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ATS Corp

116 hedge funds and large institutions have $2.2B invested in ATS Corp in 2025 Q3 according to their latest regulatory filings, with 15 funds opening new positions, 42 increasing their positions, 45 reducing their positions, and 31 closing their positions.

New
Increased
Maintained
Reduced
Closed

7% less repeat investments, than reductions

Existing positions increased: 42 | Existing positions reduced: 45

3.5% less ownership

Funds ownership: 88.92%85.42% (-3.5%)

12% less funds holding

Funds holding: 132116 (-16)

21% less capital invested

Capital invested by funds: $2.77B → $2.2B (-$572M)

33% less funds holding in top 10

Funds holding in top 10: 64 (-2)

52% less first-time investments, than exits

New positions opened: 15 | Existing positions closed: 31

81% less call options, than puts

Call options by funds: $1.36M | Put options by funds: $7.28M

Holders
116
Holders Change
-16
Holders Change %
-12.12%
% of All Funds
1.52%
Holding in Top 10
4
Holding in Top 10 Change
-2
Holding in Top 10 Change %
-33.33%
% of All Funds
0.05%
New
15
Increased
42
Reduced
45
Closed
31
Calls
$1.36M
Puts
$7.28M
Net Calls
-$5.92M
Net Calls Change
+$1.01M
Name Holding Trade Value Shares
Change
Change in
Stake
MCM
1
Mason Capital Management
New York
$408M
Royal Bank of Canada
2
Royal Bank of Canada
Ontario, Canada
$189M +$3.66M +127,157 +2%
TCAM
3
Turtle Creek Asset Management
Ontario, Canada
$183M -$17.8M -617,528 -8%
EIG
4
EdgePoint Investment Group
Ontario, Canada
$167M -$1.52M -52,711 -0.8%
BGC
5
Beutel, Goodman & Co
Ontario, Canada
$166M -$14.5M -503,800 -7%
Vanguard Group
6
Vanguard Group
Pennsylvania
$87.4M +$2M +69,334 +2%
FFH
7
Fairfax Financial Holdings
Ontario, Canada
$64.1M
Connor, Clark & Lunn Investment Management (CC&L)
8
Connor, Clark & Lunn Investment Management (CC&L)
British Columbia, Canada
$53.7M -$9.09M -315,556 -13%
BAM
9
Burgundy Asset Management
Ontario, Canada
$50M -$132K -4,590 -0.3%
AAM
10
ACK Asset Management
Connecticut
$48.4M
HCC
11
Hill City Capital
Massachusetts
$43.2M +$12.2M +425,000 +35%
TWC
12
TD Waterhouse Canada
Ontario, Canada
$37.4M -$636K -22,088 -2%
Fidelity Investments
13
Fidelity Investments
Massachusetts
$36M -$848K -29,425 -2%
AIMCA
14
Alberta Investment Management Corp (AIMCo)
Alberta, Canada
$35.1M +$16.5M +572,665 +75%
Bank of America
15
Bank of America
North Carolina
$32.8M +$11.2M +389,862 +45%
SRAIM
16
Scheer Rowlett & Associates Investment Management
Ontario, Canada
$31.8M +$12.2M +424,879 +54%
Invesco
17
Invesco
Georgia
$31.4M +$245K +8,505 +0.7%
TD Asset Management
18
TD Asset Management
Ontario, Canada
$30.9M -$2.8M -97,117 -8%
MAMU
19
Marathon Asset Management (UK)
United Kingdom
$30.5M -$1.99M -68,954 -6%
Bank of Montreal
20
Bank of Montreal
Ontario, Canada
$29.9M +$1.27M +44,229 +4%
Mackenzie Financial
21
Mackenzie Financial
Ontario, Canada
$29.8M -$7.84M -272,274 -19%
VLKIM
22
Van Lanschot Kempen Investment Management
Netherlands
$29.7M +$17M +590,096 +262%
ClearBridge Investments
23
ClearBridge Investments
New York
$29.6M -$20.6M -716,655 -39%
Mirae Asset Global ETFs Holdings
24
Mirae Asset Global ETFs Holdings
Hong Kong
$29M -$108K -3,744 -0.3%
Janus Henderson Group
25
Janus Henderson Group
United Kingdom
$23.5M -$686K -23,821 -3%

ATS Hedge Fund Activity: Q3 2025 in Review

116 of the 7,621 institutional investors tracked by Wall St. Rank reported a position in ATS Corp (ATS) for Q3 2025, worth a combined $2.2B — down 21% from $2.77B a quarter earlier.

Sellers outnumbered buyers: 31 funds closed out of ATS and 15 opened new positions — a net loss of 16 holders — while 45 trimmed existing stakes and 42 added.

The largest buyer was Van Lanschot Kempen Investment Management, adding an estimated $17M. The largest seller was Capital World Investors, exiting entirely with an estimated $38.1M sold.

  • 116 institutional investors held ATS Corp (ATS) as of Q3 2025, down from 132 in Q2 2025.
  • Funds reported $2.2B of ATS Corp stock for Q3 2025, down 21% quarter-over-quarter.
  • 15 funds opened new ATS Corp positions in Q3 2025 and 31 closed out, a net change of -16 holders.
  • The largest ATS Corp buyer in Q3 2025 was Van Lanschot Kempen Investment Management, an estimated $17M added.
  • The largest ATS Corp seller in Q3 2025 was Capital World Investors, an estimated $38.1M sold.

Based on aggregated 13F filings for Q3 2025.