Ellen Chiniara - 02 Jan 2026 Form 4 Insider Report for Compass Therapeutics, Inc. (CMPX)

Reporting relationship: Director
Issuer ticker: CMPX
Reported as of: 02 Jan 2026
Net transaction value: $0
SEC form: 4
Accepted by SEC: 05 Jan 2026, 16:33:04 UTC
Prior SEC filing: 03 Mar 2025
Source filing: View source filing
Reporting owner signature: /s/ Neil Lerner, attorney-in-fact

Key filing fact

Ellen Chiniara filed Form 4 for Compass Therapeutics, Inc. (CMPX) on 05 Jan 2026.

Key facts

This page summarizes Ellen Chiniara's Form 4 filing for Compass Therapeutics, Inc. (CMPX).
1 reported transaction and 1 derivative row are listed below.
Accepted by SEC: 05 Jan 2026, 16:33.

Change

Previous filing in this sequence was filed on 03 Mar 2025.
Current net transaction value: $0.

Research use

This tells you what this filing adds before you inspect full transaction and derivative tables.
You can trace every row back to the original SEC filing document.

Evidence

Filed on Form 4

Ownership activity is grounded in SEC Form 4 disclosures.

View source filing

Reporting Owners (1)

CIK 0001398764 Primary reporting owner

Chiniara Ellen

Relationship: Director
Address: C/O COMPASS THERAPEUTICS, INC., 80 GUEST STREET, SUITE 601, BOSTON
Signature: /s/ Neil Lerner, attorney-in-fact
Signature date: 05 Jan 2026

Reported derivative securities

Options, warrants, convertible securities, or similar derivative positions disclosed in the filing.

CMPX transaction Derivative

Stock Option (Right to Buy)

Award

Transaction value: $0
Shares: +90,000
Change %
Price: $0.000000
Shares after: 90,000
Date: 02 Jan 2026
Ownership: Direct
Underlying class: Common Stock
Underlying amount: 90,000
Exercise price: $5.17
Footnotes: F1

^* marks a reported price that did not pass the local price check.

Additional SEC filing notes

Filing notes and footnotes

Explanation of responses 1 footnote

Footnote F1

This grant vests in full upon the earlier of (i) June 10, 2026 or (ii) the date of the next annual meeting of the Company's stockholders.

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