Stuart A Kingsley

Insider

First SEC filing: Jan. 7, 2026 · Latest: Jan. 7, 2026

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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.
Compensation Executive pay disclosed in company proxy statements.

Insider at

Insider transactions

1 buys (P) 0 sells (S) Net: $29,948 + 55 non-open-market transactions below Avg return of open purchases vs now: 21.0% 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

55 other filings hidden

Date	Ticker	Code	Shares	Price	Value	Owned after	Δ own	A/D	vs now
May 13, 2026	INDV	A	6,518	—	—	12,100 Direct	+116.77%	Acquired	(price as of 2026-08-20)
March 6, 2026	INDV	P	940	$31.86	$29,948	5,582 Direct	+20.25%	Acquired	21.0% (price as of 2026-08-20)
Jan. 26, 2026	INDV	A	3,722	—	—	4,642 Direct	+404.57%	Acquired	(price as of 2026-08-20)
Feb. 1, 2021	SRRK	A	140,000	—	—	590,000 Direct	+31.11%	Acquired	(price as of 2026-08-20)
Feb. 1, 2021	SRRK	A	42,000	—	—	42,000 Direct	—	Acquired	(price as of 2026-08-20)
July 16, 2020	SRRK	A	429,684	—	—	429,684 Direct	—	Acquired	(price as of 2026-08-20)
May 20, 2020	SRRK	A	20,316	—	—	20,316 Direct	—	Acquired	(price as of 2026-08-20)
June 8, 2018	TARA	A	12,700	—	—	12,700 Direct	—	Acquired	(price as of 2026-08-20)
June 20, 2017	TARA	A	6,666	—	—	6,666 Direct	—	Acquired	(price as of 2026-08-20)
June 9, 2016	TARA	A	6,666	—	—	6,666 Direct	—	Acquired	(price as of 2026-08-20)
Oct. 16, 2015	TARA	A	13,333	—	—	13,333 Direct	—	Acquired	(price as of 2026-08-20)
Feb. 23, 2015	BIIB	A	6,220	—	—	6,220 Direct	—	Acquired	(price as of 2026-08-20)
Feb. 12, 2015	BIIB	J	867	—	—	4,448 Direct	-16.31%	Disposed	(price as of 2026-08-20)
Feb. 12, 2015	BIIB	M	1,355	—	—	5,315 Direct	-20.31%	Disposed	(price as of 2026-08-20)
Feb. 12, 2015	BIIB	M	2,246	—	—	4,495 Direct	-33.32%	Disposed	(price as of 2026-08-20)
Feb. 12, 2015	BIIB	F	639	$392.11	$250,558	8,132 Direct	-7.29%	Disposed	-43.9% (price as of 2026-08-20)
Feb. 12, 2015	BIIB	M	1,355	—	—	8,771 Direct	+18.27%	Acquired	(price as of 2026-08-20)
Feb. 12, 2015	BIIB	F	1,058	$392.11	$414,852	7,416 Direct	-12.49%	Disposed	-43.9% (price as of 2026-08-20)
Feb. 12, 2015	BIIB	M	2,246	—	—	8,474 Direct	+36.06%	Acquired	(price as of 2026-08-20)
Feb. 9, 2015	BIIB	M	1,824	—	—	0 Direct	-100.00%	Disposed	(price as of 2026-08-20)
Feb. 9, 2015	BIIB	F	860	$396.88	$341,317	6,228 Direct	-12.13%	Disposed	-44.6% (price as of 2026-08-20)
Feb. 9, 2015	BIIB	M	1,824	—	—	7,088 Direct	+34.65%	Acquired	(price as of 2026-08-20)
Feb. 8, 2015	BIIB	M	2,636	—	—	2,639 Direct	-49.97%	Disposed	(price as of 2026-08-20)
Feb. 8, 2015	BIIB	F	883	$402.00	$354,966	5,264 Direct	-14.36%	Disposed	-45.3% (price as of 2026-08-20)
Feb. 8, 2015	BIIB	M	2,636	—	—	6,147 Direct	+75.08%	Acquired	(price as of 2026-08-20)
March 11, 2014	BIIB	S 10b5-1	1,187	$336.78	$399,758	3,511 Direct	-25.27%	Disposed	-34.7% (price as of 2026-08-20)
March 11, 2014	BIIB	S 10b5-1	1,393	$336.30	$468,466	4,698 Direct	-22.87%	Disposed	-34.6% (price as of 2026-08-20)
March 11, 2014	BIIB	S 10b5-1	963	$337.21	$324,733	6,091 Direct	-13.65%	Disposed	-34.8% (price as of 2026-08-20)
March 11, 2014	BIIB	S 10b5-1	2,000	$337.74	$675,480	7,054 Direct	-22.09%	Disposed	-34.9% (price as of 2026-08-20)
March 11, 2014	BIIB	S 10b5-1	2,885	$336.34	$970,341	9,054 Direct	-24.16%	Disposed	-34.6% (price as of 2026-08-20)
Feb. 12, 2014	BIIB	A	6,670	—	—	6,670 Direct	—	Acquired	(price as of 2026-08-20)
Feb. 12, 2014	BIIB	M	2,246	—	—	6,741 Direct	-24.99%	Disposed	(price as of 2026-08-20)
Feb. 12, 2014	BIIB	F	1,059	$323.04	$342,099	11,939 Direct	-8.15%	Disposed	-31.9% (price as of 2026-08-20)
Feb. 12, 2014	BIIB	M	2,246	—	—	12,998 Direct	+20.89%	Acquired	(price as of 2026-08-20)
Feb. 9, 2014	BIIB	M	1,824	—	—	1,824 Direct	-50.00%	Disposed	(price as of 2026-08-20)
Feb. 9, 2014	BIIB	F	861	$315.54	$271,680	10,752 Direct	-7.41%	Disposed	-30.3% (price as of 2026-08-20)
Feb. 9, 2014	BIIB	M	1,824	—	—	11,613 Direct	+18.63%	Acquired	(price as of 2026-08-20)
Feb. 8, 2014	BIIB	M	2,636	—	—	5,275 Direct	-33.32%	Disposed	(price as of 2026-08-20)
Feb. 8, 2014	BIIB	F	1,243	$315.54	$392,216	9,789 Direct	-11.27%	Disposed	-30.3% (price as of 2026-08-20)
Feb. 8, 2014	BIIB	M	2,636	—	—	11,032 Direct	+31.40%	Acquired	(price as of 2026-08-20)
Feb. 1, 2014	BIIB	M	4,586	—	—	10,097 Direct	+83.22%	Acquired	(price as of 2026-08-20)
Feb. 1, 2014	BIIB	M	4,586	—	—	0 Direct	-100.00%	Disposed	(price as of 2026-08-20)
Feb. 1, 2014	BIIB	F	1,701	$312.64	$531,801	8,396 Direct	-16.85%	Disposed	-29.6% (price as of 2026-08-20)
Feb. 12, 2013	BIIB	A	8,987	—	—	8,987 Direct	—	Acquired	(price as of 2026-08-20)
Feb. 9, 2013	BIIB	M	1,824	—	—	3,648 Direct	-33.33%	Disposed	(price as of 2026-08-20)
Feb. 9, 2013	BIIB	F	861	$164.44	$141,583	5,511 Direct	-13.51%	Disposed	33.8% (price as of 2026-08-20)
Feb. 9, 2013	BIIB	M	1,824	—	—	6,372 Direct	+40.11%	Acquired	(price as of 2026-08-20)
Feb. 8, 2013	BIIB	J	352	—	—	7,911 Direct	-4.26%	Disposed	(price as of 2026-08-20)
Feb. 8, 2013	BIIB	M	2,284	—	—	8,263 Direct	-21.66%	Disposed	(price as of 2026-08-20)
Feb. 8, 2013	BIIB	F	831	$164.44	$136,650	4,548 Direct	-15.45%	Disposed	33.8% (price as of 2026-08-20)
Feb. 8, 2013	BIIB	M	2,284	—	—	5,379 Direct	+73.80%	Acquired	(price as of 2026-08-20)
Feb. 1, 2013	BIIB	M	4,586	—	—	4,586 Direct	-50.00%	Disposed	(price as of 2026-08-20)
Feb. 1, 2013	BIIB	F	1,491	$157.30	$234,534	3,095 Direct	-32.51%	Disposed	39.9% (price as of 2026-08-20)
Feb. 1, 2013	BIIB	M	4,586	—	—	4,586 Direct	—	Acquired	(price as of 2026-08-20)
Feb. 14, 2012	BIIB	S 10b5-1	1,247	$118.61	$147,907	0 Direct	-100.00%	Disposed	85.5% (price as of 2026-08-20)
Feb. 9, 2012	BIIB	M	1,826	—	—	5,472 Direct	-25.02%	Disposed	(price as of 2026-08-20)
Feb. 9, 2012	BIIB	F	579	$117.78	$68,195	1,247 Direct	-31.71%	Disposed	86.8% (price as of 2026-08-20)
Feb. 9, 2012	BIIB	M	1,826	—	—	1,826 Direct	—	Acquired	(price as of 2026-08-20)
Feb. 8, 2012	BIIB	A	10,547	—	—	10,547 Direct	—	Acquired	(price as of 2026-08-20)
Feb. 6, 2012	BIIB	S 10b5-1	3,110	$121.03	$376,403	0 Direct	-100.00%	Disposed	81.8% (price as of 2026-08-20)
Feb. 1, 2012	BIIB	M	4,587	—	—	9,172 Direct	-33.34%	Disposed	(price as of 2026-08-20)
Feb. 1, 2012	BIIB	F	1,477	$121.26	$179,101	3,110 Direct	-32.20%	Disposed	81.4% (price as of 2026-08-20)
Feb. 1, 2012	BIIB	M	4,587	—	—	4,587 Direct	—	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
Feb. 1, 2021	SRRK	Stock Option (Right to Buy)	Common Stock (140,000)	$58.93	Feb. 1, 2031	140,000	Acquired
July 16, 2020	SRRK	Stock Option (Right to Buy)	Common Stock (429,684)	$13.83	July 16, 2030	429,684	Acquired
May 20, 2020	SRRK	Stock Option (right to buy)	Common Stock (20,316)	$19.68	May 20, 2030	20,316	Acquired
June 8, 2018	TARA	Stock Option (Right to Buy)	Common Stock (12,700)	$2.50	June 7, 2028	12,700	Acquired
June 20, 2017	TARA	Stock Option (Right to Buy)	Common Stock, $0.001 par value (6,666)	$1.30	June 19, 2027	6,666	Acquired
June 9, 2016	TARA	Stock Option (Right to Buy)	Common Stock, $0.001 par value (6,666)	$5.90	June 8, 2026	6,666	Acquired
Oct. 16, 2015	TARA	Stock Option (Right to Buy)	Common Stock, $0.001 par value (13,333)	$15.21	Oct. 16, 2025	13,333	Acquired
Feb. 23, 2015	BIIB	Restricted Stock Unit	Common Stock (6,220)	$0.00	Feb. 23, 2018	6,220	Acquired
Feb. 12, 2015	BIIB	Restricted Stock Unit	Common Stock (867)	$0.00	Feb. 12, 2017	867	Disposed
Feb. 12, 2015	BIIB	Restricted Stock Unit	Common Stock (1,355)	$0.00	Feb. 12, 2017	1,355	Disposed
Feb. 12, 2015	BIIB	Restricted Stock Unit	Common Stock (2,246)	$0.00	Feb. 12, 2017	2,246	Disposed
Feb. 9, 2015	BIIB	Restricted Stock Unit	Common Stock (1,824)	$0.00	Feb. 9, 2015	1,824	Disposed
Feb. 8, 2015	BIIB	Restricted Stock Unit	Common Stock (2,636)	$0.00	Feb. 8, 2016	2,636	Disposed
Feb. 12, 2014	BIIB	Restricted Stock Unit	Common Stock (6,670)	$0.00	Feb. 12, 2017	6,670	Acquired
Feb. 12, 2014	BIIB	Restricted Stock Unit	Common Stock (2,246)	$0.00	Feb. 12, 2017	2,246	Disposed
Feb. 9, 2014	BIIB	Restricted Stock Unit	Common Stock (1,824)	$0.00	Feb. 9, 2015	1,824	Disposed
Feb. 8, 2014	BIIB	Restricted Stock Unit	Common Stock (2,636)	$0.00	Feb. 8, 2016	2,636	Disposed
Feb. 1, 2014	BIIB	Restricted Stock Unit	Common Stock (4,586)	$0.00	Feb. 23, 2014	4,586	Disposed
Feb. 12, 2013	BIIB	Restricted Stock Unit	Common Stock (8,987)	$0.00	Feb. 12, 2017	8,987	Acquired
Feb. 9, 2013	BIIB	Restricted Stock Unit	Common Stock (1,824)	$0.00	Feb. 9, 2015	1,824	Disposed
Feb. 8, 2013	BIIB	Restricted Stock Unit	Common Stock (352)	$0.00	Feb. 8, 2016	352	Disposed
Feb. 8, 2013	BIIB	Restricted Stock Unit	Common Stock (2,284)	$0.00	Feb. 8, 2016	2,284	Disposed
Feb. 1, 2013	BIIB	Restricted Stock Unit	Common Stock (4,586)	$0.00	Feb. 23, 2014	4,586	Disposed
Feb. 9, 2012	BIIB	Restricted Stock Unit	Common Stock (1,826)	$0.00	Feb. 9, 2015	1,826	Disposed
Feb. 8, 2012	BIIB	Restricted Stock Unit	Common Stock (10,547)	$0.00	Feb. 8, 2016	10,547	Acquired
Feb. 1, 2012	BIIB	Restricted Stock Unit	Common Stock (4,587)	$0.00	Feb. 23, 2014	4,587	Disposed

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

Initial ownership (Form 3) 4 holdings

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

Date	Ticker	Security	Shares	Ownership
Jan. 7, 2026	INDV	Ordinary Shares	920	Direct
Nov. 7, 2011	BIIB	Common Stock	0	Direct
Nov. 7, 2011	BIIB	Restricted Stock Unit→ Common Stock (13,759)	13,759	Direct
Nov. 7, 2011	BIIB	Restricted Stock Unit→ Common Stock (7,298)	7,298	Direct

Compensation (DEF 14A)

Matched by name from proxy statements (DEF 14A) — verify against the filing.

SRRK

CEO

Fiscal year	Salary	Bonus	Stock awards	Option awards	Non-equity incentive	Pension change	Other	Total
2020	$238,000	—	—	$4,396,154	$312,000	—	$6,692	$4,952,846

Figures from the Summary Compensation Table of the company's proxy statement (DEF 14A). Compensation is not a recommendation.