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SIONNA THERAPEUTICS INC (SION)

Institutional ownership, SEC filings and insider activity

Sector: Healthcare & Pharma · SEC CIK 0002036042 · EDGAR filings · Updated 2026-07-09

SIONNA THERAPEUTICS INC (SION) has reported institutional ownership of 100.6%, with 122 institutional managers holding positions valued at $1.82B per the latest 13F reporting period. SEC filings include an active substantial-doubt (going concern) disclosure per the filings.

Institutional ownership
100.6%
Institutional managers
122
Reported 13F value
$1.82B
Insider activity
151 trans.
−$77.4M net selling
Data flags
1 active
from SEC filings

Latest updates

Institutional ownership overview

According to SEC 13F filings tracked by Sightfile, SIONNA THERAPEUTICS INC has 122 institutional holders and institutional ownership of 100.6%.

Insider activity

Insiders reported 151 transactions (1 buys, 135 sells) across 12 reporting insiders, with a net reported value of −$77.4M.

Data flags from SEC filings

Active substantial-doubt (going concern) disclosure per the filings, most recently filed 2026-05-12 (recurring since 2025-03-20) — source filing. The authoritative details are those stated in the filing itself.

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See full history, cross-references and alerts on Sightfile
Sightfile provides information only — not investment advice, recommendations, or an assessment of any security. Data is derived from official public sources (SEC EDGAR and U.S. government agencies), may contain errors or delays, and should be verified against the source filing before relying on it.
Data sources: SEC EDGAR (filings, 13F, FTD), aggregated by Sightfile. Page updated 2026-07-09.