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XTX Topco Ltd

Position in SION — Sionna Therapeutics, Inc.

CIK 1828301 LONDON, X0

Position in SION

as of Jun 30, 2026 · filed Aug 14, 2026
Position Value
$1,675,843
+$731,684 QoQ
Shares Held
38,096
+61.8% QoQ
Ownership
0.084%
of shares outstanding
% of Portfolio
0.02%
of 13F equity value
Holder Rank
#67
of 146 holders
Holding Since
Dec 2025
3 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

XTX Topco Ltd holds $414,894,447 across 381 Biotechnology names. SION ranks #78 (0.4% of the industry book) .

# Ticker Company Shares Value (USD) Open

All Filings in SION

Export CSV
3 filing rows on record
Report Date Value (USD) Shares
2026-06-30 $1,675,843 38,096
2026-03-31 $944,159 23,551
2025-12-31 $202,655 4,926