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Andreas Halvorsen’s ATI ATI Stock Holding History

Andreas Halvorsen’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 		$227M Sell
1,153,880
-2,178,963
-65% -$369M 0.65% 51
2026
Q1 		$485M Buy
+3,332,843
New +$464M 1.36% 31

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

Andreas Halvorsen's ATI Position: Q2 2026 in Review

Andreas Halvorsen reduced its ATI (ATI) stake by 65% in Q2 2026, selling an estimated $369M and leaving 1,153,880 shares worth $227M. The position accounts for 0.65% of the portfolio, ranked #51.

Andreas Halvorsen first reported a position in ATI in Q1 2026 and has held it in 2 quarters since. The position peaked at $485M in Q1 2026. 788 funds tracked by Wall St. Rank hold ATI as of Q2 2026.

  • Andreas Halvorsen held 1,153,880 shares of ATI worth $227M as of Q2 2026.
  • Andreas Halvorsen sold 2,178,963 ATI shares in Q2 2026, an estimated $369M.
  • ATI made up 0.65% of Andreas Halvorsen's portfolio in Q2 2026, its #51 holding.
  • Andreas Halvorsen first reported a position in ATI in Q1 2026 and has held it in 2 quarters since.
  • Andreas Halvorsen's ATI position peaked at $485M in Q1 2026.
  • 788 funds tracked by Wall St. Rank held ATI as of Q2 2026.

Based on Viking Global Investors's 13F filing for Q2 2026, filed 14 Aug 2026.