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ATS (ATS) Institutional Ownership

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$18.29 +0.26 (+1.44%)
Closing price 10/2/2026 03:59 PM Eastern
Extended Trading
$18.26 -0.04 (-0.19%)
As of 10/2/2026 07:30 PM Eastern
Extended trading is trading that happens on electronic markets outside of regular trading hours. This is a fair market value extended hours price provided by Massive. Learn more.
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Institutional Ownership Changes (13F Filings) for ATS (NYSE:ATS)

Current
Institutional Ownership
Percentage
75.84%
Number of
Institutional Buyers
(last 12 months)
72
Total
Institutional Inflows
(last 12 months)
$593.83M
Number of
Institutional Sellers
(last 12 months)
38
Total
Institutional Outflows
(last 12 months)
$91.50M
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ATS Institutional Buying and Selling by Quarter

ATS Major Shareholders & Ownership History

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Reporting DateMajor Shareholder NameShares HeldMarket Value% of PortfolioQuarterly Change in SharesOwnership in CompanyDetails
9/15/2026SkyView Investment Advisors LLC7,500$216K0.2%-31.6%0.008%
9/9/2026Engineers Gate Manager LP31,363$903K0.0%+140.3%0.032%
9/9/2026Squarepoint Ops LLC24,760$713K0.0%N/A0.025%
8/22/2026TD Waterhouse Canada Inc.1,683,683$47.43M0.1%+3.0%1.716%
8/20/2026Susquehanna International Group LLP34,791$1.00M0.0%N/A0.035%
8/19/2026Van ECK Associates Corp46,507$1.34M0.0%+91.6%0.047%
8/18/2026Hill City Capital LP1,649,857$47.48M0.0%N/A1.681%
8/18/2026Public Employees Retirement System of Ohio28,366$817K0.0%N/A0.029%
8/18/2026PenderFund Capital Management Ltd.37,700$1.09M0.1%N/A0.038%
8/17/2026Bank of America Corp DE1,122,152$32.30M0.0%N/A1.144%
8/15/2026Polar Asset Management Partners Inc.105,203$3.03M0.0%N/A0.107%
8/15/2026Jupiter Topco LLC2,322,073$66.91M0.0%N/A2.366%
8/14/2026Legal & General Group Plc1,056,408$30.40M0.0%N/A1.077%
8/14/2026The Manufacturers Life Insurance Company73,654$2.12M0.0%N/A0.075%
8/14/2026Front Street Capital Management Inc.124,973$3.60M0.4%N/A0.127%
8/13/2026Hill City Capital LP1,649,857$47.48M1.2%N/A1.681%
8/13/2026Cibc World Market Inc.327,087$9.42M0.0%N/A0.333%
8/13/2026ACK Asset Management LLC1,500,000$43.17M5.0%-18.8%1.529%
8/13/2026Connor Clark & Lunn Investment Management Ltd.1,089,460$31.37M0.1%N/A1.110%
8/11/2026Caldwell Investment Management Ltd.60,800$1.75M1.1%N/A0.062%
8/7/2026K.J. Harrison & Partners Inc100,000$2.88M0.4%N/A0.102%
8/7/2026Deutsche Bank AG10,811$311K0.0%N/A0.011%
8/6/2026Alberta Investment Management Corp1,177,491$33.90M0.2%N/A1.200%
8/6/2026State of Wyoming1,162$33K0.0%N/A0.001%
5/19/2026Bank of America Corp DE945,875$26.67M0.0%-14.0%0.964%
5/19/2026Janus Henderson Group PLC2,297,214$64.54M0.0%+166.5%2.341%
5/18/2026Royal Bank of Canada7,761,838$218.88M0.0%+1.5%7.912%
5/18/2026EdgePoint Investment Group Inc.7,168,112$202.08M1.6%+4.1%7.306%
5/16/2026The Manufacturers Life Insurance Company74,130$2.09M0.0%-3.0%0.076%
5/16/2026Lazard Asset Management LLC69,912$1.97M0.0%+19.7%0.071%
5/14/2026Sei Investments Co.167,820$4.73M0.0%+70.0%0.171%
5/14/2026State of Wyoming1,215$34K0.0%N/A0.001%
5/13/2026First Trust Advisors LP154,403$4.35M0.0%-16.1%0.157%
5/7/2026Van Berkom & Associates Inc.257,360$7.24M0.2%-4.4%0.262%
5/7/2026Dimensional Fund Advisors LP122,456$3.45M0.0%+11.0%0.125%
5/4/2026Principal Financial Group Inc.620,840$17.44M0.0%-29.3%0.633%
4/30/2026Granite Investment Partners LLC173,031$4.88M0.3%-15.1%0.176%
4/28/2026Montrusco Bolton Investments Inc.170,956$4.80M0.1%-32.9%0.174%
4/22/2026Pictet Asset Management Holding SA16,423$461K0.0%+2.6%0.017%
3/20/2026Purpose Unlimited Inc.28,802$793K0.0%N/A0.029%
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3/17/2026Rockefeller Capital Management L.P.9,790$270K0.0%-65.9%0.010%
2/19/2026Invesco Ltd.1,272,222$35.04M0.0%+6.3%1.297%
2/18/2026Mackenzie Financial Corp758,980$21.05M0.0%-33.3%0.774%
2/18/2026SkyView Investment Advisors LLC10,966$302K0.0%N/A0.011%
2/18/2026XTX Topco Ltd10,640$293K0.0%-21.9%0.011%
2/18/2026Guardian Capital LP47,063$1.30M0.0%N/A0.048%
2/18/2026Toronto Dominion Bank81,910$2.26M0.0%+8.6%0.084%
2/18/2026Numerai GP LLC16,305$449K0.1%N/A0.017%
2/18/2026Millennium Management LLC75,879$2.09M0.0%+73.2%0.077%
2/18/2026Investment Management Corp of Ontario10,116$279K0.0%N/A0.010%
2/18/2026Janus Henderson Group PLC861,839$23.77M0.0%-4.1%0.879%
2/18/2026AYAL Capital Advisors Ltd72,200$1.99M0.7%N/A0.074%
2/17/2026EdgePoint Investment Group Inc.6,888,785$189.77M1.6%+8.0%7.025%
2/17/2026Polar Asset Management Partners Inc.180,000$4.96M0.1%N/A0.184%
2/17/2026Lazard Asset Management LLC58,426$1.61M0.0%N/A0.060%
2/17/2026FIL Ltd53,569$1.48M0.0%N/A0.055%
2/17/2026Russell Investments Group Ltd.8,529$235K0.0%-74.2%0.009%
2/17/2026Royal Bank of Canada7,644,547$210.53M0.0%+8.9%7.796%
2/17/2026Alberta Investment Management Corp1,340,265$36.92M0.1%+217.5%1.367%
2/16/2026Verition Fund Management LLC9,192$253K0.0%N/A0.009%
2/16/2026Mariner LLC12,167$335K0.0%+34.8%0.012%
2/16/2026Barclays PLC5,264$145K0.0%+16.8%0.005%
2/13/2026Stifel Financial Corp12,593$347K0.0%+3.9%0.013%
2/13/2026Smartleaf Asset Management LLC1,052$29K0.0%N/A0.001%
2/13/2026Public Sector Pension Investment Board287,829$7.93M0.0%+364.9%0.294%
2/13/2026First Trust Advisors LP184,128$5.07M0.0%+23.8%0.188%
2/13/2026Charles Schwab Investment Management Inc.236,332$6.52M0.0%+2.5%0.241%
2/13/2026Van Lanschot Kempen Investment Management N.V.815,031$22.45M0.2%-0.1%0.831%
2/12/2026Northwest & Ethical Investments L.P.10,553$291K0.0%+22.5%0.011%
2/12/2026Jane Street Group LLC22,063$608K0.0%N/A0.022%
2/12/2026Federation des caisses Desjardins du Quebec116,404$3.20M0.0%-40.4%0.119%
2/12/2026Dimensional Fund Advisors LP110,342$3.04M0.0%+23.7%0.113%
2/12/2026Granite Investment Partners LLC203,876$5.62M0.3%-1.0%0.208%
2/12/2026Bank of Montreal Can3,022,693$83.27M0.0%+187.1%3.083%
2/12/2026Swiss National Bank164,400$4.54M0.0%+2.7%0.168%
2/11/2026Deutsche Bank AG10,261$283K0.0%-5.8%0.010%
2/11/2026Franklin Resources Inc.25,386$699K0.0%+60.4%0.026%
2/11/2026Fiera Capital Corp71,007$1.96M0.0%-23.8%0.072%
2/10/2026TD Asset Management Inc1,193,208$32.91M0.0%+1.0%1.217%
2/10/2026Cibc World Market Inc.354,069$9.76M0.0%-4.2%0.361%
2/10/2026CIBC Asset Management Inc131,500$3.63M0.0%-2.5%0.134%
2/10/2026Goldman Sachs Group Inc.285,377$7.86M0.0%-43.8%0.291%
2/10/2026Norges Bank1,079,090$29.73M0.0%N/A1.100%
2/10/2026Savant Capital LLC11,372$313K0.0%N/A0.012%
2/9/2026Royce & Associates LP164,500$4.53M0.0%+22.3%0.168%
2/9/2026Legal & General Group Plc542,023$14.93M0.0%+9.6%0.553%
2/6/2026Marathon Asset Management Ltd1,097,711$30.28M1.2%-5.9%1.119%
2/2/2026Van Berkom & Associates Inc.269,136$7.43M0.2%-0.3%0.274%
1/29/2026Pictet Asset Management Holding SA16,006$442K0.0%+3.0%0.016%
1/29/2026UBS Group AG228,774$6.30M0.0%-1.2%0.233%
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1/29/2026Vanguard Group Inc.3,397,166$93.58M0.0%+1.7%3.464%
1/29/2026Montrusco Bolton Investments Inc.254,681$7.03M0.1%-10.3%0.260%
1/27/2026TD Waterhouse Canada Inc.966,349$26.50M0.2%-32.4%0.985%
1/27/2026Zurcher Kantonalbank Zurich Cantonalbank64,639$1.78M0.0%-29.4%0.066%
1/23/2026Third View Private Wealth LLC12,264$338K0.0%N/A0.013%
1/22/2026Massachusetts Financial Services Co. MA558,675$15.39M0.0%-1.9%0.570%
1/16/2026Aberdeen Group plc20,007$551K0.0%+7.6%0.020%
11/17/2025Quarry LP1,238$32K0.0%N/A0.001%
11/17/2025PenderFund Capital Management Ltd.20,000$523K0.1%N/A0.020%
11/17/2025National Bank of Canada FI420,025$10.83M0.0%-4.3%0.428%


ATS Institutional Ownership - Frequently Asked Questions

During the previous two years, 145 institutional investors and hedge funds held shares of ATS. The most heavily invested institutionals were Turtle Creek Asset Management Inc. ($254.16M), Royal Bank of Canada ($218.88M), EdgePoint Investment Group Inc. ($202.08M), Beutel Goodman & Co Ltd. ($198.61M), Capital World Investors ($105.21M), Vanguard Group Inc. ($93.58M), and Bank of Montreal Can ($83.27M).Learn more on ATS's institutional investors.

75.84% of ATS's stock is owned by institutional investors. Learn more on ATS's institutional investor holdings.

Of the 121 institutional investors that purchased ATS's stock in the last 24 months, the following investors and hedge funds have bought the highest volume of shares: Beutel Goodman & Co Ltd. ($5.43M), Hill City Capital LP ($4.60M), EdgePoint Investment Group Inc. ($3.68M), Norges Bank ($3.13M), Connor Clark & Lunn Investment Management Ltd. ($3.07M), Alberta Investment Management Corp ($2.67M), and Fairfax Financial Holdings Ltd. Can ($2.43M).

Institutional investors have bought a total of 21,105,061 shares in the last 24 months. This purchase volume represents approximately $593.83M in transactions.

Of the 38 institutional investors that sold ATS's stock in the last 24 months, the following investors and hedge funds have sold the highest volume of shares: Mackenzie Financial Corp ($651.85K), TD Waterhouse Canada Inc. ($485.97K), ACK Asset Management LLC ($346.20K), Connor Clark & Lunn Investment Management Ltd. ($315.56K), Principal Financial Group Inc. ($257.40K), Goldman Sachs Group Inc. ($222.51K), and Bank of America Corp DE ($154.51K).

Institutional investors have sold a total of 3,341,938 shares in the last 24 months. This volume of shares sold represents approximately $91.50M in transactions.


Related Companies

Institutional ownership data for NYSE:ATS is compiled from quarterly 13F filings submitted to the U.S. Securities and Exchange Commission (SEC), with the most recent received on 9/15/2026. New 13F filings are added each quarter as they're published.
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