Citadel Advisors’s ATS Corp ATS Stock Holding History

Citadel Advisors’s Portfolio ATS Stock Details ATS Fund Activity

Bought

Maintained

Sold

Quarter	Market Value	Status	Shares	Change in Stake	Trade Value	Portfolio Weight	Portfolio Position
2026 Q2	$2.37M	Buy	82,308 +1,069	+1%	+$32.9K	﹤0.01%	6190
2026 Q1	$2.29M	Sell	81,239 -67,601	-45%	-$2.03M	﹤0.01%	5801
2025 Q4	$4.1M	Buy	148,840 +79,020	+113%	+$2.11M	﹤0.01%	4601
2025 Q3	$1.83M	Buy	69,820 +43,728	+168%	+$1.26M	﹤0.01%	6253
2025 Q2	$832K	Buy	+26,092	New	+$715K	﹤0.01%	7494
2025 Q1	–	Sell	-4,919	Closed	-$137K	–	14438
2024 Q4	$150K	Sell	4,919 -118,661	-96%	-$3.6M	﹤0.01%	10884
2024 Q3	$3.59M	Buy	123,580 +92,433	+297%	+$2.67M	﹤0.01%	4483
2024 Q2	$1.01M	Sell	31,147 -27,556	-47%	-$889K	﹤0.01%	6561
2024 Q1	$1.98M	Buy	58,703 +9,391	+19%	+$373K	﹤0.01%	5540
2023 Q4	$2.12M	Buy	+49,312	New	+$1.91M	﹤0.01%	5255
2023 Q3	–	Sell	-605,132	Closed	-$27.9M	–	14255
2023 Q2	$27.9M	Buy	+605,132	New	+$27.2M	0.01%	1551

Other funds holding ATS

MCM

Mason Capital Management New York $607M AUM 1.77% 1-Year Est. Return

Royal Bank of Canada Toronto, Ontario, Canada $672B AUM 33.48% 1-Year Est. Return

EIG

EdgePoint Investment Group Toronto, Ontario, Canada $13.2B AUM 32.43% 1-Year Est. Return

BGC

Beutel, Goodman & Co Toronto, Ontario, Canada $13.6B AUM 17.82% 1-Year Est. Return

TCAM

Turtle Creek Asset Management Toronto, Ontario, Canada $2.56B AUM 1.05% 1-Year Est. Return

Bank of Montreal Toronto, Ontario, Canada $304B AUM 35.64% 1-Year Est. Return

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

FFH

Fairfax Financial Holdings Toronto, Ontario, Canada $2.64B AUM 24.46% 1-Year Est. Return

Vanguard Capital Management Malvern, Pennsylvania $4.68T AUM

Jupiter Topco New York $245B AUM

Citadel Advisors's ATS Position: Q2 2026 in Review

Citadel Advisors increased its ATS Corp (ATS) stake by 1.3% in Q2 2026, buying an estimated $32.9K and bringing the position to 82,308 shares worth $2.37M. The position accounts for ﹤0.01% of the portfolio, ranked #6190.

Citadel Advisors first reported a position in ATS in Q2 2023 and has held it in 11 quarters since. The position peaked at $27.9M in Q2 2023. 141 funds tracked by Wall St. Rank hold ATS as of Q2 2026.

Citadel Advisors held 82,308 shares of ATS Corp worth $2.37M as of Q2 2026.
Citadel Advisors bought 1,069 ATS Corp shares in Q2 2026, an estimated $32.9K.
ATS Corp made up ﹤0.01% of Citadel Advisors's portfolio in Q2 2026, its #6190 holding.
Citadel Advisors first reported a position in ATS Corp in Q2 2023 and has held it in 11 quarters since.
Citadel Advisors's ATS Corp position peaked at $27.9M in Q2 2023.
141 funds tracked by Wall St. Rank held ATS Corp as of Q2 2026.

Based on Citadel Advisors's 13F filing for Q2 2026, filed 14 Aug 2026.