SEC 13F Intelligence

William Blair Investment Management, LLC / ONTO

William Blair Investment Management, LLC’s Onto Innovation Inc Position

Does William Blair Investment Management, LLC own Onto Innovation Inc (ONTO)? Yes — 964.2K shares worth $198M (+0.65% of its 13F portfolio) as of Q1 2026, down from 1.73M shares the prior filed quarter.

Position Value
$198M
Q1 2026
Shares
964.2K
% of Portfolio
+0.65%
Quarters Held
10
currently held

Position History ONTO

Reported value by quarter
Q2 ’23: $35MQ2 ’23Q3 ’23: $45MQ4 ’23: $53MQ4 ’23Q1 ’24: $58MQ2 ’24: $20MQ2 ’24Q1 ’25: $18MQ2 ’25: $111MQ2 ’25Q3 ’25: $256MQ4 ’25: $273MQ4 ’25Q1 ’26: $198Mfilingsflow.com
QuarterSharesValue% of Portfolio
Q1 2026964.2K$198M+0.65%
Q4 20251.73M$273M+0.76%
Q3 20251.98M$256M+0.66%
Q2 20251.10M$111M+0.29%
Q1 2025146.4K$18M+0.05%
Q2 202491.5K$20M+0.05%
Q1 2024318.8K$58M+0.15%
Q4 2023346.8K$53M+0.15%
Q3 2023354.6K$45M+0.15%
Q2 2023298.6K$35M+0.11%

Common-stock position only; options are excluded. Quarters where the fund filed no 13F or reported no position are absent. See William Blair Investment Management, LLC’s full portfolio or all institutional holders of ONTO.