HLIT vs ATEN vs VIAV vs CALX

For growth investors, Calix, Inc.

(CALX) is the stronger pick with 20. 3% revenue growth year-over-year, versus 8. 4% for Viavi Solutions Inc. (VIAV). Harmonic Inc. (HLIT) offers the better valuation at 37. 2x trailing P/E (21. 8x forward), making it the more compelling value choice. Analysts rate A10 Networks, Inc. (ATEN) a "Buy" — based on 20 analyst ratings — the highest consensus in this comparison. The "better buy" depends entirely on your goals: growth investors should weight revenue trajectory, value investors should weight P/E and PEG, and income investors should weight dividend yield and streak.

On trailing P/E, Harmonic Inc.

(HLIT) is the cheapest at 37. 2x versus Viavi Solutions Inc. at 340. 3x. On forward P/E, Harmonic Inc. is actually cheaper at 21. 8x. The PEG ratio (P/E divided by earnings growth rate) is the most growth-adjusted single valuation metric: A10 Networks, Inc. wins at 1. 26x versus Viavi Solutions Inc. 's 12. 09x — a reasonable growth-adjusted valuation.

Over the past 5 years, Viavi Solutions Inc.

(VIAV) delivered a total return of +212. 0%, compared to -9. 3% for Calix, Inc. (CALX). Over 10 years, the gap is even starker: VIAV returned +715. 5% versus HLIT's +269. 9%. Past returns do not guarantee future results, and the stock with the higher historical return may already have its best growth priced in.

By beta (market sensitivity over 5 years), A10 Networks, Inc.

(ATEN) is the lower-risk stock at 0. 99β versus Viavi Solutions Inc. 's 1. 54β — meaning VIAV is approximately 56% more volatile than ATEN relative to the S&P 500. On balance sheet safety, Calix, Inc. (CALX) carries a lower debt/equity ratio of 3% versus 105% for A10 Networks, Inc. — giving it more financial flexibility in a downturn.

By revenue growth (latest reported year), Calix, Inc.

(CALX) is pulling ahead at 20. 3% versus 8. 4% for Viavi Solutions Inc. (VIAV). On earnings-per-share growth, the picture is similar: Viavi Solutions Inc. grew EPS 225. 0% year-over-year, compared to -54. 2% for Harmonic Inc.. Over a 3-year CAGR, HLIT leads at 10. 2% annualised revenue growth. Higher growth typically commands a higher valuation multiple — check whether the premium P/E or P/S is justified by the growth rate using the PEG ratio.

A10 Networks, Inc.

(ATEN) is the more profitable company, earning 14. 5% net margin versus 1. 8% for Calix, Inc. — meaning it keeps 14. 5% of every revenue dollar as bottom-line profit. Operating margin tells a similar story: ATEN leads at 16. 2% versus 2. 1% for CALX. At the gross margin level — before operating expenses — ATEN leads at 79. 3%, reflecting greater pricing power or product mix advantage. Stronger margins indicate durable pricing power, lower cost of revenue, or higher mix of software/services. They are one of the clearest signs of business quality.

The PEG ratio (forward P/E divided by expected earnings growth rate) is the most precise measure of undervaluation relative to growth potential.

By this metric, A10 Networks, Inc. (ATEN) is the more undervalued stock at a PEG of 1. 26x versus Viavi Solutions Inc. 's 12. 09x. A PEG below 1. 5 suggests fair-to-attractive pricing relative to expected growth. On forward earnings alone, Harmonic Inc. (HLIT) trades at 21. 8x forward P/E versus 55. 2x for Viavi Solutions Inc. — 33. 4x cheaper on a one-year earnings basis. Analyst consensus price targets imply the most upside for CALX: 40. 2% to $61. 00.

In this comparison, ATEN (0.

9% yield) pays a dividend. HLIT, VIAV, CALX do not pay a meaningful dividend and should not be held primarily for income.

For long-horizon retirement investors, A10 Networks, Inc.

(ATEN) is the stronger choice — it scores higher on the combination of lower volatility, dividend reliability, and long-term compounding (low volatility (β 0. 99), 0. 9% yield, +366. 2% 10Y return). Harmonic Inc. (HLIT) carries a higher beta of 1. 51 — meaning larger drawdowns in market downturns, which matters significantly when you cannot wait years for a recovery. Both have compounded well over 10 years (ATEN: +366. 2%, HLIT: +269. 9%), confirming both are viable long-term holds — but the lower-volatility option typically results in less emotional selling during corrections. Retirement portfolios generally favour predictability over maximum returns. Consult a financial advisor before making allocation decisions.

Both stocks operate in the Technology sector, making this a peer-level intra-sector comparison — the same macro tailwinds and headwinds will affect both.

In terms of investment character: HLIT is a small-cap quality compounder stock; ATEN is a small-cap quality compounder stock; VIAV is a mid-cap quality compounder stock; CALX is a small-cap high-growth stock. ATEN pays a dividend while HLIT, VIAV, CALX do not, making them suitable for different income and tax situations. These fundamental differences mean investors should not choose between them on a single metric — the "better stock" depends entirely on which of these characteristics aligns with your investment strategy.