ONTO

insider transactions

ONTO INNOVATION INC. — buys & sells by directors, officers and 10% owners (SEC Form 4).

30D 90D 1Y

No open-market buys or sells this period. The trades below are grants, option exercises and gifts, which carry no market price.

Net buy / sell volume

Tap or hover the chart for daily net volume. Green = net buying, red = net selling.

All transactions

Grant·A
May 20, 26

May Su

Director

$0

761 sh

Own +11%
Grant·A
May 20, 26

Stephen S Schwartz

Director

$0

761 sh

Own +27%
Grant·A
May 20, 26

Christopher A Seams

Director

$0

761 sh

Own +2%
Grant·A
May 20, 26

David Brian Miller

Director

$0

761 sh

Own +6%
Grant·A
May 20, 26

Susan D Lynch

Director

$0

761 sh

Own +26%
Grant·A
May 20, 26

Stephen Douglas Kelley

Director

$0

761 sh

Own +14%
Other·F
May 15, 26

Ramil Yaldaei

Chief Operating Officer

$169.9K

625 sh · $271.77

Own -3%
Other·F
May 15, 26

Ramil Yaldaei

Chief Operating Officer

$59.2K

218 sh · $271.77

Own -1%
Other·F
May 15, 26

Yoon Ah Oh

SVP, Gen Counsel & Corp Sec

$144.0K

530 sh · $271.77

Own -2%
Other·F
Mar 3, 26

Ramil Yaldaei

Chief Operating Officer

$127.6K

615 sh · $207.50

Own -3%
Other·F
Mar 3, 26

Plisinski Michael P KEY

Chief Executive Officer

$776.5K

3.7K sh · $207.50

Own -2%
Other·F
Mar 3, 26

Yoon Ah Oh

SVP, Gen Counsel & Corp Sec

$86.5K

417 sh · $207.50

Own -2%
Other·F
Mar 3, 26

Ido Dolev

EVP, Prod Solutions Grp

$169.9K

819 sh · $207.50

Own -3%
Grant·A
Mar 2, 26

Ramil Yaldaei

Chief Operating Officer

$0

1.5K sh

Own New
Grant·A
Mar 2, 26

Ramil Yaldaei

Chief Operating Officer

$0

7.7K sh

Own +68%
Grant·A
Mar 2, 26

Plisinski Michael P KEY

Chief Executive Officer

$0

7.2K sh

Own New
Grant·A
Mar 2, 26

Plisinski Michael P KEY

Chief Executive Officer

$0

14.5K sh

Own +9%
Grant·A
Mar 2, 26

Brian K Roberts KEY

Chief Financial Officer

$0

1.5K sh

Own New
Grant·A
Mar 2, 26

Brian K Roberts KEY

Chief Financial Officer

$0

3.1K sh

Own +15%
Grant·A
Mar 2, 26

Yoon Ah Oh

SVP, Gen Counsel & Corp Sec

$0

1.2K sh

Own New
Grant·A
Mar 2, 26

Yoon Ah Oh

SVP, Gen Counsel & Corp Sec

$0

2.4K sh

Own +12%
Grant·A
Mar 2, 26

Ido Dolev

EVP, Prod Solutions Grp

$0

1.7K sh

Own New
Grant·A
Mar 2, 26

Ido Dolev

EVP, Prod Solutions Grp

$0

3.4K sh

Own +14%
Grant·A
Mar 2, 26

Shirley Chen

SVP Customer Success

$0

1.3K sh

Own New
Grant·A
Mar 2, 26

Shirley Chen

SVP Customer Success

$0

2.5K sh

Own +19%
Exercise·M
Mar 1, 26

Ramil Yaldaei

Chief Operating Officer

$0

844 sh

Own New
Other·F
Mar 1, 26

Ramil Yaldaei

Chief Operating Officer

$59.6K

276 sh · $215.89

Own -2%
Other·F
Mar 1, 26

Ramil Yaldaei

Chief Operating Officer

$74.9K

347 sh · $215.89

Own -3%
Exercise·M
Mar 1, 26

Ramil Yaldaei

Chief Operating Officer

$0

649 sh

Own +6%
Exercise·M
Mar 1, 26

Plisinski Michael P KEY

Chief Executive Officer

$0

6.0K sh

Own New
Other·F
Mar 1, 26

Plisinski Michael P KEY

Chief Executive Officer

$415.6K

1.9K sh · $215.89

Own -1%
Other·F
Mar 1, 26

Plisinski Michael P KEY

Chief Executive Officer

$479.7K

2.2K sh · $215.89

Own -1%
Exercise·M
Mar 1, 26

Plisinski Michael P KEY

Chief Executive Officer

$0

4.6K sh

Own +3%
Exercise·M
Mar 1, 26

Yoon Ah Oh

SVP, Gen Counsel & Corp Sec

$0

941 sh

Own New
Other·F
Mar 1, 26

Yoon Ah Oh

SVP, Gen Counsel & Corp Sec

$57.6K

267 sh · $215.89

Own -1%
Other·F
Mar 1, 26

Yoon Ah Oh

SVP, Gen Counsel & Corp Sec

$66.3K

307 sh · $215.89

Own -2%
Exercise·M
Mar 1, 26

Yoon Ah Oh

SVP, Gen Counsel & Corp Sec

$0

724 sh

Own +4%
Exercise·M
Feb 14, 26

Plisinski Michael P KEY

Chief Executive Officer

$0

11.8K sh

Own New
Other·F
Feb 14, 26

Plisinski Michael P KEY

Chief Executive Officer

$789.0K

3.6K sh · $217.23

Own -2%
Other·F
Feb 14, 26

Plisinski Michael P KEY

Chief Executive Officer

$1.9M

8.9K sh · $217.23

Own -5%
Exercise·M
Feb 14, 26

Plisinski Michael P KEY

Chief Executive Officer

$0

18.4K sh

Own +11%
Exercise·M
Feb 14, 26

Yoon Ah Oh

SVP, Gen Counsel & Corp Sec

$0

2.0K sh

Own New
Other·F
Feb 14, 26

Yoon Ah Oh

SVP, Gen Counsel & Corp Sec

$108.8K

501 sh · $217.23

Own -3%
Other·F
Feb 14, 26

Yoon Ah Oh

SVP, Gen Counsel & Corp Sec

$237.6K

1.1K sh · $217.23

Own -5%
Exercise·M
Feb 14, 26

Yoon Ah Oh

SVP, Gen Counsel & Corp Sec

$0

3.1K sh

Own +17%

Date▾	Insider	Role	Type	Shares	Own Δ	Price	Value
May 20, 2026	May Su	Director	Grant A	761	+11%	—	$0
May 20, 2026	Stephen S Schwartz	Director	Grant A	761	+27%	—	$0
May 20, 2026	Christopher A Seams	Director	Grant A	761	+2%	—	$0
May 20, 2026	David Brian Miller	Director	Grant A	761	+6%	—	$0
May 20, 2026	Susan D Lynch	Director	Grant A	761	+26%	—	$0
May 20, 2026	Stephen Douglas Kelley	Director	Grant A	761	+14%	—	$0
May 15, 2026	Ramil Yaldaei	Chief Operating Officer	Other F	625	-3%	$271.77	$169.9K
May 15, 2026	Ramil Yaldaei	Chief Operating Officer	Other F	218	-1%	$271.77	$59.2K
May 15, 2026	Yoon Ah Oh	SVP, Gen Counsel & Corp Sec	Other F	530	-2%	$271.77	$144.0K
Mar 3, 2026	Ramil Yaldaei	Chief Operating Officer	Other F	615	-3%	$207.50	$127.6K
Mar 3, 2026	Plisinski Michael P KEY	Chief Executive Officer	Other F	3.7K	-2%	$207.50	$776.5K
Mar 3, 2026	Yoon Ah Oh	SVP, Gen Counsel & Corp Sec	Other F	417	-2%	$207.50	$86.5K
Mar 3, 2026	Ido Dolev	EVP, Prod Solutions Grp	Other F	819	-3%	$207.50	$169.9K
Mar 2, 2026	Ramil Yaldaei	Chief Operating Officer	Grant A	1.5K	New	—	$0
Mar 2, 2026	Ramil Yaldaei	Chief Operating Officer	Grant A	7.7K	+68%	—	$0
Mar 2, 2026	Plisinski Michael P KEY	Chief Executive Officer	Grant A	7.2K	New	—	$0
Mar 2, 2026	Plisinski Michael P KEY	Chief Executive Officer	Grant A	14.5K	+9%	—	$0
Mar 2, 2026	Brian K Roberts KEY	Chief Financial Officer	Grant A	1.5K	New	—	$0
Mar 2, 2026	Brian K Roberts KEY	Chief Financial Officer	Grant A	3.1K	+15%	—	$0
Mar 2, 2026	Yoon Ah Oh	SVP, Gen Counsel & Corp Sec	Grant A	1.2K	New	—	$0
Mar 2, 2026	Yoon Ah Oh	SVP, Gen Counsel & Corp Sec	Grant A	2.4K	+12%	—	$0
Mar 2, 2026	Ido Dolev	EVP, Prod Solutions Grp	Grant A	1.7K	New	—	$0
Mar 2, 2026	Ido Dolev	EVP, Prod Solutions Grp	Grant A	3.4K	+14%	—	$0
Mar 2, 2026	Shirley Chen	SVP Customer Success	Grant A	1.3K	New	—	$0
Mar 2, 2026	Shirley Chen	SVP Customer Success	Grant A	2.5K	+19%	—	$0
Mar 1, 2026	Ramil Yaldaei	Chief Operating Officer	Exercise M	844	New	—	$0
Mar 1, 2026	Ramil Yaldaei	Chief Operating Officer	Other F	276	-2%	$215.89	$59.6K
Mar 1, 2026	Ramil Yaldaei	Chief Operating Officer	Other F	347	-3%	$215.89	$74.9K
Mar 1, 2026	Ramil Yaldaei	Chief Operating Officer	Exercise M	649	+6%	—	$0
Mar 1, 2026	Plisinski Michael P KEY	Chief Executive Officer	Exercise M	6.0K	New	—	$0
Mar 1, 2026	Plisinski Michael P KEY	Chief Executive Officer	Other F	1.9K	-1%	$215.89	$415.6K
Mar 1, 2026	Plisinski Michael P KEY	Chief Executive Officer	Other F	2.2K	-1%	$215.89	$479.7K
Mar 1, 2026	Plisinski Michael P KEY	Chief Executive Officer	Exercise M	4.6K	+3%	—	$0
Mar 1, 2026	Yoon Ah Oh	SVP, Gen Counsel & Corp Sec	Exercise M	941	New	—	$0
Mar 1, 2026	Yoon Ah Oh	SVP, Gen Counsel & Corp Sec	Other F	267	-1%	$215.89	$57.6K
Mar 1, 2026	Yoon Ah Oh	SVP, Gen Counsel & Corp Sec	Other F	307	-2%	$215.89	$66.3K
Mar 1, 2026	Yoon Ah Oh	SVP, Gen Counsel & Corp Sec	Exercise M	724	+4%	—	$0
Feb 14, 2026	Plisinski Michael P KEY	Chief Executive Officer	Exercise M	11.8K	New	—	$0
Feb 14, 2026	Plisinski Michael P KEY	Chief Executive Officer	Other F	3.6K	-2%	$217.23	$789.0K
Feb 14, 2026	Plisinski Michael P KEY	Chief Executive Officer	Other F	8.9K	-5%	$217.23	$1.9M
Feb 14, 2026	Plisinski Michael P KEY	Chief Executive Officer	Exercise M	18.4K	+11%	—	$0
Feb 14, 2026	Yoon Ah Oh	SVP, Gen Counsel & Corp Sec	Exercise M	2.0K	New	—	$0
Feb 14, 2026	Yoon Ah Oh	SVP, Gen Counsel & Corp Sec	Other F	501	-3%	$217.23	$108.8K
Feb 14, 2026	Yoon Ah Oh	SVP, Gen Counsel & Corp Sec	Other F	1.1K	-5%	$217.23	$237.6K
Feb 14, 2026	Yoon Ah Oh	SVP, Gen Counsel & Corp Sec	Exercise M	3.1K	+17%	—	$0

About ONTO insider trading

This page tracks insider transactions for ONTO INNOVATION INC. (ONTO) reported to the U.S. Securities and Exchange Commission on Form 4. Corporate insiders — directors, executive officers and beneficial owners of more than 10% of the stock — must disclose their trades within two business days. Open-market purchases (code P) and sales (code S) made at the insider's discretion are the most-watched opportunistic signals, while awards (A), option exercises (M) and tax-withholding (F) reflect compensation rather than conviction. Trades marked 10b5-1 were made under a pre-arranged plan and are considered routine. A cluster buy — several insiders buying within a short window — is historically a stronger bullish indicator than any single trade.