Compass Therapeutics, Inc.

Regulation FD Disclosure

Beneficial ownership report for a passive holder of more than 5% (Schedule 13G) (amendment)

Beneficial ownership report for a passive holder of more than 5% (Schedule 13G)

General form for quarterly reports under Section 13 or 15(d)

Results of Operations and Financial Condition

Regulation FD Disclosure

Amendments to Articles of Incorporation or Bylaws; Change in Fiscal Year

Submission of Matters to a Vote of Security Holders

Beneficial ownership report for a passive holder of more than 5% (Schedule 13G) (amendment)

General form for quarterly reports under Section 13 or 15(d)

Results of Operations and Financial Condition

Annual Report Scanned (Paper)

Definitive Proxy Statement

Additional Information for Proxy Statement/ Votes

Regulation FD Disclosure

Registration statement under Securities Act of 1933 to be offered to employees pursuant to certain plans

Annual report pursuant to Section 13 or 15(d)

Results of Operations and Financial Condition

Beneficial ownership report for a passive holder of more than 5% (Schedule 13G) (amendment)

Beneficial ownership report for a passive holder of more than 5% (Schedule 13G)

Notice of Effectiveness

Results of Operations and Financial Condition

Correspondence with the SEC

Letter from the SEC

No description available

Registration statement under Securities Act of 1933

General form for quarterly reports under Section 13 or 15(d)

Results of Operations and Financial Condition

Entry into a Material Definitive Agreement

Prospectus Supplement for Primary Offering

Prospectus Supplement for Primary Offering

General form for quarterly reports under Section 13 or 15(d)

Results of Operations and Financial Condition

Submission of Matters to a Vote of Security Holders

General form for quarterly reports under Section 13 or 15(d)

Results of Operations and Financial Condition

Annual Report Scanned (Paper)

Additional Information for Proxy Statement/ Votes

Definitive Proxy Statement

Regulation FD Disclosure

Registration statement under Securities Act of 1933 to be offered to employees pursuant to certain plans

Annual report pursuant to Section 13 or 15(d)

Results of Operations and Financial Condition

Results of Operations and Financial Condition

Departure of Directors or Certain Officers; Election of Directors; Appointment of Certain Officers: Compensatory Arrangements of Certain Officers

General form for quarterly reports under Section 13 or 15(d)

Results of Operations and Financial Condition

Notice of Effectiveness

Correspondence with the SEC

Letter from the SEC

Registration statement under Securities Act of 1933

General form for quarterly reports under Section 13 or 15(d)

2.02,9.01

Additional Information for Proxy Statement/ Votes

General form for quarterly reports under Section 13 or 15(d)

Annual Report Scanned (Paper)

Definitive Proxy Statement

Additional Information for Proxy Statement/ Votes

Annual report pursuant to Section 13 or 15(d)

General form for quarterly reports under Section 13 or 15(d)

General form for quarterly reports under Section 13 or 15(d)

General form for quarterly reports under Section 13 or 15(d)

Annual Report Scanned (Paper)

Additional Information for Proxy Statement/ Votes

Definitive Proxy Statement

Annual report pursuant to Section 13 or 15(d)

Prospectus Supplement for Primary Offering

Notice of Effectiveness

Correspondence with the SEC

Correspondence with the SEC

Correspondence with the SEC

Letter from the SEC

Registration statement under Securities Act of 1933

General form for quarterly reports under Section 13 or 15(d)

General form for quarterly reports under Section 13 or 15(d)

Prospectus Supplement for Primary Offering

Additional Information for Proxy Statement/ Votes

General form for quarterly reports under Section 13 or 15(d)

Definitive Proxy Statement

Annual report pursuant to Section 13 or 15(d)

Prospectus Supplement for Primary Offering

Prospectus Supplement for Primary Offering

General form for quarterly reports under Section 13 or 15(d)

Prospectus Supplement for Primary Offering

Registration of Securities on Exchange

Prospectus Supplement for Primary Offering

Certification of approval for listing and registration on a national securities exchange

Notice of Effectiveness

Correspondence with the SEC

Letter from the SEC

Definitive Proxy Statement

Correspondence with the SEC

Draft registration statement (confidential submission)

Letter from the SEC

Letter from the SEC

Correspondence with the SEC

Letter from the SEC

Lerner Neil

Lerner Neil

Lerner Neil

Anderman Jonathan

Anderman Jonathan

Lerner Neil

Schuetz Thomas J.

Schuetz Thomas J.

Sirard Cynthia

Prasad Arjun

GRAY MARY ANN

Boylan James P

GORDON CARL L

Ferneau Philip

Anderman Jonathan