PEAK6
ATI icon

PEAK6’s ATI ATI Stock Holding History

PEAK6’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 		$25M Sell
171,700
-30,900
-15% -$4.3M 0.06% 290
2025
Q4 		$23.3M Buy
202,600
+155,300
+328% +$15.1M 0.04% 339
2025
Q3 		$3.85M Buy
47,300
+9,900
+26% +$802K 0.01% 1157
2025
Q2 		$3.23M Buy
+37,400
New +$2.56M 0.01% 1189

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

PEAK6's ATI Position: Q1 2026 in Review

PEAK6 reduced its ATI (ATI) stake by 42% in Q1 2026, selling an estimated $924K and leaving 9,208 shares worth $1.34M. The position accounts for ﹤0.01% of the portfolio, ranked #1576.

PEAK6 first reported a position in ATI in Q1 2025 and has held it in 3 quarters since. The position peaked at $1.82M in Q4 2025. 673 funds tracked by Wall St. Rank hold ATI as of Q1 2026.

  • PEAK6 held 9,208 shares of ATI worth $1.34M as of Q1 2026.
  • PEAK6 sold 6,635 ATI shares in Q1 2026, an estimated $924K.
  • ATI made up ﹤0.01% of PEAK6's portfolio in Q1 2026, its #1576 holding.
  • PEAK6 first reported a position in ATI in Q1 2025 and has held it in 3 quarters since.
  • PEAK6's ATI position peaked at $1.82M in Q4 2025.
  • 673 funds tracked by Wall St. Rank held ATI as of Q1 2026.

Based on PEAK6's 13F filing for Q1 2026, filed 14 May 2026.