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Equibles

Driehaus Capital Management LLC

Position in SION — Sionna Therapeutics, Inc.

CIK 938206 Chicago, IL
Back to SION Full portfolio

Position in SION

as of Jun 30, 2026 · filed Aug 14, 2026
Position Value
$16,955,813
+$13,883,597 QoQ
Shares Held
385,447
+403.0% QoQ
Ownership
0.853%
of shares outstanding
% of Portfolio
0.10%
of 13F equity value
Holder Rank
#23
of 146 holders
Holding Since
Mar 2025
6 quarters on record
Voting authority Sole 83% Shared 0% None 17%

Common Shares in SION Over Time

Shares Held

Position Value (USD)

Position in Biotechnology

Healthcare · as of Jun 30, 2026

Driehaus Capital Management LLC holds $3,707,249,767 across 60 Biotechnology names. SION ranks #36 (0.5% of the industry book) .

# Ticker Company Shares Value (USD) Open
1 DFTX
Definium Therapeutics, Inc.
 6,845,276 $322,001,783
2 PRAX
Praxis Precision Medicines, Inc.
 959,048 $321,079,679
3 XENE
Xenon Pharmaceuticals Inc.
 4,418,557 $266,704,100
4 SYRE
Spyre Therapeutics, Inc.
 2,799,166 $248,509,957
5 CRNX
Crinetics Pharmaceuticals, Inc.
 6,463,551 $241,866,078
6 APGE
Apogee Therapeutics, Inc.
 1,740,101 $230,963,605
7 EWTX
Edgewise Therapeutics, Inc.
 4,728,623 $192,123,952
8 SEPN
Septerna, Inc.
 4,433,058 $148,463,112

All Filings in SION

Export CSV
6 filing rows on record
Report Date Value (USD) Shares
2026-06-30 $16,955,813 385,447
2026-03-31 $3,072,216 76,633
2025-12-31 $3,449,589 83,850
2025-09-30 $2,466,028 83,850
2025-06-30 $1,454,797 83,850
2025-03-31 $3,440,178 328,889