Onto Innovation Ownership & Insider Activity

Onto Innovation (ONTO) institutional and insider ownership, recent insider transactions and ownership breakdown.

Insiders own 4.8% of shares outstanding. Institutional investors hold 77.2%. Over the past 90 days, insiders made 2 sales worth $902K.

Shares Outstanding

61.123M

Shares Float

50.659M

Insider Shares Owned

2.963M

Insider % Owned

4.8%

Institutional Shares Held

37.888M

Institutional % Held

77.2%

Ownership Breakdown

Net Insider Activity by Month

Purchases (90d)

Sales (90d)

$902K total

Net Activity

Net Selling

Net Value (90d)

-$902K

Onto Innovation Insider Transactions (Last 6 Months)

Date	Insider	Title	Type	Shares	Price	Value
Sep 29, 2026	David B. Miller	DIRECTOR	SELL	2.000K	$300.00	$600K
Aug 21, 2026	Susan Lynch	DIRECTOR	SELL	1.000K	$302.30	$302K

Date	Member	Party	Chamber	Action	Amount
May 12, 2025	Robert Bresnahan	R	House	Sale	$1,001 - $15,000
May 9, 2025	Robert Bresnahan	R	House	Sale (Partial)	$1,001 - $15,000