SION

Sionna TherapeuticsNASDAQ · StockExchangeNASDAQ

$3.69−0.02 (−0.40%)US pre-market · opens in 3h 48m

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Daily move−0.4%vs prev close $3.71

VolatilityVery highATR $0.30 · 8.1%

Gap %+0.8%Open vs prev close

52-week position1%of range $3.20–$54.71

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Why is SION moving?

Automated summary · updated 04:02 ET

SION is down 0.4% as of the last close. We found no company-specific news; that’s within its normal daily range.

NoteWithin its normal range

Built automatically from market data. Not investment advice.

Part of

Collections that include SION

ThemeEarnings movers+3.6% today

ExchangeNASDAQ-listed+2.5% today

Investor holdings

Held by 6 of 50 tracked investors13F · Q2 2026 · filed by Aug 14

2opened a position1added3trimmed or sold

Viking Global InvestorsAndreas Halvorsen · Long/short fund0.4%$141MNo change Citadel AdvisorsKen Griffin · Multi-strategy fund0.0%$50MTrimmed −2%Millennium ManagementIsrael Englander · Multi-strategy fund0.0%$12MAdded +97%D. E. ShawDavid E. Shaw · Quant fund0.0%$4MNew position Point72 Asset ManagementSteve Cohen · Multi-strategy fund0.0%$2MTrimmed −64%US long positions only · filings lag the quarter end by up to 45 days · SEC EDGAR 13F · All tracked investors

Key stats

Stock

Open / Prev close: $3.74 / $3.71
Day range: $3.69 – $3.85
52-week range: $3.20 – $54.71
Volume: 32.36K
Market cap: $167.3M
ATR (14): $0.30 · 8.1% · Very high
Gap %: +0.8%

SEC filings

All filings

Nov 10, 2026Quarterly report filedQuarterly report · SEC EDGAR10-Q Nov 10, 2026Reported results of operationsMaterial event · SEC EDGAR8-K Sep 21, 2026Amended: disclosed an activist stake of 5% or moreActivist stake · SEC EDGAR13D/A Sep 21, 2026Insider trade reportedInsider trade · SEC EDGARForm 4 Sep 18, 2026Insider trade reportedInsider trade · SEC EDGARForm 4 Sep 14, 2026Announced exit or restructuring costs; Director or officer changeMaterial event · SEC EDGAR8-K

About Sionna Therapeutics

Sionna Therapeutics is listed on NASDAQ and belongs to the null industry in the null sector.

Market cap: $167.3M
Exchange: NASDAQ

SION FAQ

When is SION’s next earnings report?

Mar 1, 2027. Analysts expect EPS of $-0.54.

Why is SION stock moving today?

SION is down 0.4% as of the last close.

How volatile is SION?

SION’s average true range over 14 days is $0.30, 8.1% of its price. That puts it in our very high volatility class.

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