Neil Lerner

Insider

First SEC filing: Dec. 10, 2024 · Latest: Dec. 10, 2024

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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.

Insider at

CMPX buying April 29, 2026

Insider transactions

1 buys (P) 0 sells (S) Net: $28,350 + 4 non-open-market transactions below Avg return of open purchases vs now: 31.5% 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

4 other filings hidden

Date	Ticker	Code	Shares	Price	Value	Owned after	Δ own	A/D	vs now
April 29, 2026	CMPX	P	15,000	$1.89	$28,350	397,500 Direct	+3.92%	Acquired	31.5% (price as of 2026-08-19)
April 29, 2026	CMPX	A	15,000	$1.89	$28,350	397,500 Direct	+3.92%	Acquired	31.5% (price as of 2026-08-19)
Jan. 2, 2026	CMPX	A	435,000	—	—	435,000 Direct	—	Acquired	(price as of 2026-08-19)
Jan. 2, 2026	CMPX	A	62,500	$5.17	$323,125	382,500 Direct	+19.53%	Acquired	-51.9% (price as of 2026-08-19)
April 7, 2025	CMPX	P	20,000	$1.42	$28,400	320,000 Direct	+6.67%	Acquired	75.0% (price as of 2026-08-19)
Feb. 11, 2025	CMPX	A	200,000	—	—	200,000 Direct	—	Acquired	(price as of 2026-08-19)

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
Jan. 2, 2026	CMPX	Stock Option (Right to Buy)	Common Stock (435,000)	$5.17	Jan. 2, 2036	435,000	Acquired
Feb. 11, 2025	CMPX	Stock Option (Right to Buy)	Common Stock (200,000)	$3.65	Feb. 11, 2035	200,000	Acquired

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

Initial ownership (Form 3) 8 holdings

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

Date	Ticker	Security	Shares	Ownership
Dec. 10, 2024	CMPX	Common Stock	300,000	Direct
Dec. 10, 2024	CMPX	Stock Option (right to buy)→ Common Stock (90,000)	90,000	Direct
Dec. 10, 2024	CMPX	Stock Option (right to buy)→ Common Stock (40,000)	40,000	Direct
Dec. 10, 2024	CMPX	Stock Option (right to buy)→ Common Stock (85,000)	85,000	Direct
Dec. 10, 2024	CMPX	Stock Option (right to buy)→ Common Stock (50,000)	50,000	Direct
Dec. 10, 2024	CMPX	Stock Option (right to buy)→ Common Stock (80,000)	80,000	Direct
Dec. 10, 2024	CMPX	Stock Option (right to buy)→ Common Stock (60,000)	60,000	Direct
Dec. 10, 2024	CMPX	Stock Option (right to buy)→ Common Stock (175,000)	175,000	Direct