Weiss Asset Management’s Onto Innovation ONTO Stock Holding History

Weiss Asset Management’s Portfolio ONTO Stock Details ONTO Fund Activity

Bought

Maintained

Sold

Quarter	Market Value	Status	Shares	Change in Stake	Trade Value	Portfolio Weight	Portfolio Position
2026 Q2	$12.2M	Buy	+32,130	New	+$9.09M	0.13%	124
2025 Q4	–	Sell	-42,907	Closed	-$5.54M	–	773
2025 Q3	$5.54M	Buy	+42,907	New	+$4.59M	0.06%	148
2024 Q1	–	Sell	-83,412	Closed	-$12.8M	–	457
2023 Q4	$12.8M	Sell	83,412 -26,588	-24%	-$3.58M	0.61%	49
2023 Q3	$14M	Sell	110,000 -95,031	-46%	-$11.3M	0.83%	29
2023 Q2	$23.9M	Buy	205,031 +45,084	+28%	+$4.3M	1.83%	12
2023 Q1	$14.1M	Buy	159,947 +84,947	+113%	+$6.89M	0.9%	25
2022 Q4	$5.11M	Buy	+75,000	New	+$5.39M	0.21%	136

Other funds holding ONTO

BlackRock New York $6.73T AUM 46.02% 1-Year Est. Return

Vanguard Portfolio Management Malvern, Pennsylvania $2.22T AUM

Vanguard Capital Management Malvern, Pennsylvania $4.68T AUM

State Street Boston, Massachusetts $3.37T AUM 44.26% 1-Year Est. Return

Geode Capital Management Boston, Massachusetts $1.88T AUM 44.46% 1-Year Est. Return

Invesco Atlanta, Georgia $1.26T AUM 61.52% 1-Year Est. Return

PCMI

Paradigm Capital Management Inc Albany, New York $3.67B AUM 121.12% 1-Year Est. Return

Point72 Asset Management Stamford, Connecticut $90.7B AUM 77.13% 1-Year Est. Return

Fidelity Investments Boston, Massachusetts $2.3T AUM 54.33% 1-Year Est. Return

T. Rowe Price Associates Baltimore, Maryland $999B AUM 46.22% 1-Year Est. Return

Weiss Asset Management's ONTO Position: Q2 2026 in Review

Weiss Asset Management opened a new position in Onto Innovation (ONTO) in Q2 2026: 32,130 shares worth $12.2M. The stake represents 0.13% of the portfolio and ranks #124 among its holdings. This is a return to the name: Weiss Asset Management previously reported a position in ONTO as recently as Q3 2025.

Weiss Asset Management first reported a position in ONTO in Q4 2022 and has held it in 7 quarters since. The position peaked at $23.9M in Q2 2023. 690 funds tracked by Wall St. Rank hold ONTO as of Q2 2026.

Weiss Asset Management held 32,130 shares of Onto Innovation worth $12.2M as of Q2 2026.
Onto Innovation was a new Weiss Asset Management position in Q2 2026.
Onto Innovation made up 0.13% of Weiss Asset Management's portfolio in Q2 2026, its #124 holding.
Weiss Asset Management first reported a position in Onto Innovation in Q4 2022 and has held it in 7 quarters since.
Weiss Asset Management's Onto Innovation position peaked at $23.9M in Q2 2023.
690 funds tracked by Wall St. Rank held Onto Innovation as of Q2 2026.

Based on Weiss Asset Management's 13F filing for Q2 2026, filed 14 Aug 2026.