ATS Corp /ATS

ATSNYSE

$18.26+0.23 (+1.28%)as of Oct 2, 2026

Legend

Insider buy

Insider sell

Congress buy

Congress sell

Hedge Funds
bought vs soldGreener markers show more buyers; redder markers show more sellers.

Company share activityNet buybacksNo changeNet dilution

Marker size reflects transaction size.

Insider buy
Insider sell
Congress buy
Congress sell
Hedge Funds bought vs sold

Share activityNet buybacksNo changeNet dilution

Marker size reflects transaction size. Greener fund markers mean more buyers.

Insider Buy
Insider Sell
Congress Buy
Congress Sell
Hedge funds bought vs sold
BuybackNo changeNet dilution

ATS Corp /ATS price and activity chart data

Showing the 1Y range: Oct 2, 2025 to Oct 2, 2026. Price (-30.6%). 0 insider or congressional trades plotted in this window as 0 markers; nearby trades of the same kind are grouped.

Transactions plotted on the price chart
Date	Category	Person	Role	Action	Amount	Change in holding

Largest institutional holders

13F · Q2 2026

Fund	% of company held	Value	% of portfolio	Quarterly activity
Mason Capital Management LLC	16.72%	$472M	77.78%	Not reported
Royal Bank of Canada	8.03%	$227M	0.03%	Not reported
EdgePoint Investment Group Inc.	7.14%	$202M	1.52%	Reduce 2.28%
Beutel, Goodman & Co Ltd.	4.89%	$138M	1.02%	Reduce 12.06%
Turtle Creek Asset Management Inc.	3.14%	$88.8M	3.47%	Reduce 37.01%
Bank of Montreal	3.12%	$88.2M	0.03%	Not reported
FMR LLC	2.96%	$83.7M	0.00%	Not reported
Fairfax Financial Holdings Ltd/ Can	2.53%	$70.5M	2.67%	Not reported
Vanguard Capital Management LLC	2.44%	$69.1M	0.00%	Not reported
Jupiter Topco LLC	2.37%	$66.9M	0.03%	Not reported
TD Waterhouse Canada Inc.	1.72%	$47.4M	0.12%	Not reported
Hill City Capital, LP	1.68%	$47.5M	1.11%	Not reported
ACK Asset Management LLC	1.53%	$43.2M	5.04%	Reduce 18.75%
FIL Ltd	1.35%	$38.2M	0.03%	Reduce 25.38%
Alberta Investment Management Corp	1.20%	$33.9M	0.19%	Not reported
Scheer, Rowlett & Associates Investment Management Ltd.	1.20%	$33.8M	2.43%	Reduce 0.56%
Bank of America Corp	1.14%	$32.3M	0.00%	Not reported
Norges Bank	1.11%	$31.2M	0.00%	Not reported
Clearbridge Investments, LLC	1.08%	$30.5M	0.03%	Not reported
Legal & General Group Plc	1.08%	$30.4M	0.01%	Not reported
Marathon Asset Management Ltd	0.97%	$27.5M	1.12%	Reduce 12.75%
Van Lanschot Kempen Investment Management N.V.	0.81%	$32.5M	0.25%	Reduce 7.86%
MIRAE ASSET GLOBAL ETFS HOLDINGS Ltd.	0.80%	$22.7M	0.03%	Not reported
Vanguard Fiduciary Trust Co	0.74%	$20.9M	0.00%	Not reported
Langdon Equity Partners	0.61%	$17.3M	9.66%	New Not reported
Massachusetts Financial Services Co	0.55%	$22.1M	0.01%	Add 1.27%
Mackenzie Financial Corp	0.53%	$21.5M	0.02%	Not reported
Toronto Dominion Bank	0.41%	$11.7M	0.01%	Not reported
Public Sector Pension Investment Board	0.39%	$10.9M	0.03%	Add 5.93%
1832 Asset Management L.P.	0.36%	$10.2M	0.01%	Reduce 11.44%
Waratah Capital Advisors Ltd.	0.34%	$9.64M	0.33%	Add 49.53%
Cibc World Market Inc.	0.33%	$9.42M	0.02%	Reduce 5.63%
ArrowMark Colorado Holdings LLC	0.29%	$8.06M	0.34%	Add 60.92%
Vanguard Global Advisers, LLC	0.28%	$7.9M	0.00%	Not reported
Roubaix Capital, LLC	0.25%	$7.11M	2.55%	New Not reported
Charles Schwab Investment Management Inc	0.25%	$7.02M	0.00%	Not reported
Morgan Stanley	0.24%	$6.74M	0.00%	Not reported
Goldman Sachs Group Inc	0.23%	$6.44M	0.00%	Not reported
UBS Group AG	0.23%	$6.41M	0.00%	Not reported
Scotia Capital Inc.	0.22%	$6.02M	0.02%	Add 10.49%
Dixon Mitchell Investment Counsel Inc.	0.22%	$6.08M	0.20%	Not reported
Jane Street Group, LLC	0.20%	$5.75M	0.00%	Not reported
Granite Investment Partners, LLC	0.20%	$5.64M	0.29%	Not reported
Van Berkom & Associates Inc.	0.19%	$5.41M	0.17%	Reduce 63.46%
Focus Partners Wealth	0.19%	$5.24M	0.01%	Not reported
First Trust Advisors LP	0.19%	$5.23M	0.00%	Add 17.61%
Swiss National Bank	0.17%	$4.83M	0.00%	Not reported
Dimensional Fund Advisors LP	0.17%	$4.81M	0.00%	Not reported
Candelo Capital Management LP	0.17%	$4.76M	2.93%	Add 8.84%
Delaney Capital Management Ltd.	0.16%	$4.61M	0.73%	Add 4.10%

50 of 133 holders

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