Compass Therapeutics CMPX Institutional Ownership

NASDAQ CMPX

$1.10 -0.01 (-1.36%)

As of: Sep 29, 2026 · 3:59 PM EDT

Institutions by Trading Activity

215 Institutions

Increased 150 69.8%

Unchanged 21 9.8%

Reduced 44 20.5%

Ownership Statistics

13F · as of 30 Jun, 2026

Institutional Ownership

88.86%

▼-4.08 pp QoQ

Shares Held by Institutions

165.98Mn

of 186.80Mn outstanding

▲+17.94% QoQ

Shares Outstanding

186.80Mn

20.82Mn held outside 13F filers

Institutional Investors

215

filed 13F for Jun 2026

▲+15 vs prior quarter

Net Shares Added (QoQ)

+25.24Mn

accumulated since last quarter

Value of Holdings

$184.24Mn

reported market value

Shares Owned by Institutions

Shares held % of outstanding

Latest —

Average ownership —

Peak ownership —

Shares Purchased/Sold by Institutions

Accumulated Distributed

Latest quarter —

Net over range —

Accumulating quarters —

Ownership Summary

Quarter ending 30 Jun, 2026

Compass Therapeutics, Inc. (NASDAQ:CMPX) showed up in the 13F filings of 215 institutional investors as of June 2026.

Collectively, these holders controlled 88.9% of Compass Therapeutics's outstanding shares in June 2026, down from 92.9% in March 2026.
They increased total shares held in Compass Therapeutics by 17.94% from last quarter, and the number of investors in CMPX increased 110.78% annually.
Of these 215 funds, 150 grew their exposure to Compass Therapeutics, 44 cut back, and 21 maintained positions.
The aggregate institutional position in Compass Therapeutics amounted to 165.98Mn shares as of June 2026, up by 25.24Mn shares quarter on quarter, and up 57.99Mn shares year over year.
As of June 30, 2026, TANG CAPITAL MANAGEMENT LLC held the largest stake in Compass Therapeutics with 17.99Mn shares, accounting for 9.63% of total shares outstanding.
The largest buyers of Compass Therapeutics for the quarter ending June 2026 were Palo Alto Investors LP (4.32Mn), MILLENNIUM MANAGEMENT LLC (3.87Mn), AQR CAPITAL MANAGEMENT LLC (3.31Mn), State Street Corp (3.26Mn), CITADEL ADVISORS LLC (2.85Mn).
Top sellers of CMPX stock for the quarter ending June 2026 included ADAGE CAPITAL PARTNERS GP, L.L.C. (7.3Mn), Vivo Capital, LLC (1.79Mn), UBS Group AG (1.68Mn), Schonfeld Strategic Advisors LLC (983.78K), Blackstone Inc. (957.91K).
Business Quant data shows the 10 biggest positions in Compass Therapeutics as of June 2026 are held by TANG CAPITAL MANAGEMENT LLC (17.99Mn), ORBIMED ADVISORS LLC (15.22Mn), MONTANOVA CAPITAL, LLC (14.1Mn), BlackRock, Inc. (11.28Mn), State Street Corp (9.95Mn), Enavate Sciences GP, LLC (7.79Mn), Vivo Capital, LLC (7.76Mn), VANGUARD CAPITAL MANAGEMENT LLC (6.12Mn), Palo Alto Investors LP (5.83Mn), MILLENNIUM MANAGEMENT LLC (4.71Mn).

Form 13F Holdings

215 Institutional Holders

Report period 30 Jun, 2026

Total shares held 165.98Mn

Of outstanding 88.86%

#	Institution	CIK	Shares Held	% of Outstanding	Change (QoQ)	Change (%)	Value (USD)
1	TANG CAPITAL MANAGEMENT LLC	0001232621	17,990,782	9.63%	▲1,199,973	+7.15%	$39.40Mn
2	ORBIMED ADVISORS LLC	0001055951	15,219,994	8.15%	0	0.00%	$33.33Mn
3	MONTANOVA CAPITAL, LLC	0001569064	14,101,159	7.55%	▼206,220	-1.44%	$30.88Mn
4	BlackRock, Inc.	0002012383	11,281,781	6.04%	▲1,775,701	+18.68%	$24.71Mn
5	State Street Corp	0000093751	9,953,653	5.33%	▲3,258,677	+48.67%	$21.80Mn
6	Enavate Sciences GP, LLC	0001953107	7,788,150	4.17%	0	0.00%	$17.06Mn
7	Vivo Capital, LLC	0001674712	7,757,060	4.15%	▼1,788,406	-18.74%	$16.99Mn
8	VANGUARD CAPITAL MANAGEMENT LLC	0002100119	6,118,782	3.28%	▲81,607	+1.35%	$13.40Mn
9	Palo Alto Investors LP	0001306923	5,831,813	3.12%	▲4,317,309	+285.06%	$12.77Mn
10	MILLENNIUM MANAGEMENT LLC	0001273087	4,713,247	2.52%	▲3,867,027	+456.98%	$10.32Mn
11	GEODE CAPITAL MANAGEMENT, LLC	0001214717	3,815,189	2.04%	▲249,419	+6.99%	$8.36Mn
12	VANGUARD PORTFOLIO MANAGEMENT LLC	0002100121	3,771,032	2.02%	▲2,688,381	+248.31%	$8.26Mn
13	Qube Research & Technologies Ltd	0001729829	3,687,489	1.97%	▲1,137,133	+44.59%	$8.08Mn
14	Blue Owl Capital Holdings LP	0001858703	3,624,076	1.94%	▲682,551	+23.20%	$7.94Mn
15	CITADEL ADVISORS LLC	0001423053	3,570,674	1.91%	▲2,849,264	+394.96%	$7.82Mn
16	Goldman Sachs Group Inc	0000886982	3,531,000	1.89%	▲1,535,606	+76.96%	$7.73Mn
17	Rock Springs Capital Management LP	0001595725	3,524,929	1.89%	▲219,621	+6.64%	$7.72Mn
18	AQR CAPITAL MANAGEMENT LLC	0001167557	3,509,137	1.88%	▲3,308,709	+1,650.82%	$7.69Mn
19	Birchview Capital, LP	0001618205	1,675,000	0.90%	▲209,133	+14.27%	$3.67Mn
20	KINGDON CAPITAL MANAGEMENT, L.L.C.	0001000097	1,400,000	0.75%	▲1,400,000	0.00%	$3.07Mn

Showing 1 to 20 of 215 holders