ATS Corporation

ATS • NYSE

ATS Corporation is a industrial - machinery company in the industrials sector on NYSE, led by Gordon Raman, with a market cap of $2.7B. As of Q3 2025, 86% of shares are held by 114 institutional investors, with MASON CAPITAL MANAGEMENT LLC as the largest holder at 16.11%.

Chief Executive OfficerGordon Raman

Market Cap$2.7B

Industrial - Machinery

Industrials

Employees7.0K

Websiteatsautomation.com

Overview

Overview of institutional ownership in ATS as of Q3 2025 with a market cap of $2.5B

All Institutions

Institutions: 114
Value Held: $2.2B
Shares Held: 82.6M
Avg Position: $19.1M
Median Position: $2.2M

Hedge Funds

Hedge Funds: 7
Value Held: $508.3M
Shares Held: 19.4M
Avg Position: $72.6M
Median Position: $5.9M

Ownership Breakdown

Institutional (non-HF)

65.78%

$1.7B

Hedge Funds

20.09%

$508.3M

Retail & Other

14.14%

$357.8M

Based on market cap of $2.5B as of Q3 2025. Institutional (non-HF) excludes hedge funds to avoid double counting.

Biggest Investors

Institutions with the largest positions in ATS as of Q3 2025

Institution	Key People	Position Value	Ownership	Owned Since	Total AUM (Long)
MASON CAPITAL MANAGEMENT LLC Hedge Fund•Event Driven	Samuel Thornton Read Managing Partner	$407.8M 83.03% of portfolio	16.11% 15.6M shares	Q2 2023 Held for 2y 5m	$491.1M
R ROYAL BANK OF CANADA Institution	-	$188.7M 0.03% of portfolio	7.46% 7.2M shares	Q2 2023 Held for 2y 5m	$542.04B
T Turtle Creek Asset Management Inc. Institution	-	$182.7M 5.51% of portfolio	7.22% 7.0M shares	Q2 2023 Held for 2y 5m	$3.3B
EdgePoint Investment Group Inc. Long Only Manager	Clifford Tye Bousada CEO	$166.9M 1.25% of portfolio	6.61% 6.4M shares	Q2 2023 Held for 2y 5m	$13.4B
Beutel, Goodman & Co Ltd. Long Only Manager	Jackie Corneil Managing Partner	$165.9M 1.00% of portfolio	6.55% 6.3M shares	Q2 2023 Held for 2y 5m	$16.6B
VANGUARD GROUP INC Institution	Salim Ramji CEO	$87.4M 0.00% of portfolio	3.46% 3.3M shares	Q2 2023 Held for 2y 5m	$6.69T
FAIRFAX FINANCIAL HOLDINGS LTD/ CAN RIA/Wealth	Christopher George Cousins President	$64.1M 3.11% of portfolio	2.57% 2.5M shares	Q3 2024 Held for 1y 2m	$2.1B
Connor, Clark & Lunn Investment Management Ltd. Long Only Manager	John Wyatt Ricketts President	$53.7M 0.17% of portfolio	2.13% 2.1M shares	Q2 2023 Held for 2y 5m	$31.7B
Burgundy Asset Management Ltd. Long Only Manager	Robert Gareth Sankey CEO	$50.0M 0.47% of portfolio	1.87% 1.8M shares	Q2 2023 Held for 2y 5m	$10.6B
ACK Asset Management LLC Hedge Fund•Long/Short	John Henry Reilly Managing Partner	$48.4M 5.76% of portfolio	1.91% 1.8M shares	Q4 2022 Held for 2y 11m	$839.5M

Net Capital Flow

Institutional buying and selling activity for ATS in Q3 2025

Traded: −$71.9M
Buyers: 58
Sellers: 71
Total Bought: +$110.9M
Total Sold: −$182.7M
Avg Position: $15.3M

Biggest Buyers

Institution	Net Bought	Current Position
K KEMPEN CAPITAL MANAGEMENT N.V. Institution	+$21.5M +590.1K shares	$29.7M 815.7K shares
H Hill City Capital, LP Hedge Fund•Value	+$11.1M +425.0K shares	$43.2M 1.6M shares
S Scheer, Rowlett & Associates Investment Management Ltd. Institution	+$11.1M +424.9K shares	$31.8M 1.2M shares
H Her Majesty the Queen in Right of the Province of Alberta as represented by Alberta Investment Management Corp Institution	+$11.1M +422.2K shares	$11.1M 422.2K shares
BANK OF AMERICA CORP /DE/ Institution	+$10.2M +389.9K shares	$32.8M 1.3M shares
R Roubaix Capital, LLC Hedge Fund•Long/Short	+$5.9M +223.5K shares	$5.9M 223.5K shares
C Colony Group, LLC Institution	+$4.8M +182.0K shares	$4.8M 182.0K shares
D D. E. Shaw & Co., Inc. Institution	+$4.2M +159.3K shares	$5.7M 217.9K shares
R ROYAL BANK OF CANADA Institution	+$3.3M +127.2K shares	$188.7M 7.2M shares
LOUISBOURG INVESTMENTS INC. Long Only Manager	+$3.0M +113.8K shares	$5.6M 215.3K shares

Biggest Sellers

Institution	Net Sold	Current Position
C Capital World Investors Institution	−$38.1M −1.2M shares	Sold Off 0 shares
M MOORE CAPITAL MANAGEMENT, LP Hedge Fund•Global Macro	−$19.5M −611.1K shares	Sold Off 0 shares
Clearbridge Investments, LLC Long Only Manager	−$18.8M −716.7K shares	$29.6M 1.1M shares
T Turtle Creek Asset Management Inc. Institution	−$16.2M −617.5K shares	$182.7M 7.0M shares
Beutel, Goodman & Co Ltd. Long Only Manager	−$13.2M −503.8K shares	$165.9M 6.3M shares
P PICTON MAHONEY ASSET MANAGEMENT Institution	−$8.9M −279.8K shares	Sold Off 0 shares
Connor, Clark & Lunn Investment Management Ltd. Long Only Manager	−$8.3M −315.6K shares	$53.7M 2.1M shares
MACKENZIE FINANCIAL CORP Long Only Manager	−$7.1M −272.3K shares	$29.8M 1.1M shares
D Dixon Mitchell Investment Counsel Inc. Institution	−$4.8M −183.6K shares	$5.7M 218.5K shares
Lombard Odier Asset Management Ltd Private Equity	−$3.9M −122.1K shares	Sold Off 0 shares

Entry and Exit Activity

Institutions that initiated new positions or completely exited ATS in Q3 2025

New Positions: 8
New Value: $9.3M
Exited Positions: 28
Exited Value: $87.7M

New Positions

Institution	Position Value
C Colony Group, LLC Institution	$4.8M 182.0K shares
B Bastion Asset Management Inc. Institution	$1.9M 72.7K shares
Blackstone Group L.P. Institution	$1.3M 49.5K shares
Main Management ETF Advisors, LLC Institution	$771.6K 29.5K shares
P PenderFund Capital Management Ltd. Institution	$523.2K 20.0K shares
Q Quarry LP Institution	$32.4K 1.2K shares
R Root Financial Partners, LLC RIA/Wealth	$1.0K 40.0 shares
Larson Financial Group LLC RIA/Wealth	$341.0 13.0 shares

Exited Positions

Institution	Previous Position
C Capital World Investors Institution	$38.1M 1.2M shares
M MOORE CAPITAL MANAGEMENT, LP Hedge Fund•Global Macro	$19.5M 611.1K shares
P PICTON MAHONEY ASSET MANAGEMENT Institution	$8.9M 279.8K shares
Lombard Odier Asset Management Ltd Private Equity	$3.9M 122.1K shares
W Waratah Capital Advisors Ltd. Hedge Fund•Multi-Strategy	$3.8M 118.5K shares
NGAM ADVISORS, L.P. Long Only Manager	$3.2M 98.9K shares
UBS GLOBAL ASSET MANAGEMENT AMERICAS INC Long Only Manager	$2.6M 81.0K shares
F FIL Ltd Institution	$1.1M 35.4K shares
J JANE STREET GROUP, LLC Institution	$1.0M 32.2K shares
E Ewing Morris & Co. Investment Partners Ltd. Institution	$1.0M 31.6K shares

Options Activity

Institutions with the largest Call and Put options positions in ATS as of Q3 2025

Call Positions: 3
Call Value: $1.3M
Put Positions: 5
Put Value: $7.3M

Call Positions

Institution	Position Value
S SIG North Trading, ULC Institution	$943.2K 360.0 contracts
CITADEL ADVISORS LLC Hedge Fund•Multi-Strategy	$379.9K 145.0 contracts
TORONTO DOMINION BANK Institution	$26.2K 10.0 contracts

Put Positions

Institution	Position Value
R ROYAL BANK OF CANADA Institution	$4.7M 1.8K contracts
BANK OF MONTREAL /CAN/ Institution	$2.4M 900.0 contracts
TORONTO DOMINION BANK Institution	$91.5K 35.0 contracts
WOLVERINE ASSET MANAGEMENT LLC Hedge Fund•Multi-Strategy	$86.3K 33.0 contracts
S SIG North Trading, ULC Institution	- - contracts

Most Committed Institutions

Institutions with ATS as the highest % of their portfolio as of Q3 2025

Institution	Key People	Portfolio Weight	Ownership	Owned Since	Total AUM (Long)
MASON CAPITAL MANAGEMENT LLC Hedge Fund•Event Driven	Samuel Thornton Read Managing Partner	83.03% $407.8M	16.11% 15.6M shares	Q2 2023 Held for 2y 5m	$491.1M
ACK Asset Management LLC Hedge Fund•Long/Short	John Henry Reilly Managing Partner	5.76% $48.4M	1.91% 1.8M shares	Q4 2022 Held for 2y 11m	$839.5M
T Turtle Creek Asset Management Inc. Institution	-	5.51% $182.7M	7.22% 7.0M shares	Q2 2023 Held for 2y 5m	$3.3B
G Galibier Capital Management Ltd. Institution	-	3.90% $11.7M	0.46% 447.4K shares	Q2 2024 Held for 1y 5m	$300.1M
FAIRFAX FINANCIAL HOLDINGS LTD/ CAN RIA/Wealth	Christopher George Cousins President	3.11% $64.1M	2.57% 2.5M shares	Q3 2024 Held for 1y 2m	$2.1B
R Roubaix Capital, LLC Hedge Fund•Long/Short	Christopher Edmund Hillary CEO	2.66% $5.9M	0.23% 223.5K shares	Q3 2025 Held for 2 months	$220.3M
S Scheer, Rowlett & Associates Investment Management Ltd. Institution	-	1.90% $31.8M	1.26% 1.2M shares	Q4 2024 Held for 11 months	$1.7B
H Hill City Capital, LP Hedge Fund•Value	Herbert Anselem Frazier CIO	1.77% $43.2M	1.71% 1.6M shares	Q1 2025 Held for 8 months	$2.4B
Foresight Group Ltd Liability Partnership Real Assets	FORESIGHT WAE HYDROGEN TECHNOLOGY GENERAL PARTNER LLP Related Person	1.52% $10.2M	0.40% 388.9K shares	Q1 2025 Held for 8 months	$669.9M
EdgePoint Investment Group Inc. Long Only Manager	Clifford Tye Bousada CEO	1.25% $166.9M	6.61% 6.4M shares	Q2 2023 Held for 2y 5m	$13.4B

Hedge Fund Spotlight

Discover hedge funds investing in ATS

Hill City Capital, LP

Hedge Fund • Value

Portfolio ManagerHerbert Anselem Frazier

Portfolio Value: $2.4B
Positions: 23
Last Reported: Q3 2025

Sector Allocation

Position in ATS Corporation

Market Value: $43.2M
Shares Held: 1.6M
Portfolio Weight: 1.77%
Owned Since: 2025-Q1

Top Holding	Sector	Market Value	Weight
1 First Solar FSLR	Solar Energy	$460.9M	18.84%
2 MasTec MTZ	Engineering & Construction Industrials	$458.6M	18.75%
3 Dycom Industries DY	Engineering & Construction Industrials	$294.6M	12.05%