Company Analysis

Compass Therapeutics, Inc. (CMPX)

Nasdaq: CMPX · Biological Products, (No Diagnostic Substances) · Boston, MA · filing with the SEC since 2018
Grade4.7
◀ Past 4.0● Present 5.5▶ Future 4.4
4 est.

Filings

218 filings since 2017 beside 144 insider forms · Non-accelerated filer and smaller reporting company · read from EDGAR on Nov 13, 2026
Due nextNon-accelerated filer and smaller reporting company
10-K Annual report for the fiscal year ending Dec 31, 2026Non-accelerated filers and smaller reporting companies have 90 days after the fiscal year ends. by Mar 31, 2027
10-Q Quarterly report for the quarter ending Mar 31, 2027Non-accelerated filers and smaller reporting companies have 45 days after the quarter ends; quarter ends are taken to the month end. by May 15, 2027

A deadline is the latest date the SEC's rules allow for its filer category. It is not a forecast of the day the company files. Last time, the results release (8-K item 2.02) came 40 days after the quarter ended. The proxy statement was last filed Apr 29, 2026.

Filings a yearinsider forms included
553456142435949
20192020202120222023202420252026

2026 counts to Nov 13, 2026.

Officer or director change (8-K item 5.02): 3 times in the last 36 months, the newest Dec 10, 2024.SEC letters: 4 in the last 36 months, the newest Jan 5, 2026.
Insider forms 144

Insider forms (3, 4, 5 and 144) are counted each year but not listed here; the people and their trades are on the Ownership tab.

FiledFormWhat it is, in plain wordsPeriodAsk
Nov 10, 2026 SCHEDULE 13G Large holder notice
Nov 9, 2026 10-Q Quarterly report Sep 30, 2026
Nov 9, 2026 8-K items 2.02, 9.01 Results released · Current report
Sep 22, 2026 8-K items 7.01, 9.01 Investor disclosure (Regulation FD) · Current report
Aug 14, 2026 SCHEDULE 13G/A Large holder update, amended
Aug 7, 2026 SCHEDULE 13G Large holder notice
Aug 6, 2026 10-Q Quarterly report Jun 30, 2026
Aug 6, 2026 8-K items 2.02, 9.01 Results released · Current report
Jul 1, 2026 8-K items 7.01, 9.01 Investor disclosure (Regulation FD) · Current report
Jun 23, 2026 8-K items 5.03, 9.01 Charter, bylaw or fiscal-year change · Current report Jun 22, 2026
Jun 11, 2026 8-K item 5.07 Shareholder vote · Current report Jun 10, 2026
May 15, 2026 SCHEDULE 13G/A Large holder update, amended
May 5, 2026 10-Q Quarterly report Mar 31, 2026
May 5, 2026 8-K items 2.02, 9.01 Results released · Current report
Apr 29, 2026 ARS Annual report to shareholders Dec 31, 2025
Apr 29, 2026 DEFA14A Extra proxy material
Apr 29, 2026 DEF 14A Proxy statement Jun 10, 2026
Apr 27, 2026 8-K items 7.01, 8.01, 9.01 Investor disclosure (Regulation FD); Other event · Current report
Mar 12, 2026 S-8 Employee stock plan registration
Mar 5, 2026 10-K Annual report Dec 31, 2025
Mar 5, 2026 8-K items 2.02, 9.01 Results released · Current report
Feb 13, 2026 SCHEDULE 13G/A Large holder update, amended
Jan 21, 2026 SCHEDULE 13G Large holder notice
Jan 7, 2026 EFFECT Registration effective
Jan 6, 2026 8-K items 2.02, 8.01, 9.01 Results released; Other event · Current report
Jan 5, 2026 CORRESP Reply to the SEC
Jan 2, 2026 UPLOAD SEC comment letter
Dec 31, 2025 DEL AM Form DEL AM
Dec 30, 2025 S-3 Shelf registration
Nov 14, 2025 SCHEDULE 13G/A Large holder update, amended
Nov 14, 2025 SCHEDULE 13G/A Large holder update, amended
Nov 14, 2025 SCHEDULE 13G Large holder notice
Nov 5, 2025 10-Q Quarterly report Sep 30, 2025
Nov 5, 2025 8-K items 2.02, 9.01 Results released · Current report
Oct 29, 2025 SCHEDULE 13G Large holder notice
Aug 21, 2025 SCHEDULE 13G/A Large holder update, amended
Aug 18, 2025 SCHEDULE 13D/A Activist holder update, amended
Aug 15, 2025 SCHEDULE 13D/A Activist holder update, amended
Aug 14, 2025 SCHEDULE 13G/A Large holder update, amended
Aug 14, 2025 SCHEDULE 13G/A Large holder update, amended
40 of 218 shown

Every row opens the filing on EDGAR. The plain words are the site's own for each form and each 8-K item; the complete history, insider forms included, is on EDGAR.

SI Assistanton CMPX · research, not advice