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SION · Sionna Therapeutics, Inc.

Track SION — free
$3.87 +0.18 (+4.88%) At close · Oct 27
Market Cap
$165.93M
Shares
45.21M
Volume · Oct 27 1M Avg daily vol (3M) 2.25M

Price & Indicators

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20d MA 50d MA 200d MA Earnings Filing Insider Congress Investor day
Close$3.87 Open$3.68 Day$3.63–3.91 52W close$3.60–51.04 Avg vol 30d1.3M Short int3.7M · 8.1% float · 3.7d Short vol32% Last earningsSep 14, 2026 DataFeb 2025–Oct 2026 Filing10-Q · Aug 6

Up next

Next earnings call
Dec 25, 2026 Est · unconfirmed · in 8 wks
filed Aug 6, 2026
call held Sep 14, 2026

Metrics snapshot

Useful current figures from the complete screener profile.

Revenue (TTM)
—
Trailing 12 months
Net income (TTM)
−$97.38M
Trailing 12 months
Revenue growth YoY
—
Year over year
Operating margin
—
Trailing 12 months
P / E (TTM)
—
Trailing earnings
FCF yield
-46.2%
TTM · current market cap
Return on invested capital
—
Trailing 12 months
Net cash
$63.32M
Latest balance sheet
Dividend yield
—
Trailing 12 months
Shares change YoY
+2.3%
Year over year · more shares
Price change (1Y)
-90.6%
Trailing year
Short interest
8.1%
Latest settlement · 3.7 days to cover
View all 122 metrics

AI Brief

Q2 FY26 earnings call · Sep 14, 2026
Q2 FY26

TL;DR. Sionna reported that its Phase 2a Precision CF trial of SION-719 added to Trikafta failed to meet its primary activity endpoint (mean placebo-adjusted sweat chloride change of -1 mmol/L, p=0.7, vs. a targeted ≥10 mmol/L improvement), and the company is discontinuing development of 719 as add-on therapy; the Phase 1 dual combination trial of SION-451 met its safety, tolerability, and PK goals and identified 451+2222 as the preferred dual combination. The company ended Q2 with $268.3M in cash and is taking actions to preserve capital while evaluating next steps for 451+2222.

Bullish
  • + Phase 1 dual combination trial of SION-451 met safety, tolerability, and PK objectives, exceeding target exposures set before the Precision CF readout.
  • + 451+2222 selected as preferred dual combination based on favorable tolerability and exposure.
  • + Cash position of $268.3M is expected to fund operations into 2028.
Bearish
  • − Company is discontinuing development of SION-719 as an add-on to standard of care.
  • − Higher-than-expected variability in sweat chloride and observed differential Trikafta exposure between treatment periods are potential confounders that require further investigation before deciding the 451+2222 path forward.

AI-generated from the earnings call and 8-K · may contain errors · not investment advice

Equibles Rating

blended score · not investment advice
Overall
Sell
SellHoldBuy
Technical Sell Momentum Very Weak Sentiment Bullish Fundamentals Strong Quant / Vol Very High
Market backdrop VIX 18.4 · elevated Equity put/call 0.60
Technical
price trend
Sell
50 / 200-day cross No cross
Price vs 200-day avg −87%
below
Price vs 50-day avg −30%
below
RSI (14) 30
oversold
MACD trend Positive
52-week position 1%
near low
Volume (OBV) Confirms
volume backs price
Momentum
relative strength
Very Weak
1-month return −25%
trailing
6-month return −91%
trailing
YTD return −91%
this year
Relative strength −96%
vs S&P · 6-mo
Sentiment
smart money
Bullish
Trend (MA cross) No cross
50d $6 › 200d $31 — 200d above 50d
Institutional flow Accumulating
18 of 150 funds reported for Sep 30 · net +1.0M sh shares · +9 new
Insider flow Distributing
Net -$21.8M over 90 days · 100% sells
Short interest Falling
8.13% of float · ▼ -3.2% MoM · 3.7 days cover
Volume signal Normal
Volume near normal
Institution breadth Multi-yr high
150 holders — near 1-yr high, broad support
Squeeze score 57
elevated · 0–100
Fundamentals
Strong
EPS growth +88%
Y/Y
Free cash flow $-66.7M
Balance sheet $58.5M
net cash
Quant / Vol
risk profile
Very High
Volatility 121%
annualized · 1-yr
Max drawdown −93%
past year
ATR 12.1%
of price · 14-day

Blended from price, momentum, positioning, fundamentals & volatility · daily-close · not investment advice. Market backdrop is context, not part of the score.

Technicals

trend & momentum for long-term holders Sell
3 · 3 · 1
50 / 200-day cross
No cross Neutral
Price vs 200-day avg
−87% Bearish
Price vs 50-day avg
−30% Bearish
RSI (14)
30 Neutral
MACD trend
Positive Bullish
52-week position
1% Bearish
Volume (OBV)
Confirms Neutral
Market signals — smart money & positioning
Bullish · 3 of 6
Trend (MA cross) No cross
50d $6 › 200d $31 — 200d above 50d
Institutional flow Accumulating
18 of 150 funds reported for Sep 30 · net +1.0M sh shares · +9 new
Insider flow Distributing
Net -$21.8M over 90 days · 100% sells
Short interest Falling
8.13% of float · ▼ -3.2% MoM · 3.7 days cover
Volume signal Normal
Volume near normal
Institution breadth Multi-yr high
150 holders — near 1-yr high, broad support
Price context
position in its 52-week range
Range low $4 Now $4 · 1% Range high $51
vs 200-day avg -87% vs 50-day avg -30%

Illustrative technical + ownership context — a signal mix, not investment advice.

Key metrics

Earlier KPI extraction records exist, but do not meet the current evidence-completeness requirements. No current verified series is available. Earlier figures remain withheld until revalidated; this is not evidence that the company reports no KPIs.

Versus peers

Biotechnology — same industry group
Open screener →
Company Mkt cap YTD Rev growth Y/Y P/E Short % shares
SION
Sionna Therapeutics, Inc.
this stock
$165.93M -90.6% — — 8.1%
VRTX
Vertex Pharmaceuticals Inc
$131.20B +14.9% +46.2% 30.2 1.7%
REGN
Regeneron Pharmaceuticals, Inc.
$83.15B +5.7% +20.8% 20.0 2.1%
MRNA
Moderna, Inc.
$79.39B +605.2% +4.3% — 8.2%
CSLLY
Csl Ltd
$65.57B — — — 0.0%

Peers by industry group · P/E from as-reported trailing EPS · short % is of shares outstanding

At a glance

key data from every section
Ownership
Institutional Holders Accumulating
Holders
157
% held
109.2%
Reported
18 of 150
Top holder
RA CAPITAL MANAGEMENT, L.…
Held Float
View
Held by Funds
Fund positions
138
View
Short & Settlement
Short Interest Falling
Shares short
3.7M
Days to cover
3.7d
Change
-121.2K sh
View
Short Volume
Short vol %
32%
As of
Oct 27, 2026
Short Total
View
Fails to Deliver
FTD shares
1.7K
Value
$10.3K
As of
Sep 23, 2026
View
Off-Exchange
Off-exchange %
48.6%
Week of
Sep 21, 2026
Off-exch Lit
View
Smart Money
Insider Trades Net selling
Net (90d)
-$21.8M
Buyers / Sellers
0 / 1
Buyers Sellers
View
Financials
Financials
Net income (FY)
$-75.3M
EPS diluted
$-1.88
View
Filings
SEC Filings
Latest
8-K
Filed
Sep 14, 2026
This year
17
View
Proposed Sales
Value
$21.8M
Shares
3.4M
Filed
Sep 17, 2026
View
Earnings & Events
Webcasts
Last webcast
Sep 14, 2026
View

Performance

5D 20D 120D MTD YTD
SION -6.8% -24.9% -91.1% -26.4% -90.6%
SPY +0.1% +0.7% +4.9% +0.9% +12.9%
vs SPY -6.8% -25.6% -95.9% -27.4% -103.5%
Key facts CIK 2036042 CUSIP 829401108 13F (30d) 16 filings 16 filers Visit website Investor relations