Blackstone Holdings II L.P. - 31 Dec 2025 SCHEDULE 13G/A Report for Compass Therapeutics, Inc. Common Stock, $0.0001 par value per share (CMPX)

Filing Manager
Blackstone Holdings II L.P.
Reporting Manager
Blackstone Alternative Asset Management Associates LLC
Security
Compass Therapeutics, Inc. Common Stock, $0.0001 par value per share
Symbol
CMPX
Shares outstanding
180,181,824 shares
Disclosed Ownership
6,126,182 shares
Ownership
3.4%
Form type
SCHEDULE 13G/A
Filing time
13 Feb 2026, 16:30:02 UTC
Date of event
31 Dec 2025
SEC
View on sec.gov

Reporting Managers (8)

Name Ownership Shares Owned sole voting power shared voting power Signature Title CIK
Blackstone Annex Master Fund L.P. 1.4% 2,447,820 0 2,447,820 /s/ Stephen O'Connor By: Blackstone Alternative Asset Management Associates LLC, its general partner, By: Stephen O'Connor, Authorized Person
Spruce Street Aggregator L.P. 2.1% 3,678,362 0 3,678,362 /s/ Stephen O'Connor By: Blackstone Alternative Asset Management Associates LLC, its general partner, By: Stephen O'Connor, Authorized Person
Blackstone Alternative Asset Management Associates LLC 3.4% 6,126,182 0 6,126,182 /s/ Stephen O'Connor Stephen O'Connor, Authorized Person
Blackstone Holdings II L.P. 3.4% 6,126,182 0 6,126,182 /s/ Victoria Portnoy Victoria Portnoy Managing Director - Assistant Secretary
Blackstone Holdings I/II GP L.L.C. 3.4% 6,126,182 0 6,126,182 /s/ Victoria Portnoy Victoria Portnoy Managing Director - Assistant Secretary
Blackstone Inc. 3.4% 6,126,182 0 6,126,182 /s/ Victoria Portnoy Victoria Portnoy Managing Director - Assistant Secretary
Blackstone Group Management L.L.C. 3.4% 6,126,182 0 6,126,182 /s/ Victoria Portnoy Victoria Portnoy Managing Director - Assistant Secretary
Stephen A. Schwarzman 3.4% 6,126,182 0 6,126,182 /s/ Stephen A. Schwarzman Stephen A. Schwarzman