Ats ATS Institutional Ownership

NYSE ATS

$19.36 -0.07 (-0.33%)

As of: Sep 9, 2026 · 3:59 PM EDT

Institutions by Trading Activity

143 Institutions

Increased 83 58.0%

Unchanged 15 10.5%

Reduced 45 31.5%

Ownership Statistics

13F · as of 30 Jun, 2026

Institutional Ownership

83.62%

▼-11.53 pp QoQ

Shares Held by Institutions

81.86Mn

of 97.90Mn outstanding

▼-4.32% QoQ

Shares Outstanding

97.90Mn

16.03Mn held outside 13F filers

Institutional Investors

143

filed 13F for Jun 2026

▲+13 vs prior quarter

Net Shares Added (QoQ)

-3.69Mn

distributed since last quarter

Value of Holdings

$1.61Bn

reported market value

Shares Owned by Institutions

Shares held % of outstanding

Latest —

Average ownership —

Peak ownership —

Shares Purchased/Sold by Institutions

Accumulated Distributed

Latest quarter —

Net over range —

Accumulating quarters —

Ownership Summary

Quarter ending 30 Jun, 2026

ATS Corp /ATS (NYSE:ATS) showed up in the 13F filings of 143 institutional investors as of June 2026.

Collectively, these holders controlled 83.6% of Ats's outstanding shares in June 2026, down from 95.2% in March 2026.
Their total shares held in ATS decreased -4.32% quarter over quarter, and separately, investors owning Ats increased 9.16% from a year ago.
During the quarter, 83 of these 143 funds increased positions in ATS, 45 reduced exposure, and 15 held steady.
Combined, these investors held 81.86Mn shares in ATS for June 2026, down by 3.69Mn shares quarter on quarter, and down 12.83Mn shares year over year.
MASON CAPITAL MANAGEMENT LLC holds the largest position in ATS at 16.4Mn shares as of June 30, 2026, or 16.76% of shares outstanding.
Top purchasers of ATS stock for the quarter ending June 2026 included Jupiter Topco LLC (2.32Mn), NORGES BANK (1.08Mn), FMR LLC (627.98K), Langdon Equity Partners (600.0K), Legal & General Group Plc (444.72K).
Top sellers of ATS stock for the quarter ending June 2026 included Turtle Creek Asset Management Inc. (7.3Mn), Connor, Clark & Lunn Investment Management Ltd. (1.18Mn), Beutel, Goodman & Co Ltd. (657.83K), FIL Ltd (451.33K), TD ASSET MANAGEMENT INC (418.86K).
Per Business Quant data, the top 10 holders of Ats for the quarter ending June 2026 are MASON CAPITAL MANAGEMENT LLC (16.4Mn), Royal Bank Of Canada (7.88Mn), EdgePoint Investment Group Inc. (7.0Mn), Beutel, Goodman & Co Ltd. (4.8Mn), Turtle Creek Asset Management Inc. (3.08Mn), Bank Of Montreal /Can/ (3.06Mn), FMR LLC (2.91Mn), Fairfax Financial Holdings Ltd/ Can (2.49Mn), VANGUARD CAPITAL MANAGEMENT LLC (2.4Mn), Jupiter Topco LLC (2.32Mn).

Form 13F Holdings

143 Institutional Holders

Report period 30 Jun, 2026

Total shares held 81.86Mn

Of outstanding 83.62%

#	Institution	CIK	Shares Held	% of Outstanding	Change (QoQ)	Change (%)	Value (USD)
1	MASON CAPITAL MANAGEMENT LLC	0001218735	16,404,170	16.76%	0	0.00%	$472.11Mn
2	Royal Bank Of Canada	0001000275	7,881,423	8.05%	▲119,585	+1.54%	$226.83Mn
3	EdgePoint Investment Group Inc.	0001481669	7,004,577	7.16%	▼163,535	-2.28%	$201.70Mn
4	Beutel, Goodman & Co Ltd.	0001361974	4,796,922	4.90%	▼657,827	-12.06%	$138.22K
5	Turtle Creek Asset Management Inc.	0001484148	3,084,567	3.15%	▼7,301,252	-70.30%	$88.77Mn
6	Bank Of Montreal /Can/	0000927971	3,062,973	3.13%	▼52,387	-1.68%	$88.20Mn
7	FMR LLC	0000315066	2,905,456	2.97%	▲627,984	+27.57%	$83.75Mn
8	Fairfax Financial Holdings Ltd/ Can	0000915191	2,486,400	2.54%	0	0.00%	$70.49Mn
9	VANGUARD CAPITAL MANAGEMENT LLC	0002100119	2,398,431	2.45%	▲31,701	+1.34%	$69.13Mn
10	Jupiter Topco LLC	0002146052	2,322,073	2.37%	▲2,322,073	0.00%	$66.91Mn
11	TD Waterhouse Canada Inc.	0001999606	1,683,683	1.72%	▲49,234	+3.01%	$47.43Mn
12	Hill City Capital, LP	0001837343	1,649,857	1.69%	0	0.00%	$47.48Mn
13	ACK Asset Management LLC	0001510940	1,500,000	1.53%	▼346,196	-18.75%	$43.17Mn
14	FIL Ltd	0000318989	1,326,851	1.36%	▼451,330	-25.38%	$38.24Mn
15	Alberta Investment Management Corp	0001463559	1,177,491	1.20%	▲237,300	+25.24%	$33.90Mn
16	Scheer, Rowlett & Associates Investment Management Ltd.	0001426327	1,175,268	1.20%	▼6,669	-0.56%	$33.84Mn
17	Bank Of America Corp /De/	0000070858	1,122,152	1.15%	▲176,277	+18.64%	$32.30Mn
18	Connor, Clark & Lunn Investment Management Ltd.	0001596800	1,089,460	1.11%	▼1,175,297	-51.90%	$31.37Mn
19	NORGES BANK	0001374170	1,084,181	1.11%	▲1,084,181	0.00%	$31.22Mn
20	Clearbridge Investments, LLC	0001348883	1,060,487	1.08%	▼30,804	-2.82%	$30.52Mn

Showing 1 to 20 of 143 holders