Position history for RA CAPITAL MANAGEMENT, L.P.'s holdings in SIONNA THERAPEUTICS INC
RA CAPITAL MANAGEMENT, L.P. holds 9.9M shares of SION (SIONNA THERAPEUTICS INC), worth $397.1M as of 2026-Q1. SION represents 4.2% of RA CAPITAL MANAGEMENT, L.P.'s portfolio.
Current Value
$397.1M
Current Shares
9.9M
Total Value Change
+$287.8M
Total Shares Change
-540,277
Other major holders of SION: VIKING GLOBAL INVESTORS LP, JPMORGAN CHASE & CO, JENNISON ASSOCIATES LLC
Unchanged |
| 9.9M |
0.0% |
| $397.1M |
| 4.2% |
| $34.09 |
0 |
| 2025-Q4 | Decreased | 9.9M | -5.2% | $407.5M | 4.2% | $41.39 | 0 |
| 2025-Q3 | Unchanged | 10.4M | 0.0% | $307.2M | 3.8% | $29.52 | 0 |
| 2025-Q2 | Unchanged | 10.4M | 0.0% | $181.2M | 3.1% | $15.84 | 0 |
| 2025-Q1 | New | 10.4M | - | $109.3M | 1.8% | $11.56 | 69 |