KELLEY, STEPHEN DOUGLAS
Director
- Shares
- 761
- % company
- <0.01%
- Price
- Not reported
- Value
- Not reported
Filed May 20, 2026
Methodology published · Market data, model notes, and corrections process are public · Data policy · Corrections policy
NYSE · TECHNOLOGY · Holders
Onto Innovation Inc (ONTO) Institutional Ownership & Insider Trading History
Recent insider purchases and sales for ONTO from Form 4 filings. Institutional holdings surface here when ownership sources publish.
Section freshness
Price Jun 26, 4:00 PM EDT · Statements Mar 30, 8:00 PM EDT
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Data freshness
Prices update fastest. Fundamentals, analyst data, and news update on their own schedules, so check these timestamps before comparing signals.
Price time means the latest available trade or regular-market close. Other times show when that section was checked or published.
PriceLive
Last traded •
Source: Market data provider
Fundamentalsevery 1 hr
Provider checked •
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Analystevery 1 hr
Provider checked •
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Newsevery 15 min
Latest item •
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Ownership read
ONTO insider sentiment: Mixed, buy-heavy.
66 sales and 54 purchases appear in the recent Form 4 filings. Use the filters below to separate real buying and selling from option exercises, gifts, awards, and tax withholding.
Insider flow
ONTO
Purchases272.40K
Sales239.26K
Directional bars ignore awards, gifts, conversions, and tax withholding rows.
Top holder
—
Institutional data pending
Insider stance
Mixed, buy-heavy
$32.71M sold / — bought
Latest filing
May 20, 2026
Most recent holder or insider filing date
Filings shown
120
0 holder / 120 insider
- Holder rows
- Pending
- Market data source
- Latest filing
- May 20, 2026
- Most recent holder or insider filing date
- Increased / initiated
- Pending
- 0 decreased
- Insider rows
- 120
- Market data source
Recent insider transactions
Onto Innovation Inc (ONTO) Form 4 filings
Action codes are translated so open-market buys and sales are separate from awards, gifts, conversions, and tax withholding.
SEAMS, CHRISTOPHER A
Director
- Shares
- 761
- % company
- <0.01%
- Price
- Not reported
- Value
- Not reported
Filed May 20, 2026
LYNCH, SUSAN D
Director
- Shares
- 761
- % company
- <0.01%
- Price
- Not reported
- Value
- Not reported
Filed May 20, 2026
SU, MAY
Director
- Shares
- 761
- % company
- <0.01%
- Price
- Not reported
- Value
- Not reported
Filed May 20, 2026
SCHWARTZ, STEPHEN S
Director
- Shares
- 761
- % company
- <0.01%
- Price
- Not reported
- Value
- Not reported
Filed May 20, 2026
MILLER, DAVID BRIAN
Director
- Shares
- 761
- % company
- <0.01%
- Price
- Not reported
- Value
- Not reported
Filed May 20, 2026
YALDAEI, RAMIL
Chief Operating Officer
- Shares
- 218
- % company
- <0.01%
- Price
- $271.77
- Value
- $59,246
Filed May 15, 2026
YALDAEI, RAMIL
Chief Operating Officer
- Shares
- 625
- % company
- <0.01%
- Price
- $271.77
- Value
- $169,856
Filed May 15, 2026
OH, YOON AH
SVP, Gen Counsel & Corp Sec
- Shares
- 530
- % company
- <0.01%
- Price
- $271.77
- Value
- $144,038
Filed May 15, 2026
OH, YOON AH
SVP, Gen Counsel & Corp Sec
- Shares
- 417
- % company
- <0.01%
- Price
- $207.50
- Value
- $86,528
Filed Mar 3, 2026
PLISINSKI, MICHAEL P
Director, Chief Executive Officer
- Shares
- 3.74K
- % company
- <0.01%
- Price
- $207.50
- Value
- $776,465
Filed Mar 3, 2026
YALDAEI, RAMIL
Chief Operating Officer
- Shares
- 615
- % company
- <0.01%
- Price
- $207.50
- Value
- $127,613
Filed Mar 3, 2026
DOLEV, IDO
EVP, Prod Solutions Grp
- Shares
- 819
- % company
- <0.01%
- Price
- $207.50
- Value
- $169,943
Filed Mar 3, 2026
ROBERTS, BRIAN K
Chief Financial Officer
- Shares
- 1.55K
- % company
- <0.01%
- Price
- Not reported
- Value
- Not reported
Filed Mar 2, 2026
DOLEV, IDO
EVP, Prod Solutions Grp
- Shares
- 3.44K
- % company
- <0.01%
- Price
- Not reported
- Value
- Not reported
Filed Mar 2, 2026
DOLEV, IDO
EVP, Prod Solutions Grp
- Shares
- 1.72K
- % company
- <0.01%
- Price
- Not reported
- Value
- Not reported
Filed Mar 2, 2026
YALDAEI, RAMIL
Chief Operating Officer
- Shares
- 7.68K
- % company
- 0.02%
- Price
- Not reported
- Value
- Not reported
Filed Mar 2, 2026
YALDAEI, RAMIL
Chief Operating Officer
- Shares
- 1.55K
- % company
- <0.01%
- Price
- Not reported
- Value
- Not reported
Filed Mar 2, 2026
PLISINSKI, MICHAEL P
Director, Chief Executive Officer
- Shares
- 14.48K
- % company
- 0.03%
- Price
- Not reported
- Value
- Not reported
Filed Mar 2, 2026
PLISINSKI, MICHAEL P
Director, Chief Executive Officer
- Shares
- 7.24K
- % company
- 0.01%
- Price
- Not reported
- Value
- Not reported
Filed Mar 2, 2026
ROBERTS, BRIAN K
Chief Financial Officer
- Shares
- 3.10K
- % company
- <0.01%
- Price
- Not reported
- Value
- Not reported
Filed Mar 2, 2026
OH, YOON AH
SVP, Gen Counsel & Corp Sec
- Shares
- 2.41K
- % company
- <0.01%
- Price
- Not reported
- Value
- Not reported
Filed Mar 2, 2026
CHEN, SHIRLEY
SVP Customer Success
- Shares
- 1.26K
- % company
- <0.01%
- Price
- Not reported
- Value
- Not reported
Filed Mar 2, 2026
CHEN, SHIRLEY
SVP Customer Success
- Shares
- 2.52K
- % company
- <0.01%
- Price
- Not reported
- Value
- Not reported
Filed Mar 2, 2026
OH, YOON AH
SVP, Gen Counsel & Corp Sec
- Shares
- 1.20K
- % company
- <0.01%
- Price
- Not reported
- Value
- Not reported
Filed Mar 2, 2026
OH, YOON AH
SVP, Gen Counsel & Corp Sec
- Shares
- 941
- % company
- <0.01%
- Price
- Not reported
- Value
- Not reported
Filed Mar 1, 2026
OH, YOON AH
SVP, Gen Counsel & Corp Sec
- Shares
- 267
- % company
- <0.01%
- Price
- $215.89
- Value
- $57,643
Filed Mar 1, 2026
OH, YOON AH
SVP, Gen Counsel & Corp Sec
- Shares
- 307
- % company
- <0.01%
- Price
- $215.89
- Value
- $66,278
Filed Mar 1, 2026
OH, YOON AH
SVP, Gen Counsel & Corp Sec
- Shares
- 724
- % company
- <0.01%
- Price
- Not reported
- Value
- Not reported
Filed Mar 1, 2026
PLISINSKI, MICHAEL P
Director, Chief Executive Officer
- Shares
- 5.97K
- % company
- 0.01%
- Price
- Not reported
- Value
- Not reported
Filed Mar 1, 2026
PLISINSKI, MICHAEL P
Director, Chief Executive Officer
- Shares
- 1.93K
- % company
- <0.01%
- Price
- $215.89
- Value
- $415,588
Filed Mar 1, 2026
PLISINSKI, MICHAEL P
Director, Chief Executive Officer
- Shares
- 2.22K
- % company
- <0.01%
- Price
- $215.89
- Value
- $479,708
Filed Mar 1, 2026
YALDAEI, RAMIL
Chief Operating Officer
- Shares
- 844
- % company
- <0.01%
- Price
- Not reported
- Value
- Not reported
Filed Mar 1, 2026
YALDAEI, RAMIL
Chief Operating Officer
- Shares
- 276
- % company
- <0.01%
- Price
- $215.89
- Value
- $59,586
Filed Mar 1, 2026
PLISINSKI, MICHAEL P
Director, Chief Executive Officer
- Shares
- 4.60K
- % company
- <0.01%
- Price
- Not reported
- Value
- Not reported
Filed Mar 1, 2026
YALDAEI, RAMIL
Chief Operating Officer
- Shares
- 347
- % company
- <0.01%
- Price
- $215.89
- Value
- $74,914
Filed Mar 1, 2026
YALDAEI, RAMIL
Chief Operating Officer
- Shares
- 649
- % company
- <0.01%
- Price
- Not reported
- Value
- Not reported
Filed Mar 1, 2026
PLISINSKI, MICHAEL P
Director, Chief Executive Officer
- Shares
- 18.45K
- % company
- 0.04%
- Price
- Not reported
- Value
- Not reported
Filed Feb 14, 2026
OH, YOON AH
SVP, Gen Counsel & Corp Sec
- Shares
- 1.98K
- % company
- <0.01%
- Price
- Not reported
- Value
- Not reported
Filed Feb 14, 2026
OH, YOON AH
SVP, Gen Counsel & Corp Sec
- Shares
- 501
- % company
- <0.01%
- Price
- $217.23
- Value
- $108,832
Filed Feb 14, 2026
OH, YOON AH
SVP, Gen Counsel & Corp Sec
- Shares
- 1.09K
- % company
- <0.01%
- Price
- $217.23
- Value
- $237,650
Filed Feb 14, 2026
OH, YOON AH
SVP, Gen Counsel & Corp Sec
- Shares
- 3.08K
- % company
- <0.01%
- Price
- Not reported
- Value
- Not reported
Filed Feb 14, 2026
PLISINSKI, MICHAEL P
Director, Chief Executive Officer
- Shares
- 11.82K
- % company
- 0.02%
- Price
- Not reported
- Value
- Not reported
Filed Feb 14, 2026
PLISINSKI, MICHAEL P
Director, Chief Executive Officer
- Shares
- 3.63K
- % company
- <0.01%
- Price
- $217.23
- Value
- $788,979
Filed Feb 14, 2026
PLISINSKI, MICHAEL P
Director, Chief Executive Officer
- Shares
- 8.92K
- % company
- 0.02%
- Price
- $217.23
- Value
- $1,937,474
Filed Feb 14, 2026
PLISINSKI, MICHAEL P
Director, Chief Executive Officer
- Shares
- 25.00K
- % company
- 0.05%
- Price
- Not reported
- Value
- Not reported
Filed Dec 24, 2025
DOLEV, IDO
EVP, Prod Solutions Grp
- Shares
- 3.18K
- % company
- <0.01%
- Price
- $154.01
- Value
- $490,214
Filed Dec 2, 2025
YALDAEI, RAMIL
Chief Operating Officer
- Shares
- 594
- % company
- <0.01%
- Price
- $143.71
- Value
- $85,364
Filed Oct 3, 2025
CHEN, SHIRLEY
SVP, Customer Success
- Shares
- 12.99K
- % company
- 0.03%
- Price
- Not reported
- Value
- Not reported
Filed Sep 2, 2025
ROBERTS, BRIAN K
Chief Financial Officer
- Shares
- 21.18K
- % company
- 0.04%
- Price
- Not reported
- Value
- Not reported
Filed Sep 2, 2025
DOLEV, IDO
EVP, Prod Solutions Grp
- Shares
- 21.56K
- % company
- 0.04%
- Price
- Not reported
- Value
- Not reported
Filed Jun 2, 2025
DOLEV, IDO
EVP, Prod Solutions Grp
- Shares
- 2.69K
- % company
- <0.01%
- Price
- Not reported
- Value
- Not reported
Filed Jun 2, 2025
DOLEV, IDO
EVP, Prod Solutions Grp
- Shares
- 5.39K
- % company
- 0.01%
- Price
- Not reported
- Value
- Not reported
Filed Jun 2, 2025
SU, MAY
Director
- Shares
- 2.11K
- % company
- <0.01%
- Price
- Not reported
- Value
- Not reported
Filed May 21, 2025
LYNCH, SUSAN D
Director
- Shares
- 2.11K
- % company
- <0.01%
- Price
- Not reported
- Value
- Not reported
Filed May 21, 2025
MILLER, DAVID BRIAN
Director
- Shares
- 2.11K
- % company
- <0.01%
- Price
- Not reported
- Value
- Not reported
Filed May 21, 2025
SCHWARTZ, STEPHEN S
Director
- Shares
- 2.11K
- % company
- <0.01%
- Price
- Not reported
- Value
- Not reported
Filed May 21, 2025
SEAMS, CHRISTOPHER A
Director
- Shares
- 2.11K
- % company
- <0.01%
- Price
- Not reported
- Value
- Not reported
Filed May 21, 2025
KELLEY, STEPHEN DOUGLAS
Director
- Shares
- 2.11K
- % company
- <0.01%
- Price
- Not reported
- Value
- Not reported
Filed May 21, 2025
SLICER, MARK
Chief Financial Officer
- Shares
- 2.07K
- % company
- <0.01%
- Price
- $99.40
- Value
- $205,360
Filed May 17, 2025
OH, YOON AH
SVP, Gen Counsel & Corp Sec
- Shares
- 603
- % company
- <0.01%
- Price
- $98.04
- Value
- $59,118
Filed May 15, 2025
YALDAEI, RAMIL
Chief Operating Officer
- Shares
- 609
- % company
- <0.01%
- Price
- $98.04
- Value
- $59,706
Filed May 15, 2025
YALDAEI, RAMIL
Chief Operating Officer
- Shares
- 217
- % company
- <0.01%
- Price
- $98.04
- Value
- $21,275
Filed May 15, 2025
SLICER, MARK
Chief Financial Officer
- Shares
- 2.94K
- % company
- <0.01%
- Price
- Not reported
- Value
- Not reported
Filed Mar 3, 2025
SLICER, MARK
Chief Financial Officer
- Shares
- 1.47K
- % company
- <0.01%
- Price
- Not reported
- Value
- Not reported
Filed Mar 3, 2025
PLISINSKI, MICHAEL P
Director, CEO
- Shares
- 23.21K
- % company
- 0.05%
- Price
- Not reported
- Value
- Not reported
Filed Mar 3, 2025
PLISINSKI, MICHAEL P
Director, CEO
- Shares
- 11.61K
- % company
- 0.02%
- Price
- Not reported
- Value
- Not reported
Filed Mar 3, 2025
OH, YOON AH
SVP, Gen Counsel & Corp Sec
- Shares
- 2.94K
- % company
- <0.01%
- Price
- Not reported
- Value
- Not reported
Filed Mar 3, 2025
OH, YOON AH
SVP, Gen Counsel & Corp Sec
- Shares
- 1.47K
- % company
- <0.01%
- Price
- Not reported
- Value
- Not reported
Filed Mar 3, 2025
OH, YOON AH
SVP, Gen Counsel & Corp Sec
- Shares
- 1.47K
- % company
- <0.01%
- Price
- Not reported
- Value
- Not reported
Filed Mar 3, 2025
YALDAEI, RAMIL
Chief Operating Officer
- Shares
- 3.77K
- % company
- <0.01%
- Price
- Not reported
- Value
- Not reported
Filed Mar 3, 2025
YALDAEI, RAMIL
Chief Operating Officer
- Shares
- 1.88K
- % company
- <0.01%
- Price
- Not reported
- Value
- Not reported
Filed Mar 3, 2025
| # | Insider | % company | Action | Shares | Price | Value | Filing date |
|---|---|---|---|---|---|---|---|
| 1 | KELLEY, STEPHEN DOUGLAS Director | <0.01% | PurchaseOpen-market or direct purchase reported on Form 4. | 761 | Not reported | Not reported | May 20, 2026 |
| 2 | SEAMS, CHRISTOPHER A Director | <0.01% | PurchaseOpen-market or direct purchase reported on Form 4. | 761 | Not reported | Not reported | May 20, 2026 |
| 3 | LYNCH, SUSAN D Director | <0.01% | PurchaseOpen-market or direct purchase reported on Form 4. | 761 | Not reported | Not reported | May 20, 2026 |
| 4 | SU, MAY Director | <0.01% | PurchaseOpen-market or direct purchase reported on Form 4. | 761 | Not reported | Not reported | May 20, 2026 |
| 5 | SCHWARTZ, STEPHEN S Director | <0.01% | PurchaseOpen-market or direct purchase reported on Form 4. | 761 | Not reported | Not reported | May 20, 2026 |
| 6 | MILLER, DAVID BRIAN Director | <0.01% | PurchaseOpen-market or direct purchase reported on Form 4. | 761 | Not reported | Not reported | May 20, 2026 |
| 7 | YALDAEI, RAMIL Chief Operating Officer | <0.01% | SaleOpen-market or direct sale reported on Form 4. | 218 | $271.77 | $59,246 | May 15, 2026 |
| 8 | YALDAEI, RAMIL Chief Operating Officer | <0.01% | SaleOpen-market or direct sale reported on Form 4. | 625 | $271.77 | $169,856 | May 15, 2026 |
| 9 | OH, YOON AH SVP, Gen Counsel & Corp Sec | <0.01% | SaleOpen-market or direct sale reported on Form 4. | 530 | $271.77 | $144,038 | May 15, 2026 |
| 10 | OH, YOON AH SVP, Gen Counsel & Corp Sec | <0.01% | SaleOpen-market or direct sale reported on Form 4. | 417 | $207.50 | $86,528 | Mar 3, 2026 |
| 11 | PLISINSKI, MICHAEL P Director, Chief Executive Officer | <0.01% | SaleOpen-market or direct sale reported on Form 4. | 3.74K | $207.50 | $776,465 | Mar 3, 2026 |
| 12 | YALDAEI, RAMIL Chief Operating Officer | <0.01% | SaleOpen-market or direct sale reported on Form 4. | 615 | $207.50 | $127,613 | Mar 3, 2026 |
| 13 | DOLEV, IDO EVP, Prod Solutions Grp | <0.01% | SaleOpen-market or direct sale reported on Form 4. | 819 | $207.50 | $169,943 | Mar 3, 2026 |
| 14 | ROBERTS, BRIAN K Chief Financial Officer | <0.01% | PurchaseOpen-market or direct purchase reported on Form 4. | 1.55K | Not reported | Not reported | Mar 2, 2026 |
| 15 | DOLEV, IDO EVP, Prod Solutions Grp | <0.01% | PurchaseOpen-market or direct purchase reported on Form 4. | 3.44K | Not reported | Not reported | Mar 2, 2026 |
| 16 | DOLEV, IDO EVP, Prod Solutions Grp | <0.01% | PurchaseOpen-market or direct purchase reported on Form 4. | 1.72K | Not reported | Not reported | Mar 2, 2026 |
| 17 | YALDAEI, RAMIL Chief Operating Officer | 0.02% | PurchaseOpen-market or direct purchase reported on Form 4. | 7.68K | Not reported | Not reported | Mar 2, 2026 |
| 18 | YALDAEI, RAMIL Chief Operating Officer | <0.01% | PurchaseOpen-market or direct purchase reported on Form 4. | 1.55K | Not reported | Not reported | Mar 2, 2026 |
| 19 | PLISINSKI, MICHAEL P Director, Chief Executive Officer | 0.03% | PurchaseOpen-market or direct purchase reported on Form 4. | 14.48K | Not reported | Not reported | Mar 2, 2026 |
| 20 | PLISINSKI, MICHAEL P Director, Chief Executive Officer | 0.01% | PurchaseOpen-market or direct purchase reported on Form 4. | 7.24K | Not reported | Not reported | Mar 2, 2026 |
| 21 | ROBERTS, BRIAN K Chief Financial Officer | <0.01% | PurchaseOpen-market or direct purchase reported on Form 4. | 3.10K | Not reported | Not reported | Mar 2, 2026 |
| 22 | OH, YOON AH SVP, Gen Counsel & Corp Sec | <0.01% | PurchaseOpen-market or direct purchase reported on Form 4. | 2.41K | Not reported | Not reported | Mar 2, 2026 |
| 23 | CHEN, SHIRLEY SVP Customer Success | <0.01% | PurchaseOpen-market or direct purchase reported on Form 4. | 1.26K | Not reported | Not reported | Mar 2, 2026 |
| 24 | CHEN, SHIRLEY SVP Customer Success | <0.01% | PurchaseOpen-market or direct purchase reported on Form 4. | 2.52K | Not reported | Not reported | Mar 2, 2026 |
| 25 | OH, YOON AH SVP, Gen Counsel & Corp Sec | <0.01% | PurchaseOpen-market or direct purchase reported on Form 4. | 1.20K | Not reported | Not reported | Mar 2, 2026 |
| 26 | OH, YOON AH SVP, Gen Counsel & Corp Sec | <0.01% | SaleOpen-market or direct sale reported on Form 4. | 941 | Not reported | Not reported | Mar 1, 2026 |
| 27 | OH, YOON AH SVP, Gen Counsel & Corp Sec | <0.01% | SaleOpen-market or direct sale reported on Form 4. | 267 | $215.89 | $57,643 | Mar 1, 2026 |
| 28 | OH, YOON AH SVP, Gen Counsel & Corp Sec | <0.01% | SaleOpen-market or direct sale reported on Form 4. | 307 | $215.89 | $66,278 | Mar 1, 2026 |
| 29 | OH, YOON AH SVP, Gen Counsel & Corp Sec | <0.01% | PurchaseOpen-market or direct purchase reported on Form 4. | 724 | Not reported | Not reported | Mar 1, 2026 |
| 30 | PLISINSKI, MICHAEL P Director, Chief Executive Officer | 0.01% | SaleOpen-market or direct sale reported on Form 4. | 5.97K | Not reported | Not reported | Mar 1, 2026 |
| 31 | PLISINSKI, MICHAEL P Director, Chief Executive Officer | <0.01% | SaleOpen-market or direct sale reported on Form 4. | 1.93K | $215.89 | $415,588 | Mar 1, 2026 |
| 32 | PLISINSKI, MICHAEL P Director, Chief Executive Officer | <0.01% | SaleOpen-market or direct sale reported on Form 4. | 2.22K | $215.89 | $479,708 | Mar 1, 2026 |
| 33 | YALDAEI, RAMIL Chief Operating Officer | <0.01% | SaleOpen-market or direct sale reported on Form 4. | 844 | Not reported | Not reported | Mar 1, 2026 |
| 34 | YALDAEI, RAMIL Chief Operating Officer | <0.01% | SaleOpen-market or direct sale reported on Form 4. | 276 | $215.89 | $59,586 | Mar 1, 2026 |
| 35 | PLISINSKI, MICHAEL P Director, Chief Executive Officer | <0.01% | PurchaseOpen-market or direct purchase reported on Form 4. | 4.60K | Not reported | Not reported | Mar 1, 2026 |
| 36 | YALDAEI, RAMIL Chief Operating Officer | <0.01% | SaleOpen-market or direct sale reported on Form 4. | 347 | $215.89 | $74,914 | Mar 1, 2026 |
| 37 | YALDAEI, RAMIL Chief Operating Officer | <0.01% | PurchaseOpen-market or direct purchase reported on Form 4. | 649 | Not reported | Not reported | Mar 1, 2026 |
| 38 | PLISINSKI, MICHAEL P Director, Chief Executive Officer | 0.04% | PurchaseOpen-market or direct purchase reported on Form 4. | 18.45K | Not reported | Not reported | Feb 14, 2026 |
| 39 | OH, YOON AH SVP, Gen Counsel & Corp Sec | <0.01% | SaleOpen-market or direct sale reported on Form 4. | 1.98K | Not reported | Not reported | Feb 14, 2026 |
| 40 | OH, YOON AH SVP, Gen Counsel & Corp Sec | <0.01% | SaleOpen-market or direct sale reported on Form 4. | 501 | $217.23 | $108,832 | Feb 14, 2026 |
| 41 | OH, YOON AH SVP, Gen Counsel & Corp Sec | <0.01% | SaleOpen-market or direct sale reported on Form 4. | 1.09K | $217.23 | $237,650 | Feb 14, 2026 |
| 42 | OH, YOON AH SVP, Gen Counsel & Corp Sec | <0.01% | PurchaseOpen-market or direct purchase reported on Form 4. | 3.08K | Not reported | Not reported | Feb 14, 2026 |
| 43 | PLISINSKI, MICHAEL P Director, Chief Executive Officer | 0.02% | SaleOpen-market or direct sale reported on Form 4. | 11.82K | Not reported | Not reported | Feb 14, 2026 |
| 44 | PLISINSKI, MICHAEL P Director, Chief Executive Officer | <0.01% | SaleOpen-market or direct sale reported on Form 4. | 3.63K | $217.23 | $788,979 | Feb 14, 2026 |
| 45 | PLISINSKI, MICHAEL P Director, Chief Executive Officer | 0.02% | SaleOpen-market or direct sale reported on Form 4. | 8.92K | $217.23 | $1,937,474 | Feb 14, 2026 |
| 46 | PLISINSKI, MICHAEL P Director, Chief Executive Officer | 0.05% | SaleOpen-market or direct sale reported on Form 4. | 25.00K | Not reported | Not reported | Dec 24, 2025 |
| 47 | DOLEV, IDO EVP, Prod Solutions Grp | <0.01% | SaleOpen-market or direct sale reported on Form 4. | 3.18K | $154.01 | $490,214 | Dec 2, 2025 |
| 48 | YALDAEI, RAMIL Chief Operating Officer | <0.01% | SaleOpen-market or direct sale reported on Form 4. | 594 | $143.71 | $85,364 | Oct 3, 2025 |
| 49 | CHEN, SHIRLEY SVP, Customer Success | 0.03% | PurchaseOpen-market or direct purchase reported on Form 4. | 12.99K | Not reported | Not reported | Sep 2, 2025 |
| 50 | ROBERTS, BRIAN K Chief Financial Officer | 0.04% | PurchaseOpen-market or direct purchase reported on Form 4. | 21.18K | Not reported | Not reported | Sep 2, 2025 |
| 51 | DOLEV, IDO EVP, Prod Solutions Grp | 0.04% | PurchaseOpen-market or direct purchase reported on Form 4. | 21.56K | Not reported | Not reported | Jun 2, 2025 |
| 52 | DOLEV, IDO EVP, Prod Solutions Grp | <0.01% | PurchaseOpen-market or direct purchase reported on Form 4. | 2.69K | Not reported | Not reported | Jun 2, 2025 |
| 53 | DOLEV, IDO EVP, Prod Solutions Grp | 0.01% | PurchaseOpen-market or direct purchase reported on Form 4. | 5.39K | Not reported | Not reported | Jun 2, 2025 |
| 54 | SU, MAY Director | <0.01% | PurchaseOpen-market or direct purchase reported on Form 4. | 2.11K | Not reported | Not reported | May 21, 2025 |
| 55 | LYNCH, SUSAN D Director | <0.01% | PurchaseOpen-market or direct purchase reported on Form 4. | 2.11K | Not reported | Not reported | May 21, 2025 |
| 56 | MILLER, DAVID BRIAN Director | <0.01% | PurchaseOpen-market or direct purchase reported on Form 4. | 2.11K | Not reported | Not reported | May 21, 2025 |
| 57 | SCHWARTZ, STEPHEN S Director | <0.01% | PurchaseOpen-market or direct purchase reported on Form 4. | 2.11K | Not reported | Not reported | May 21, 2025 |
| 58 | SEAMS, CHRISTOPHER A Director | <0.01% | PurchaseOpen-market or direct purchase reported on Form 4. | 2.11K | Not reported | Not reported | May 21, 2025 |
| 59 | KELLEY, STEPHEN DOUGLAS Director | <0.01% | PurchaseOpen-market or direct purchase reported on Form 4. | 2.11K | Not reported | Not reported | May 21, 2025 |
| 60 | SLICER, MARK Chief Financial Officer | <0.01% | SaleOpen-market or direct sale reported on Form 4. | 2.07K | $99.40 | $205,360 | May 17, 2025 |
| 61 | OH, YOON AH SVP, Gen Counsel & Corp Sec | <0.01% | SaleOpen-market or direct sale reported on Form 4. | 603 | $98.04 | $59,118 | May 15, 2025 |
| 62 | YALDAEI, RAMIL Chief Operating Officer | <0.01% | SaleOpen-market or direct sale reported on Form 4. | 609 | $98.04 | $59,706 | May 15, 2025 |
| 63 | YALDAEI, RAMIL Chief Operating Officer | <0.01% | SaleOpen-market or direct sale reported on Form 4. | 217 | $98.04 | $21,275 | May 15, 2025 |
| 64 | SLICER, MARK Chief Financial Officer | <0.01% | PurchaseOpen-market or direct purchase reported on Form 4. | 2.94K | Not reported | Not reported | Mar 3, 2025 |
| 65 | SLICER, MARK Chief Financial Officer | <0.01% | PurchaseOpen-market or direct purchase reported on Form 4. | 1.47K | Not reported | Not reported | Mar 3, 2025 |
| 66 | PLISINSKI, MICHAEL P Director, CEO | 0.05% | PurchaseOpen-market or direct purchase reported on Form 4. | 23.21K | Not reported | Not reported | Mar 3, 2025 |
| 67 | PLISINSKI, MICHAEL P Director, CEO | 0.02% | PurchaseOpen-market or direct purchase reported on Form 4. | 11.61K | Not reported | Not reported | Mar 3, 2025 |
| 68 | OH, YOON AH SVP, Gen Counsel & Corp Sec | <0.01% | PurchaseOpen-market or direct purchase reported on Form 4. | 2.94K | Not reported | Not reported | Mar 3, 2025 |
| 69 | OH, YOON AH SVP, Gen Counsel & Corp Sec | <0.01% | PurchaseOpen-market or direct purchase reported on Form 4. | 1.47K | Not reported | Not reported | Mar 3, 2025 |
| 70 | OH, YOON AH SVP, Gen Counsel & Corp Sec | <0.01% | PurchaseOpen-market or direct purchase reported on Form 4. | 1.47K | Not reported | Not reported | Mar 3, 2025 |
| 71 | YALDAEI, RAMIL Chief Operating Officer | <0.01% | PurchaseOpen-market or direct purchase reported on Form 4. | 3.77K | Not reported | Not reported | Mar 3, 2025 |
| 72 | YALDAEI, RAMIL Chief Operating Officer | <0.01% | PurchaseOpen-market or direct purchase reported on Form 4. | 1.88K | Not reported | Not reported | Mar 3, 2025 |
Showing 72 of 120 matching Form 4 rows. Percent of company uses current shares outstanding when available.Load more insiders
Frequently asked
Common questions.
Who are the largest ONTO shareholders?
Onto Innovation Inc (ONTO) institutional holders are ranked by reported share count when ownership data publishes filing rows.
What is institutional ownership of ONTO?
Onto Innovation Inc (ONTO) institutional ownership appears when filing-based market data returns holder rows. TECHi does not fill unavailable ownership fields with placeholder shareholders.
Where can I see Onto Innovation Inc insider transactions?
Onto Innovation Inc (ONTO) has 120 Form 4 insider transactions on file, most recently on May 20, 2026, separated into purchases, sales, option exercises, awards, gifts, and tax withholding so administrative transactions are distinguished from open-market trades.
Are ONTO insiders buying or selling?
Recent ONTO insider activity reads Mixed, buy-heavy: 66 sales and 54 purchases. Awards, gifts, conversions, and tax withholding are listed separately because they do not carry the same signal as open-market trades.
Who is the most active ONTO insider?
PLISINSKI, MICHAEL P is the most active ONTO insider by absolute share movement, with 321,101 shares moving across the filing history. Review the action labels before treating that activity as buying or selling.