Westfield Capital Management’s Onto Innovation ONTO Stock Holding History

Westfield Capital 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	$113M	Sell	299,383 -27,577	-8%	-$7.8M	0.37%	77
2026 Q1	$67M	Sell	326,960 -156,122	-32%	-$32M	0.28%	116
2025 Q4	$76.3M	Buy	483,082 +8,552	+2%	+$1.21M	0.32%	102
2025 Q3	$61.3M	Buy	474,530 +123,466	+35%	+$13.2M	0.26%	119
2025 Q2	$35.4M	Buy	351,064 +147,498	+72%	+$15.8M	0.15%	171
2025 Q1	$24.7M	Sell	203,566 -76,617	-27%	-$12.9M	0.12%	167
2024 Q4	$46.7M	Buy	+280,183	New	+$51.2M	0.2%	142
2023 Q3	–	Sell	-226,199	Closed	-$26.3M	–	245
2023 Q2	$26.3M	Sell	226,199 -75,814	-25%	-$7.23M	0.17%	158
2023 Q1	$26.5M	Buy	+302,013	New	+$24.5M	0.19%	155

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

Westfield Capital Management's ONTO Position: Q2 2026 in Review

Westfield Capital Management reduced its Onto Innovation (ONTO) stake by 8.4% in Q2 2026, selling an estimated $7.8M and leaving 299,383 shares worth $113M. The position accounts for 0.37% of the portfolio, ranked #77.

Westfield Capital Management first reported a position in ONTO in Q1 2023 and has held it in 9 quarters since. 688 funds tracked by Wall St. Rank hold ONTO as of Q2 2026.

Westfield Capital Management held 299,383 shares of Onto Innovation worth $113M as of Q2 2026.
Westfield Capital Management sold 27,577 Onto Innovation shares in Q2 2026, an estimated $7.8M.
Onto Innovation made up 0.37% of Westfield Capital Management's portfolio in Q2 2026, its #77 holding.
Westfield Capital Management first reported a position in Onto Innovation in Q1 2023 and has held it in 9 quarters since.
688 funds tracked by Wall St. Rank held Onto Innovation as of Q2 2026.

Based on Westfield Capital Management's 13F filing for Q2 2026, filed 12 Aug 2026.