ONTO INNOVATION INC

Ticker: ONTO CUSIP: 683344105 Class: EQTY

Weiss Asset Management LP's Holding History (CIK: 0001357550)

Note: Option positions (PUT/CALL) are excluded.

Q3 2025

Shares 42,907 Value ($000) $5,544 Avg Close $107.03 Range $89.40 - $142.77

Q4 2023

Shares 83,412 Value ($000) $12,754 Avg Close $134.52 Range $108.98 - $158.50

Q3 2023

Shares 110,000 Value ($000) $14,027 Avg Close $118.86 Range $103.94 - $142.26

Q2 2023

Shares 205,031 Value ($000) $23,880 Avg Close $95.40 Range $76.40 - $117.99

Q1 2023

Shares 159,947 Value ($000) $14,056 Avg Close $81.11 Range $67.55 - $89.75

Q4 2022

Shares 75,000 Value ($000) $5,107 Avg Close $71.84 Range $56.02 - $86.86

Period	Shares	Value ($000)	Average Close	Price Range
Q3 2025	42,907	$5,544	$107.03	$89.40 - $142.77
Q4 2023	83,412	$12,754	$134.52	$108.98 - $158.50
Q3 2023	110,000	$14,027	$118.86	$103.94 - $142.26
Q2 2023	205,031	$23,880	$95.40	$76.40 - $117.99
Q1 2023	159,947	$14,056	$81.11	$67.55 - $89.75
Q4 2022	75,000	$5,107	$71.84	$56.02 - $86.86