Latest Period
Q1 2026
Security Snapshot
Compass Therapeutics, Inc. - Common Stock, $0.0001 par value per share (CMPX) Institutional Ownership
CUSIP: 20454B104
13F Institutional Holders and Ownership History from Q4 2021 to Q1 2026
Institutions Reporting
198
Shares (Excl. Options)
173,194,998
Price
$5.29
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- Security type / class
- Equity / Common Stock, $0.0001 par value per share
- Symbol
- CMPX on Nasdaq
- All holders as of 31 Mar 2026
- Q1 2026
- Total 13F shares
- 173,194,998
- Total 13F value
- $916,047,470
- Portfolio coverage rank
- 0%
- Share change
- +9,321,342
- Value change
- +$49,018,130
- Number of holders
- 198
- Shares outstanding
- 180,577,721
- SEC-reported price per share
- $1.97
- Insider filing price
- $1.97
Latest holder snapshot
5 signals
Issuer context
Names, identifiers, and filing context for this profile.
3 identity fields
13F Shares, Excluding Options vs Price
13F Value, Excluding Options
Total Investors
Key facts
- CMPX - Compass Therapeutics, Inc. - Common Stock, $0.0001 par value per share is tracked under CUSIP 20454B104.
- 198 institutions reported positions in Q1 2026.
- 10 significant owners is listed from Schedule 13D/13G reporting.
Change
- Holder count moved from 174 to 198 between Q4 2025 and Q1 2026.
- SEC-reported value moved from $881,588,986 to $916,047,470.
Research use
- You can quickly see who holds this security, then open quarter and manager detail pages for full evidence.
- 13F and Schedule 13D/13G sections are kept together so you can cross-check institutional and beneficial ownership context.
Evidence
Source: SEC Form 13F
Open SEC evidence
Latest holder context comes from 198 institutions filings for Q1 2026.
Security key
20454B104
Latest holder period
Q1 2026
13F holders
198
13D/G owners
10
CIK / CUSIP context first
Open Q1 2026 holders
CMPX full holder history
Compass Therapeutics, Inc. SEC filings
Compass Therapeutics, Inc. company facts
Compass Therapeutics, Inc. insider transactions
Broader feeds
Recent Quarterly Holder Reports
Open recent reporting periods for CUSIP 20454B104:
13D/G owners
Significant owners
Large-stake holder rows connected to Schedule 13D/G evidence.
Rows
10
Security
CMPX
| Filer | Ownership | Change % | Holdings Value | Net Change | Nb Shares | Change % | Reporting Name | Report Period |
|---|---|---|---|---|---|---|---|---|
| TANG CAPITAL MANAGEMENT LLC | 10% | +1.9% | $60,117,785 | +$12,881,057 | 17,176,510 | +27% | TANG CAPITAL MANAGEMENT, LLC | 30 Sep 2025 |
| ORBIMED ADVISORS LLC | 8.9% | -19% | $41,093,984 | 15,219,994 | 0% | ORBIMED ADVISORS LLC | 13 Aug 2025 | |
| SUVRETTA CAPITAL MANAGEMENT, LLC | 8.2% | +60% | $44,559,662 | +$21,967,265 | 14,101,159 | +97% | Suvretta Capital Management, LLC | 13 Aug 2025 |
| BlackRock, Inc. | 5.2% | +12% | $49,788,728 | +$15,426,163 | 9,271,644 | +45% | BlackRock, Inc. | 31 Dec 2025 |
| Vivo Opportunity Fund Holdings, L.P. | 5.1% | $31,485,926 | 8,995,979 | Vivo Opportunity Fund Holdings, L.P. | 30 Sep 2025 | |||
| Commander Aggregator, LP | 4.5% | $24,610,554 | 7,788,150 | Commander Aggregator, LP | 14 Aug 2025 | |||
| BIOTECHNOLOGY VALUE FUND L P | 4.3% | -16% | $41,076,014 | -$5,211,486 | 7,764,842 | -11% | BVF PARTNERS L P/IL | 31 Mar 2026 |
| Blackstone Holdings II L.P. | 3.4% | $31,917,408 | 6,126,182 | Blackstone Alternative Asset Management Associates LLC | 31 Dec 2025 | |||
| ADAGE CAPITAL PARTNERS GP, L.L.C. | 4.4% | $11,629,931 | 5,994,810 | Adage Capital Management, L.P. | 31 Dec 2024 | |||
| MPM BioImpact LLC | 4.1% | -35% | $15,180,764 | -$7,952,556 | 5,622,505 | -34% | MPM BioImpact LLC | 30 Jun 2025 |
As of 31 Mar 2026, 198 institutional investors reported holding 173,194,998 shares of Compass Therapeutics, Inc. - Common Stock, $0.0001 par value per share (CMPX). This represents 96% of the company’s total 180,577,721 outstanding shares.
13F concentration
Top 25 institutional shareholders
Largest 13F positions for this security by reported shares and value.
Top holder share
78%
| Institution | Ownership % | Shares Held | Share Change % | Portfolio % | Holdings Value |
|---|---|---|---|---|---|
| TANG CAPITAL MANAGEMENT LLC | 9.3% | 16,790,809 | 0% | 4.5% | $88,823,380 |
| ORBIMED ADVISORS LLC | 8.4% | 15,219,994 | 0% | 1.8% | $80,513,768 |
| SUVRETTA CAPITAL MANAGEMENT, LLC | 7.9% | 14,307,379 | +0.88% | 2.1% | $75,686,035 |
| Vivo Capital, LLC | 5.3% | 9,545,466 | 0% | 4.2% | $50,495,515 |
| BlackRock, Inc. | 5.3% | 9,506,080 | +1.3% | 0% | $50,287,163 |
| ADAGE CAPITAL PARTNERS GP, L.L.C. | 4.7% | 8,486,500 | +91% | 0.07% | $44,893,585 |
| ENAVATE SCIENCES GP, LLC | 4.3% | 7,788,150 | 0% | 12% | $41,199,314 |
| BVF INC/IL | 4.3% | 7,764,842 | 0% | 1.3% | $41,076,014 |
| STATE STREET CORP | 3.7% | 6,694,976 | +37% | 0% | $35,416,423 |
| VANGUARD CAPITAL MANAGEMENT LLC | 3.3% | 6,037,175 | 0% | 0% | $31,936,656 |
| RTW INVESTMENTS, LP | 2.3% | 4,186,599 | +67% | 0.22% | $22,147,109 |
| DEERFIELD MANAGEMENT COMPANY, L.P. | 2% | 3,606,000 | 0% | 0.23% | $19,075,740 |
| GEODE CAPITAL MANAGEMENT, LLC | 2% | 3,565,770 | +1.8% | 0% | $18,867,863 |
| Rock Springs Capital Management LP | 1.8% | 3,305,308 | -16% | 1% | $17,485,079 |
| Logos Global Management LP | 1.7% | 3,150,000 | +174% | 0.86% | $16,663,500 |
| Blue Owl Capital Holdings LP | 1.6% | 2,941,525 | -15% | 4.2% | $15,560,667 |
| Qube Research & Technologies Ltd | 1.4% | 2,550,356 | +477% | 0.02% | $13,491,383 |
| UBS Group AG | 1.3% | 2,391,333 | +1325% | 0% | $12,650,151 |
| Sofinnova Investments, Inc. | 1.1% | 2,056,161 | -39% | 0.54% | $10,877,092 |
| GOLDMAN SACHS GROUP INC | 1.1% | 1,995,394 | +31% | 0% | $10,555,635 |
| BRAIDWELL LP | 1.1% | 1,965,106 | -29% | 0.35% | $10,395,411 |
| Blackstone Inc. | 1% | 1,857,848 | -70% | 0.04% | $9,828,016 |
| FMR LLC | 1% | 1,801,721 | -30% | 0% | $9,531,104 |
| ROYCE & ASSOCIATES LP | 0.9% | 1,619,798 | +466% | 0.08% | $8,568,731 |
| AMERIPRISE FINANCIAL INC | 0.88% | 1,596,815 | +94% | 0% | $8,447,151 |
Quarter history
Institutional holders across reporting periods
Holder count, reported shares/value, and median price by quarter.
Periods
18
Latest
Q1 2026
Rows shown
1-18 of 18
| Period | 13F Shares, Excl. Options | Value, Excl. Options | Value Change | Price (Median) | Investors |
|---|---|---|---|---|---|
| 2026 Q1 | 173,194,998 | $916,047,470 | +$49,018,130 | $5.29 | 198 |
| 2025 Q4 | 164,168,134 | $881,588,986 | +$65,007,494 | $5.37 | 174 |
| 2025 Q3 | 151,052,849 | $528,694,287 | +$149,920,554 | $3.50 | 124 |
| 2025 Q2 | 108,253,035 | $281,458,749 | +$738,261 | $2.60 | 103 |
| 2025 Q1 | 108,444,414 | $206,047,938 | +$13,824,994 | $1.90 | 107 |
| 2024 Q4 | 101,374,021 | $146,996,022 | +$1,180,763 | $1.45 | 92 |
| 2024 Q3 | 92,186,861 | $169,597,729 | +$881,089 | $1.84 | 79 |
| 2024 Q2 | 92,861,661 | $93,412,908 | -$5,271,746 | $1.00 | 81 |
| 2024 Q1 | 94,552,324 | $187,180,490 | +$18,089,983 | $1.98 | 77 |
| 2023 Q4 | 86,111,898 | $134,344,397 | -$2,317,455 | $1.56 | 76 |
| 2023 Q3 | 89,720,729 | $176,712,745 | -$1,697,948 | $1.97 | 76 |
| 2023 Q2 | 90,478,972 | $287,651,504 | +$28,216,829 | $3.18 | 72 |
| 2023 Q1 | 81,516,748 | $266,518,963 | +$1,871,389 | $3.27 | 72 |
| 2022 Q4 | 79,833,267 | $401,391,571 | +$78,919,542 | $5.03 | 54 |
| 2022 Q3 | 63,858,418 | $145,631,000 | +$3,917,942 | $2.28 | 36 |
| 2022 Q2 | 61,892,616 | $163,922,000 | +$665,806 | $2.65 | 31 |
| 2022 Q1 | 62,376,106 | $85,353,000 | -$4,074,753 | $1.37 | 33 |
| 2021 Q4 | 63,567,962 | $201,611,000 | +$198,091,000 | $3.17 | 37 |