Yoon Ah Oh

CIK: 0001889970

Transaction Breakdown

Open Market Buys (P)0 (0.0%)

High conviction signal

Open Market Sales (S)0 (0.0%)

Position reduction

Option Exercises (M)4 (21.1%)

Derivative conversions

Awards (A)2 (10.5%)

Compensation grants

Other (G, F, J, C, D, …)13 (68.4%)

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

Companies & Roles (1)

ONTO

ONTO INNOVATION INC.

Officer

Discretionary Trading P&L

Holdings

Transaction History (19 total)

ONTO
ONTO INNOVATION INC.
May 15, 2026
Tax Payment(F)
Direct
530 shares at avg. $271.77$144K
ONTO
ONTO INNOVATION INC.
Mar 3, 2026
Tax Payment(F)
Direct
417 shares at avg. $207.50$87K
ONTO
ONTO INNOVATION INC.
Mar 2, 2026
Award(A)
Direct
2.4K shares-
ONTO
ONTO INNOVATION INC.
Mar 1, 2026
Exercise(M)
Direct
724 shares-
ONTO
ONTO INNOVATION INC.
Mar 1, 2026
Tax Payment(F)
Direct
267 shares at avg. $215.89$58K
ONTO
ONTO INNOVATION INC.
Mar 1, 2026
Tax Payment(F)
Direct
307 shares at avg. $215.89$66K
ONTO
ONTO INNOVATION INC.
Feb 14, 2026
Tax Payment(F)
Direct
1.1K shares at avg. $217.23$238K
ONTO
ONTO INNOVATION INC.
Feb 14, 2026
Tax Payment(F)
Direct
501 shares at avg. $217.23$109K
ONTO
ONTO INNOVATION INC.
Feb 14, 2026
Exercise(M)
Direct
3.1K shares-
ONTO
ONTO INNOVATION INC.
May 15, 2025
Tax Payment(F)
Direct
603 shares at avg. $98.04$59K
ONTO
ONTO INNOVATION INC.
Mar 3, 2025
Award(A)
Direct
2.9K shares-
ONTO
ONTO INNOVATION INC.
Mar 1, 2025
Tax Payment(F)
Direct
304 shares at avg. $145.66$44K
ONTO
ONTO INNOVATION INC.
Feb 14, 2025
Exercise(M)
Direct
4K shares-
ONTO
ONTO INNOVATION INC.
Feb 14, 2025
Tax Payment(F)
Direct
493 shares at avg. $176.55$87K
ONTO
ONTO INNOVATION INC.
Feb 14, 2025
Tax Payment(F)
Direct
1.8K shares at avg. $176.55$323K
ONTO
ONTO INNOVATION INC.
Feb 10, 2025
Exercise(M)
Direct
2.7K shares-
ONTO
ONTO INNOVATION INC.
Feb 10, 2025
Tax Payment(F)
Direct
1K shares at avg. $183.28$186K
ONTO
ONTO INNOVATION INC.
Feb 10, 2025
Tax Payment(F)
Direct
375 shares at avg. $183.28$69K
ONTO
ONTO INNOVATION INC.
Oct 25, 2024
Tax Payment(F)
Direct
1.3K shares at avg. $204.39$265K

		Type	Shares	Price		Ownership
May 15, 2026	ONTO ONTO INNOVATION INC.	Tax Payment(F)	530	$271.77	$144,038	Direct
Mar 3, 2026	ONTO ONTO INNOVATION INC.	Tax Payment(F)	417	$207.50	$86,528	Direct
Mar 2, 2026	ONTO ONTO INNOVATION INC.	Award(A)	2,408	-	$0	Direct
Mar 1, 2026	ONTO ONTO INNOVATION INC.	Exercise(M)	724	-	$0	Direct
Mar 1, 2026	ONTO ONTO INNOVATION INC.	Tax Payment(F)	267	$215.89	$57,643	Direct
Mar 1, 2026	ONTO ONTO INNOVATION INC.	Tax Payment(F)	307	$215.89	$66,278	Direct
Feb 14, 2026	ONTO ONTO INNOVATION INC.	Tax Payment(F)	1,094	$217.23	$237,650	Direct
Feb 14, 2026	ONTO ONTO INNOVATION INC.	Tax Payment(F)	501	$217.23	$108,832	Direct
Feb 14, 2026	ONTO ONTO INNOVATION INC.	Exercise(M)	3,084	-	$0	Direct
May 15, 2025	ONTO ONTO INNOVATION INC.	Tax Payment(F)	603	$98.04	$59,118	Direct
Mar 3, 2025	ONTO ONTO INNOVATION INC.	Award(A)	2,941	-	-	Direct
Mar 1, 2025	ONTO ONTO INNOVATION INC.	Tax Payment(F)	304	$145.66	$44,281	Direct
Feb 14, 2025	ONTO ONTO INNOVATION INC.	Exercise(M)	3,956	-	-	Direct
Feb 14, 2025	ONTO ONTO INNOVATION INC.	Tax Payment(F)	493	$176.55	$87,039	Direct
Feb 14, 2025	ONTO ONTO INNOVATION INC.	Tax Payment(F)	1,830	$176.55	$323,087	Direct
Feb 10, 2025	ONTO ONTO INNOVATION INC.	Exercise(M)	2,720	-	-	Direct
Feb 10, 2025	ONTO ONTO INNOVATION INC.	Tax Payment(F)	1,016	$183.28	$186,212	Direct
Feb 10, 2025	ONTO ONTO INNOVATION INC.	Tax Payment(F)	375	$183.28	$68,730	Direct
Oct 25, 2024	ONTO ONTO INNOVATION INC.	Tax Payment(F)	1,296	$204.39	$264,889	Direct

1-19 of 19 transactions

About OH Yoon Ah

OH Yoon Ah (SEC CIK 0001889970) files insider reports with the SEC as SVP, Gen Counsel & Corp Sec of ONTO INNOVATION INC. (ONTO).

Signal8 holds 10 ownership filings by OH Yoon Ah, all Form 4s, filed between Oct 28, 2024 and May 18, 2026. Those filings report 19 transactions, from Oct 25, 2024 to May 15, 2026. Signal8's Form 4 history starts in Sep 2024.

The business address on OH Yoon Ah's filings is in WILMINGTON, MA.

Recent filings by OH Yoon Ah

May 15, 2026: Tax withholding of ONTO shares (Form 4, code F).
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: Option exercise of ONTO shares (Form 4, code M).
Mar 1, 2026: Tax withholdings of ONTO shares (2 lines, 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