Sonendo

SONX

Medical - Devices · Healthcare

Price

$0.55

+0.00 (+0.00%)

Market Cap

$235,071

Exchange

Other OTC

Winston Score

Winston is worried

Weak fundamentals across most pillars.

Data as of Aug 23, 2026 · filings through Dec 31, 2024

How the score breaks down

Quality

Weak

Growth

Mixed

Cash Flow

Weak

Stability

Weak

Valuation

Data not available

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Share count falling — buybacks

−78.9% over 4y

The company has reduced its share count over this period, returning value to shareholders through buybacks.

Diluted shares outstanding: 22.6M (2021) → 4.8M (2025)

Winston Score History

The full picture

Sonendo is a medical device company that makes a specialized system for cleaning and treating infected teeth. Its main product is the GentleWave System, which uses sound waves and fluid to remove bacteria from inside teeth — a procedure called root canal treatment. Dentists and endodontists (root canal specialists) in the United States are its primary customers.

The company makes money by selling or placing the GentleWave machines in dental offices and then charging for the single-use procedure kits needed each time the system is used, creating a recurring revenue stream. Sonendo operates mainly in the U.S. and is a small company, with its stock market value near zero, reflecting significant financial losses — its operating margin was deeply negative in recent periods. The key risk is that the company burns through cash quickly and must convince more dental practices to adopt its technology in a market where traditional root canal tools are already well established.

Growth Profile

For growth stock investors

When traditional metrics don't capture the full picture, these are the signals growth stock investors use instead.

Revenue Growth

-29.0% YoY

YoY Growth Rate

Revenue declining

EPS Growth

-8.3% YoY

YoY Growth Rate

Earnings declining

R&D Spend

$4M/ year

↓ Declining (-37% vs prior year)

15.0% of revenue

In line with sector average (18%)

R&D spend declining — could signal cost-cutting or efficiency

Insider Activity

0.7%ownership

Relatively low insider ownership

Cash Runway

~12 months

$12M cash & investments

Quarterly Free Cash Flow

↑ Burn rate improving

Adequate runway but may need to raise capital within 2 years

Revenue declining

Sonendo's revenue is actually shrinking. In a growth stock, that removes the core investment thesis. The low Winston Score here may be warranted — unless there's a turnaround story.

The Winston Score above measures business quality today. Growth stocks often score lower because they invest in the future rather than maximising current profits. These metrics show what matters most for evaluating that future.

Score breakdown

Every number that matters to educated investors.

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Quality

Profit per sale

Gross Margin

41.1%

Healthy — 41.1% gross margin

Profit after running costs

Operating Margin

-67.9%

Losing money on operations — -67.9%

Return on the money invested

ROCE

-141.7%

Weak — -141.7% return on capital

Negative ROIC means the business is losing money on every dollar invested in it.

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Growth

Sales growth

Sales YoY

-27.7%

Shrinking sales (-27.7% YoY)

Profit growth

EPS YoY

N/A

—

Data not available

How steady the profit is

EPS Consistency

6/8 quarters

Earnings grew in most of the last 8 quarters

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Cash Flow

Profit that turns into cash

Cash Conversion

N/A

—

Data not available

Spare cash per sale

FCF Margin

-78.3%

Burning cash (-78.3%)

Free cash flow is negative. They are burning cash, not generating it.

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Stability

What it owes vs what it owns

Debt / Equity

2.99

Heavy debt load (2.99)

Covers its interest

Interest Cover

N/A

Data not available

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Valuation

Price vs profit

P/E Ratio (TTM)

N/M

—

Negative earnings — P/E not meaningful

Cheaper or dearer next year

P/E vs Forward

N/A

not available

Data not available

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Dividends

Not applicable for this business.

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