Compass Therapeutics, Inc.

CMPX

Exchange: Nasdaq
Industry: Biological Products, (No Diagnostic Substances)
SEC CIK: 0001738021

SEC filings (opens in a new tab)

In the last 90 days, Compass Therapeutics, Inc. insiders filed 1 open-market purchase and 0 sales; 215 institutions reported holding it in 13F filings for Q2 2026, worth $363.4M in total; no superinvestor holds it.

Q3 2025 vs. Q2 2025

How the institutions holding Compass Therapeutics, Inc. changed between Q2 2025 and Q3 2025.

All holders in Q3 2025 All holders in Q2 2025

13F holders of CMPX: Q2 2025 compared with Q3 2025
Measure	Q2 2025	Of which not filed for Q3 2025	Q3 2025	Change
Holders	103	1	125	+23
Shares	108.3M	11.3K	151.1M	+42.8M (+39.6%)
Value	$281.5M	$29.4K	$528.7M	+$247.3M (+87.9%)

1 institution that held it in Q2 2025 haven't filed for Q3 2025 yet. Not filing isn't selling, so the changes leave them out.

New holders (33)

Institutions that held Compass Therapeutics, Inc. at the end of Q3 2025 but not at the end of Q2 2025.

Institutions new to CMPX in Q3 2025
Institution	Shares	Value	% of portfolio
BVF Inc	4,750,000	$16.6M	0.67%
Balyasny Asset Management LLC	2,826,362	$9.89M	0.02%
RTW Investments, LP	2,500,000	$8.75M	0.11%
Logos Global Management LP	2,050,000	$7.17M	0.71%
Sofinnova Investments, Inc.	2,028,886	$7.10M	0.44%
Birchview Capital, LP	872,938	$3.06M	2.31%
Acuta Capital Partners, LLC	840,090	$2.94M	3.04%
Burkehill Global Management, LP	700,000	$2.45M	0.14%
Schonfeld Strategic Advisors LLC	476,291	$1.67M	0.01%
Citadel Advisors LLC	233,271	$816.4K	0.00%
CM Management, LLC	150,000	$525.0K	0.44%
Atom Investors LP	106,674	$373.4K	0.03%
Rafferty Asset Management, LLC	70,959	$248.4K	0.00%
Quadrature Capital Ltd	47,427	$166.0K	0.00%
Brevan Howard Capital Management LP	45,877	$160.6K	0.00%
State of Wisconsin Investment Board	41,400	$144.9K	0.00%
Profund Advisors LLC	16,468	$57.6K	0.00%
Welch & Forbes LLC	15,000	$52.5K	0.00%
Virtu Financial LLC	12,681	$44.0K	0.00%
Strategic Wealth Partners, Ltd.	12,100	$42.4K	0.00%
CIBC Bancorp USA Inc.	10,600	$37.1K	0.00%
Apollon Wealth Management, LLC	10,015	$35.1K	0.00%
Optiver Holding B.V.	1,642	$5.75K	0.00%
Cape Investment Advisory, Inc.	1,317	$4.61K	0.00%
Bessemer Group Inc	526	$2.00K	0.00%
Quadrant Capital Group LLC	405	$1.42K	0.00%
Farther Finance Advisors, LLC	388	$1.36K	0.00%
SRS Capital Advisors, Inc.	225	$787	0.00%
Essential Partners LLC	19	$67	0.00%
Sunbelt Securities, Inc.	8	$28	0.00%
IFP Advisors, Inc	6	$21	0.00%
Clearstead Advisors, LLC	4	$14	0.00%
Allworth Financial LP	4	$14	0.00%

Sold out (10)

Institutions that held Compass Therapeutics, Inc. at the end of Q2 2025 and filed for Q3 2025 without it.

Institutions that sold out of CMPX in Q3 2025
Institution	Shares, Q2 2025	Value, Q2 2025
HRT Financial LP	60,778	$158.0K
American Century Companies Inc	27,607	$71.8K
Marex Group plc	23,600	$61.4K
State Board of Administration of Florida Retirement System	17,730	$46.1K
Two Sigma Investments, LP	16,097	$41.9K
Panagora Asset Management Inc	15,840	$41.2K
Raymond James Financial Inc	4,894	$12.7K
VSM Wealth Advisory, LLC	3,000	$7.80K
Briaud Financial Planning, Inc	700	$1.00K
Skopos Labs, Inc.	236	$614

Not filed for Q3 2025 yet (1)

Institutions that held Compass Therapeutics, Inc. at the end of Q2 2025 and haven't filed a 13F for Q3 2025. Not filing isn't selling, so they aren't counted as sold out.

Institutions holding CMPX in Q2 2025 that haven't filed for Q3 2025
Institution	Shares, Q2 2025	Value, Q2 2025
CIBC World Markets Corp	11,294	$29.4K