Michael P. Plisinski

CIK: 0001325550

Transaction Breakdown

Open Market Buys (P)0 (0.0%)

High conviction signal

Open Market Sales (S)5 (22.7%)

Position reduction

Option Exercises (M)4 (18.2%)

Derivative conversions

Awards (A)2 (9.1%)

Compensation grants

Other (G, F, J, C, D, …)11 (50.0%)

Gifts, tax withholding, conversions, dispositions to the issuer and other codes

Companies & Roles (1)

ONTO

ONTO INNOVATION INC.

DirectorOfficer

Discretionary Trading P&L

Holdings

Transaction History (22 total)

ONTO
ONTO INNOVATION INC.
Mar 3, 2026
Tax Payment(F)
Direct
3.7K shares at avg. $207.50$776K
ONTO
ONTO INNOVATION INC.
Mar 2, 2026
Award(A)
Direct
14.5K shares-
ONTO
ONTO INNOVATION INC.
Mar 1, 2026
Tax Payment(F)
Direct
1.9K shares at avg. $215.89$416K
ONTO
ONTO INNOVATION INC.
Mar 1, 2026
Exercise(M)
Direct
4.6K shares-
ONTO
ONTO INNOVATION INC.
Mar 1, 2026
Tax Payment(F)
Direct
2.2K shares at avg. $215.89$480K
ONTO
ONTO INNOVATION INC.
Feb 14, 2026
Exercise(M)
Direct
18.4K shares-
ONTO
ONTO INNOVATION INC.
Feb 14, 2026
Tax Payment(F)
Direct
3.6K shares at avg. $217.23$789K
ONTO
ONTO INNOVATION INC.
Feb 14, 2026
Tax Payment(F)
Direct
8.9K shares at avg. $217.23$1.9M
ONTO
ONTO INNOVATION INC.
Dec 24, 2025
Gift(G)
Direct
25K shares-
ONTO
ONTO INNOVATION INC.
Mar 3, 2025
Award(A)
Direct
23.2K shares-
ONTO
ONTO INNOVATION INC.
Mar 1, 2025
Tax Payment(F)
Direct
1.9K shares at avg. $145.66$280K
ONTO
ONTO INNOVATION INC.
Feb 14, 2025
Tax Payment(F)
Direct
3.8K shares at avg. $176.55$673K
ONTO
ONTO INNOVATION INC.
Feb 14, 2025
Tax Payment(F)
Direct
11.4K shares at avg. $176.55$2.0M
ONTO
ONTO INNOVATION INC.
Feb 14, 2025
Exercise(M)
Direct
23.7K shares-
ONTO
ONTO INNOVATION INC.
Feb 10, 2025
Tax Payment(F)
Direct
9.2K shares at avg. $183.28$1.7M
ONTO
ONTO INNOVATION INC.
Feb 10, 2025
Tax Payment(F)
Direct
2.9K shares at avg. $183.28$524K
ONTO
ONTO INNOVATION INC.
Feb 10, 2025
Exercise(M)
Direct
19K shares-
ONTO
ONTO INNOVATION INC.
Jan 21, 2025
Sale(S)
Direct
35K shares at avg. $219.19$7.7M
ONTO
ONTO INNOVATION INC.
Jan 16, 2025
Sale(S)
Direct
29.9K shares at avg. $211.24$6.3M
ONTO
ONTO INNOVATION INC.
Jan 16, 2025
Sale(S)
Direct
100 shares at avg. $212.11$21K
ONTO
ONTO INNOVATION INC.
Jan 14, 2025
Sale(S)
Direct
18.3K shares at avg. $200.09$3.7M
ONTO
ONTO INNOVATION INC.
Jan 14, 2025
Sale(S)
Direct
1.7K shares at avg. $201.26$349K

		Type	Shares	Price		Ownership
Mar 3, 2026	ONTO ONTO INNOVATION INC.	Tax Payment(F)	3,742	$207.50	$776,465	Direct
Mar 2, 2026	ONTO ONTO INNOVATION INC.	Award(A)	14,479	-	$0	Direct
Mar 1, 2026	ONTO ONTO INNOVATION INC.	Tax Payment(F)	1,925	$215.89	$415,588	Direct
Mar 1, 2026	ONTO ONTO INNOVATION INC.	Exercise(M)	4,597	-	$0	Direct
Mar 1, 2026	ONTO ONTO INNOVATION INC.	Tax Payment(F)	2,222	$215.89	$479,708	Direct
Feb 14, 2026	ONTO ONTO INNOVATION INC.	Exercise(M)	18,445	-	$0	Direct
Feb 14, 2026	ONTO ONTO INNOVATION INC.	Tax Payment(F)	3,632	$217.23	$788,979	Direct
Feb 14, 2026	ONTO ONTO INNOVATION INC.	Tax Payment(F)	8,919	$217.23	$1,937,474	Direct
Dec 24, 2025	ONTO ONTO INNOVATION INC.	Gift(G)	25,000	-	-	Direct
Mar 3, 2025	ONTO ONTO INNOVATION INC.	Award(A)	23,212	-	-	Direct
Mar 1, 2025	ONTO ONTO INNOVATION INC.	Tax Payment(F)	1,925	$145.66	$280,396	Direct
Feb 14, 2025	ONTO ONTO INNOVATION INC.	Tax Payment(F)	3,812	$176.55	$673,009	Direct
Feb 14, 2025	ONTO ONTO INNOVATION INC.	Tax Payment(F)	11,435	$176.55	$2,018,849	Direct
Feb 14, 2025	ONTO ONTO INNOVATION INC.	Exercise(M)	23,650	-	-	Direct
Feb 10, 2025	ONTO ONTO INNOVATION INC.	Tax Payment(F)	9,210	$183.28	$1,688,009	Direct
Feb 10, 2025	ONTO ONTO INNOVATION INC.	Tax Payment(F)	2,859	$183.28	$523,998	Direct
Feb 10, 2025	ONTO ONTO INNOVATION INC.	Exercise(M)	19,048	-	-	Direct
Jan 21, 2025	ONTO ONTO INNOVATION INC.	Sale(S)	35,000	$219.19	$7,671,650	Direct
Jan 16, 2025	ONTO ONTO INNOVATION INC.	Sale(S)	29,900	$211.24	$6,316,076	Direct
Jan 16, 2025	ONTO ONTO INNOVATION INC.	Sale(S)	100	$212.11	$21,211	Direct
Jan 14, 2025	ONTO ONTO INNOVATION INC.	Sale(S)	18,268	$200.09	$3,655,244	Direct
Jan 14, 2025	ONTO ONTO INNOVATION INC.	Sale(S)	1,732	$201.26	$348,582	Direct

1-22 of 22 transactions

About Plisinski Michael P

Plisinski Michael P (SEC CIK 0001325550) files insider reports with the SEC as Chief Executive Officer of ONTO INNOVATION INC. (ONTO).

Signal8 holds 11 ownership filings by Plisinski Michael P, all Form 4s, filed between Jan 16, 2025 and Mar 4, 2026. Those filings report 22 transactions, from Jan 14, 2025 to Mar 3, 2026. Signal8's Form 4 history starts in Sep 2024.

The business address on Plisinski Michael P's filings is in WILMINGTON, MA.

Recent filings by Plisinski Michael P

Mar 3, 2026: Tax withholding of ONTO shares (Form 4, code F).
Mar 2, 2026: Grant or award of ONTO shares (Form 4, code A).
Mar 1, 2026: Tax withholding of ONTO shares (Form 4, code F).
Mar 1, 2026: Option exercise of ONTO shares (Form 4, code M).
Mar 1, 2026: Tax withholding of ONTO shares (Form 4, code F).

Other insiders filing for ONTO INNOVATION INC. (ONTO)

MILLER DAVID BRIAN, Director
ROBERTS BRIAN K, Chief Financial Officer
Chen Shirley, Senior Vice President of Custo
Lynch Susan D, Director
Su May, Director
SEAMS CHRISTOPHER A, Director

How to read Form 4 transaction codes