Security key
20454B104
COMPASS THERAPEUTICS INC - COMMON STOCK (CMPX)
CUSIP: 20454B104
Q3 2025 13F Holders as of 30 Sep 2025
- Security type / class
- Equity / COMMON STOCK
- Total 13F shares
- 151,052,849
- Total 13F value
- $528,694,287
- Share change
- +42,790,470
- Put/Call ratio
- 0%
- SEC-reported price per share
- $3.50
- Number of holders
- 124
- Value change
- +$149,920,554
- Number of buys
- 73
- Number of sells
- 41
- Shares outstanding
- 180,975,509
Holder snapshot
7 signals
Open additional details 1 more signal available
Security identity
Names, identifiers, and filing context for this profile.
1 source field
Report period
Q3 2025
Institutions
124
Top holders
10
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
Reporting periods
Holder history for CUSIP 20454B104
Recent filing periods:
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
30 Sep 2025
13D/G
13F
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%
Vivo Opportunity Fund Holdings, L.P.
5.1%
Commander Aggregator, LP
4.5%
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 |
13D/G
13F
Company
|
10%
|
$60,117,785
17,176,510 shares
|
+$12,881,057 | 30 Sep 2025 |
| ORBIMED ADVISORS LLC |
13D/G
13F
Company
|
8.9%
|
$41,093,984
15,219,994 shares
|
$0 | 13 Aug 2025 |
| SUVRETTA CAPITAL MANAGEMENT, LLC |
13D/G
13F
Company
|
8.2%
|
$44,559,662
14,101,159 shares
|
+$21,967,265 | 13 Aug 2025 |
| Vivo Opportunity Fund Holdings, L.P. |
13D/G
|
5.1%
|
$31,485,926
8,995,979 shares
|
$0 | 30 Sep 2025 |
| Commander Aggregator, LP |
13D/G
|
4.5%
|
$24,610,554
7,788,150 shares
|
$0 | 14 Aug 2025 |
| ADAGE CAPITAL PARTNERS GP, L.L.C. |
13D/G
13F
Adage Capital Management, L.P. · Company
|
4.4%
|
$11,629,931
5,994,810 shares
|
$0 | 31 Dec 2024 |
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 Q3 2025
Investor-level positions for this CUSIP, loaded as an interactive table.
Institutions
124
Shares
151,052,849
Rows available
124
| 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 Q3 2025 vs Q2 2025 Across Filers
Q2 2025 holders
103
Q3 2025 holders
124
Holder diff
21
| Investor | Q2 2025 Shares | Q3 2025 Shares | Share Diff | Share Chg % | Q2 2025 value | Q3 2025 value | Value change | Value Chg % |
|---|
Trend: ostatnie 8 kwartałów (+ wybrane okresy porównania).
Quarterly Holders Trend
Quarterly Value Trend
Quarterly Shares Trend