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Equibles

Alyeska Investment Group, L.P.

Position in SION — Sionna Therapeutics, Inc.

CIK 1453072 CHICAGO, IL
Back to SION Full portfolio

Position in SION

as of Jun 30, 2026 · filed Aug 14, 2026
Position Value
$5,992,405
+$531,266 QoQ
Shares Held
136,222
0.0% QoQ
Ownership
0.301%
of shares outstanding
% of Portfolio
0.02%
of 13F equity value
Holder Rank
#39
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, 2026

Alyeska Investment Group, L.P. holds $989,063,778 across 83 Biotechnology names. SION ranks #36 (0.6% of the industry book) .

# Ticker Company Shares Value (USD) Open
1 RVMD
Revolution Medicines, Inc.
 659,279 $123,469,771
2 IONS
Ionis Pharmaceuticals Inc
 1,417,916 $112,426,559
3 PTGX
Protagonist Therapeutics, Inc
 889,298 $109,010,148
4 XENE
Xenon Pharmaceuticals Inc.
 697,692 $42,112,689
5 MRNA
Moderna, Inc.
 560,819 $39,274,154
6 KYMR
Kymera Therapeutics, Inc.
 276,455 $31,701,094
7 LBRX
Lb Pharmaceuticals Inc
 863,947 $28,039,399
8 PRAX
Praxis Precision Medicines, Inc.
 80,846 $27,066,432

All Filings in SION

Export CSV
6 filing rows on record
Report Date Value (USD) Shares
2026-06-30 $5,992,405 136,222
2026-03-31 $5,461,139 136,222
2025-12-31 $5,604,173 136,222
2025-09-30 $5,476,789 186,222
2025-06-30 $3,230,951 186,222
2025-03-31 $1,947,882 186,222