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 Q2	$493K	Sell	2,500 -169,200	-99%	-$28.7M	﹤0.01%	1985
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 New York $6.73T AUM 46.02% 1-Year Est. Return

Vanguard Portfolio Management Malvern, Pennsylvania $2.22T AUM

Vanguard Capital Management Malvern, Pennsylvania $4.68T AUM

Capital World Investors Los Angeles, California $846B AUM 46.74% 1-Year Est. Return

State Street Boston, Massachusetts $3.38T AUM 44.17% 1-Year Est. Return

Capital Research Global Investors Los Angeles, California $717B AUM 35.42% 1-Year Est. Return

Fidelity Investments Boston, Massachusetts $2.3T AUM 54.33% 1-Year Est. Return

Capital International Investors Los Angeles, California $484B AUM 34.9% 1-Year Est. Return

Invesco Atlanta, Georgia $1.26T AUM 61.52% 1-Year Est. Return

Geode Capital Management Boston, Massachusetts $1.88T AUM 44.46% 1-Year Est. Return

PEAK6's ATI Position: Q2 2026 in Review

PEAK6 sold out of ATI (ATI) in Q2 2026, closing a stake of 9,208 shares — an estimated $1.56M sold.

PEAK6 first reported a position in ATI in Q1 2025 and held it in 3 quarters. The position peaked at $1.82M in Q4 2025. 795 funds tracked by Wall St. Rank hold ATI as of Q2 2026.

PEAK6 reported no remaining ATI position as of Q2 2026 after selling out during the quarter.
PEAK6 sold 9,208 ATI shares in Q2 2026, an estimated $1.56M.
PEAK6 first reported a position in ATI in Q1 2025 and held it in 3 quarters.
PEAK6's ATI position peaked at $1.82M in Q4 2025.
795 funds tracked by Wall St. Rank held ATI as of Q2 2026.

Based on PEAK6's 13F filing for Q2 2026, filed 13 Aug 2026.