What does CUSIP 20454B104 represent in this 13F holders report?

CUSIP 20454B104 is the security identifier for CMPX - Compass Therapeutics, Inc. - COMMON STOCK used to aggregate holder disclosures.

How many institutions held CMPX - Compass Therapeutics, Inc. - COMMON STOCK in Q1 2026?

199 institutional investors reported CMPX - Compass Therapeutics, Inc. - COMMON STOCK for Q1 2026. Use the holders table for investor-level position and value details.

Compass Therapeutics, Inc. - COMMON STOCK (CMPX)

CUSIP: 20454B104

Q1 2026 13F Holders as of 31 Mar 2026

Security type / class: Equity / COMMON STOCK
Total 13F shares: 173,194,999
Total 13F value: $916,047,475
Share change: +9,321,343
Put/Call ratio: 5.7%
SEC-reported price per share: $5.29
Number of holders: 199
Value change: +$49,018,135
Number of buys: 117
Number of sells: 67
Shares outstanding: 180,975,509

Security key

20454B104

Report period

Q1 2026

Institutions

199

Top holders

CMPX full security history Ownership snapshot Full 13F holder table Newer quarter: Q2 2026 Compass Therapeutics, Inc. SEC filings Compass Therapeutics, Inc. company facts

Broader feeds

Latest 13F filings Latest 13D/G filings Investors directory

Reporting periods

Holder history for CUSIP 20454B104

Newer quarter: Q2 2026

Recent filing periods:

Q2 2026

Ownership snapshot

Top reported holders of CMPX - Compass Therapeutics, Inc. - COMMON STOCK (13F + 13D/G + 3/4/5)

Grouped by holder across the latest SEC ownership disclosures. Start with comparable ownership when available, then verify the linked 13F, 13D/G, or 3/4/5 evidence.

Comparable stake leader

TANG CAPITAL MANAGEMENT LLC

Disclosed value leader

TANG CAPITAL MANAGEMENT LLC

Comparable rows

15/15

Latest evidence

31 Mar 2026

13F 13D/G Lead comparable stake: 10% 13D/G row: TANG CAPITAL MANAGEMENT LLC Showing 1-6 of 15 holder rows.

Quick read

TANG CAPITAL MANAGEMENT LLC leads the comparable SEC ownership view at 10%.

15 of 15 rows have a safely comparable ownership percentage. Use this as a filing-backed starting point, then open the detailed table for source links, reporting role, position value, share count, and filing date.

Open SEC evidence Opens TANG CAPITAL MANAGEMENT LLC's linked filing trail.

Comparable ownership Top 5

TANG CAPITAL MANAGEMENT LLC 10%

ORBIMED ADVISORS LLC 8.9%

SUVRETTA CAPITAL MANAGEMENT, LLC 8.2%

BlackRock, Inc. 5.2%

Vivo Opportunity Fund Holdings, L.P. 5.1%

Ownership % is shown only when SEC disclosures are safely comparable across share classes.

Detailed SEC evidence table Showing 1-6 of 15 holder rows

Holder	Evidence	Ownership %	Position	12M Net Δ	As of
TANG CAPITAL MANAGEMENT LLC	13F 13D/G Company 13F 13D/G	10% from 13D/G	$90,166,644 16,790,809 shares	—	31 Dec 2025
ORBIMED ADVISORS LLC	13F 13D/G Company 13F 13D/G	8.9% from 13D/G	$81,731,368 15,219,994 shares	—	31 Dec 2025
SUVRETTA CAPITAL MANAGEMENT, LLC	13F 13D/G Company 13F 13D/G	8.2% from 13D/G	$76,159,375 14,182,379 shares	—	31 Dec 2025
BlackRock, Inc.	13F 13D/G Company 13F 13D/G	5.2% from 13D/G	$50,416,912 9,388,624 shares	—	31 Dec 2025
Vivo Opportunity Fund Holdings, L.P.	13D/G 13D/G	5.1%	$31,485,926 8,995,979 shares	$0	30 Sep 2025
Commander Aggregator, LP	13D/G 13D/G	4.5%	$24,610,554 7,788,150 shares	$0	14 Aug 2025

How to read this table

Rows are grouped by holder and ranked first by SEC-reported ownership % when it is safely comparable, then by disclosed holdings value. — indicates unavailable or non-comparable values; "mixed-class rows" means the latest filing spans non-comparable classes.

13F holder rows

Institutional holders as of Q1 2026

Investor-level positions for this CUSIP, loaded as an interactive table.

Institutions

199

173,194,999

Rows available

199

Investor	Option	Weight %	Change %	SEC-reported value	* Price	Shares	Share Change	Activity	Report Period

^* SEC-reported price is the security price as of the portfolio date and can indicate the last known price at which the security was still held. The marker flags a reported price that did not pass the local price check.

Compare Q1 2026 vs Q1 2026 Across Filers

Q1 2026 holders

199

Q1 2026 holders

199

Holder diff

Investor	Q1 2026 Shares	Q1 2026 Shares	Share Diff	Share Chg %	Q1 2026 value	Q1 2026 value	Value change	Value Chg %

Trend: ostatnie 8 kwartałów (+ wybrane okresy porównania).

Quarterly Holders Trend

Quarterly Value Trend

Quarterly Shares Trend