Michael Gilman

CIK 1291144 · View on SEC EDGAR ↗

Insider

First SEC filing: June 8, 2026 · Latest: June 8, 2026

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Insider at

Insider transactions

0 buys (P) 3 sells (S) Net: $-137,058 + 29 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

29 other filings hidden
Date Ticker Code Shares Price Value Owned after Δ own A/D vs now
July 1, 2026 SRRK S 10b5-1 43 $54.81 $2,357 59,511 Direct -0.07% Disposed 0.8% (price as of 2026-08-19)
July 1, 2026 SRRK S 10b5-1 1,155 $54.23 $62,636 59,554 Direct -1.90% Disposed 1.9% (price as of 2026-08-19)
July 1, 2026 SRRK S 10b5-1 1,346 $53.54 $72,065 60,709 Direct -2.17% Disposed 3.2% (price as of 2026-08-19)
March 15, 2021 SRRK S 10b5-1 4,696 $65.59 $308,011 37,459 Direct -11.14% Disposed -15.8% (price as of 2026-08-19)
Feb. 8, 2021 SRRK S 10b5-1 1,804 $65.06 $117,368 42,155 Direct -4.10% Disposed -15.1% (price as of 2026-08-19)
Jan. 26, 2021 SRRK S 10b5-1 1,518 $59.90 $90,928 43,959 Direct -3.34% Disposed -7.8% (price as of 2026-08-19)
Jan. 26, 2021 SRRK S 10b5-1 1,500 $59.02 $88,530 45,477 Direct -3.19% Disposed -6.4% (price as of 2026-08-19)
Jan. 26, 2021 SRRK S 10b5-1 483 $57.99 $28,009 46,977 Direct -1.02% Disposed -4.7% (price as of 2026-08-19)
Dec. 28, 2004 BIIB S 10b5-1 5,750 $67.50 $388,125 23,000 Direct -20.00% Disposed 224.0% (price as of 2026-08-19)
Dec. 28, 2004 BIIB S 10b5-1 90 $67.53 $6,078 0 Direct -100.00% Disposed 223.9% (price as of 2026-08-19)
Dec. 28, 2004 BIIB S 10b5-1 6,910 $67.50 $466,425 90 Direct -98.71% Disposed 224.0% (price as of 2026-08-19)
Dec. 9, 2004 BIIB S 10b5-1 7,763 $65.00 $504,595 15,524 Direct -33.34% Disposed 236.5% (price as of 2026-08-19)
Dec. 9, 2004 BIIB S 10b5-1 7,500 $65.00 $487,500 7,000 Direct -51.72% Disposed 236.5% (price as of 2026-08-19)
Sept. 13, 2004 BIIB S 10b5-1 30,000 $62.50 $1,875,000 14,500 Direct -67.42% Disposed 249.9% (price as of 2026-08-19)

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
June 4, 2026 SRRK Stock Option (Right to Buy) Common Stock (4,310) $45.33 June 4, 2036 4,310 Acquired
May 22, 2025 SRRK Stock Option (Right to Buy) Common Stock (9,206) $30.46 May 22, 2035 9,206 Acquired
June 16, 2022 SRRK Stock Option (Right to Buy) Common Stock (14,000) $4.86 June 16, 2032 14,000 Acquired
May 26, 2022 SRRK Stock Option (Right to Buy) Common Stock (28,000) $4.75 May 26, 2032 28,000 Acquired
May 27, 2021 SRRK Stock Option (Right to Buy) Common Stock (7,800) $26.78 May 27, 2031 7,800 Acquired
Jan. 26, 2021 SRRK Stock Option (Right to Buy) Common Stock (1,313) $5.77 Feb. 20, 2028 1,313 Disposed
Jan. 26, 2021 SRRK Stock Option (Right to Buy) Common Stock (2,188) $5.77 Feb. 20, 2028 2,188 Disposed
June 16, 2020 SRRK Stock Option (right to buy) Common Stock (13,000) $17.65 June 16, 2030 13,000 Acquired
May 21, 2019 SRRK Stock Option (Right to Buy) Common Stock (10,158) $21.21 May 21, 2029 10,158 Acquired
June 22, 2018 SRRK Stock Option (right to buy) Common Stock (20,316) $21.62 June 22, 2028 20,316 Acquired
Feb. 17, 2005 BIIB Stock Option (right-to-buy) [F1] Common Stock (70,000) $67.57 Feb. 17, 2015 70,000 Acquired
Dec. 28, 2004 BIIB Stock Option (right-to-buy) [F2] Common Stock (5,750) $45.46 Dec. 15, 2010 5,750 Disposed
Dec. 28, 2004 BIIB Stock Option (right-to-buy) [F2] Common Stock (7,000) $44.54 May 17, 2009 7,000 Disposed
Dec. 9, 2004 BIIB Stock Option (right-to-buy) [F2] Common Stock (7,763) $37.45 Dec. 6, 2012 7,763 Disposed
Dec. 9, 2004 BIIB Stock Option (right-to-buy) [F2] Common Stock (7,500) $44.54 May 17, 2009 7,500 Disposed
Sept. 13, 2004 BIIB Stock Option (right-to-buy) [F3] Common Stock (30,000) $44.54 May 17, 2009 30,000 Disposed
June 15, 2004 BIIB Stock Option (right-to-buy) [F2] Common Stock (25,000) $59.39 June 15, 2014 25,000 Acquired

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

Initial ownership (Form 3) 12 holdings

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

Date Ticker Security Shares Ownership
May 23, 2018 SRRK Common Stock 43,959 Direct
May 23, 2018 SRRK Stock Option (Right to Buy)→ Common Stock (1,313) 1,313 Direct
May 23, 2018 SRRK Stock Option (Right to Buy)→ Common Stock (3,502) 3,502 Direct
May 20, 2004 BIIB Common Stock 8,966 Direct
May 20, 2004 BIIB Stock Option (right-to-buy) [F1]→ Common Stock (44,500) 44,500 Direct
May 20, 2004 BIIB Stock Option (right-to-buy) [F1]→ Common Stock (4,025) 4,025 Direct
May 20, 2004 BIIB Stock Option (right-to-buy) [F1]→ Common Stock (143,750) 143,750 Direct
May 20, 2004 BIIB Stock Option (right-to-buy) [F1]→ Common Stock (23,000) 23,000 Direct
May 20, 2004 BIIB Stock Option (right-to-buy) [F1]→ Common Stock (28,750) 28,750 Direct
May 20, 2004 BIIB Stock Option (right-to-buy) [F1]→ Common Stock (25,300) 25,300 Direct
May 20, 2004 BIIB Stock Option (right-to-buy) [F1]→ Common Stock (23,287) 23,287 Direct
May 20, 2004 BIIB Stock Option (right-to-buy) [F1]→ Common Stock (20,000) 20,000 Direct