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RHUMBLINE ADVISERS

Position in SION — Sionna Therapeutics, Inc.

CIK 1115418 BOSTON, MA

Position in SION

as of Jun 30, 2026 · filed Aug 12, 2026
Position Value
$981,372
+$247,405 QoQ
Shares Held
22,309
+21.9% QoQ
Ownership
0.049%
of shares outstanding
% of Portfolio
0.00%
of 13F equity value
Holder Rank
#78
of 146 holders
Holding Since
Jun 2025
5 quarters on record
Voting authority Sole 22% Shared 0% None 78%

Common Shares in SION Over Time

Shares Held

Position Value (USD)

Position in Biotechnology

Healthcare · as of Jun 30, 2026

RHUMBLINE ADVISERS holds $1,414,750,230 across 329 Biotechnology names. SION ranks #138 (0.1% of the industry book) .

# Ticker Company Shares Value (USD) Open

All Filings in SION

Export CSV
5 filing rows on record
Report Date Value (USD) Shares
2026-06-30 $981,372 22,309
2026-03-31 $733,967 18,308
2025-12-31 $727,931 17,694
2025-09-30 $507,028 17,240
2025-06-30 $306,574 17,670