John Kenneth Jenkins

Insider

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

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Insider at

0 buys (P) 1 sells (S) Net: $-37,968 + 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

13 other filings hidden

Date	Ticker	Code	Shares	Price	Value	Owned after	Δ own	A/D	vs now
June 10, 2026	CRBP	S 10b5-1	4,800	$7.91	$37,968	3,833 Direct	-55.60%	Disposed	24.5% (price as of 2026-08-20)
May 19, 2026	CRBP	A	12,300	—	—	12,300 Direct	—	Acquired	(price as of 2026-08-20)
May 19, 2026	CRBP	A	3,800	—	—	8,633 Direct	+78.63%	Acquired	(price as of 2026-08-20)
May 30, 2025	CRBP	A	16,000	—	—	16,000 Direct	—	Acquired	(price as of 2026-08-20)
May 30, 2025	CRBP	A	4,800	—	—	4,833 Direct	+14545.45%	Acquired	(price as of 2026-08-20)
May 30, 2025	CRBP	S 10b5-1	2,783	$7.35	$20,455	33 Direct	-98.83%	Disposed	34.0% (price as of 2026-08-20)
May 30, 2024	CRBP	A	2,783	—	—	2,816 Direct	+8433.33%	Acquired	(price as of 2026-08-20)
May 16, 2024	CRBP	A	2,783	—	—	2,783 Direct	—	Acquired	(price as of 2026-08-20)
May 18, 2023	CRBP	A	5,300	—	—	5,300 Direct	—	Acquired	(price as of 2026-08-20)
May 18, 2022	CRBP	A	79,600	—	—	79,600 Direct	—	Acquired	(price as of 2026-08-20)
June 17, 2021	CRBP	A	58,200	—	—	58,200 Direct	—	Acquired	(price as of 2026-08-20)
June 17, 2021	CRBP	A	58,200	—	—	58,200 Direct	—	Acquired	(price as of 2026-08-20)
May 20, 2020	CRBP	A	40,500	—	—	40,500 Direct	—	Acquired	(price as of 2026-08-20)
May 22, 2019	CRBP	A	33,300	—	—	33,300 Direct	—	Acquired	(price as of 2026-08-20)
March 15, 2019	CRBP	P	1,000	$6.98	$6,980	1,000 Direct	—	Acquired	-95.3% (price as of 2026-08-20)
June 5, 2018	CRBP	A	68,000	—	—	68,000 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.

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

Date	Ticker	Security	Underlying	Exercise price	Expiration	Shares	A/D
May 19, 2026	CRBP	Stock options (right to buy)	Common Stock (12,300)	$9.15	May 19, 2026	12,300	Acquired
May 30, 2025	CRBP	Stock options (right to buy)	Common Stock (16,000)	$7.42	May 30, 2035	16,000	Acquired
May 16, 2024	CRBP	Stock Option (right to buy)	Common Stock (2,783)	$45.92	May 16, 2034	2,783	Acquired
May 18, 2023	CRBP	Stock Option (right to buy)	Common Stock (5,300)	$9.96	May 18, 2033	5,300	Acquired
May 18, 2022	CRBP	Stock Option(right to buy) [F1]	Common Stock (79,600)	$0.33	May 18, 2032	79,600	Acquired
June 17, 2021	CRBP	Stock Option (right to buy)	Common Stock (58,200)	$2.07	June 17, 2031	58,200	Acquired
June 17, 2021	CRBP	Stock Option (right to buy)	Common Stock (58,200)	$2.07	June 17, 2031	58,200	Acquired
May 20, 2020	CRBP	Stock Option(right to buy) [F1]	Common Stock (40,500)	$7.30	May 20, 2030	40,500	Acquired
May 22, 2019	CRBP	Stock Option(right to buy) [F1]	Common Stock (33,300)	$7.31	May 22, 2029	33,300	Acquired
June 5, 2018	CRBP	Stock Option(right to buy) [F1]	Common Stock (68,000)	$6.00	June 5, 2028	68,000	Acquired

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