SEC Form 3
FORM 3 UNITED STATES SECURITIES AND EXCHANGE COMMISSION
Washington, D.C. 20549

INITIAL STATEMENT OF BENEFICIAL OWNERSHIP OF SECURITIES

Filed pursuant to Section 16(a) of the Securities Exchange Act of 1934
or Section 30(h) of the Investment Company Act of 1940
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1. Name and Address of Reporting Person*
ORBIMED ADVISORS LLC

(Last) (First) (Middle)
601 LEXINGTON AVENUE, 54TH FLOOR

(Street)
NEW YORK, NY 10022

(City) (State) (Zip)
2. Date of Event Requiring Statement (Month/Day/Year)
06/17/2020
3. Issuer Name and Ticker or Trading Symbol
Compass Therapeutics, Inc. [ NONE ]
4. Relationship of Reporting Person(s) to Issuer
(Check all applicable)
X Director X 10% Owner
Officer (give title below) Other (specify below)
5. If Amendment, Date of Original Filed (Month/Day/Year)
6. Individual or Joint/Group Filing (Check Applicable Line)
Form filed by One Reporting Person
X Form filed by More than One Reporting Person
Table I - Non-Derivative Securities Beneficially Owned
1. Title of Security (Instr. 4) 2. Amount of Securities Beneficially Owned (Instr. 4) 3. Ownership Form: Direct (D) or Indirect (I) (Instr. 5) 4. Nature of Indirect Beneficial Ownership (Instr. 5)
Common Stock 11,259,272 D(1)
Table II - Derivative Securities Beneficially Owned
(e.g., puts, calls, warrants, options, convertible securities)
1. Title of Derivative Security (Instr. 4) 2. Date Exercisable and Expiration Date (Month/Day/Year) 3. Title and Amount of Securities Underlying Derivative Security (Instr. 4) 4. Conversion or Exercise Price of Derivative Security 5. Ownership Form: Direct (D) or Indirect (I) (Instr. 5) 6. Nature of Indirect Beneficial Ownership (Instr. 5)
Date Exercisable Expiration Date Title Amount or Number of Shares
1. Name and Address of Reporting Person*
ORBIMED ADVISORS LLC

(Last) (First) (Middle)
601 LEXINGTON AVENUE, 54TH FLOOR

(Street)
NEW YORK, NY 10022

(City) (State) (Zip)
1. Name and Address of Reporting Person*
OrbiMed Capital GP V LLC

(Last) (First) (Middle)
601 LEXINGTON AVENUE, 54TH FLOOR

(Street)
NEW YORK, NY 10022

(City) (State) (Zip)
Explanation of Responses:
1. These shares are held of record by OrbiMed Private Investments V-KA, LP ("OPI V-KA"). OrbiMed Capital GP V LLC ("OrbiMed GP V") is the general partner of OPI V-KA and OrbiMed Advisors LLC ("OrbiMed Advisors") is the managing member of OrbiMed GP V. By virtue of such relationships, OrbiMed GP V and OrbiMed Advisors may be deemed to have voting and investment power over the shares held by OPI V-KA and as a result, may be deemed to have beneficial ownership over such securities. OrbiMed Advisors exercises voting and investment power through a management committee comprised of Carl L. Gordon, Sven H. Borho, and Jonathan T. Silverstein, each of whom disclaims beneficial ownership of the shares held by OPI V-KA.
OrbiMed Advisors LLC By: Douglas Coon Its: Chief Compliance Officer 06/23/2020
OrbiMed Capital GP V LLC By: Douglas Coon Its: Chief Compliance Officer 06/23/2020
** Signature of Reporting Person Date
Reminder: Report on a separate line for each class of securities beneficially owned directly or indirectly.
* If the form is filed by more than one reporting person, see Instruction 5 (b)(v).
** Intentional misstatements or omissions of facts constitute Federal Criminal Violations See 18 U.S.C. 1001 and 15 U.S.C. 78ff(a).
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