Stacy Markel

Insider

First SEC filing: Feb. 12, 2021 · Latest: Feb. 12, 2021

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Insider at

0 buys (P) 1 sells (S) Net: $-753,750 + 12 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

12 other filings hidden

Date	Ticker	Code	Shares	Price	Value	Owned after	Δ own	A/D	vs now
June 23, 2026	NUVB	M	34,620	—	—	220,190 Direct	-13.59%	Disposed	(price as of 2026-08-20)
June 23, 2026	NUVB	M	90,380	—	—	409,620 Direct	-18.08%	Disposed	(price as of 2026-08-20)
June 23, 2026	NUVB	S 10b5-1	125,000	$6.03	$753,750	32,591 Direct	-79.32%	Disposed	16.6% (price as of 2026-08-20)
June 23, 2026	NUVB	M	34,620	$1.74	$60,239	157,591 Direct	+28.15%	Acquired	304.0% (price as of 2026-08-20)
June 23, 2026	NUVB	M	90,380	$1.87	$169,011	122,971 Direct	+277.32%	Acquired	275.9% (price as of 2026-08-20)
Feb. 28, 2023	NUVB	A	500,000	—	—	500,000 Direct	—	Acquired	(price as of 2026-08-20)
Aug. 29, 2022	NUVB	A	450,000	—	—	450,000 Direct	—	Acquired	(price as of 2026-08-20)
Feb. 28, 2022	NUVB	A	500,000	—	—	500,000 Direct	—	Acquired	(price as of 2026-08-20)
Feb. 10, 2021	NUVB	A	254,810	—	—	254,810 Direct	—	Acquired	(price as of 2026-08-20)
Feb. 10, 2021	NUVB	A	398,935	—	—	398,935 Direct	—	Acquired	(price as of 2026-08-20)
March 20, 2019	RIGL	A	62,500	—	—	62,500 Direct	—	Acquired	(price as of 2026-08-20)
Jan. 23, 2019	RIGL	A	137,500	—	—	137,500 Direct	—	Acquired	(price as of 2026-08-20)
March 21, 2018	RIGL	A	125,000	—	—	125,000 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
June 23, 2026	NUVB	Stock Option (Right to Buy)	Class A Common Stock (34,620)	$1.74	Jan. 21, 2030	34,620	Disposed
June 23, 2026	NUVB	Stock Option (Right to Buy)	Class A Common Stock (90,380)	$1.87	Feb. 27, 2034	90,380	Disposed
Feb. 28, 2023	NUVB	Stock Option (Right to Buy)	Class A Common Stock (500,000)	$1.94	Feb. 27, 2033	500,000	Acquired
Aug. 29, 2022	NUVB	Stock Option (Right to Buy)	Class A Common Stock (450,000)	$2.93	Aug. 28, 2032	450,000	Acquired
Feb. 28, 2022	NUVB	Stock Option (Right to Buy)	Class A Common Stock (500,000)	$5.06	Feb. 27, 2032	500,000	Acquired
Feb. 10, 2021	NUVB	Stock Option (Right to Buy)	Class A Common Stock (254,810)	$1.74	Jan. 21, 2030	254,810	Acquired
Feb. 10, 2021	NUVB	Stock Option (Right to Buy)	Class A Common Stock (398,935)	$4.60	Oct. 4, 2030	398,935	Acquired
March 20, 2019	RIGL	Employee Stock Option (right to buy)	Common Stock (62,500)	$3.94	March 21, 2028	62,500	Acquired
Jan. 23, 2019	RIGL	Employee Stock Option (right to buy)	Common Stock (137,500)	$2.00	Jan. 23, 2029	137,500	Acquired
March 21, 2018	RIGL	Employee Stock Option (Right to Buy)	Common Stock (125,000)	$3.94	March 21, 2028	125,000	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
Feb. 12, 2021	NUVB	No securities owned.	0	Direct