Citadel Advisors
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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
2025
Q4 		– Sell
-14,500
Closed -$380K – 12629
2025
Q3 		$380K Sell
14,500
-200
-1% -$5.76K ﹤0.01% 9795
2025
Q2 		$469K Buy
14,700
+2,500
+20% +$68.5K ﹤0.01% 8786
2025
Q1 		$304K Sell
12,200
-16,700
-58% -$466K ﹤0.01% 9551
2024
Q4 		$881K Buy
28,900
+23,900
+478% +$726K ﹤0.01% 7309
2024
Q3 		$145K Buy
5,000
+600
+14% +$17.3K ﹤0.01% 10603
2024
Q2 		$142K Buy
4,400
+1,200
+38% +$38.7K ﹤0.01% 10416
2024
Q1 		$108K Buy
+3,200
New +$127K ﹤0.01% 11251

Other funds holding ATS

MCM
Mason Capital Management New York $607M AUM 1.77% 1-Year Est. Return
Royal Bank of Canada
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
Bank of Montreal Toronto, Ontario, Canada $304B AUM 35.64% 1-Year Est. Return
Fidelity Investments
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
Vanguard Capital Management Malvern, Pennsylvania $4.68T AUM
JT
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.