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 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 $613M AUM 21.43% 1-Year Est. Return

Royal Bank of Canada Toronto, Ontario, Canada $570B AUM 27.57% 1-Year Est. Return

EIG

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

BGC

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

TCAM

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

Bank of Montreal Toronto, Ontario, Canada $269B AUM 31.4% 1-Year Est. Return

FFH

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

VCM

Vanguard Capital Management Malvern, Pennsylvania $4.04T AUM

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

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

SEI Investments's ATS Position: Q1 2026 in Review

SEI Investments increased its ATS Corp (ATS) stake by 70% in Q1 2026, buying an estimated $2.08M and bringing the position to 167,820 shares worth $4.73M. The position accounts for ﹤0.01% of the portfolio, ranked #1568.

SEI Investments first reported a position in ATS in Q4 2025 and has held it in 2 quarters since. 130 funds tracked by Wall St. Rank hold ATS as of Q1 2026.

SEI Investments held 167,820 shares of ATS Corp worth $4.73M as of Q1 2026.
SEI Investments bought 69,078 ATS Corp shares in Q1 2026, an estimated $2.08M.
ATS Corp made up ﹤0.01% of SEI Investments's portfolio in Q1 2026, its #1568 holding.
SEI Investments first reported a position in ATS Corp in Q4 2025 and has held it in 2 quarters since.
130 funds tracked by Wall St. Rank held ATS Corp as of Q1 2026.

Based on SEI Investments's 13F filing for Q1 2026, filed 13 May 2026.