Ardsley Advisory Partners’s Onto Innovation ONTO Stock Holding History

Ardsley Advisory Partners’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	$11.9M	Buy	+31,500	New	+$8.91M	1.24%	22
2026 Q1	–	Sell	-43,500	Closed	-$6.87M	–	189
2025 Q4	$6.87M	Buy	43,500 +3,000	+7%	+$426K	0.75%	47
2025 Q3	$5.23M	Buy	+40,500	New	+$4.33M	0.65%	56
2025 Q1	–	Sell	-21,400	Closed	-$3.57M	–	188
2024 Q4	$3.57M	Buy	21,400 +1,500	+8%	+$274K	0.57%	65
2024 Q3	$4.13M	Buy	19,900 +6,400	+47%	+$1.29M	0.68%	55
2024 Q2	$2.96M	Buy	+13,500	New	+$2.79M	0.44%	63

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

Ardsley Advisory Partners's ONTO Position: Q2 2026 in Review

Ardsley Advisory Partners opened a new position in Onto Innovation (ONTO) in Q2 2026: 31,500 shares worth $11.9M. The stake represents 1.24% of the portfolio and ranks #22 among its holdings. This is a return to the name: Ardsley Advisory Partners previously reported a position in ONTO as recently as Q4 2025.

Ardsley Advisory Partners first reported a position in ONTO in Q2 2024 and has held it in 6 quarters since. 690 funds tracked by Wall St. Rank hold ONTO as of Q2 2026.

Ardsley Advisory Partners held 31,500 shares of Onto Innovation worth $11.9M as of Q2 2026.
Onto Innovation was a new Ardsley Advisory Partners position in Q2 2026.
Onto Innovation made up 1.24% of Ardsley Advisory Partners's portfolio in Q2 2026, its #22 holding.
Ardsley Advisory Partners first reported a position in Onto Innovation in Q2 2024 and has held it in 6 quarters since.
690 funds tracked by Wall St. Rank held Onto Innovation as of Q2 2026.

Based on Ardsley Advisory Partners's 13F filing for Q2 2026, filed 13 Jul 2026.