Mark Slicer Onto Innovation Inc. (ONTO) insider trading activity

Mark Slicer is Chief Financial Officer of ONTO INNOVATION INC.. Currently has a direct ownership of 13,640 shares of ONTO, which is worth approximately $1.28 Million. The most recent transaction as insider was on May 17, 2025, when has been sold 2,066 shares (Common Stock) at a price of $99.4 per share, resulting in proceeds of $205,360. This information was disclosed in a Form 4 filing with the Securities and Exchange Commission (SEC).

Shares Held (Direct Ownership) 13.6K

4.11% 3M change

4.35% 12M change

Total Value Held $1.28 Million

Mark Slicer Transaction History

Date	Transaction	Value	Shares Traded	Shares Held
May 17 2025	SELL Payment of exercise price or tax liability	$205,360 $99.4 p/Share	2,066 Reduced 13.15%	13,640 Common Stock
Mar 03 2025	BUY Grant, award, or other acquisition	-	2,941 Added 15.77%	15,706 Common Stock
Mar 01 2025	SELL Payment of exercise price or tax liability	$48,941 $145.66 p/Share	336 Reduced 2.56%	12,765 Common Stock
Feb 14 2025	SELL Payment of exercise price or tax liability	$423,013 $176.55 p/Share	2,396 Reduced 15.46%	13,101 Common Stock
Feb 14 2025	BUY Exercise of conversion of derivative security	-	4,564 Added 22.75%	15,497 Common Stock
Nov 15 2024	SELL Open market or private sale	$176,451 $160.41 p/Share	1,100 Reduced 9.14%	10,933 Common Stock
Jun 07 2024	SELL Open market or private sale	$112,711 $217.17 p/Share	519 Reduced 4.13%	12,033 Common Stock
Jun 06 2024	SELL Open market or private sale	$114,807 $221.21 p/Share	519 Reduced 3.97%	12,552 Common Stock
May 17 2024	SELL Payment of exercise price or tax liability	$364,975 $223.5 p/Share	1,633 Reduced 11.11%	13,071 Common Stock
Mar 01 2024	BUY Grant, award, or other acquisition	-	2,077 Added 12.38%	14,704 Common Stock
Feb 14 2024	SELL Payment of exercise price or tax liability	$83,770 $173.08 p/Share	484 Reduced 3.69%	12,627 Common Stock
Sep 15 2023	SELL Open market or private sale	$376,346 $125.24 p/Share	3,005 Reduced 18.65%	13,111 Common Stock
May 17 2023	SELL Payment of exercise price or tax liability	$124,298 $97.95 p/Share	1,269 Reduced 7.3%	16,116 Common Stock
Feb 14 2023	BUY Grant, award, or other acquisition	-	4,564 Added 20.79%	17,385 Common Stock
May 17 2022	BUY Grant, award, or other acquisition	-	12,821 Added 50.0%	12,821 Common Stock

Mark Slicer

Chief Financial Officer

Wilmington, MA

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