Rhenman & Partners Asset Management AB
Position in SION — Sionna Therapeutics, Inc.
CIK 1599882
Stockholm, V7
Position in SION
as of Mar 31, 2026
· filed May 14, 2026
Position Value
$3,507,875
New position
Shares Held
87,500
first reported quarter
Ownership
0.194%
of shares outstanding
% of Portfolio
0.44%
of 13F equity value
Holder Rank
—
not a current holder
Holding Since
Mar 2026
1 quarter on record
Voting authority
Sole 100%
Shared 0%
None 0%
Position in Biotechnology
Healthcare · as of Mar 31, 2026Rhenman & Partners Asset Management AB holds $297,378,771 across 37 Biotechnology names. SION ranks #29 (1.2% of the industry book) .
| # | Ticker | Company | Shares | Value (USD) | Open |
|---|---|---|---|---|---|
| 1 | REGN |
Regeneron Pharmaceuticals, Inc.
|
48,100 | $37,163,984 | |
| 2 | INSM |
INSMED Inc
|
159,760 | $26,123,955 | |
| 3 | VRTX |
Vertex Pharmaceuticals Inc / Ma
|
43,485 | $19,417,791 | |
| 4 | JAZZ |
Jazz Pharmaceuticals plc
|
75,890 | $14,347,004 | |
| 5 | MDGL |
Madrigal Pharmaceuticals, Inc.
|
24,050 | $12,589,453 | |
| 6 | BMRN |
Biomarin Pharmaceutical Inc
|
207,000 | $11,693,430 | |
| 7 | ALNY |
Alnylam Pharmaceuticals, Inc.
|
34,465 | $11,403,434 | |
| 8 | RPRX |
Royalty Pharma plc
|
233,000 | $11,177,010 |
All Filings in SION
Export CSV
1 filing row on record
| Report Date | Value (USD) | Shares | Type | Discretion | Filed | |
|---|---|---|---|---|---|---|
| 2026-03-31 | $3,507,875 | 87,500 | Shares | Sole | 2026-05-14 | |
| No filing history on record for this holder in this stock. | ||||||