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Port Capital’s Onto Innovation ONTO Stock Holding History

Port Capital’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
2025
Q3 		– Sell
-156,556
Closed -$15.8M – 87
2025
Q2 		$15.8M Sell
156,556
-37,545
-19% -$4.01M 0.67% 35
2025
Q1 		$23.6M Sell
194,101
-22,545
-10% -$3.8M 1.07% 34
2024
Q4 		$36.1M Buy
216,646
+2,475
+1% +$452K 1.65% 28
2024
Q3 		$44.5M Sell
214,171
-29,050
-12% -$5.86M 1.99% 22
2024
Q2 		$53.4M Buy
243,221
+325
+0.1% +$67.2K 2.68% 15
2024
Q1 		$44M Sell
242,896
-55,460
-19% -$9.37M 2.2% 20
2023
Q4 		$45.6M Buy
298,356
+1,337
+0.5% +$180K 2.54% 18
2023
Q3 		$37.9M Sell
297,019
-22,175
-7% -$2.64M 2.36% 20
2023
Q2 		$37.2M Buy
319,194
+15,625
+5% +$1.49M 2.24% 21
2023
Q1 		$26.7M Buy
303,569
+22,250
+8% +$1.8M 1.73% 26
2022
Q4 		$19.2M Sell
281,319
-202,667
-42% -$14.6M 1.38% 27
2022
Q3 		$31M Buy
483,986
+102,557
+27% +$7.53M 2.52% 18
2022
Q2 		$26.6M Buy
381,429
+36,925
+11% +$2.73M 2.08% 21
2022
Q1 		$29.9M Buy
344,504
+10,850
+3% +$965K 2.07% 21
2021
Q4 		$33.8M Buy
+333,654
New +$28.8M 2.08% 20

Other funds holding ONTO

Vanguard Group
Vanguard Group Malvern, Pennsylvania $6.9T AUM 27.45% 1-Year Est. Return
BlackRock
BlackRock New York $5.72T AUM 30.48% 1-Year Est. Return
William Blair Investment Management
William Blair Investment Management Chicago, Illinois $30.3B AUM 33.75% 1-Year Est. Return
State Street
State Street Boston, Massachusetts $2.9T AUM 29.55% 1-Year Est. Return
Wellington Management Group
Wellington Management Group Boston, Massachusetts $535B AUM 26.23% 1-Year Est. Return
Franklin Resources
Franklin Resources San Mateo, California $408B AUM 30.18% 1-Year Est. Return
PCMI
Paradigm Capital Management Inc Albany, New York $2.61B AUM 78.58% 1-Year Est. Return
GCM
Geneva Capital Management Milwaukee, Wisconsin $4.71B AUM 6.32% 1-Year Est. Return
D.E. Shaw & Co
D.E. Shaw & Co New York $166B AUM 43.98% 1-Year Est. Return
VOYA Investment Management
VOYA Investment Management Atlanta, Georgia $96.1B AUM 40.06% 1-Year Est. Return

Port Capital's ONTO Position: Q3 2025 in Review

Port Capital sold out of Onto Innovation (ONTO) in Q3 2025, closing a stake of 156,556 shares — an estimated $15.8M sold.

Port Capital first reported a position in ONTO in Q4 2021 and held it in 15 quarters. The position peaked at $53.4M in Q2 2024. 476 funds tracked by Wall St. Rank hold ONTO as of Q3 2025.

  • Port Capital reported no remaining Onto Innovation position as of Q3 2025 after selling out during the quarter.
  • Port Capital sold 156,556 Onto Innovation shares in Q3 2025, an estimated $15.8M.
  • Port Capital first reported a position in Onto Innovation in Q4 2021 and held it in 15 quarters.
  • Port Capital's Onto Innovation position peaked at $53.4M in Q2 2024.
  • 476 funds tracked by Wall St. Rank held Onto Innovation as of Q3 2025.

Based on Port Capital's 13F filing for Q3 2025, filed 14 Nov 2025.