Twin Tree Management
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Twin Tree Management’s ATI ATI Stock Holding History

Twin Tree 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
Q1 		– Sell
-232,100
Closed -$26.6M – 1278
2025
Q4 		$26.6M Sell
232,100
-160,600
-41% -$15.7M 0.23% 87
2025
Q3 		$31.9M Buy
392,700
+327,900
+506% +$26.6M 0.13% 172
2025
Q2 		$5.59M Buy
+64,800
New +$4.44M 0.01% 967

Other funds holding ATI

BlackRock
BlackRock New York $5.72T AUM 30.48% 1-Year Est. Return
Capital Research Global Investors
Capital Research Global Investors Los Angeles, California $645B AUM 30.41% 1-Year Est. Return
VCM
Vanguard Capital Management Malvern, Pennsylvania $4.04T AUM
Capital International Investors
Capital International Investors Los Angeles, California $427B AUM 29.17% 1-Year Est. Return
VPM
Vanguard Portfolio Management Malvern, Pennsylvania $1.91T AUM
Capital World Investors
Capital World Investors Los Angeles, California $733B AUM 35.63% 1-Year Est. Return
State Street
State Street Boston, Massachusetts $2.9T AUM 29.55% 1-Year Est. Return
Fidelity Investments
Fidelity Investments Boston, Massachusetts $1.9T AUM 41.92% 1-Year Est. Return
Invesco
Invesco Atlanta, Georgia $1.02T AUM 30.18% 1-Year Est. Return
Viking Global Investors
Viking Global Investors Stamford, Connecticut $35.7B AUM 21.3% 1-Year Est. Return

Twin Tree Management's ATI Position: Q1 2026 in Review

Twin Tree Management opened a new position in ATI (ATI) in Q1 2026: 14,980 shares worth $2.18M. The stake represents 0.05% of the portfolio and ranks #450 among its holdings. This is a return to the name: Twin Tree Management previously reported a position in ATI as recently as Q1 2025.

Twin Tree Management first reported a position in ATI in Q2 2023 and has held it in 5 quarters since. 673 funds tracked by Wall St. Rank hold ATI as of Q1 2026.

  • Twin Tree Management held 14,980 shares of ATI worth $2.18M as of Q1 2026.
  • ATI was a new Twin Tree Management position in Q1 2026.
  • ATI made up 0.05% of Twin Tree Management's portfolio in Q1 2026, its #450 holding.
  • Twin Tree Management first reported a position in ATI in Q2 2023 and has held it in 5 quarters since.
  • 673 funds tracked by Wall St. Rank held ATI as of Q1 2026.

Based on Twin Tree Management's 13F filing for Q1 2026, filed 14 May 2026.