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Calix

CALX
52
Communication Equipment · Technology
Winston Score
52
Winston is curious
Mixed quality — meaningful strengths and weaknesses.
Data as of Aug 23, 2026 · filings through Jun 27, 2026
How the score breaks down
Quality
Mixed
Growth
Good
Cash Flow
Strong
Stability
Good
Valuation
Good

Winston Score History

The full picture

Calix makes software and cloud platforms that help small and mid-sized internet service providers (ISPs) run their networks and serve their customers better. Its main products include a cloud management platform and subscriber-facing apps that ISPs use to manage home Wi-Fi, network performance, and customer support. The company focuses almost entirely on community broadband providers — think small regional phone companies and rural electric cooperatives — rather than large carriers like AT&T or Comcast.

Calix earns money through a mix of software subscriptions, cloud platform fees, and hardware sales, though it has been shifting toward recurring subscription revenue over time. It operates primarily in the United States, where billions in federal funding through programs like BRDIGE and BEAD are pushing rural broadband expansion — a direct tailwind for its core customers. The main risk is that its customer base is narrow and heavily dependent on continued government broadband funding, which could slow or change direction under shifting policy priorities.

Growth Profile

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

Revenue Growth

+21.3% YoY

YoY Growth Rate

Steady revenue growth

EPS Growth

>+1,000% YoY

YoY Growth Rate

EPS growth accelerating

Insider Activity

9.5%ownership

Flat

Insider ownership roughly steady over the past year

Cash Position

Cash flow positive

$194M cash & investments

Quarterly Free Cash Flow

↓ Burn rate worsening

Company generates more cash than it spends — no dilution risk from fundraising

Growth + cash flow

Calix is a rare growth stock that's already generating positive cash flow while growing at 21%. The Winston Score doesn't fully credit this transition from "burner" to "earner."

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

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Quality

Profit per sale
Gross Margin
54.6%
Healthy — 54.6% gross margin
Profit after running costs
Operating Margin
7.4%
Modest — 7.4% operating margin
Return on the money invested
ROCE
8.6%
Below par — 8.6% return on capital

ROIC between 5% and 15%. They earn 5 to 15 cents back per year on every dollar invested.

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Growth

Sales growth
Sales YoY
+27.8%
Fast-growing sales (+27.8% YoY)
Profit growth
EPS YoY
N/A
Data not available
How steady the profit is
EPS Consistency
5/8 quarters
Mixed — about half the quarters showed growth

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Cash Flow

Profit that turns into cash
Cash Conversion
214%
Turns 214% of profit into real cash
Spare cash per sale
FCF Margin
7.7%
Modest free cash flow (7.7%)

FCF margin between 0% and 10%. Some cash from sales, but not a lot.

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Stability

What it owes vs what it owns
Debt / Equity
N/A
Data not available
Covers its interest
Interest Cover
100.00x
Comfortably covers interest (100.0x)

Interest coverage above 8. Profits cover interest many times over.

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Valuation

Price vs profit
P/E Ratio (TTM)
51.1x
no trend
Expensive — P/E 51.1

P/E over 35. The market is pricing in heavy, sustained growth.

Cheaper or dearer next year
P/E vs Forward
+30.7
GROWING
Earnings expected to grow meaningfully — cheaper on forward P/E (51.1 → 20.4)

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Dividends

Not applicable for this business.
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