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Castleark Management’s ATI ATI Stock Holding History

Castleark Management’s Portfolio ATI Stock Details ATI Fund Activity
Bought
Maintained
Sold
Quarter Market Value Status Shares Change in
Stake 		Trade Value Portfolio Weight Portfolio Position
2026
Q2 		$952K Buy
+4,830
New +$819K 0.03% 241
2025
Q2 		– Sell
-30,700
Closed -$1.6M – 278
2025
Q1 		$1.6M Buy
+30,700
New +$1.74M 0.06% 199
2024
Q1 		– Sell
-174,540
Closed -$7.94M – 281
2023
Q4 		$7.94M Sell
174,540
-32,160
-16% -$1.34M 0.35% 56
2023
Q3 		$8.51M Sell
206,700
-41,530
-17% -$1.85M 0.43% 42
2023
Q2 		$11M Sell
248,230
-22,450
-8% -$859K 0.5% 38
2023
Q1 		$10.7M Hold
270,680
– – 0.52% 35
2022
Q4 		$8.08M Buy
270,680
+4,120
+2% +$121K 0.42% 53
2022
Q3 		$7.09M Sell
266,560
-6,190
-2% -$172K 0.39% 54
2022
Q2 		$6.19M Sell
272,750
-12,010
-4% -$317K 0.33% 62
2022
Q1 		$7.64M Buy
+284,760
New +$6.6M 0.33% 70
2019
Q2 		– Sell
-335,813
Closed -$8.59M – 353
2019
Q1 		$8.59M Buy
+335,813
New +$8.84M 0.32% 99
2018
Q3 		– Sell
-380,875
Closed -$9.57M – 379
2018
Q2 		$9.57M Buy
380,875
+32,585
+9% +$882K 0.29% 112
2018
Q1 		$8.25M Buy
+348,290
New +$9.34M 0.26% 121
2017
Q2 		– Sell
-474,835
Closed -$8.53M – 393
2017
Q1 		$8.53M Buy
+474,835
New +$8.93M 0.27% 120

Other funds holding ATI

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
Capital World Investors
Capital World Investors Los Angeles, California $846B AUM 46.74% 1-Year Est. Return
State Street
State Street Boston, Massachusetts $3.37T AUM 44.26% 1-Year Est. Return
Capital Research Global Investors
Capital Research Global Investors Los Angeles, California $717B AUM 35.42% 1-Year Est. Return
Fidelity Investments
Fidelity Investments Boston, Massachusetts $2.3T AUM 54.33% 1-Year Est. Return
Capital International Investors
Capital International Investors Los Angeles, California $484B AUM 34.9% 1-Year Est. Return
Invesco
Invesco Atlanta, Georgia $1.26T AUM 61.52% 1-Year Est. Return
Geode Capital Management
Geode Capital Management Boston, Massachusetts $1.88T AUM 44.46% 1-Year Est. Return

Castleark Management's ATI Position: Q2 2026 in Review

Castleark Management opened a new position in ATI (ATI) in Q2 2026: 4,830 shares worth $952K. The stake represents 0.03% of the portfolio and ranks #241 among its holdings. This is a return to the name: Castleark Management previously reported a position in ATI as recently as Q1 2025.

Castleark Management first reported a position in ATI in Q1 2017 and has held it in 14 quarters since. The position peaked at $11M in Q2 2023. 793 funds tracked by Wall St. Rank hold ATI as of Q2 2026.

  • Castleark Management held 4,830 shares of ATI worth $952K as of Q2 2026.
  • ATI was a new Castleark Management position in Q2 2026.
  • ATI made up 0.03% of Castleark Management's portfolio in Q2 2026, its #241 holding.
  • Castleark Management first reported a position in ATI in Q1 2017 and has held it in 14 quarters since.
  • Castleark Management's ATI position peaked at $11M in Q2 2023.
  • 793 funds tracked by Wall St. Rank held ATI as of Q2 2026.

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