Lynne Marie Sullivan

Insider

First SEC filing: Jan. 25, 2018 · Latest: June 11, 2026

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Insider at

0 buys (P) 0 sells (S) Net: $0 + 13 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

No open-market trades on record; showing all filings.

Date	Ticker	Code	Shares	Price	Value	Owned after	Δ own	A/D	vs now
June 10, 2026	SLDB	A	77,500	—	—	77,500 Direct	—	Acquired	(price as of 2026-08-21)
June 12, 2025	SLDB	A	77,500	—	—	77,500 Direct	—	Acquired	(price as of 2026-08-21)
June 11, 2024	SLDB	A	34,400	—	—	34,400 Direct	—	Acquired	(price as of 2026-08-21)
June 6, 2023	SLDB	A	9,650	—	—	9,650 Direct	—	Acquired	(price as of 2026-08-21)
Dec. 13, 2022	SLDB	A	9,650	—	—	9,650 Direct	—	Acquired	(price as of 2026-08-21)
June 7, 2022	SLDB	A	51,000	—	—	51,000 Direct	—	Acquired	(price as of 2026-08-21)
June 16, 2021	SLDB	A	30,000	—	—	30,000 Direct	—	Acquired	(price as of 2026-08-21)
June 16, 2020	SLDB	A	30,000	—	—	30,000 Direct	—	Acquired	(price as of 2026-08-21)
June 3, 2020	ACET	A	14,414	—	—	14,414 Direct	—	Acquired	(price as of 2026-08-21)
June 13, 2019	SLDB	A	10,000	—	—	10,000 Direct	—	Acquired	(price as of 2026-08-21)
May 8, 2019	ACET	A	14,414	—	—	14,414 Direct	—	Acquired	(price as of 2026-08-21)
Dec. 13, 2018	SLDB	A	8,165	—	—	8,165 Direct	—	Acquired	(price as of 2026-08-21)
July 25, 2018	SLDB	A	1,835	—	—	1,835 Direct	—	Acquired	(price as of 2026-08-21)

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.

Options, RSUs and convertible securities reported on Form 4 Table II.

Date	Ticker	Security	Underlying	Exercise price	Expiration	Shares	A/D
June 10, 2026	SLDB	Director Stock Option (Right to Buy)	Common Stock (77,500)	$6.61	June 10, 2036	77,500	Acquired
June 12, 2025	SLDB	Director Stock Option (Right to Buy)	Common Stock (77,500)	$4.58	June 12, 2035	77,500	Acquired
June 11, 2024	SLDB	Director Stock Option (Right to Buy)	Common Stock (34,400)	$7.51	June 11, 2034	34,400	Acquired
June 6, 2023	SLDB	Director Stock Option (Right to Buy)	Common Stock (9,650)	$6.37	June 6, 2033	9,650	Acquired
Dec. 13, 2022	SLDB	Director Stock Option (Right to Buy)	Common Stock (9,650)	$6.47	Dec. 13, 2032	9,650	Acquired
June 7, 2022	SLDB	Director Stock Option (Right to Buy)	Common Stock (51,000)	$0.62	June 7, 2032	51,000	Acquired
June 16, 2021	SLDB	Director Stock Option (Right to Buy)	Common Stock (30,000)	$3.94	June 16, 2031	30,000	Acquired
June 16, 2020	SLDB	Director Stock Option (Right to Buy)	Common Stock (30,000)	$3.03	June 16, 2030	30,000	Acquired
June 3, 2020	ACET	Stock Option (Right to Buy)	Common Stock (14,414)	$2.23	June 2, 2030	14,414	Acquired
June 13, 2019	SLDB	Director Stock Option (Right to Buy)	Common Stock (10,000)	$5.26	June 13, 2029	10,000	Acquired
May 8, 2019	ACET	Stock Option (Right to Buy)	Common Stock (14,414)	$7.99	May 7, 2029	14,414	Acquired
Dec. 13, 2018	SLDB	Director Stock Option (Right to Buy)	Common Stock (8,165)	$23.58	Dec. 13, 2028	8,165	Acquired
July 25, 2018	SLDB	Director Stock Option (Right to Buy)	Common Stock (1,835)	$37.89	July 25, 2028	1,835	Acquired

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

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

Date	Ticker	Security	Shares	Ownership
Jan. 25, 2018	ACET	Stock Option (Right to Buy)→ Common Stock (23,430)	23,430	Direct