Eric K Rowinsky

Insider

First SEC filing: June 11, 2026 · Latest: June 11, 2026

On this page

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

Insider transactions

0 buys (P) 0 sells (S) Net: $0 + 66 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

66 other filings hidden

Date	Ticker	Code	Shares	Price	Value	Owned after	Δ own	A/D	vs now
June 9, 2026	BIIB	A	1,505	—	—	25,844 Direct	+6.18%	Acquired	(price as of 2026-08-19)
May 21, 2026	VSTM	A	36,000	—	—	52,666 Direct	+216.01%	Acquired	(price as of 2026-08-19)
June 17, 2025	BIIB	A	2,370	—	—	24,339 Direct	+10.79%	Acquired	(price as of 2026-08-19)
May 22, 2025	VSTM	A	12,500	—	—	12,500 Direct	—	Acquired	(price as of 2026-08-19)
May 22, 2025	VSTM	A	8,333	—	—	16,666 Direct	+100.00%	Acquired	(price as of 2026-08-19)
June 21, 2024	BIIB	A	1,340	—	—	21,969 Direct	+6.50%	Acquired	(price as of 2026-08-19)
June 18, 2024	VSTM	A	12,500	—	—	12,500 Direct	—	Acquired	(price as of 2026-08-19)
June 18, 2024	VSTM	A	8,333	—	—	8,333 Direct	—	Acquired	(price as of 2026-08-19)
March 11, 2024	VSTM	A	12,572	—	—	12,572 Direct	—	Acquired	(price as of 2026-08-19)
March 11, 2024	VSTM	D	2,083	—	—	0 Direct	-100.00%	Disposed	(price as of 2026-08-19)
March 11, 2024	VSTM	D	2,083	—	—	0 Direct	-100.00%	Disposed	(price as of 2026-08-19)
March 11, 2024	VSTM	D	2,083	—	—	0 Direct	-100.00%	Disposed	(price as of 2026-08-19)
March 11, 2024	VSTM	D	2,157	—	—	0 Direct	-100.00%	Disposed	(price as of 2026-08-19)
March 11, 2024	VSTM	D	4,166	—	—	0 Direct	-100.00%	Disposed	(price as of 2026-08-19)
Feb. 15, 2024	BIIB	P	455	$222.54	$101,256	20,629 Direct	+2.26%	Acquired	-1.7% (price as of 2026-08-19)
Jan. 1, 2024	FBIOP	A	6,666	—	—	68,797 Direct	+10.73%	Acquired	(price as of 2026-08-19)
June 26, 2023	BIIB	A	960	—	—	20,174 Direct	+5.00%	Acquired	(price as of 2026-08-19)
May 15, 2023	VSTM	A	62,500	—	—	62,500 Direct	—	Acquired	(price as of 2026-08-19)
Feb. 10, 2023	FBIOP	P	11,976	$0.84	$10,060	931,976 Direct	+1.30%	Acquired	2069.0% (price as of 2026-08-19)
Jan. 1, 2023	FBIOP	A	100,000	—	—	920,000 Direct	+12.20%	Acquired	(price as of 2026-08-19)
June 22, 2022	VSTM	A	62,500	—	—	62,500 Direct	—	Acquired	(price as of 2026-08-19)
June 15, 2022	BIIB	A	1,370	—	—	19,214 Direct	+7.68%	Acquired	(price as of 2026-08-19)
May 12, 2022	VSTM	A	62,500	—	—	62,500 Direct	—	Acquired	(price as of 2026-08-19)
Jan. 1, 2022	FBIOP	A	100,000	—	—	820,000 Direct	+13.89%	Acquired	(price as of 2026-08-19)
July 1, 2021	BIIB	A	775	—	—	17,844 Direct	+4.54%	Acquired	(price as of 2026-08-19)
June 28, 2021	VSTM	A	25,000	—	—	25,000 Direct	—	Acquired	(price as of 2026-08-19)
March 2, 2021	FBIOP	S	10,000	$4.45	$44,500	720,000 Direct	-1.37%	Disposed	309.4% (price as of 2026-08-19)
Feb. 19, 2021	FBIOP	S	8,000	$4.31	$34,480	730,000 Direct	-1.08%	Disposed	322.7% (price as of 2026-08-19)
Feb. 18, 2021	FBIOP	S	6,000	$4.20	$25,200	738,000 Direct	-0.81%	Disposed	333.8% (price as of 2026-08-19)
Feb. 16, 2021	FBIOP	S	2,000	$3.86	$7,720	744,000 Direct	-0.27%	Disposed	372.0% (price as of 2026-08-19)
Feb. 5, 2021	FBIOP	S	4,000	$3.80	$15,200	746,000 Direct	-0.53%	Disposed	379.5% (price as of 2026-08-19)
Jan. 1, 2021	FBIOP	A	100,000	—	—	750,000 Direct	+15.38%	Acquired	(price as of 2026-08-19)
June 16, 2020	VSTM	A	25,000	—	—	25,000 Direct	—	Acquired	(price as of 2026-08-19)
June 3, 2020	BIIB	A	890	—	—	17,069 Direct	+5.50%	Acquired	(price as of 2026-08-19)
Jan. 1, 2020	FBIOP	A	100,000	—	—	650,000 Direct	+18.18%	Acquired	(price as of 2026-08-19)
June 21, 2019	VSTM	A	25,000	—	—	25,000 Direct	—	Acquired	(price as of 2026-08-19)
June 19, 2019	BIIB	A	1,155	—	—	16,179 Direct	+7.69%	Acquired	(price as of 2026-08-19)
Jan. 1, 2019	FBIOP	A	100,000	—	—	550,000 Direct	+22.22%	Acquired	(price as of 2026-08-19)
June 12, 2018	BIIB	A	880	—	—	15,024 Direct	+6.22%	Acquired	(price as of 2026-08-19)
Jan. 1, 2018	FBIOP	A	100,000	—	—	450,000 Direct	+28.57%	Acquired	(price as of 2026-08-19)
Sept. 5, 2017	VSTM	P	2,000	$3.84	$7,680	2,000 Indirect	—	Acquired	-83.7% (price as of 2026-08-19)
June 13, 2017	VSTM	A	50,000	—	—	50,000 Direct	—	Acquired	(price as of 2026-08-19)
June 7, 2017	BIIB	A	1,055	—	—	14,144 Direct	+8.06%	Acquired	(price as of 2026-08-19)
June 8, 2016	BIIB	A	1,060	—	—	13,065 Direct	+8.83%	Acquired	(price as of 2026-08-19)
Jan. 1, 2016	FBIOP	A	100,000	—	—	250,000 Direct	+66.67%	Acquired	(price as of 2026-08-19)
June 10, 2015	BIIB	A	695	—	—	12,005 Direct	+6.15%	Acquired	(price as of 2026-08-19)
March 20, 2015	BIIB	M 10b5-1	11,667	—	—	0 Direct	-100.00%	Disposed	(price as of 2026-08-19)
March 20, 2015	BIIB	S 10b5-1	11,667	$475.00	$5,541,825	11,310 Direct	-50.78%	Disposed	-54.0% (price as of 2026-08-19)
March 20, 2015	BIIB	M 10b5-1	11,667	$59.82	$697,920	22,977 Direct	+103.16%	Acquired	265.6% (price as of 2026-08-19)
March 19, 2015	BIIB	M 10b5-1	2,333	—	—	11,667 Direct	-16.66%	Disposed	(price as of 2026-08-19)
March 19, 2015	BIIB	S 10b5-1	2,333	$436.14	$1,017,515	11,310 Direct	-17.10%	Disposed	-49.9% (price as of 2026-08-19)
March 19, 2015	BIIB	M 10b5-1	2,333	$59.82	$139,560	13,643 Direct	+20.63%	Acquired	265.6% (price as of 2026-08-19)
March 17, 2015	BIIB	M 10b5-1	4,667	—	—	14,000 Direct	-25.00%	Disposed	(price as of 2026-08-19)
March 17, 2015	BIIB	S 10b5-1	4,667	$425.45	$1,985,575	11,310 Direct	-29.21%	Disposed	-48.6% (price as of 2026-08-19)
March 17, 2015	BIIB	M 10b5-1	4,667	$59.82	$279,180	15,977 Direct	+41.26%	Acquired	265.6% (price as of 2026-08-19)
March 12, 2015	FBIOP	A	50,000	—	—	150,000 Direct	+50.00%	Acquired	(price as of 2026-08-19)
March 12, 2015	FBIOP	A	50,000	—	—	100,000 Direct	+100.00%	Acquired	(price as of 2026-08-19)
March 9, 2015	BIIB	M 10b5-1	4,666	—	—	18,667 Direct	-20.00%	Disposed	(price as of 2026-08-19)
March 9, 2015	BIIB	S 10b5-1	4,666	$417.23	$1,946,795	11,310 Direct	-29.21%	Disposed	-47.6% (price as of 2026-08-19)
March 9, 2015	BIIB	M 10b5-1	4,666	$59.82	$279,120	15,976 Direct	+41.26%	Acquired	265.6% (price as of 2026-08-19)
June 12, 2014	BIIB	A	870	—	—	11,310 Direct	+8.33%	Acquired	(price as of 2026-08-19)
Feb. 20, 2014	FBIOP	A	50,000	—	—	50,000 Direct	—	Acquired	(price as of 2026-08-19)
Jan. 21, 2014	BIIB	S 10b5-1	2,020	$310.09	$626,382	10,440 Direct	-16.21%	Disposed	-29.5% (price as of 2026-08-19)
Dec. 19, 2013	FBIOP	A	30,000	—	—	30,000 Direct	—	Acquired	(price as of 2026-08-19)
June 12, 2013	BIIB	A	1,305	—	—	12,460 Direct	+11.70%	Acquired	(price as of 2026-08-19)
June 8, 2012	BIIB	A	2,020	—	—	11,155 Direct	+22.11%	Acquired	(price as of 2026-08-19)
Feb. 10, 2012	FBIOP	A	15,000	—	—	15,000 Direct	—	Acquired	(price as of 2026-08-19)
Jan. 6, 2012	BIIB	M 10b5-1	11,667	—	—	23,333 Direct	-33.33%	Disposed	(price as of 2026-08-19)
Jan. 6, 2012	BIIB	M 10b5-1	1,325	—	—	0 Direct	-100.00%	Disposed	(price as of 2026-08-19)
Jan. 6, 2012	BIIB	S 10b5-1	11,667	$116.00	$1,353,372	9,135 Direct	-56.09%	Disposed	88.5% (price as of 2026-08-19)
Jan. 6, 2012	BIIB	M 10b5-1	11,667	$59.82	$697,920	20,802 Direct	+127.72%	Acquired	265.6% (price as of 2026-08-19)
Jan. 6, 2012	BIIB	S 10b5-1	1,325	$116.00	$153,700	9,135 Direct	-12.67%	Disposed	88.5% (price as of 2026-08-19)
Jan. 6, 2012	BIIB	M 10b5-1	1,325	$59.82	$79,262	10,460 Direct	+14.50%	Acquired	265.6% (price as of 2026-08-19)
June 1, 2011	BIIB	A	2,900	—	—	9,135 Direct	+46.51%	Acquired	(price as of 2026-08-19)
June 30, 2010	SVRA	A	4,000	—	—	4,000 Direct	—	Acquired	(price as of 2026-08-19)
June 9, 2010	BIIB	A	5,735	—	—	6,235 Direct	+1147.00%	Acquired	(price as of 2026-08-19)
March 22, 2010	BIIB	A	35,000	—	—	35,000 Direct	—	Acquired	(price as of 2026-08-19)
March 22, 2010	BIIB	A	1,325	—	—	1,325 Direct	—	Acquired	(price as of 2026-08-19)
March 22, 2010	BIIB	A	500	—	—	500 Direct	—	Acquired	(price as of 2026-08-19)
Feb. 2, 2010	SVRA	A	100,000	—	—	100,000 Direct	—	Acquired	(price as of 2026-08-19)
Feb. 2, 2010	SVRA	A	100,000	—	—	100,000 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
May 22, 2025	VSTM	Stock Option (right to buy)	Common Stock (12,500)	$7.48	May 22, 2035	12,500	Acquired
June 18, 2024	VSTM	Stock Option (right to buy)	Common Stock (12,500)	$3.27	June 18, 2034	12,500	Acquired
March 11, 2024	VSTM	Stock Option (right to buy)	Common Stock (12,572)	$11.44	March 11, 2034	12,572	Acquired
March 11, 2024	VSTM	Stock Option (right to buy)	Common Stock (2,083)	$49.92	June 28, 2031	2,083	Disposed
March 11, 2024	VSTM	Stock Option (right to buy)	Common Stock (2,083)	$21.24	June 16, 2030	2,083	Disposed
March 11, 2024	VSTM	Stock Option (right to buy)	Common Stock (2,083)	$21.72	June 21, 2029	2,083	Disposed
March 11, 2024	VSTM	Stock Option (right to buy)	Common Stock (2,157)	$67.08	June 11, 2028	2,157	Disposed
March 11, 2024	VSTM	Stock Option (right to buy)	Common Stock (4,166)	$25.08	June 13, 2027	4,166	Disposed
May 15, 2023	VSTM	Stock Option (right to buy)	Common Stock (62,500)	$0.42	May 15, 2033	62,500	Acquired
June 22, 2022	VSTM	Stock Option (right to buy)	Common Stock (62,500)	$1.11	June 22, 2032	62,500	Acquired
May 12, 2022	VSTM	Stock Option (right to buy) [F1]	Common Stock (62,500)	$1.07	May 12, 2032	62,500	Acquired
June 28, 2021	VSTM	Stock Option (right to buy)	Common Stock (25,000)	$4.16	June 28, 2031	25,000	Acquired
June 16, 2020	VSTM	Stock Option (Right to Buy)	Common Stock (25,000)	$1.77	June 16, 2030	25,000	Acquired
June 21, 2019	VSTM	Stock Option (Right to Buy)	Common Stock (25,000)	$1.81	June 21, 2029	25,000	Acquired
June 13, 2017	VSTM	Stock Option (Right to Buy)	Common Stock (50,000)	$2.09	June 13, 2027	50,000	Acquired
March 20, 2015	BIIB	Stock Option (Right to Buy)	Common Stock (11,667)	$59.82	March 22, 2020	11,667	Disposed
March 19, 2015	BIIB	Stock Option (Right to Buy)	Common Stock (2,333)	$59.82	March 22, 2020	2,333	Disposed
March 17, 2015	BIIB	Stock Option (Right to Buy)	Common Stock (4,667)	$59.82	March 22, 2020	4,667	Disposed
March 9, 2015	BIIB	Stock Option (Right to Buy)	Common Stock (4,666)	$59.82	March 22, 2020	4,666	Disposed
Dec. 19, 2013	FBIOP	Options to purchase Common Stock	Common Stock (30,000)	$2.10	Dec. 19, 2023	30,000	Acquired
Feb. 10, 2012	FBIOP	Options to purchase Common Stock	Common Stock (15,000)	$6.25	Feb. 10, 2022	15,000	Acquired
Jan. 6, 2012	BIIB	Stock Option (Right to Buy)	Common Stock (11,667)	$59.82	March 22, 2020	11,667	Disposed
Jan. 6, 2012	BIIB	Stock Option (Right to Buy)	Common Stock (1,325)	$59.82	March 22, 2020	1,325	Disposed
June 30, 2010	SVRA	Stock Option (Right to Buy)	Common Stock (4,000)	$1.63	June 30, 2020	4,000	Acquired
March 22, 2010	BIIB	Stock Option (Right to Buy)	Common Stock (35,000)	$59.82	March 22, 2020	35,000	Acquired
March 22, 2010	BIIB	Stock Option (Right to Buy)	Common Stock (1,325)	$59.82	March 22, 2020	1,325	Acquired
Feb. 2, 2010	SVRA	Non-qualified Stock Option (Right to Buy)	Commmon Stock (100,000)	$0.32	Feb. 2, 2020	100,000	Acquired
Feb. 2, 2010	SVRA	Non-qualified Stock Option (Right to Buy)	Common Stock (100,000)	$0.32	Feb. 2, 2020	100,000	Acquired

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

Initial ownership (Form 3) 2 holdings

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

Date	Ticker	Security	Shares	Ownership
Sept. 13, 2011	FBIOP	Options to purchase Common Stock→ Common Stock (193,490)	193,490	Direct
March 24, 2010	BIIB	Common Stock	0	Direct