Position in SION
as of Jun 30, 2026
· filed Aug 14, 2026
Position Value
$435,722,929
+$38,629,675 QoQ
Shares Held
9,905,045
0.0% QoQ
Ownership
21.9%
of shares outstanding
% of Portfolio
3.84%
of 13F equity value
Holder Rank
#1
of 146 holders
Holding Since
Mar 2025
6 quarters on record
Voting authority
Sole 100%
Shared 0%
None 0%
Common Shares in SION Over Time
Shares Held
Position Value (USD)
Position in Biotechnology
Healthcare · as of Jun 30, 2026RA CAPITAL MANAGEMENT, L.P. holds $11,082,969,028 across 75 Biotechnology names. SION ranks #5 (3.9% of the industry book) .
| # | Ticker | Company | Shares | Value (USD) | Open |
|---|---|---|---|---|---|
| 1 | ASND |
Ascendis Pharma A/S
|
10,281,496 | $2,742,280,613 | |
| 2 | PBLS |
Parabilis Medicines, Inc.
|
28,933,371 | $791,906,364 | |
| 3 | RYTM |
Rhythm Pharmaceuticals, Inc.
|
6,666,837 | $740,218,912 | |
| 4 | PCVX |
Vaxcyte, Inc.
|
11,474,599 | $667,018,439 | |
| 5 | SION |
Sionna Therapeutics, Inc.
This page
|
9,905,045 | $435,722,929 | |
| 6 | TYRA |
Tyra Biosciences, Inc.
|
12,198,625 | $389,624,082 | |
| 7 | EWTX |
Edgewise Therapeutics, Inc.
|
8,392,730 | $340,996,619 | |
| 8 | NAMS |
NewAmsterdam Pharma Co N.V.
|
9,883,524 | $330,779,298 |
All Filings in SION
Export CSV
8 filing rows on record
| Report Date | Value (USD) | Shares | Type | Discretion | Filed | |
|---|---|---|---|---|---|---|
| 2026-06-30 | $435,722,929 | 9,905,045 | Shares | Sole | 2026-08-14 | |
| 2026-03-31 | $397,093,254 | 9,905,045 | Shares | Sole | 2026-05-15 | |
| 2025-12-31 | $407,493,551 | 9,905,045 | Shares | Sole | 2026-02-17 | |
| 2025-11-05 | $353,315,656 | 10,071,712 | Shares | Sole | 2025-11-07 | |
| 2025-09-30 | $307,196,920 | 10,445,322 | Shares | Sole | 2025-11-14 | |
| 2025-06-30 | $181,226,336 | 10,445,322 | Shares | Sole | 2025-08-14 | |
| 2025-03-31 | $109,258,068 | 10,445,322 | Shares | Sole | 2025-05-15 | |
| 2025-02-10 | $232,303,961 | 10,445,322 | Shares | Sole | 2025-02-18 | |
| No filing history on record for this holder in this stock. | ||||||