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Castleark Management’s Onto Innovation ONTO Stock Holding History

Castleark 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 		– Sell
-29,030
Closed -$5.95M – 337
2026
Q1 		$5.95M Sell
29,030
-13,940
-32% -$2.85M 0.2% 130
2025
Q4 		$6.78M Buy
+42,970
New +$6.1M 0.2% 124
2024
Q3 		– Sell
-26,780
Closed -$5.88M – 298
2024
Q2 		$5.88M Sell
26,780
-13,960
-34% -$2.89M 0.24% 96
2024
Q1 		$7.38M Sell
40,740
-10,050
-20% -$1.7M 0.31% 66
2023
Q4 		$7.77M Sell
50,790
-50
-0.1% -$6.73K 0.34% 59
2023
Q3 		$6.48M Buy
50,840
+13,180
+35% +$1.57M 0.33% 60
2023
Q2 		$4.39M Buy
+37,660
New +$3.59M 0.2% 120

Other funds holding ONTO

BlackRock
BlackRock New York $6.73T AUM 46.02% 1-Year Est. Return
Vanguard Portfolio Management
Vanguard Portfolio Management Malvern, Pennsylvania $2.22T AUM
Vanguard Capital Management
Vanguard Capital Management Malvern, Pennsylvania $4.68T AUM
State Street
State Street Boston, Massachusetts $3.37T AUM 44.26% 1-Year Est. Return
Geode Capital Management
Geode Capital Management Boston, Massachusetts $1.88T AUM 44.46% 1-Year Est. Return
Invesco
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
Point72 Asset Management Stamford, Connecticut $90.7B AUM 77.13% 1-Year Est. Return
Fidelity Investments
Fidelity Investments Boston, Massachusetts $2.3T AUM 54.33% 1-Year Est. Return
T. Rowe Price Associates
T. Rowe Price Associates Baltimore, Maryland $999B AUM 46.22% 1-Year Est. Return

Castleark Management's ONTO Position: Q2 2026 in Review

Castleark Management sold out of Onto Innovation (ONTO) in Q2 2026, closing a stake of 29,030 shares — an estimated $5.95M sold.

Castleark Management first reported a position in ONTO in Q2 2023 and held it in 7 quarters. The position peaked at $7.77M in Q4 2023. 690 funds tracked by Wall St. Rank hold ONTO as of Q2 2026.

  • Castleark Management reported no remaining Onto Innovation position as of Q2 2026 after selling out during the quarter.
  • Castleark Management sold 29,030 Onto Innovation shares in Q2 2026, an estimated $5.95M.
  • Castleark Management first reported a position in Onto Innovation in Q2 2023 and held it in 7 quarters.
  • Castleark Management's Onto Innovation position peaked at $7.77M in Q4 2023.
  • 690 funds tracked by Wall St. Rank held Onto Innovation as of Q2 2026.

Based on Castleark Management's 13F filing for Q2 2026, filed 14 Aug 2026.