 29,000 Disposed
July 25, 2006 BIIB Stock Option (right-to-buy) [F4] Common Stock (20,000) $15.16 Sept. 20, 2006 20,000 Disposed
July 24, 2006 BIIB Stock Option (right-to-buy) [F4] Common Stock (20,000) $15.16 Sept. 20, 2006 20,000 Disposed
May 25, 2006 BIIB Restricted Stock Units Common Stock (1,250) · · 1,250 Acquired
May 25, 2006 BIIB Employee Stock Option (right-to-buy) [F1] Common Stock (3,125) $46.99 May 24, 2016 3,125 Acquired
Jan. 9, 2006 BIIB Employee Stock Option (right-to-buy) [F1] Common Stock (12,500) $47.55 Jan. 9, 2016 12,500 Acquired
Jan. 3, 2005 BIIB Employee Stock Option (right-to-buy) [F1] Common Stock (12,500) $66.29 Jan. 3, 2015 12,500 Acquired
Jan. 2, 2004 BIIB Non-Qualified Stock Option (right to buy) [F1] Common Stock (12,500) $36.94 Jan. 1, 2014 12,500 Acquired
Nov. 14, 2003 BIIB 1985 NQ Stock Option Common Stock (34,500) $76.39 Sept. 20, 2009 34,500 Acquired
Nov. 12, 2003 BIIB 1985 NQ Stock Option Common Stock (34,500) $26.80 Sept. 20, 2012 34,500 Acquired
Nov. 12, 2003 BIIB 1985 NQ Stock Option Common Stock (69,000) $15.16 Sept. 20, 2006 69,000 Acquired

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

Initial ownership (Form 3) 1 holding

07

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

DateTickerSecuritySharesOwnership
Nov. 14, 2003 BIIB No Secu rities Beneficially owned. 0 Direct