Citadel Advisors

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 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	–	14451
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	–	14264
2023 Q2	$27.9M	Buy	+605,132	New	+$27.2M	0.03%	1551

Other funds holding ATS

Mason Capital Management New York $613M AUM 21.43% 1-Year Est. Return

Royal Bank of Canada

Royal Bank of Canada Toronto, Ontario, Canada $528B AUM 27.57% 1-Year Est. Return

EdgePoint Investment Group Toronto, Ontario, Canada $12.5B AUM 31.7% 1-Year Est. Return

Beutel, Goodman & Co Toronto, Ontario, Canada $14.8B AUM 15.12% 1-Year Est. Return

Turtle Creek Asset Management Toronto, Ontario, Canada $2.67B AUM 0.64% 1-Year Est. Return

Bank of Montreal

Bank of Montreal Toronto, Ontario, Canada $245B AUM 31.4% 1-Year Est. Return

Fairfax Financial Holdings Toronto, Ontario, Canada $1.94B AUM 27.76% 1-Year Est. Return

Vanguard Capital Management Malvern, Pennsylvania $4.04T AUM

Janus Henderson Group

Janus Henderson Group London, United Kingdom $209B AUM 37.72% 1-Year Est. Return

Fidelity Investments

Fidelity Investments Boston, Massachusetts $1.9T AUM 41.92% 1-Year Est. Return