$CMPX

$0.75 -$0.01 (1.81%) Close

$CMPX Overview Financial Statements SEC Filings Executives News Red Flags Capital Raising Ownership Insider Transactions Congressional Trades

Ownership

13F as of Q2 2026 · 180.1M shares outstanding

Who owns CMPX?

By type of holder

Institutions 100.0% Insiders 0.0% Everyone else 0.0%

Concentration Top 10 holders own 147.9%

Gordon Carl L 81.0% · Tang Capital Management LLC 12.8%

Institutional ownership

100.0%

0 pts vs last qtr

Institutional holders

357

+43 vs last qtr

Net shares bought

−10.2M

by institutions in Q2 2026

New / sold out

100 / 57

positions opened vs closed

How is ownership changing?

Institutions, last 8 quarters

Biggest buyers in Q2 2026

Palo Alto Investors LP +4.3M
Citadel Advisors LLC +3.6M

Biggest sellers in Q2 2026

BVF Inc/il SOLD OUT −7.8M
Adage Capital Partners GP, L.L.C. −7.3M

Who is planning to sell?

No insider has filed a notice of proposed sale (Form 144) for Compass Therapeutics Inc. in the last 12 months.

Is your stake being diluted?

There are not yet two fiscal years of reported share counts for Compass Therapeutics Inc..

How patient are the owners?

Institutional shares by how long they've been held

5+ years5% 3–5 years34% 1–3 years35% Under 1 year25%

Quarterly turnover

23.8%

of institutional shares changed hands

Top 10 managers, median time held

1.8 years

Super Investors

Investment managers reporting CMPX on Form 13F

Holder	Shares	% of company	Change vs last qtr	Held since	% of their book
TC Tang Capital Management LLC	23.0M	12.77%	+2.2M (+10.6%)	2024	5.0%
Shares held by quarter Peak holding23.0M (Q2'26) Change over 8 quarters+21.2M Share of the company12.770% Tang Capital Management LLC's full portfolio →
OA Orbimed Advisors LLC 13D · 8.9%	15.2M	8.45%	−1.2M (−7.0%)	2021	0.6%
Shares held by quarter Peak holding22.4M (Q3'24) Change over 8 quarters−7.1M Share of the company8.450% Disclosed stake13D · 8.9% Orbimed Advisors LLC's full portfolio →

Tang Capital Management LLC

23.0M

% of company

12.77%

Change vs last qtr

+2.2M (+10.6%)

Held since

2024

Orbimed Advisors LLC

13D · 8.9%

15.2M

% of company

8.45%

Change vs last qtr

−1.2M (−7.0%)

Held since

2021

28 more super investors behind a free account

See every manager holding Compass Therapeutics Inc., how their position has changed, and how long they've held it.

Institutional Funds

Mutual funds and ETFs reporting CMPX on Form N-PORT; together they hold 23.9% of the company

Fund	Position value	Shares	% of company	% of the fund	As of
AG ARK Genomic Revolution ETF ARK ETF Trust	$50.7M	4.5M	2.48%	3.25%	July 31, 2026
SS State Street(R) SPDR(R) S&P(R) Biotech ETF SPDR Series Trust	$15M	6.8M	3.80%	0.14%	June 30, 2026

ARK Genomic Revolution ETF

ARK ETF Trust

Position value

$50.7M

% of company

2.48%

% of the fund

3.25%

As of

July 31, 2026

State Street(R) SPDR(R) S&P(R) Biotech ETF

SPDR Series Trust

Position value

$15M

% of company

3.80%

% of the fund

0.14%

As of

June 30, 2026

23 more funds behind a free account

See every fund holding Compass Therapeutics Inc. and how much of the fund the position is.

Insiders and 5%+ holders

From Forms 3/4/5 and Schedules 13D/G

Holder	Shares	% of company	Change vs last qtr	8 quarters	Held since	% of their book
GC Gordon Carl L Insider	145.9M	81.04%	—	—	—	—
Insider holdings come from Form 3/4/5 filings, which are not quarterly. Share of the company81.040% Gordon Carl L's insider activity →
OC Orbimed Capital GP V LLC 5%+ holder 13D · 8.9%	15.2M	8.45%	—	—	—	—
This holder reports through Schedule 13D/G, not a quarterly 13F. Share of the company8.450% Disclosed stake13D · 8.9% View the 13D/G filing →

Gordon Carl L

Insider

145.9M

% of company

81.04%

Change vs last qtr

—

Held since

—

Orbimed Capital GP V LLC

5%+ holder13D · 8.9%

15.2M

% of company

8.45%

Change vs last qtr

—

Held since

—

6 more holders behind a free account

See every insider and 5%+ holder of Compass Therapeutics Inc..

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