Thomas F Keller

Insider

First SEC filing: Nov. 14, 2003 · Latest: Nov. 14, 2003

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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.
Initial holdings The stakes this person held when they first started reporting.

Insider at

BIIB selling Oct. 15, 2007

Insider transactions

0 buys (P) 0 sells (S) Net: $0 + 35 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

35 other filings hidden

Date	Ticker	Code	Shares	Price	Value	Owned after	Δ own	A/D	vs now
Oct. 15, 2007	BIIB	S 10b5-1	10,350	$82.00	$848,700	1,250 Indirect	-89.22%	Disposed	168.3% (price as of 2026-08-20)
Oct. 15, 2007	BIIB	M 10b5-1	10,350	—	—	13,800 Indirect	-42.86%	Disposed	(price as of 2026-08-20)
Oct. 15, 2007	BIIB	S 10b5-1	10,350	$82.00	$848,700	2,170 Indirect	-82.67%	Disposed	168.3% (price as of 2026-08-20)
Oct. 15, 2007	BIIB	M 10b5-1	10,350	$26.80	$277,380	12,520 Indirect	+476.96%	Acquired	720.9% (price as of 2026-08-20)
Aug. 24, 2007	BIIB	M 10b5-1	6,900	—	—	24,150 Indirect	-22.22%	Disposed	(price as of 2026-08-20)
Aug. 24, 2007	BIIB	S 10b5-1	6,900	$62.00	$427,800	2,170 Indirect	-76.07%	Disposed	254.8% (price as of 2026-08-20)
Aug. 24, 2007	BIIB	M 10b5-1	6,900	$26.80	$184,920	9,070 Indirect	+317.97%	Acquired	720.9% (price as of 2026-08-20)
May 31, 2007	BIIB	A	5,950	—	—	5,950 Direct	—	Acquired	(price as of 2026-08-20)
May 31, 2007	BIIB	A	2,300	—	—	3,550 Direct	+184.00%	Acquired	(price as of 2026-08-20)
May 25, 2007	BIIB	M	1,250	—	—	0 Direct	-100.00%	Disposed	(price as of 2026-08-20)
May 25, 2007	BIIB	M	1,250	—	—	1,250 Direct	—	Acquired	(price as of 2026-08-20)
Nov. 1, 2006	BIIB	M	3,450	—	—	31,050 Direct	-10.00%	Disposed	(price as of 2026-08-20)
Nov. 1, 2006	BIIB	S 10b5-1	3,450	$48.00	$165,600	0 Direct	-100.00%	Disposed	358.3% (price as of 2026-08-20)
Nov. 1, 2006	BIIB	M 10b5-1	3,450	$26.80	$92,460	3,450 Direct	—	Acquired	720.9% (price as of 2026-08-20)
Sept. 1, 2006	BIIB	M	6,900	—	—	0 Indirect	-100.00%	Disposed	(price as of 2026-08-20)
Sept. 1, 2006	BIIB	S 10b5-1	6,900	$44.60	$307,740	0 Indirect	-100.00%	Disposed	393.3% (price as of 2026-08-20)
Sept. 1, 2006	BIIB	M 10b5-1	6,900	$15.16	$104,604	6,900 Indirect	—	Acquired	1351.1% (price as of 2026-08-20)
May 25, 2006	BIIB	A	3,125	—	—	3,125 Direct	—	Acquired	(price as of 2026-08-20)
May 25, 2006	BIIB	A	1,250	—	—	1,250 Direct	—	Acquired	(price as of 2026-08-20)
March 31, 2006	BIIB	M	10,350	—	—	6,900 Indirect	-60.00%	Disposed	(price as of 2026-08-20)
March 31, 2006	BIIB	S 10b5-1	10,350	$46.95	$485,932	6,900 Indirect	-60.00%	Disposed	368.6% (price as of 2026-08-20)
March 31, 2006	BIIB	M 10b5-1	10,350	$15.16	$156,906	17,250 Indirect	+150.00%	Acquired	1351.1% (price as of 2026-08-20)
Jan. 9, 2006	BIIB	A	12,500	—	—	12,500 Direct	—	Acquired	(price as of 2026-08-20)
Oct. 1, 2005	BIIB	M	10,350	—	—	17,250 Indirect	-37.50%	Disposed	(price as of 2026-08-20)
Oct. 1, 2005	BIIB	S 10b5-1	100	$39.03	$3,903	20,550 Indirect	-0.48%	Disposed	463.6% (price as of 2026-08-20)
Oct. 1, 2005	BIIB	S 10b5-1	300	$39.04	$11,712	20,650 Indirect	-1.43%	Disposed	463.5% (price as of 2026-08-20)
Oct. 1, 2005	BIIB	S 10b5-1	500	$39.05	$19,525	20,950 Indirect	-2.33%	Disposed	463.4% (price as of 2026-08-20)
Oct. 1, 2005	BIIB	S 10b5-1	200	$39.07	$7,814	21,450 Indirect	-0.92%	Disposed	463.1% (price as of 2026-08-20)
Oct. 1, 2005	BIIB	S 10b5-1	100	$39.09	$3,909	21,650 Indirect	-0.46%	Disposed	462.8% (price as of 2026-08-20)
Oct. 1, 2005	BIIB	S 10b5-1	100	$39.10	$3,910	21,750 Indirect	-0.46%	Disposed	462.6% (price as of 2026-08-20)
Oct. 1, 2005	BIIB	S 10b5-1	100	$39.13	$3,913	21,850 Indirect	-0.46%	Disposed	462.2% (price as of 2026-08-20)
Oct. 1, 2005	BIIB	S 10b5-1	200	$39.15	$7,830	21,950 Indirect	-0.90%	Disposed	461.9% (price as of 2026-08-20)
Oct. 1, 2005	BIIB	S 10b5-1	100	$39.21	$3,921	22,150 Indirect	-0.45%	Disposed	461.1% (price as of 2026-08-20)
Oct. 1, 2005	BIIB	S 10b5-1	200	$39.24	$7,848	22,250 Indirect	-0.89%	Disposed	460.6% (price as of 2026-08-20)
Oct. 1, 2005	BIIB	S 10b5-1	100	$39.27	$3,927	22,450 Indirect	-0.44%	Disposed	460.2% (price as of 2026-08-20)
Oct. 1, 2005	BIIB	S 10b5-1	400	$39.28	$15,712	22,550 Indirect	-1.74%	Disposed	460.1% (price as of 2026-08-20)
Oct. 1, 2005	BIIB	S 10b5-1	300	$39.29	$11,787	22,950 Indirect	-1.29%	Disposed	459.9% (price as of 2026-08-20)
Oct. 1, 2005	BIIB	S 10b5-1	300	$39.30	$11,790	23,250 Indirect	-1.27%	Disposed	459.8% (price as of 2026-08-20)
Oct. 1, 2005	BIIB	S 10b5-1	500	$39.31	$19,655	23,550 Indirect	-2.08%	Disposed	459.6% (price as of 2026-08-20)
Oct. 1, 2005	BIIB	S 10b5-1	900	$39.32	$35,388	24,050 Indirect	-3.61%	Disposed	459.5% (price as of 2026-08-20)
Oct. 1, 2005	BIIB	S 10b5-1	150	$39.33	$5,900	24,950 Indirect	-0.60%	Disposed	459.3% (price as of 2026-08-20)
Oct. 1, 2005	BIIB	S 10b5-1	300	$39.33	$11,799	25,100 Indirect	-1.18%	Disposed	459.3% (price as of 2026-08-20)
Oct. 1, 2005	BIIB	S 10b5-1	300	$39.38	$11,814	25,400 Indirect	-1.17%	Disposed	458.6% (price as of 2026-08-20)
Oct. 1, 2005	BIIB	S 10b5-1	500	$39.39	$19,695	25,700 Indirect	-1.91%	Disposed	458.5% (price as of 2026-08-20)
Oct. 1, 2005	BIIB	S 10b5-1	200	$39.40	$7,880	26,200 Indirect	-0.76%	Disposed	458.4% (price as of 2026-08-20)
Oct. 1, 2005	BIIB	S 10b5-1	500	$39.43	$19,715	26,400 Indirect	-1.86%	Disposed	457.9% (price as of 2026-08-20)
Oct. 1, 2005	BIIB	S 10b5-1	200	$39.45	$7,890	26,900 Indirect	-0.74%	Disposed	457.6% (price as of 2026-08-20)
Oct. 1, 2005	BIIB	S 10b5-1	100	$39.47	$3,947	27,100 Indirect	-0.37%	Disposed	457.4% (price as of 2026-08-20)
Oct. 1, 2005	BIIB	S 10b5-1	100	$39.48	$3,948	27,200 Indirect	-0.37%	Disposed	457.2% (price as of 2026-08-20)
Oct. 1, 2005	BIIB	S 10b5-1	100	$39.50	$3,950	27,300 Indirect	-0.36%	Disposed	456.9% (price as of 2026-08-20)
Oct. 1, 2005	BIIB	S 10b5-1	100	$39.55	$3,955	27,400 Indirect	-0.36%	Disposed	456.2% (price as of 2026-08-20)
Oct. 1, 2005	BIIB	S 10b5-1	100	$39.56	$3,956	27,500 Indirect	-0.36%	Disposed	456.1% (price as of 2026-08-20)
Oct. 1, 2005	BIIB	M	10,350	$15.16	$156,906	27,600 Indirect	+60.00%	Acquired	1351.1% (price as of 2026-08-20)
Oct. 1, 2005	BIIB	M	10,350	—	—	17,250 Indirect	-37.50%	Disposed	(price as of 2026-08-20)
Oct. 1, 2005	BIIB	S 10b5-1	300	$38.65	$11,595	17,250 Indirect	-1.71%	Disposed	469.2% (price as of 2026-08-20)
Oct. 1, 2005	BIIB	S 10b5-1	100	$38.66	$3,866	17,550 Indirect	-0.57%	Disposed	469.0% (price as of 2026-08-20)
Oct. 1, 2005	BIIB	S 10b5-1	200	$38.69	$7,738	17,650 Indirect	-1.12%	Disposed	468.6% (price as of 2026-08-20)
Oct. 1, 2005	BIIB	S 10b5-1	300	$38.70	$11,610	17,850 Indirect	-1.65%	Disposed	468.4% (price as of 2026-08-20)
Oct. 1, 2005	BIIB	S 10b5-1	200	$38.73	$7,746	18,150 Indirect	-1.09%	Disposed	468.0% (price as of 2026-08-20)
Oct. 1, 2005	BIIB	S 10b5-1	600	$38.75	$23,250	18,350 Indirect	-3.17%	Disposed	467.7% (price as of 2026-08-20)
Oct. 1, 2005	BIIB	S 10b5-1	200	$38.79	$7,758	18,950 Indirect	-1.04%	Disposed	467.1% (price as of 2026-08-20)
Oct. 1, 2005	BIIB	S 10b5-1	200	$38.81	$7,762	19,150 Indirect	-1.03%	Disposed	466.8% (price as of 2026-08-20)
Oct. 1, 2005	BIIB	S 10b5-1	200	$38.82	$7,764	19,350 Indirect	-1.02%	Disposed	466.7% (price as of 2026-08-20)
Oct. 1, 2005	BIIB	S 10b5-1	100	$38.83	$3,883	19,550 Indirect	-0.51%	Disposed	466.5% (price as of 2026-08-20)
Oct. 1, 2005	BIIB	S 10b5-1	200	$38.84	$7,768	19,650 Indirect	-1.01%	Disposed	466.4% (price as of 2026-08-20)
Oct. 1, 2005	BIIB	S 10b5-1	200	$38.86	$7,772	19,850 Indirect	-1.00%	Disposed	466.1% (price as of 2026-08-20)
Oct. 1, 2005	BIIB	S 10b5-1	100	$38.87	$3,887	20,050 Indirect	-0.50%	Disposed	466.0% (price as of 2026-08-20)
Oct. 1, 2005	BIIB	S 10b5-1	100	$38.94	$3,894	20,150 Indirect	-0.49%	Disposed	464.9% (price as of 2026-08-20)
Oct. 1, 2005	BIIB	S 10b5-1	200	$39.00	$7,800	20,250 Indirect	-0.98%	Disposed	464.1% (price as of 2026-08-20)
Oct. 1, 2005	BIIB	S 10b5-1	100	$39.02	$3,902	20,450 Indirect	-0.49%	Disposed	463.8% (price as of 2026-08-20)
Oct. 1, 2005	BIIB	M	10,350	$15.16	$156,906	27,600 Indirect	+60.00%	Acquired	1351.1% (price as of 2026-08-20)
Jan. 3, 2005	BIIB	A	12,500	—	—	12,500 Direct	—	Acquired	(price as of 2026-08-20)
Oct. 1, 2004	BIIB	S 10b5-1	10,350	$61.00	$631,350	920 Indirect	-91.84%	Disposed	260.6% (price as of 2026-08-20)
Oct. 1, 2004	BIIB	M	10,350	$15.16	$156,906	11,270 Indirect	+1125.00%	Acquired	1351.1% (price as of 2026-08-20)
Oct. 1, 2004	BIIB	M	10,350	—	—	27,600 Indirect	-27.27%	Disposed	(price as of 2026-08-20)
Oct. 1, 2004	BIIB	S 10b5-1	10,350	$61.00	$631,350	27,600 Indirect	-27.27%	Disposed	260.6% (price as of 2026-08-20)
Oct. 1, 2004	BIIB	M	10,350	$15.16	$156,906	37,950 Indirect	+37.50%	Acquired	1351.1% (price as of 2026-08-20)
April 1, 2004	BIIB	M	10,350	$15.16	$156,906	11,270 Indirect	+1125.00%	Acquired	1351.1% (price as of 2026-08-20)
April 1, 2004	BIIB	S 10b5-1	10,350	$55.53	$574,736	920 Indirect	-91.84%	Disposed	296.2% (price as of 2026-08-20)
April 1, 2004	BIIB	M	10,350	—	—	37,950 Indirect	-21.43%	Disposed	(price as of 2026-08-20)
Feb. 18, 2004	BIIB	M	10,350	—	—	48,300 Indirect	-17.65%	Disposed	(price as of 2026-08-20)
Feb. 18, 2004	BIIB	S	10,350	$51.80	$536,130	920 Indirect	-91.84%	Disposed	324.7% (price as of 2026-08-20)
Feb. 18, 2004	BIIB	M	10,350	$15.16	$156,906	11,270 Indirect	+1125.00%	Acquired	1351.1% (price as of 2026-08-20)
Jan. 2, 2004	BIIB	A	12,500	—	—	— Direct	—	Acquired	(price as of 2026-08-20)
Nov. 12, 2003	BIIB	A	58,650	—	—	58,650 Indirect	—	—	(price as of 2026-08-20)
Nov. 12, 2003	BIIB	A	11,500	—	—	11,500 Direct	—	Acquired	(price as of 2026-08-20)
Nov. 12, 2003	BIIB	A	34,500	—	—	34,500 Direct	—	Acquired	(price as of 2026-08-20)
Nov. 12, 2003	BIIB	A	34,500	—	—	34,500 Direct	—	Acquired	(price as of 2026-08-20)
Nov. 12, 2003	BIIB	A	920	—	—	920 Indirect	—	Acquired	(price as of 2026-08-20)

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
Oct. 15, 2007	BIIB	Stock Option (right to buy)	Common Stock (10,350)	$26.80	Sept. 20, 2012	10,350	Disposed
Aug. 24, 2007	BIIB	Stock option (right to buy)	Common Stock (6,900)	$26.80	Sept. 20, 2012	6,900	Disposed
May 31, 2007	BIIB	Stock Option (right to buy)	Common Stock (5,950)	$52.22	May 30, 2017	5,950	Acquired
May 25, 2007	BIIB	Restricted Stock Unit	Common Stock (1,250)	—	May 25, 2007	1,250	Disposed
Nov. 1, 2006	BIIB	Stock Option (right to buy)	Common Stock (3,450)	$26.80	Sept. 20, 2012	3,450	Disposed
Sept. 1, 2006	BIIB	Stock Option (right-to-buy)	Common Stock (6,900)	$15.16	Sept. 20, 2006	6,900	Disposed
May 25, 2006	BIIB	Employee Stock Option (right-to-buy) [F1]	Common Stock (3,125)	$46.99	May 24, 2016	3,125	Acquired
May 25, 2006	BIIB	Restricted Stock Units	Common Stock (1,250)	—	—	1,250	Acquired
March 31, 2006	BIIB	Stock Option (right-to-buy) [F4]	Common Stock (10,350)	$15.16	Sept. 20, 2006	10,350	Disposed
Jan. 9, 2006	BIIB	Stock Option (right-to-buy) [F1]	Common Stock (12,500)	$47.55	Jan. 9, 2016	12,500	Acquired
Oct. 1, 2005	BIIB	Stock Option (right-to-buy) [F4]	Common Stock (10,350)	$15.16	Sept. 20, 2006	10,350	Disposed
Oct. 1, 2005	BIIB	Stock Option (right-to-buy) [F4]	Common Stock (10,350)	$15.16	Sept. 20, 2006	10,350	Disposed
Jan. 3, 2005	BIIB	Stock Option (right-to-buy) [F1]	Common Stock (12,500)	$66.29	Jan. 3, 2015	12,500	Acquired
Oct. 1, 2004	BIIB	Stock Option (right-to-buy) [F4]	Common Stock (10,350)	$15.16	Sept. 20, 2006	10,350	Disposed
April 1, 2004	BIIB	Non-Qualified Stock Option (right to buy) [F4]	Common Stock (10,350)	$15.16	Sept. 20, 2006	10,350	Disposed
Feb. 18, 2004	BIIB	Non-Qualified Stock Options (right to buy)	Common Stock (10,350)	$15.16	Sept. 20, 2006	10,350	Disposed
Jan. 2, 2004	BIIB	[F1]	Common Stock (12,500)	$36.94	Jan. 1, 2014	12,500	Acquired
Nov. 12, 2003	BIIB	1985 NQ Stock Option	Common Stock (58,650)	$15.16	Sept. 20, 2006	58,650	—
Nov. 12, 2003	BIIB	1985 NQ Stock Option	Common Stock (11,500)	$37.08	Sept. 20, 2013	11,500	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 (34,500)	$76.39	Sept. 20, 2009	34,500	Acquired

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

Initial ownership (Form 3) 1 holding

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

Date	Ticker	Security	Shares	Ownership
Nov. 14, 2003	BIIB	No Securities Beneficially owned.	0	Direct