TER vs ACLS vs AMAT vs ONTO vs KLAC

For growth investors, KLA Corporation (KLAC) is the stronger pick with 23.

9% revenue growth year-over-year, versus -17. 6% for Axcelis Technologies, Inc. (ACLS). Axcelis Technologies, Inc. (ACLS) offers the better valuation at 41. 8x trailing P/E (43. 5x forward), making it the more compelling value choice. Analysts rate Teradyne, Inc. (TER) a "Buy" — based on 31 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, Axcelis Technologies, Inc.

(ACLS) is the cheapest at 41. 8x versus Teradyne, Inc. at 101. 8x. On forward P/E, Applied Materials, Inc. is actually cheaper at 37. 1x — notably different from the trailing picture, reflecting expected earnings growth. The PEG ratio (P/E divided by earnings growth rate) is the most growth-adjusted single valuation metric: Onto Innovation Inc. wins at 1. 12x versus Applied Materials, Inc. 's 2. 16x — a reasonable growth-adjusted valuation.

Over the past 5 years, KLA Corporation (KLAC) delivered a total return of +460.

4%, compared to +178. 1% for Teradyne, Inc. (TER). Over 10 years, the gap is even starker: KLAC returned +25. 1% versus ONTO's +1432%. 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), Axcelis Technologies, Inc.

(ACLS) is the lower-risk stock at 2. 00β versus Onto Innovation Inc. 's 2. 66β — meaning ONTO is approximately 33% more volatile than ACLS relative to the S&P 500. On balance sheet safety, Onto Innovation Inc. (ONTO) carries a lower debt/equity ratio of 1% versus 130% for KLA Corporation — giving it more financial flexibility in a downturn.

By revenue growth (latest reported year), KLA Corporation (KLAC) is pulling ahead at 23.

9% versus -17. 6% for Axcelis Technologies, Inc. (ACLS). On earnings-per-share growth, the picture is similar: KLA Corporation grew EPS 49. 8% year-over-year, compared to -38. 2% for Axcelis Technologies, Inc.. Over a 3-year CAGR, KLAC leads at 9. 7% 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.

KLA Corporation (KLAC) is the more profitable company, earning 33.

4% net margin versus 13. 6% for Onto Innovation Inc. — meaning it keeps 33. 4% of every revenue dollar as bottom-line profit. Operating margin tells a similar story: KLAC leads at 43. 1% versus 13. 2% for ONTO. At the gross margin level — before operating expenses — KLAC leads at 62. 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, Onto Innovation Inc. (ONTO) is the more undervalued stock at a PEG of 1. 12x versus Applied Materials, Inc. 's 2. 16x. A PEG below 1. 5 suggests fair-to-attractive pricing relative to expected growth. On forward earnings alone, Applied Materials, Inc. (AMAT) trades at 37. 1x forward P/E versus 49. 1x for Teradyne, Inc. — 12. 0x cheaper on a one-year earnings basis. Analyst consensus price targets imply the most upside for ONTO: 12. 5% to $308. 33.

In this comparison, AMAT (0.

4% yield), KLAC (0. 4% yield), TER (0. 1% yield) pay a dividend. ACLS, ONTO do not pay a meaningful dividend and should not be held primarily for income.

For long-horizon retirement investors, Teradyne, Inc.

(TER) is the stronger choice — it scores higher on the combination of lower volatility, dividend reliability, and long-term compounding (+1803% 10Y return). Applied Materials, Inc. (AMAT) carries a higher beta of 2. 14 — meaning larger drawdowns in market downturns, which matters significantly when you cannot wait years for a recovery. Both have compounded well over 10 years (TER: +1803%, AMAT: +20. 1%), 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: TER is a mid-cap quality compounder stock; ACLS is a small-cap quality compounder stock; AMAT is a large-cap quality compounder stock; ONTO is a mid-cap quality compounder stock; KLAC is a large-cap high-growth stock. 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.