ONTO vs ROK
Onto Innovation Inc. (ONTO) and Rockwell Automation, Inc (ROK) are both filed with the SEC under Measuring & Controlling Devices, NEC. ROK is 3.3× ONTO's size by market cap ($48.1B against $14.4B); ONTO trades at the higher fiscal-year P/E (72.1× against 56.5×); ONTO reports the higher net margin (13.6% against 10.4%); ROK grew sales faster over three years (+2.4% against +0.0%); and over the past year ONTO returned +147.7% against ROK's +24.7%.
| ONTO | ROK | |
|---|---|---|
| Last close | $270.79 | $430.86 |
| Market cap | $14.4B | $48.1B |
| P/E (FY) | 72.1× | 56.5× |
| P/S | 14.3× | 5.8× |
| EV/EBITDA | — | 24.8× |
| Gross margin | 49.7% | 48.1% |
| Operating margin | 13.2% | 20.4% |
| Net margin | 13.6% | 10.4% |
| Return on equity | 6.8% | 24.3% |
| Sales growth (3y) | +0.0% | +2.4% |
| EPS growth (3y) | -14.8% | -1.3% |
| Dividend yield | — | 1.2% |
| 1-year return | +147.7% | +24.7% |
Screener snapshot — prices as of 2026-08-28. Each side's last close is the most recent session the snapshot holds for that company, which can be an earlier one, and its 1-year return is measured to that close. Market caps struck on 2026-08-27. Last close, market cap and the 1-year return are price figures; every other row is computed over the company's latest filed fiscal year, and the two differ: ONTO FY2026 (ended 2026-01-03); ROK FY2025 (ended 2025-09-30). — not published for this company. A ratio goes unpublished for more than one reason: a component the calculation needs is not on file, the filing does not tag the line it is read from, or the calculation is not defined on the filed basis — EV/EBITDA is not printed on non-positive EBITDA, and return on equity is not computed on a zero or negative equity base.
Who holds them, and who has traded them
| ONTO | ROK | |
|---|---|---|
| Institutional holders (13F) | 573 | 1,405 |
| Insider buyers − sellers (180d) | — | -5 |
| Congressional trades disclosed (180d) | 0 | 0 |
| Executive-branch officials on file — trades disclosed (180d) | 0 | 3 |
Counts only. The congressional figures count transactions dated in the trailing 180 days and disclosed in STOCK Act periodic transaction reports; amounts are filed as ranges and are never summed. The executive-branch figures count the same window of transactions, and they are scoped to one roster. The officials OGE posts for direct download. Insider buyers − sellers counts distinct people filing open-market Form 4 purchases minus distinct people filing open-market sales over the trailing 180 days, capped at ±5. — no open-market Form 4 purchases or sales in the window.
ONTO vs ROK: common questions
- Is ONTO bigger than ROK?
- ROK carries the larger market cap — $48.1B against $14.4B, both struck on 2026-08-27.
- Which trades at a higher P/E, ONTO or ROK?
- ONTO, at a fiscal-year 72.1× against 56.5× for ROK. Both are price ÷ latest full-year diluted earnings per share, not a trailing-twelve-month P/E.
- How have ONTO and ROK performed over the past year?
- ONTO returned +147.7% and ROK +24.7%, measured on the trailing calendar year to the last close.
- How many institutions hold ONTO and ROK?
- 573 13F filers report a position in ONTO and 1,405 in ROK, on the latest quarter in the panel.
- Are ONTO and ROK in the same industry?
- Both are filed with the SEC under Measuring & Controlling Devices, NEC, which is the classification this pairing is built on.
ONTO overview → · ROK overview → · ONTO institutional ownership → · ROK institutional ownership → · Executive branch and ROK →
More in Measuring & Controlling Devices, NEC: ONTO vs TMO · ONTO vs TRMB · ROK vs TMO · ROK vs TRMB
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Source: SPZCO — https://spzco.com/vs/onto-vs-rok