Position in SION
as of Mar 31, 2026
· filed May 15, 2026
Position Value
$397,093,254
-$10,400,297 QoQ
Shares Held
9,905,045
0.0% QoQ
Ownership
21.9%
of shares outstanding
% of Portfolio
4.21%
of 13F equity value
Holder Rank
#1
of 121 holders
Holding Since
Mar 2025
5 quarters on record
Voting authority
Sole 100.ToString("F0")%
Shared 0.ToString("F0")%
None 0.ToString("F0")%
Common Shares in SION Over Time
Shares Held
Position Value (USD)
Position in Biotechnology
Healthcare · as of Mar 31, 2026RA CAPITAL MANAGEMENT, L.P. holds $9,134,713,488 across 74 Biotechnology names. SION ranks #5 (4.3% of the industry book) .
| # | Ticker | Company | Shares | Value (USD) | Open |
|---|---|---|---|---|---|
| 1 | ASND |
Ascendis Pharma A/S
|
10,281,496 | $2,351,686,580 | |
| 2 | PCVX |
Vaxcyte, Inc.
|
11,474,599 | $666,788,947 | |
| 3 | RYTM |
Rhythm Pharmaceuticals, Inc.
|
6,666,837 | $579,814,813 | |
| 4 | TYRA |
Tyra Biosciences, Inc.
|
12,198,625 | $467,207,337 | |
| 5 | SION |
Sionna Therapeutics, Inc.
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|
9,905,045 | $397,093,254 | |
| 6 | EWTX |
Edgewise Therapeutics, Inc.
|
10,428,437 | $328,495,765 | |
| 7 | NAMS |
NewAmsterdam Pharma Co N.V.
|
9,550,191 | $305,701,613 | |
| 8 | NUVL |
Nuvalent, Inc.
|
2,534,145 | $259,623,155 |
All Filings in SION
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7 filing rows on record
| Report Date | Value (USD) | Shares | Type | Discretion | Filed | |
|---|---|---|---|---|---|---|
| 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. | ||||||