OH Yoon Ah

Insider

SVP, Gen Counsel & Corp Sec

Trades at: ONTO

30D 90D 1Y

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

Trading track record · all companies

Running net of open-market buys − sells across every company. Tap the line or a marker for details. ▲ buy · ▼ sell.

Transactions · 365d

Open-market Buys Sells All types

No open-market buys or sells in this period — showing all activity (grants, exercises & gifts).

ONTO Other·F
May 15, 26

SVP, Gen Counsel & Corp Sec

$144.0K

530 sh · $271.77

Own -2%
ONTO Other·F
Mar 3, 26

SVP, Gen Counsel & Corp Sec

$86.5K

417 sh · $207.50

Own -2%
ONTO Grant·A
Mar 2, 26

SVP, Gen Counsel & Corp Sec

$0

2.4K sh · 2 lots

Own New
ONTO Grant·A
Mar 2, 26

SVP, Gen Counsel & Corp Sec

$0

2.4K sh

Own +12%
ONTO Exercise·M
Mar 1, 26

SVP, Gen Counsel & Corp Sec

$0

941 sh

Own New
ONTO Other·F
Mar 1, 26

SVP, Gen Counsel & Corp Sec

$123.9K

574 sh · $215.89 avg · 2 lots

Own -3%
ONTO Exercise·M
Mar 1, 26

SVP, Gen Counsel & Corp Sec

$0

724 sh

Own +4%
ONTO Exercise·M
Feb 14, 26

SVP, Gen Counsel & Corp Sec

$0

2.0K sh

Own New
ONTO Other·F
Feb 14, 26

SVP, Gen Counsel & Corp Sec

$346.5K

1.6K sh · $217.23 avg · 2 lots

Own -8%
ONTO Exercise·M
Feb 14, 26

SVP, Gen Counsel & Corp Sec

$0

3.1K sh

Own +17%

Date▾	Ticker	Role	Type	Shares	Own Δ	Price	Value
May 15, 2026	ONTO	SVP, Gen Counsel & Corp Sec	Other F	530	-2%	$271.77	$144.0K
Mar 3, 2026	ONTO	SVP, Gen Counsel & Corp Sec	Other F	417	-2%	$207.50	$86.5K
Mar 2, 2026	ONTO	SVP, Gen Counsel & Corp Sec	Grant A	2.4K2 lots	New	—	$0
Mar 2, 2026	ONTO	SVP, Gen Counsel & Corp Sec	Grant A	2.4K	+12%	—	$0
Mar 1, 2026	ONTO	SVP, Gen Counsel & Corp Sec	Exercise M	941	New	—	$0
Mar 1, 2026	ONTO	SVP, Gen Counsel & Corp Sec	Other F	5742 lots	-3%	$215.89 avg	$123.9K
Mar 1, 2026	ONTO	SVP, Gen Counsel & Corp Sec	Exercise M	724	+4%	—	$0
Feb 14, 2026	ONTO	SVP, Gen Counsel & Corp Sec	Exercise M	2.0K	New	—	$0
Feb 14, 2026	ONTO	SVP, Gen Counsel & Corp Sec	Other F	1.6K2 lots	-8%	$217.23 avg	$346.5K
Feb 14, 2026	ONTO	SVP, Gen Counsel & Corp Sec	Exercise M	3.1K	+17%	—	$0

Buy Sell Non-market (grant · exercise · gift)

About OH Yoon Ah

This profile aggregates every SEC Form 4 insider transaction reported by OH Yoon Ah across all companies they trade. Open-market purchases (code P) and sales (code S) are the highest-signal, discretionary trades; grants (A), option exercises (M) and gifts (G) reflect compensation rather than conviction and carry no market price. Figures cover the selected period and update as new filings are ingested.