Mariner’s ATS Corp ATS Stock Holding History

Mariner’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	$342K	Sell	11,879 -4,358	-27%	-$134K	﹤0.01%	2740
2026 Q1	$458K	Buy	16,237 +4,070	+33%	+$122K	﹤0.01%	2556
2025 Q4	$335K	Buy	12,167 +3,143	+35%	+$83.9K	﹤0.01%	2749
2025 Q3	$236K	Sell	9,024 -6,616	-42%	-$191K	﹤0.01%	3020
2025 Q2	$499K	Sell	15,640 -1,760	-10%	-$48.2K	﹤0.01%	2341
2025 Q1	$434K	Buy	17,400 +8,072	+87%	+$225K	﹤0.01%	2320
2024 Q4	$284K	Buy	9,328 +689	+8%	+$20.9K	﹤0.01%	2676
2024 Q3	$251K	Buy	+8,639	New	+$250K	﹤0.01%	2730

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

Mariner's ATS Position: Q2 2026 in Review

Mariner reduced its ATS Corp (ATS) stake by 27% in Q2 2026, selling an estimated $134K and leaving 11,879 shares worth $342K. The position accounts for ﹤0.01% of the portfolio, ranked #2740.

Mariner first reported a position in ATS in Q3 2024 and has held it in 8 quarters since. The position peaked at $499K in Q2 2025. 141 funds tracked by Wall St. Rank hold ATS as of Q2 2026.

Mariner held 11,879 shares of ATS Corp worth $342K as of Q2 2026.
Mariner sold 4,358 ATS Corp shares in Q2 2026, an estimated $134K.
ATS Corp made up ﹤0.01% of Mariner's portfolio in Q2 2026, its #2740 holding.
Mariner first reported a position in ATS Corp in Q3 2024 and has held it in 8 quarters since.
Mariner's ATS Corp position peaked at $499K in Q2 2025.
141 funds tracked by Wall St. Rank held ATS Corp as of Q2 2026.

Based on Mariner's 13F filing for Q2 2026, filed 13 Aug 2026.