ONTO
Onto Innovation Inc
NYSE: ONTO · TECHNOLOGY · SEMICONDUCTOR EQUIPMENT & MATERIALS
$287.52
-7.83% today
Updated 2026-06-05
Market cap
$16.11B
P/E ratio
151.35
P/S ratio
15.63x
EPS (TTM)
$2.14
Dividend yield
—
52W range
$89 – $327
Volume
1.0M
Onto Innovation Inc (ONTO) Insider transactions
Net insider activity
Net buying (126,954 shares)
Buy transactions
52
Sell transactions
48
All transactions
| Date | Insider | Title | Type | Shares | Price | Value |
|---|---|---|---|---|---|---|
| 2026-05-20 | SU, MAY | Director | Buy | 761 | — | — |
| 2026-05-20 | SEAMS, CHRISTOPHER A | Director | Buy | 761 | — | — |
| 2026-05-20 | SCHWARTZ, STEPHEN S | Director | Buy | 761 | — | — |
| 2026-05-20 | MILLER, DAVID BRIAN | Director | Buy | 761 | — | — |
| 2026-05-20 | LYNCH, SUSAN D | Director | Buy | 761 | — | — |
| 2026-05-20 | KELLEY, STEPHEN DOUGLAS | Director | Buy | 761 | — | — |
| 2026-05-15 | YALDAEI, RAMIL | Chief Operating Officer | Sale | 625 | $271.77 | $169856.25 |
| 2026-05-15 | YALDAEI, RAMIL | Chief Operating Officer | Sale | 218 | $271.77 | $59245.86 |
| 2026-05-15 | OH, YOON AH | SVP, Gen Counsel & Corp Sec | Sale | 530 | $271.77 | $144038.10 |
| 2026-03-03 | YALDAEI, RAMIL | Chief Operating Officer | Sale | 615 | $207.50 | $127612.50 |
| 2026-03-03 | PLISINSKI, MICHAEL P | Director, Chief Executive Officer | Sale | 3,742 | $207.50 | $776465.00 |
| 2026-03-03 | OH, YOON AH | SVP, Gen Counsel & Corp Sec | Sale | 417 | $207.50 | $86527.50 |
| 2026-03-03 | DOLEV, IDO | EVP, Prod Solutions Grp | Sale | 819 | $207.50 | $169942.50 |
| 2026-03-02 | YALDAEI, RAMIL | Chief Operating Officer | Buy | 1,548 | — | — |
| 2026-03-02 | YALDAEI, RAMIL | Chief Operating Officer | Buy | 7,683 | — | — |
| 2026-03-02 | ROBERTS, BRIAN K | Chief Financial Officer | Buy | 1,548 | — | — |
| 2026-03-02 | ROBERTS, BRIAN K | Chief Financial Officer | Buy | 3,096 | — | — |
| 2026-03-02 | PLISINSKI, MICHAEL P | Director, Chief Executive Officer | Buy | 7,239 | — | — |
| 2026-03-02 | PLISINSKI, MICHAEL P | Director, Chief Executive Officer | Buy | 14,479 | — | — |
| 2026-03-02 | OH, YOON AH | SVP, Gen Counsel & Corp Sec | Buy | 1,204 | — | — |
| 2026-03-02 | OH, YOON AH | SVP, Gen Counsel & Corp Sec | Buy | 2,408 | — | — |
| 2026-03-02 | DOLEV, IDO | EVP, Prod Solutions Grp | Buy | 1,720 | — | — |
| 2026-03-02 | DOLEV, IDO | EVP, Prod Solutions Grp | Buy | 3,440 | — | — |
| 2026-03-02 | CHEN, SHIRLEY | SVP Customer Success | Buy | 1,261 | — | — |
| 2026-03-02 | CHEN, SHIRLEY | SVP Customer Success | Buy | 2,523 | — | — |
| 2026-03-01 | YALDAEI, RAMIL | Chief Operating Officer | Sale | 844 | — | — |
| 2026-03-01 | YALDAEI, RAMIL | Chief Operating Officer | Buy | 649 | — | — |
| 2026-03-01 | YALDAEI, RAMIL | Chief Operating Officer | Sale | 347 | $215.89 | $74913.83 |
| 2026-03-01 | YALDAEI, RAMIL | Chief Operating Officer | Sale | 276 | $215.89 | $59585.64 |
| 2026-03-01 | PLISINSKI, MICHAEL P | Director, Chief Executive Officer | Sale | 5,971 | — | — |
| 2026-03-01 | PLISINSKI, MICHAEL P | Director, Chief Executive Officer | Buy | 4,597 | — | — |
| 2026-03-01 | PLISINSKI, MICHAEL P | Director, Chief Executive Officer | Sale | 2,222 | $215.89 | $479707.58 |
| 2026-03-01 | PLISINSKI, MICHAEL P | Director, Chief Executive Officer | Sale | 1,925 | $215.89 | $415588.25 |
| 2026-03-01 | OH, YOON AH | SVP, Gen Counsel & Corp Sec | Sale | 941 | — | — |
| 2026-03-01 | OH, YOON AH | SVP, Gen Counsel & Corp Sec | Buy | 724 | — | — |
| 2026-03-01 | OH, YOON AH | SVP, Gen Counsel & Corp Sec | Sale | 307 | $215.89 | $66278.23 |
| 2026-03-01 | OH, YOON AH | SVP, Gen Counsel & Corp Sec | Sale | 267 | $215.89 | $57642.63 |
| 2026-02-14 | PLISINSKI, MICHAEL P | Director, Chief Executive Officer | Sale | 11,824 | — | — |
| 2026-02-14 | PLISINSKI, MICHAEL P | Director, Chief Executive Officer | Buy | 18,445 | — | — |
| 2026-02-14 | PLISINSKI, MICHAEL P | Director, Chief Executive Officer | Sale | 8,919 | $217.23 | $1.94M |
| 2026-02-14 | PLISINSKI, MICHAEL P | Director, Chief Executive Officer | Sale | 3,632 | $217.23 | $788979.36 |
| 2026-02-14 | OH, YOON AH | SVP, Gen Counsel & Corp Sec | Sale | 1,977 | — | — |
| 2026-02-14 | OH, YOON AH | SVP, Gen Counsel & Corp Sec | Buy | 3,084 | — | — |
| 2026-02-14 | OH, YOON AH | SVP, Gen Counsel & Corp Sec | Sale | 1,094 | $217.23 | $237649.62 |
| 2026-02-14 | OH, YOON AH | SVP, Gen Counsel & Corp Sec | Sale | 501 | $217.23 | $108832.23 |
| 2025-12-24 | PLISINSKI, MICHAEL P | Director, Chief Executive Officer | Sale | 25,000 | — | — |
| 2025-12-02 | DOLEV, IDO | EVP, Prod Solutions Grp | Sale | 3,183 | $154.01 | $490213.83 |
| 2025-10-03 | YALDAEI, RAMIL | Chief Operating Officer | Sale | 594 | $143.71 | $85363.74 |
| 2025-09-02 | ROBERTS, BRIAN K | Chief Financial Officer | Buy | 21,175 | — | — |
| 2025-09-02 | CHEN, SHIRLEY | SVP, Customer Success | Buy | 12,994 | — | — |
| 2025-06-02 | DOLEV, IDO | EVP, Prod Solutions Grp | Buy | 2,695 | — | — |
| 2025-06-02 | DOLEV, IDO | EVP, Prod Solutions Grp | Buy | 21,562 | — | — |
| 2025-06-02 | DOLEV, IDO | EVP, Prod Solutions Grp | Buy | 5,391 | — | — |
| 2025-05-21 | SU, MAY | Director | Buy | 2,114 | — | — |
| 2025-05-21 | SEAMS, CHRISTOPHER A | Director | Buy | 2,114 | — | — |
| 2025-05-21 | SCHWARTZ, STEPHEN S | Director | Buy | 2,114 | — | — |
| 2025-05-21 | MILLER, DAVID BRIAN | Director | Buy | 2,114 | — | — |
| 2025-05-21 | LYNCH, SUSAN D | Director | Buy | 2,114 | — | — |
| 2025-05-21 | KELLEY, STEPHEN DOUGLAS | Director | Buy | 2,114 | — | — |
| 2025-05-17 | SLICER, MARK | Chief Financial Officer | Sale | 2,066 | $99.40 | $205360.40 |
| 2025-05-15 | YALDAEI, RAMIL | Chief Operating Officer | Sale | 609 | $98.04 | $59706.36 |
| 2025-05-15 | YALDAEI, RAMIL | Chief Operating Officer | Sale | 217 | $98.04 | $21274.68 |
| 2025-05-15 | OH, YOON AH | SVP, Gen Counsel & Corp Sec | Sale | 603 | $98.04 | $59118.12 |
| 2025-03-03 | YALDAEI, RAMIL | Chief Operating Officer | Buy | 1,884 | — | — |
| 2025-03-03 | YALDAEI, RAMIL | Chief Operating Officer | Buy | 3,769 | — | — |
| 2025-03-03 | VEDULA, SRINIVAS | SVP, Customer Success | Buy | 1,287 | — | — |
| 2025-03-03 | VEDULA, SRINIVAS | SVP, Customer Success | Buy | 1,286 | — | — |
| 2025-03-03 | VEDULA, SRINIVAS | SVP, Customer Success | Buy | 2,574 | — | — |
| 2025-03-03 | SLICER, MARK | Chief Financial Officer | Buy | 1,471 | — | — |
| 2025-03-03 | SLICER, MARK | Chief Financial Officer | Buy | 1,470 | — | — |
| 2025-03-03 | SLICER, MARK | Chief Financial Officer | Buy | 2,941 | — | — |
| 2025-03-03 | PLISINSKI, MICHAEL P | Director, CEO | Buy | 11,606 | — | — |
| 2025-03-03 | PLISINSKI, MICHAEL P | Director, CEO | Buy | 23,212 | — | — |
| 2025-03-03 | OH, YOON AH | SVP, Gen Counsel & Corp Sec | Buy | 1,471 | — | — |
| 2025-03-03 | OH, YOON AH | SVP, Gen Counsel & Corp Sec | Buy | 1,470 | — | — |
| 2025-03-03 | OH, YOON AH | SVP, Gen Counsel & Corp Sec | Buy | 2,941 | — | — |
| 2025-03-01 | YALDAEI, RAMIL | Chief Operating Officer | Sale | 305 | $145.66 | $44426.30 |
| 2025-03-01 | VEDULA, SRINIVAS | SVP, Customer Success | Sale | 199 | $145.66 | $28986.34 |
| 2025-03-01 | SLICER, MARK | Chief Financial Officer | Sale | 336 | $145.66 | $48941.76 |
| 2025-03-01 | PLISINSKI, MICHAEL P | Director, CEO | Sale | 1,925 | $145.66 | $280395.50 |
| 2025-03-01 | OH, YOON AH | SVP, Gen Counsel & Corp Sec | Sale | 304 | $145.66 | $44280.64 |
| 2025-02-14 | VEDULA, SRINIVAS | SVP, Customer Success | Sale | 1,369 | — | — |
| 2025-02-14 | VEDULA, SRINIVAS | SVP, Customer Success | Buy | 2,738 | — | — |
| 2025-02-14 | VEDULA, SRINIVAS | SVP, Customer Success | Sale | 1,391 | $176.55 | $245581.05 |
| 2025-02-14 | VEDULA, SRINIVAS | SVP, Customer Success | Sale | 464 | $176.55 | $81919.20 |
| 2025-02-14 | SLICER, MARK | Chief Financial Officer | Sale | 2,282 | — | — |
| 2025-02-14 | SLICER, MARK | Chief Financial Officer | Buy | 4,564 | — | — |
| 2025-02-14 | SLICER, MARK | Chief Financial Officer | Sale | 1,776 | $176.55 | $313552.80 |
| 2025-02-14 | SLICER, MARK | Chief Financial Officer | Sale | 620 | $176.55 | $109461.00 |
| 2025-02-14 | PLISINSKI, MICHAEL P | Director, CEO | Sale | 11,825 | — | — |
| 2025-02-14 | PLISINSKI, MICHAEL P | Director, CEO | Buy | 23,650 | — | — |
| 2025-02-14 | PLISINSKI, MICHAEL P | Director, CEO | Sale | 11,435 | $176.55 | $2.02M |
| 2025-02-14 | PLISINSKI, MICHAEL P | Director, CEO | Sale | 3,812 | $176.55 | $673008.60 |
| 2025-02-14 | OH, YOON AH | VP, General Counsel & Corp Sec | Sale | 1,978 | — | — |
| 2025-02-14 | OH, YOON AH | VP, General Counsel & Corp Sec | Buy | 3,956 | — | — |
| 2025-02-14 | OH, YOON AH | VP, General Counsel & Corp Sec | Sale | 1,830 | $176.55 | $323086.50 |
| 2025-02-14 | OH, YOON AH | VP, General Counsel & Corp Sec | Sale | 493 | $176.55 | $87039.15 |
| 2025-02-13 | VEDULA, SRINIVAS | SVP, Customer Success | Sale | 238 | $169.58 | $40360.04 |
| 2025-02-10 | VEDULA, SRINIVAS | SVP, Customer Success | Sale | 816 | — | — |
| 2025-02-10 | VEDULA, SRINIVAS | SVP, Customer Success | Buy | 1,632 | — | — |
Frequently asked questions
Are ONTO insiders buying or selling?
Over the transactions on record, ONTO insiders have been net buyers, with about $11.02M in stock sold across 48 sales. The entries tagged as buys are stock grants and option exercises recorded at $0, not open-market purchases.
Does insider selling at ONTO mean the stock will fall?
Not by itself. Most executive selling is pre-scheduled through 10b5-1 plans filed months in advance, and insiders sell for diversification, taxes, and liquidity far more often than out of any view on the price. Insider buying is the stronger signal, especially when several insiders buy around the same time, because there is usually only one reason to put personal cash into the stock.
Which ONTO insiders are selling the most?
Recent selling is concentrated in a few names. PLISINSKI, MICHAEL P accounts for the largest share on record, with about $7.37M sold. Selling by one or two individuals matters less than broad selling across the whole leadership team, which is the pattern worth watching.