# EDGAR Filing Document

**Accession Number:** 0001738021
**File Stem:** 9999999995-23-000145
**Filing Date:** 2023-1
**Character Count:** 1354
**Document Hash:** 434bc515f8af070ee8220fd96ed57af1
**Contains OCR:** False
**Source Format:** 

## Filing Content

## Filing Summary
**9999999995-23-000145.hdr.sgml**: 20230123

**ACCESSION NUMBER**: 9999999995-23-000145

**CONFORMED SUBMISSION TYPE**: EFFECT

**PUBLIC DOCUMENT COUNT**: 1

**FILED AS OF DATE**: 20230120

**DATE AS OF CHANGE**: 20230123

**EFFECTIVENESS DATE**: 20230120

**FILER**: 

**COMPANY DATA:**
- **COMPANY CONFORMED NAME:** Compass Therapeutics, Inc.
- **CENTRAL INDEX KEY:** 0001738021
- **STANDARD INDUSTRIAL CLASSIFICATION:** BIOLOGICAL PRODUCTS (NO DIAGNOSTIC SUBSTANCES) [2836]
- **IRS NUMBER:** 000000000
- **STATE OF INCORPORATION:** DE
- **FISCAL YEAR END:** 1231

**FILING VALUES:**
- **FORM TYPE:** EFFECT
- **SEC ACT:** 1933 Act
- **SEC FILE NUMBER:** 333-268652
- **FILM NUMBER:** 23542432

**BUSINESS ADDRESS:**
- **STREET 1:** 80 GUEST STREET
- **CITY:** BOSTON
- **STATE:** MA
- **ZIP:** 02135
- **BUSINESS PHONE:** 617-500-8099

**MAIL ADDRESS:**
- **STREET 1:** 80 GUEST STREET
- **CITY:** BOSTON
- **STATE:** MA
- **ZIP:** 02135

**FORMER COMPANY:**
- **FORMER CONFORMED NAME:** Olivia Ventures, Inc.
- **DATE OF NAME CHANGE:** 20180419

### UNITED STATES
### SECURITIES AND EXCHANGE COMMISSION
**Washington, D.C. 20549**

## Notice of Effectiveness

**Date:** January 20, 2023

**Time:** 16:01:00

**Form Type:** S-3

---

**CIK:** 0001738021

**Company Name:** Compass Therapeutics, Inc.

**File Number:** 333-268652