SEI Investments’s ATS Corp ATS Stock Holding History

SEI Investments’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	$2.8M	Sell	97,376 -70,444	-42%	-$2.17M	﹤0.01%	1780
2026 Q1	$4.73M	Buy	167,820 +69,078	+70%	+$2.08M	﹤0.01%	1568
2025 Q4	$2.72M	Buy	+98,742	New	+$2.64M	﹤0.01%	1690

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

SEI Investments's ATS Position: Q2 2026 in Review

SEI Investments reduced its ATS Corp (ATS) stake by 42% in Q2 2026, selling an estimated $2.17M and leaving 97,376 shares worth $2.8M. The position accounts for ﹤0.01% of the portfolio, ranked #1780.

SEI Investments first reported a position in ATS in Q4 2025 and has held it in 3 quarters since. The position peaked at $4.73M in Q1 2026. 142 funds tracked by Wall St. Rank hold ATS as of Q2 2026.

SEI Investments held 97,376 shares of ATS Corp worth $2.8M as of Q2 2026.
SEI Investments sold 70,444 ATS Corp shares in Q2 2026, an estimated $2.17M.
ATS Corp made up ﹤0.01% of SEI Investments's portfolio in Q2 2026, its #1780 holding.
SEI Investments first reported a position in ATS Corp in Q4 2025 and has held it in 3 quarters since.
SEI Investments's ATS Corp position peaked at $4.73M in Q1 2026.
142 funds tracked by Wall St. Rank held ATS Corp as of Q2 2026.

Based on SEI Investments's 13F filing for Q2 2026, filed 14 Aug 2026.