BUCKNUM THOMAS J

Insider

First SEC filing: Feb. 22, 2005 · Latest: Feb. 22, 2005

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Insider at Companies where this person is a reporting insider.
Insider transactions Every share this person bought or sold, from Form 4 filings.
Derivatives Options and other derivative holdings reported by this person.

Insider at

BIIB selling Feb. 18, 2005

Insider transactions

0 buys (P) 0 sells (S) Net: $0 + 25 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

25 other filings hidden

Date	Ticker	Code	Shares	Price	Value	Owned after	Δ own	A/D	vs now
Feb. 18, 2005	BIIB	M	23,000	—	—	5,750 Direct	-80.00%	Disposed	(price as of 2026-08-19)
Feb. 18, 2005	BIIB	M	57,500	—	—	0 Direct	-100.00%	Disposed	(price as of 2026-08-19)
Feb. 18, 2005	BIIB	M	9,200	—	—	0 Direct	-100.00%	Disposed	(price as of 2026-08-19)
Feb. 18, 2005	BIIB	S	23,000	$67.12	$1,543,760	5,750 Direct	-80.00%	Disposed	225.8% (price as of 2026-08-19)
Feb. 18, 2005	BIIB	M	23,000	$45.46	$1,045,580	28,750 Direct	+400.00%	Acquired	381.1% (price as of 2026-08-19)
Feb. 18, 2005	BIIB	S	57,500	$67.12	$3,859,400	0 Direct	-100.00%	Disposed	225.8% (price as of 2026-08-19)
Feb. 18, 2005	BIIB	M	57,500	$47.15	$2,711,125	57,500 Direct	—	Acquired	363.9% (price as of 2026-08-19)
Feb. 18, 2005	BIIB	S	9,200	$67.12	$617,504	0 Direct	-100.00%	Disposed	225.8% (price as of 2026-08-19)
Feb. 18, 2005	BIIB	M	9,200	$35.42	$325,864	9,200 Direct	—	Acquired	517.5% (price as of 2026-08-19)
Feb. 17, 2005	BIIB	A	55,000	—	—	55,000 Direct	—	Acquired	(price as of 2026-08-19)
Nov. 30, 2004	BIIB	M	9,200	—	—	0 Direct	-100.00%	Disposed	(price as of 2026-08-19)
Nov. 30, 2004	BIIB	M	9,200	—	—	0 Direct	-100.00%	Disposed	(price as of 2026-08-19)
Nov. 30, 2004	BIIB	M	15,500	—	—	0 Direct	-100.00%	Disposed	(price as of 2026-08-19)
Nov. 30, 2004	BIIB	S	9,200	$59.00	$542,800	0 Direct	-100.00%	Disposed	270.7% (price as of 2026-08-19)
Nov. 30, 2004	BIIB	M	9,200	$15.54	$142,968	9,200 Direct	—	Acquired	1307.4% (price as of 2026-08-19)
Nov. 30, 2004	BIIB	S	9,200	$59.00	$542,800	0 Direct	-100.00%	Disposed	270.7% (price as of 2026-08-19)
Nov. 30, 2004	BIIB	M	9,200	$16.90	$155,480	9,200 Direct	—	Acquired	1194.1% (price as of 2026-08-19)
Nov. 30, 2004	BIIB	S	15,500	$59.00	$914,500	0 Direct	-100.00%	Disposed	270.7% (price as of 2026-08-19)
Nov. 30, 2004	BIIB	M	15,500	$13.04	$202,120	15,500 Direct	—	Acquired	1577.2% (price as of 2026-08-19)
May 25, 2004	BIIB	M	15,000	$13.04	$195,600	45,500 Direct	+49.18%	Acquired	1577.2% (price as of 2026-08-19)
May 25, 2004	BIIB	S	15,000	$62.50	$937,500	30,500 Direct	-32.97%	Disposed	249.9% (price as of 2026-08-19)
May 25, 2004	BIIB	M	15,000	$13.04	$195,600	30,500 Direct	+96.77%	Acquired	1577.2% (price as of 2026-08-19)
May 25, 2004	BIIB	S	15,000	$62.53	$937,950	15,500 Direct	-49.18%	Disposed	249.8% (price as of 2026-08-19)
May 25, 2004	BIIB	M	15,000	—	—	30,500 Direct	-32.97%	Disposed	(price as of 2026-08-19)
May 25, 2004	BIIB	M	15,000	—	—	15,500 Direct	-49.18%	Disposed	(price as of 2026-08-19)
May 4, 2004	BIIB	M	5,000	$13.40	$67,000	80,500 Direct	+6.62%	Acquired	1532.2% (price as of 2026-08-19)
May 4, 2004	BIIB	S	5,000	$58.66	$293,300	75,500 Direct	-6.21%	Disposed	272.8% (price as of 2026-08-19)
May 4, 2004	BIIB	M	10,000	$13.40	$134,000	75,500 Direct	+15.27%	Acquired	1532.2% (price as of 2026-08-19)
May 4, 2004	BIIB	S	10,000	$58.62	$586,200	65,500 Direct	-13.25%	Disposed	273.1% (price as of 2026-08-19)
May 4, 2004	BIIB	M	20,000	$13.40	$268,000	65,500 Direct	+43.96%	Acquired	1532.2% (price as of 2026-08-19)
May 4, 2004	BIIB	S	20,000	$58.60	$1,172,000	45,500 Direct	-30.53%	Disposed	273.2% (price as of 2026-08-19)
May 4, 2004	BIIB	M	5,000	—	—	75,500 Direct	-6.21%	Disposed	(price as of 2026-08-19)
May 4, 2004	BIIB	M	10,000	—	—	65,500 Direct	-13.25%	Disposed	(price as of 2026-08-19)
May 4, 2004	BIIB	M	20,000	—	—	45,500 Direct	-30.53%	Disposed	(price as of 2026-08-19)
Feb. 6, 2004	BIIB	A	27,000	—	—	27,000 Direct	—	Acquired	(price as of 2026-08-19)
Feb. 6, 2004	BIIB	A	9,000	—	—	9,000 Direct	—	Acquired	(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
Feb. 18, 2005	BIIB	Stock Option (right-to-buy) [F1]	Common Stock (23,000)	$45.46	Dec. 15, 2010	23,000	Disposed
Feb. 18, 2005	BIIB	Stock Option (right-to-buy) [F1]	Common Stock (57,500)	$47.15	June 10, 2009	57,500	Disposed
Feb. 18, 2005	BIIB	Stock Option (right-to-buy) [F1]	Common Stock (9,200)	$35.42	Dec. 11, 2008	9,200	Disposed
Feb. 17, 2005	BIIB	Stock Option (right-to-buy) [F1]	Common Stock (55,000)	$67.57	Feb. 17, 2015	55,000	Acquired
Nov. 30, 2004	BIIB	Stock Option (right-to-buy) [F1]	Common Stock (9,200)	$15.54	Dec. 12, 2007	9,200	Disposed
Nov. 30, 2004	BIIB	Stock Option (right-to-buy) [F1]	Common Stock (9,200)	$16.90	Dec. 6, 2006	9,200	Disposed
Nov. 30, 2004	BIIB	Stock Option (right-to-buy) [F1]	Common Stock (15,500)	$13.04	April 22, 2006	15,500	Disposed
May 25, 2004	BIIB	Stock Option (right-to-buy) [F1]	Common Stock (15,000)	$13.04	April 22, 2006	15,000	Disposed
May 25, 2004	BIIB	Stock Option (right-to-buy) [F1]	Common Stock (15,000)	$13.04	April 22, 2006	15,000	Disposed
May 4, 2004	BIIB	Employee Stock Option (right-to-buy) [F1,F2]	Common Stock (5,000)	$13.40	April 22, 2006	5,000	Disposed
May 4, 2004	BIIB	Employee Stock Option (right-to-buy) [F1]	Common Stock (10,000)	$13.40	April 22, 2006	10,000	Disposed
May 4, 2004	BIIB	Employee Stock Option (right-to-buy) [F1]	Common Stock (20,000)	$13.40	April 22, 2006	20,000	Disposed
Feb. 6, 2004	BIIB	NQ Stock Option (right to buy)	Common Stock (27,000)	$43.50	Feb. 6, 2014	27,000	Acquired

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