ATS Ownership

Who are the major shareholders and have insiders been buying or selling?

Recent Insider Transactions

NYSE:ATS Recent Insider Transactions by Companies or Individuals
Date	Value	Name	Entity	Shares	Max Price
03 Apr 24	SellUS$120,534,295	Mason Capital Management LLC	Company	3,500,000	US$34.44
13 Feb 24	BuyUS$10,023	Heinrich Sielemann	Individual	250	US$40.09
08 Dec 23	BuyUS$15,826	Heinrich Sielemann	Individual	400	US$39.57

Insider Trading Volume

Insider Buying: Insufficient data to determine if insiders have bought more shares than they have sold in the past 3 months.

Ownership Breakdown

What is the ownership structure of ATS?
Owner Type	Number of Shares	Ownership Percentage
Private Companies	188	0.000192%
Individual Insiders	615,746	0.628%
General Public	14,024,082	14.3%
Hedge Funds	14,349,765	14.6%
Institutions	69,044,697	70.4%

Dilution of Shares: Shareholders have not been meaningfully diluted in the past year.

Top Shareholders

Top 25 shareholders own 66.25% of the company

Ownership	Name	Shares	Current Value	Change %	Portfolio %
14.6%	Mason Capital Management LLC	14,349,765	US$441.2m	0%	85.88%
14.2%	Capital Research and Management Company	13,941,665	US$428.7m	14.3%	0.02%
4.66%	FMR LLC	4,567,471	US$140.4m	-7.59%	0.01%
3.95%	Turtle Creek Asset Management Inc.	3,875,730	US$119.2m	34%	2.94%
3.63%	EdgePoint Investment Group Inc.	3,560,512	US$109.5m	34.3%	0.58%
2.97%	The Vanguard Group, Inc.	2,916,009	US$89.7m	1.11%	no data
2.42%	Connor, Clark & Lunn Investment Management Ltd.	2,374,922	US$73.0m	-12.7%	0.3%
1.79%	RBC Global Asset Management Inc.	1,753,101	US$53.9m	-14.9%	0.04%
1.62%	ClearBridge Investments, LLC	1,584,250	US$48.7m	-2.11%	0.04%
1.57%	ACK Asset Management LLC	1,540,000	US$47.3m	18%	5.79%
1.41%	Manulife Asset Management	1,377,518	US$42.4m	166%	0.03%
1.2%	Janus Henderson Group plc	1,176,403	US$36.2m	-24%	0.01%
1.2%	Mackenzie Financial Corporation	1,176,012	US$36.2m	-2.17%	0.04%
1.19%	Toronto-Dominion Bank, Banking Investments	1,169,855	US$36.0m	5.85%	0.05%
1.17%	AllianceBernstein L.P.	1,149,275	US$35.3m	-6.64%	0.01%
1.17%	Beutel Goodman & Company Ltd.	1,149,239	US$35.3m	-1.42%	0.16%
0.98%	Swedbank Robur Fonder AB	964,000	US$29.6m	0%	0.02%
0.96%	Norges Bank Investment Management	943,916	US$29.0m	0%	no data
0.92%	Desjardins Global Asset Management Inc.	900,790	US$27.7m	28.9%	0.31%
0.88%	Fédération des Caisses Desjardins du Québec, Asset Management Arm	865,315	US$26.6m	0%	0.24%
0.86%	Caisse de dépôt et placement du Québec	842,605	US$25.9m	0%	0.03%
0.76%	Mirae Asset Global Investments Co., Ltd.	745,616	US$22.9m	-24.2%	0.02%
0.71%	TD Asset Management, Inc.	692,182	US$21.3m	8.57%	0.02%
0.7%	Canoe Financial LP	686,879	US$21.1m	-1.81%	0.35%
0.66%	Alberta Investment Management Corporation	646,400	US$19.9m	0%	0.2%