Jing L. Marantz

Insider

First SEC filing: June 15, 2026 · Latest: June 15, 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.

Insider at

Insider transactions

0 buys (P) 0 sells (S) Net: $0 + 19 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

19 other filings hidden

Date	Ticker	Code	Shares	Price	Value	Owned after	Δ own	A/D	vs now
June 5, 2026	ARCT	A	15,000	—	—	15,000 Direct	—	Acquired	(price as of 2026-08-20)
Feb. 9, 2026	SRRK	A	34,482	—	—	130,169 Direct	+36.04%	Acquired	(price as of 2026-08-20)
June 9, 2025	ARCT	A	15,000	—	—	15,000 Direct	—	Acquired	(price as of 2026-08-20)
Nov. 25, 2024	SRRK	M 10b5-1	6,375	—	—	130,000 Direct	-4.67%	Disposed	(price as of 2026-08-20)
Nov. 25, 2024	SRRK	S 10b5-1	200	$40.72	$8,144	72,855 Direct	-0.27%	Disposed	36.1% (price as of 2026-08-20)
Nov. 25, 2024	SRRK	S 10b5-1	3,075	$39.93	$122,785	73,055 Direct	-4.04%	Disposed	38.8% (price as of 2026-08-20)
Nov. 25, 2024	SRRK	S 10b5-1	2,100	$39.25	$82,425	76,130 Direct	-2.68%	Disposed	41.2% (price as of 2026-08-20)
Nov. 25, 2024	SRRK	S 10b5-1	1,000	$38.04	$38,040	78,230 Direct	-1.26%	Disposed	45.7% (price as of 2026-08-20)
Nov. 25, 2024	SRRK	M 10b5-1	6,375	$8.59	$54,761	79,230 Direct	+8.75%	Acquired	545.1% (price as of 2026-08-20)
Nov. 22, 2024	SRRK	M 10b5-1	2,145	—	—	136,375 Direct	-1.55%	Disposed	(price as of 2026-08-20)
Nov. 22, 2024	SRRK	S 10b5-1	2,145	$30.01	$64,371	72,855 Direct	-2.86%	Disposed	84.6% (price as of 2026-08-20)
Nov. 22, 2024	SRRK	M 10b5-1	2,145	$8.59	$18,426	75,000 Direct	+2.94%	Acquired	545.1% (price as of 2026-08-20)
Oct. 7, 2024	SRRK	M	109,375	—	—	140,625 Direct	-43.75%	Disposed	(price as of 2026-08-20)
Oct. 7, 2024	SRRK	S 10b5-1	39,375	$30.06	$1,183,612	72,855 Direct	-35.08%	Disposed	84.3% (price as of 2026-08-20)
Oct. 7, 2024	SRRK	S 10b5-1	2,552	$26.22	$66,913	112,230 Direct	-2.22%	Disposed	111.3% (price as of 2026-08-20)
Oct. 7, 2024	SRRK	S 10b5-1	67,448	$25.59	$1,725,994	114,782 Direct	-37.01%	Disposed	116.5% (price as of 2026-08-20)
Oct. 7, 2024	SRRK	M 10b5-1	109,375	$8.59	$939,531	182,230 Direct	+150.13%	Acquired	545.1% (price as of 2026-08-20)
June 14, 2024	ARCT	A	15,000	—	—	15,000 Direct	—	Acquired	(price as of 2026-08-20)
June 14, 2024	ARCT	M	3,131	—	—	0 Direct	-100.00%	Disposed	(price as of 2026-08-20)
June 14, 2024	ARCT	M	3,131	—	—	3,131 Direct	—	Acquired	(price as of 2026-08-20)
Aug. 1, 2023	ARCT	A	3,131	—	—	3,131 Direct	—	Acquired	(price as of 2026-08-20)
Aug. 1, 2023	ARCT	A	11,869	—	—	11,869 Direct	—	Acquired	(price as of 2026-08-20)
Nov. 14, 2022	SRRK	A	250,000	—	—	250,000 Direct	—	Acquired	(price as of 2026-08-20)
June 23, 2022	ARCT	A	15,000	—	—	15,000 Direct	—	Acquired	(price as of 2026-08-20)
Dec. 7, 2021	ARCT	A	6,699	—	—	6,699 Direct	—	Acquired	(price as of 2026-08-20)
Dec. 7, 2021	ARCT	A	20,000	—	—	20,000 Direct	—	Acquired	(price as of 2026-08-20)
Jan. 4, 2021	KRYS	A	13,600	—	—	13,600 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
June 5, 2026	ARCT	Stock option (right to buy) [F1]	Common Stock (15,000)	$7.30	June 5, 2036	15,000	Acquired
June 9, 2025	ARCT	Stock option (right to buy) [F1]	Common Stock (15,000)	$12.54	June 9, 2035	15,000	Acquired
Nov. 25, 2024	SRRK	Stock Option (Right to Buy)	Common Stock (6,375)	$8.59	Nov. 14, 2032	6,375	Disposed
Nov. 22, 2024	SRRK	Stock Option (Right to Buy)	Common Stock (2,145)	$8.59	Nov. 14, 2032	2,145	Disposed
Oct. 7, 2024	SRRK	Stock Option (Right to Buy)	Common Stock (109,375)	$8.59	Nov. 14, 2032	109,375	Disposed
June 14, 2024	ARCT	Stock option (right to buy) [F3]	Common Stock (15,000)	$31.00	June 14, 2034	15,000	Acquired
June 14, 2024	ARCT	Deferred Stock Units [F2]	Common Stock (3,131)	$0.00	—	3,131	Disposed
Aug. 1, 2023	ARCT	Deferred Stock Units	Common Stock (3,131)	—	—	3,131	Acquired
Aug. 1, 2023	ARCT	Stock option (right to buy)	Common Stock (11,869)	$34.92	Aug. 1, 2033	11,869	Acquired
Nov. 14, 2022	SRRK	Stock Option (right to buy)	Common Stock (250,000)	$8.59	Nov. 14, 2032	250,000	Acquired
June 23, 2022	ARCT	Stock Option (right to buy)	Common Stock (15,000)	$16.02	June 23, 2032	15,000	Acquired
Dec. 7, 2021	ARCT	Stock option (right to buy)	Common Stock (6,699)	$38.54	Dec. 6, 2031	6,699	Acquired
Dec. 7, 2021	ARCT	Stock option (right to buy)	Common Stock (20,000)	$38.54	Dec. 6, 2031	20,000	Acquired
Jan. 4, 2021	KRYS	Stock Option (Right to Buy)	Common Stock (13,600)	$59.42	Jan. 4, 2031	13,600	Acquired

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