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Lerner Neil's Form 4/A amendment

Amended

Compass Therapeutics, Inc. (CMPX) · filed Apr 30, 2026

Accession no.
0001171843-26-002894
Filed
Apr 30, 2026
Trade date
Apr 29, 2026
Filing delay
1 day
Rule 10b5-1 plan
Not checked
Original filed
Apr 29, 2026

This filing lists 1 non-derivative transaction. Open-market purchases total $28.4K. It was filed 1 day after the trade.

This amendment replaces 0001171843-26-002834 (filed Apr 29, 2026).

Reporting owners

A Form 4 can have several reporting owners, such as a person and a fund they control. Trade tables show the first one.

Reporting owners on this filing
OwnerRelationship to the company
Lerner NeilCIK 0001505148Officer (Chief Accounting Officer)

Non-derivative securities (Table I)

Acquisitions and disposals of common stock and similar shares, one row per line on the filing.

Non-derivative transactions
Trade dateSecurityTransactionSharesPriceValueShares afterOwnershipFlags
Apr 29, 2026Common StockPPurchaseAcquired+15,000$1.89+$28,350397,500Direct

Footnotes and remarks

Livermore keeps the footnotes that transaction prices refer to, all footnotes of amendments (Form 4/A) and the filing's remarks. Other footnotes, such as how indirect holdings are held or the details of a trading plan, are only in the original on SEC EDGAR.

F1

62,500 of the shares represents unvested restricted stock units ("RSU") granted on January 2, 2026. Each RSU represents a contingent right to receive one share of common stock. The award is subject to service-based vesting conditions and vests in four equal annual installments, with the first installment vested on January 2, 2027.

Remarks

Explanatory Note: This amendment is being filed to correct the transaction code reported in Table I of the original Form 4 filed on April 29, 2026. The transaction was inadvertently reported using transaction code A. The correct transaction code is P, which reflects that the transaction was an open market purchase. All other information in the original filing remains unchanged.

Read the full filing on SEC EDGAR (opens in a new tab)