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Calix

CALX
52
Software - Application · Technology
Price
$39.14
+0.51 (+1.32%)
Market Cap
$2.50B
Winston Score
52
Winston is curious
Mixed quality — meaningful strengths and weaknesses.

Share count rising — dilution

+3.8% over 4y

The company has issued more shares over this period, which dilutes each existing shareholder’s stake.

Diluted shares outstanding: 67.9M (2021) → 70.4M (2025)

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.

Winston Score History

Growth Profile

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

Revenue Growth

+27.1% YoY

YoY Growth Rate

Revenue accelerating

EPS Growth

+334.5% YoY

YoY Growth Rate

EPS growth accelerating

R&D Spend

$190M/ year

Rising (+6% vs prior year)

19.0% of revenue

In line with sector average (15%)

Investing heavily in future products and technology

Insider Activity

9.5%ownership

Flat

Insiders holding steady — not selling despite ability to

Cash Position

Cash flow positive

$55M cash & investments

Quarterly Free Cash Flow

↑ Burn rate improving

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

Revenue accelerating

Calix grew revenue 27% year-over-year and the growth rate is speeding up. That's the kind of momentum growth investors look for — the question is whether margins can follow.

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

Gross Margin
56.9%
Premium pricing power — 56.9% gross margin
Operating Margin
4.5%
Thin — 4.5% operating margin
ROCE
1.7%
Weak — 1.7% return on capital

ROIC between 0% and 5%. They earn a few cents back per dollar invested in the business.

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Growth

Sales YoY
+28.4%
Fast-growing sales (28.4% YoY)
EPS YoY
N/A
Data not available
EPS Consistency
6/8 quarters
Earnings grew in most of the last 8 quarters

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Cash Flow

Cash Conversion
391%
Turns 391% of profit into real cash
FCF Margin
10.3%
Modest free cash flow (10.3%)

FCF margin between 10% and 20%. Every $100 in sales becomes $10 to $20 in real cash.

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Stability

Debt / Equity
N/A
Data not available
Interest Cover
100.00x
Comfortably covers interest (100.0x)

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

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Valuation

P/E Ratio (TTM)
75.7x
Expensive — P/E 75.7

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

P/E vs Forward
+55.2
GROWING
Earnings expected to grow meaningfully — cheaper on forward P/E (75.7 → 20.5)

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Dividends

Not applicable for this business.
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