A detailed history of William Blair Investment Management, LLC transactions in Onto Innovation Inc. stock. As of the latest transaction made, William Blair Investment Management, LLC holds 1,981,761 shares of ONTO stock, worth $254 Million. This represents 0.72% of its overall portfolio holdings.

Number of Shares
1,981,761
Previous 1,098,860 80.35%
Holding current value
$254 Million
Previous $111 Million 130.9%
% of portfolio
0.72%
Previous 0.32%

Shares

8 transactions
Quarter Operation Price Per share shares change shares Held SEC Form
Q3 2025

Nov 12, 2025

BUY
$90.0 - $136.73 $79.5 Million - $121 Million
882,901 Added 80.35%
1,981,761 $256 Million
Q2 2025

Jul 29, 2025

BUY
$88.5 - $133.37 $84.3 Million - $127 Million
952,419 Added 650.38%
1,098,860 $111 Million
Q1 2025

May 09, 2025

BUY
$121.34 - $224.5 $17.8 Million - $32.9 Million
146,441 New
146,441 $17.8 Million
Q2 2024

Aug 08, 2024

SELL
$169.39 - $233.63 $38.5 Million - $53.1 Million
-227,268 Reduced 71.29%
91,513 $20.1 Million
Q1 2024

May 08, 2024

SELL
$136.19 - $196.61 $3.82 Million - $5.52 Million
-28,065 Reduced 8.09%
318,781 $57.7 Million
Q4 2023

Feb 09, 2024

SELL
$111.16 - $156.7 $856,710 - $1.21 Million
-7,707 Reduced 2.17%
346,846 $53 Million
Q3 2023

Nov 09, 2023

BUY
$104.84 - $138.98 $5.87 Million - $7.78 Million
55,969 Added 18.74%
354,553 $45.2 Million
Q2 2023

Aug 10, 2023

BUY
$78.5 - $116.47 $23.4 Million - $34.8 Million
298,584 New
298,584 $34.8 Million

Others Institutions Holding ONTO

About ONTO INNOVATION INC.


  • Ticker ONTO
  • Exchange NYSE
  • Sector Technology
  • Industry Semiconductor Equipment & Materials
  • Shares Outstandng 49,680,800
  • Market Cap $6.36B
  • Description
  • Onto Innovation Inc. engages in the design, development, manufacture, and support of process control tools that performs macro defect inspection and 2D/3D optical metrology, lithography systems, and process control analytical software worldwide. It offers process and yield management solutions, and device packaging and test facilities through st...
More about ONTO
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