Rock Springs Capital Management LP
Position in CMPX — Compass Therapeutics, Inc.
CIK 1595725
Baltimore, MD
Position in CMPX
as of Jun 30, 2026
· filed Aug 14, 2026
Position Value
$7,719,594
-$9,765,485 QoQ
Shares Held
3,524,929
+6.6% QoQ
Ownership
1.96%
of shares outstanding
% of Portfolio
0.38%
of 13F equity value
Holder Rank
#17
of 213 holders
Holding Since
Dec 2021
19 quarters on record
Voting authority
Sole 100%
Shared 0%
None 0%
Common Shares in CMPX Over Time
Shares Held
Position Value (USD)
Position in Biotechnology
Healthcare · as of Jun 30, 2026Rock Springs Capital Management LP holds $1,502,002,537 across 70 Biotechnology names. CMPX ranks #41 (0.5% of the industry book) .
| # | Ticker | Company | Shares | Value (USD) | Open |
|---|---|---|---|---|---|
| 1 | RVMD |
Revolution Medicines, Inc.
|
1,105,210 | $206,983,728 | |
| 2 | TVTX |
Travere Therapeutics, Inc.
|
2,179,069 | $123,792,909 | |
| 3 | MDGL |
Madrigal Pharmaceuticals, Inc.
|
174,999 | $93,965,713 | |
| 4 | MIRM |
Mirum Pharmaceuticals, Inc.
|
798,145 | $93,438,835 | |
| 5 | RYTM |
Rhythm Pharmaceuticals, Inc.
|
692,598 | $76,899,155 | |
| 6 | KYMR |
Kymera Therapeutics, Inc.
|
453,156 | $51,963,398 | |
| 7 | ARGX |
Argenx SE
|
52,750 | $48,939,867 | |
| 8 | ASND |
Ascendis Pharma A/S
|
168,750 | $45,009,000 |
All Filings in CMPX
Export CSV
19 filing rows on record
| Report Date | Value (USD) | Shares | Type | Discretion | Filed | |
|---|---|---|---|---|---|---|
| 2026-06-30 | $7,719,594 | 3,524,929 | Shares | Sole | 2026-08-14 | |
| 2026-03-31 | $17,485,079 | 3,305,308 | Shares | Sole | 2026-05-15 | |
| 2025-12-31 | $21,089,074 | 3,927,202 | Shares | Sole | 2026-02-17 | |
| 2025-09-30 | $15,661,457 | 4,474,702 | Shares | Sole | 2025-11-14 | |
| 2025-06-30 | $12,903,683 | 4,962,955 | Shares | Sole | 2025-08-14 | |
| 2025-03-31 | $9,429,614 | 4,962,955 | Shares | Sole | 2025-05-15 | |
| 2024-12-31 | $8,380,383 | 5,779,575 | Shares | Sole | 2025-02-14 | |
| 2024-09-30 | $10,357,799 | 5,629,239 | Shares | Sole | 2024-11-14 | |
| 2024-06-30 | $5,513,788 | 5,513,788 | Shares | Sole | 2024-08-14 | |
| 2024-03-31 | $10,917,300 | 5,513,788 | Shares | Sole | 2024-05-15 | |
| 2023-12-31 | $8,601,509 | 5,513,788 | Shares | Sole | 2024-02-14 | |
| 2023-09-30 | $10,862,162 | 5,513,788 | Shares | Sole | 2023-11-14 | |
| 2023-06-30 | $17,533,845 | 5,513,788 | Shares | Sole | 2023-08-14 | |
| 2023-03-31 | $18,030,086 | 5,513,788 | Shares | Sole | 2023-05-15 | |
| 2022-12-31 | $26,825,935 | 5,333,188 | Shares | Sole | 2023-02-14 | |
| 2022-09-30 | $12,159,668 | 5,333,188 | Shares | Sole | 2022-11-14 | |
| 2022-06-30 | $14,119,433 | 5,328,088 | Shares | Sole | 2022-08-15 | |
| 2022-03-31 | $7,299,480 | 5,328,088 | Shares | Sole | 2022-05-16 | |
| 2021-12-31 | $16,890,038 | 5,328,088 | Shares | Sole | 2022-02-14 | |
| No filing history on record for this holder in this stock. | ||||||