How many institutional investors hold ATS?

2 tracked institutional investors disclosed a position in ATS (ATS CORPORATION) in their most recent 13F filing.

Who is the largest institutional holder of ATS?

Ken Griffin, Citadel Advisors, holds the largest disclosed position in ATS, valued at $4M.

Where does this ATS ownership data come from?

SEC Form 13F-HR filings, accessed via EDGAR. 13F filings are disclosed quarterly with a 45-day reporting delay and cover U.S.-listed long equity positions only. This is not investment advice.

ATS — ATS CORPORATION

Name: ATS CORPORATION (ATS) — Institutional Ownership
Creator: InvestorLens
License: https://www.sec.gov/about/website-policies

Public company

For educational research only.InvestorLens analyzes public regulatory filings (SEC EDGAR, STOCK Act PTRs) that may be delayed by 45 days or more. Information shown is historical and is not financial, legal, or tax advice, nor a recommendation or solicitation to buy or sell any security. Always do your own research.

InvestorLens aggregates public filing data to show which tracked investors reported holdings in this stock. Dollar values represent reported position values, not market capitalization, and may be delayed up to 45 days. Not a recommendation.

Sourced from SEC EDGAR public filings

About ATS CORPORATION (ATS)

ATS CORPORATION (ATS) appears in the most recent 13F filings of 2 tracked institutional investors. The largest disclosed position is held by Ken Griffin (Citadel Advisors), valued at $4M. Across recent filings, tracked investors recorded 3 new positions, 0 increased, 0 reduced, and 0 exited. All data sourced from SEC 13F filings.

Smart Money Consensus™

Based on recent institutional activity in ATS

100

/100

Strong Institutional Accumulation

Added / Increased3

Reduced0

Exited0

BearishBullish

Crowded Trade Score™

How many top investors track ATS

/100

Undiscovered

2investors

Only 2 tracked investors report this position.

UndiscoveredCrowded

151015+

ATS Ownership Composition

How ATS CORPORATION is held across tracked investor types, based on reported 13F positions.

Dominant Type

Other

100% of tracked value

Institutions

tracked investors

Total Reported

$4.4M

combined 13F value

Other100.0%

Other(2)

100.0%

Tracked investors reporting ATS

Investor	Firm	Shares	Market value	% of portfolio	As of
Ken Griffin	Citadel Advisors	81.2K	$2.3M	0.00%	Mar 31, 2026
Izzy Englander	Millennium Management	75.9K	$2.1M	0.00%	Dec 31, 2025

Ken GriffinMar 31, 2026
Citadel Advisors
Shares
81.2K
Value
$2.3M
% Portfolio
0.00%
Izzy EnglanderDec 31, 2025
Millennium Management
Shares
75.9K
Value
$2.1M
% Portfolio
0.00%

Recent activity

Investor	Action	Δ %	Current value	Filing date
Izzy Englander	New	—	$2.1M	Feb 17, 2026
Ken Griffin	New	—	$2.3M	May 15, 2026
Ken Griffin	New	—	$2.2M	Nov 14, 2025

Izzy Englander
New
$2.1MFeb 17, 2026
Ken Griffin
New
$2.3MMay 15, 2026
Ken Griffin
New
$2.2MNov 14, 2025

Frequently asked questions

How many institutional investors hold ATS?: 2 tracked institutional investors disclosed a position in ATS (ATS CORPORATION) in their most recent 13F filing.
Who is the largest institutional holder of ATS?: Ken Griffin, Citadel Advisors, holds the largest disclosed position in ATS, valued at $4M.
Did institutional ownership of ATS increase or decrease?: Across recent 13F filings, tracked investors recorded 3 new positions, 0 increased, 0 reduced, and 0 fully exited ATS.
Where does this ATS ownership data come from?: SEC Form 13F-HR filings, accessed via EDGAR. 13F filings are disclosed quarterly with a 45-day reporting delay and cover U.S.-listed long equity positions only. This is not investment advice.