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Equibles

DEERFIELD MANAGEMENT COMPANY, L.P.

Position in SION — Sionna Therapeutics, Inc.

CIK 1009258 NEW YORK, NY
Back to SION Full portfolio

Position in SION

as of Jun 30, 2026 · filed Aug 14, 2026
Position Value
$29,953,494
-$8,957,459 QoQ
Shares Held
680,916
-29.8% QoQ
Ownership
1.51%
of shares outstanding
% of Portfolio
0.51%
of 13F equity value
Holder Rank
#15
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

DEERFIELD MANAGEMENT COMPANY, L.P. holds $3,763,549,987 across 45 Biotechnology names. SION ranks #30 (0.8% of the industry book) .

# Ticker Company Shares Value (USD) Open
1 RVMD
Revolution Medicines, Inc.
 2,392,000 $447,973,760
2 PRAX
Praxis Precision Medicines, Inc.
 963,351 $322,520,281
3 LEGN
Legend Biotech Corp
 8,137,638 $235,014,985
4 COGT
Cogent Biosciences, Inc.
 5,006,104 $193,736,224
5 GMAB
Genmab A/S
 6,865,000 $188,581,550
6 VERA
Vera Therapeutics, Inc.
 3,916,400 $168,052,724
7 IONS
Ionis Pharmaceuticals Inc
 1,979,669 $156,967,955
8 CELC
Celcuity Inc.
 1,451,014 $151,805,084

All Filings in SION

Export CSV
6 filing rows on record
Report Date Value (USD) Shares
2026-06-30 $29,953,494 680,916
2026-03-31 $38,910,953 970,590
2025-12-31 $39,930,072 970,590
2025-09-30 $28,545,051 970,590
2025-06-30 $16,839,736 970,590
2025-03-31 $7,813,620 747,000