State Ledger
Company profile

Sionna Therapeutics, Inc. CIK 2036042

Ticker
SION (Nasdaq)
Industry
Pharmaceutical Preparations
Headquarters
Waltham, MA 02451
Fiscal year end
2025 (FY)
Market Data
Close
$4.08
Change
-$0.30
Change %
-6.74%
Volume
62,336

SION · trading date Oct 14, 2026 · previous close $4.38 · source: Alpaca (IEX feed, not consolidated full-market data).

Key Financials
Revenue
—
Net income
-$75.27M
Total assets
$325.95M
Total liabilities
$19.12M
Stockholders' equity
$306.83M
Cash & equivalents
$58.45M
Operating income
-$88.98M
Operating cash flow
-$66.30M
Capital expenditures
$377.0K

Fiscal year 2025, via 10-K filed 2026-03-02. A dash means this figure wasn't reported in the source filing under a field State Ledger recognizes - not that the value is zero.

Financial Performance
Operating margin
—
Net margin
—
Free cash flow
-$66.67M
Free cash flow margin
—
Liabilities / assets
5.9%
Equity / assets
94.1%
CapEx / revenue
—
Operating cash flow / net income
0.88×

Derived from the fiscal year 2025 figures above. These metrics are mathematical calculations and do not represent a rating or assessment of the company.

Financial History
Fiscal yearRevenueNet incomeAssetsLiabilitiesEquity
2025 — -$75.27M $325.95M $19.12M $306.83M
2024 — -$61.69M $185.75M $19.10M -$163.71M
Company Details
SIC code
2834
State of incorporation
DE
Active filer
Yes
Most recent SEC filing
Form 4
2026-09-18
Financials filed via
Form 10-K
filed 2026-03-02

"Most recent SEC filing" may differ from the filing used for the financial figures above.

Location
Waltham, MA 02451
21 HICKORY DRIVE, SUITE 500
Data & Methodology

SEC EDGAR submissions API (identity, collected Sep 19, 2026, 15:11 UTC) and SEC XBRL Company Facts API (financials, collected Sep 26, 2026, 15:35 UTC) · figures as originally filed, not restated · a dash always means a value wasn't reported, never a real zero.

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