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Ati Inc

ATI
Exchange
NYSE
Industry
Steel Pipe & Tubes
SEC CIK
0001018963

In the last 90 days, Ati Inc insiders filed 0 open-market purchases and 9 sales; 795 institutions reported holding it in 13F filings for Q2 2026, worth $25.1B in total; 3 superinvestors hold it, including Viking Global Investors and Soros Fund Management.

Q1 2026 vs. Q4 2025

How the institutions holding Ati Inc changed between Q4 2025 and Q1 2026.

All holders in Q1 2026All holders in Q4 2025

13F holders of ATI: Q4 2025 compared with Q1 2026
MeasureQ4 2025Of which not filed for Q1 2026Q1 2026Change
Holders5708678+116
Shares128.3M14.8M127.4M+13.8M (+12.2%)
Value$14.7B$1.69B$18.5B+$5.46B (+41.9%)

8 institutions that held it in Q4 2025 haven't filed for Q1 2026 yet. Not filing isn't selling, so the changes leave them out.

New holders (167)

Institutions that held Ati Inc at the end of Q1 2026 but not at the end of Q4 2025.

Showing the largest 100 of 167 by value.

Institutions new to ATI in Q1 2026
InstitutionSharesValue% of portfolio
Vanguard Capital Management LLC6,124,128$890.8M0.02%
Vanguard Portfolio Management LLC5,821,508$846.8M0.04%
Viking Global Investors LPSuperinvestorViking Global Investors3,332,843$484.8M1.36%
Vanguard Fiduciary Trust Co844,377$122.8M0.03%
Artemis Investment Management LLP721,505$105.0M1.11%
Freestone Grove Partners LP575,873$83.8M0.61%
Square Wave Capital, LLC366,400$53.3M12.89%
Aventail Capital Group, LP185,312$27.0M1.30%
CIBC Bancorp USA Inc.106,915$15.6M0.02%
Vanguard Asset Management, Ltd104,824$15.2M0.01%
Tudor Investment Corp Et Al88,935$12.9M0.07%
Rokos Capital Management LLP80,343$11.7M0.21%
Anomaly Capital Management, LP74,830$10.9M0.66%
Vanguard Global Advisers, LLC55,668$8.10M0.00%
Soros Fund Management LLCSuperinvestorSoros Fund Management52,832$7.68M0.11%
RPg Family Wealth Advisory, LLC44,103$6.42M1.34%
Quadrature Capital Ltd41,620$6.05M0.07%
Aquatic Capital Management LLC40,380$5.87M0.17%
Occudo Quantitative Strategies LP32,798$5.10M0.28%
Vanguard Investments Australia, Ltd.34,056$4.95M0.01%
Moore Capital Management, LP33,916$4.93M0.18%
Spire Wealth Management33,596$4.89M0.17%
Y-Intercept (Hong Kong) Ltd31,620$4.60M0.09%
Pinebridge Investments LLC28,258$4.11M0.03%
Mivtachim The Workers Social Insurance Fund Ltd. (Under Special Management)24,000$3.49M0.44%
Bridgewater Associates, LP21,950$3.19M0.01%
Axq Capital, LP21,692$3.16M0.41%
Legacy Capital Wealth Management, LLC19,271$2.80M1.64%
Park Avenue Securities LLC19,049$2.77M0.02%
Entropy Technologies, LP19,026$2.77M0.13%
Bridgeway Capital Management, LLC17,900$2.60M0.05%
Donoghue Forlines LLC16,225$2.36M0.65%
Twin Tree Management, LP14,980$2.18M0.46%
Allstate Corp14,951$2.17M0.02%
Little House Capital LLC14,447$2.10M0.54%
PVG Asset Management Corp10,475$2.05M1.22%
Aigen Investment Management, LP14,063$2.05M0.53%
Oak Thistle LLC12,095$1.76M0.17%
Sigma Planning Corp10,517$1.53M0.04%
Atom Investors LP9,762$1.42M0.10%
Arista Wealth Management, LLC9,221$1.34M0.16%
Oppenheimer & Co Inc8,922$1.30M0.02%
Integrated Quantitative Investments LLC8,735$1.27M0.23%
Bank Julius Baer & Co. Ltd, Zurich8,769$1.20M0.00%
Illinois Municipal Retirement Fund7,601$1.11M0.01%
Brighton Jones LLC7,566$1.10M0.02%
Precision Wealth Strategies, LLC6,939$1.01M0.33%
Pinnbrook Capital Management LP6,900$1.00M0.82%
Friedenthal Financial6,741$980.5K0.49%
Fairvoy Private Wealth, LLC6,043$879.0K0.21%
Mitsubishi UFJ Trust & Banking Corp5,903$858.6K0.00%
South Dakota Investment Council5,300$771.0K0.01%
Campbell & CO Investment Adviser LLC5,233$761.2K0.04%
Oakmont Investment Advisors, Inc.5,204$757.0K0.69%
West Michigan Advisors, LLC5,023$730.6K0.16%
Y.D. More Investments Ltd4,725$687.3K0.03%
PFG Advisors4,724$687.2K0.03%
Two Sigma Securities, LLC4,474$650.8K0.08%
Caitong International Asset Management Co., Ltd4,384$637.7K0.12%
Alphadyne Asset Management LP4,176$607.4K0.08%
Beacon Pointe Advisors, LLC3,652$531.2K0.00%
Gateway Wealth Partners, LLC3,439$500.2K0.02%
Prospera Financial Services Inc3,288$478.2K0.01%
Headlands Technologies LLC3,287$478.1K0.05%
Gateway Investment Advisers LLC3,278$476.8K0.01%
Gsa Capital Partners LLP3,147$458.0K0.03%
Trust Co of Oklahoma3,011$438.0K0.13%
Emerald Investment Advisers, LLC2,931$426.3K0.04%
DRW Securities, LLC2,816$409.6K0.02%
Cynosure Management, LLC2,749$399.9K0.05%
Bull Harbor Capital LLC2,686$390.7K0.10%
Cordatus Wealth Management LLC2,636$383.4K0.09%
Davenport & Co LLC2,590$376.7K0.00%
Chilton Investment Co LLC2,469$359.1K0.01%
Private Advisor Group, LLC2,422$352.3K0.00%
Bridgefront Capital, LLC2,359$343.1K0.09%
AE Wealth Management LLC2,349$341.7K0.00%
Truvestments Capital LLC2,342$340.7K0.06%
Stephens Inc2,267$329.8K0.00%
TCW Group Inc2,220$322.9K0.00%
Scientech Research LLC2,215$322.2K0.27%
Kentucky Retirement Systems8,915$318.0K0.02%
Chicago Partners Investment Group LLC2,034$311.8K0.01%
Sig Brokerage, LP2,102$305.8K0.09%
Kiley Juergens Wealth Management, LLC1,998$290.6K0.05%
VestGen Advisors, LLC1,805$290.6K0.01%
Baird Financial Group, Inc.1,940$282.2K0.00%
Citizens Financial Group Inc1,911$278.0K0.00%
Machina Capital S.A.S.1,900$276.4K0.05%
OpenArc Corporate Advisory, LLC1,898$276.1K0.00%
United Capital Financial Advisers, LLC1,789$260.2K0.00%
FORA Capital, LLC1,768$257.2K0.02%
Annex Advisory Services, LLC1,763$256.4K0.00%
Beese Fulmer Investment Management, Inc.1,717$249.8K0.02%
SmartHarvest Portfolios, LLC1,712$249.0K0.10%
Mainstream Capital Management LLC1,700$247.3K0.17%
Ausdal Financial Partners, Inc.1,680$244.4K0.01%
Avantax Planning Partners, Inc.1,678$244.1K0.01%
Twinbeech Capital LP1,671$243.1K0.03%
Capital Asset Advisory Services LLC1,475$242.0K0.01%

Sold out (51)

Institutions that held Ati Inc at the end of Q4 2025 and filed for Q1 2026 without it.

Institutions that sold out of ATI in Q1 2026
InstitutionShares, Q4 2025Value, Q4 2025
MUFG Securities EMEA plc277,000$31.8M
Cartenna Capital, LP260,000$29.8M
Voloridge Investment Management, LLC175,732$20.2M
Concentric Capital Strategies, LP161,956$18.6M
Weiss Asset Management LP119,031$13.7M
J. Goldman & Co LP114,246$13.1M
LTS One Management LP102,500$11.8M
Connor, Clark & Lunn Investment Management Ltd.100,869$11.6M
NEOS Investment Management LLC78,117$8.96M
SummitTX Capital, L.P.68,660$7.88M
Lansforsakringar Fondforvaltning AB (publ)63,028$7.23M
Sagefield Capital LP51,455$5.90M
Roubaix Capital, LLC37,284$4.28M
Mackenzie Financial Corp18,849$2.19M
Toronto Dominion Bank17,780$2.04M
Dockside LLC15,844$1.82M
Trexquant Investment LP14,551$1.67M
Arete Wealth Advisors, LLC13,236$1.52M
Simplex Trading, LLC9,545$1.10M
Quest Partners LLC9,519$1.09M
Redwood Investment Management, LLC9,495$1.09M
Walleye Trading LLC9,362$1.07M
Greenland Capital Management LP7,500$860.7K
Alps Advisors Inc6,042$693.4K
Sapience Investments, LLC5,893$676.3K
Madison Asset Management, LLC5,500$631.2K
Flow Traders U.S. LLC4,837$555.0K
Counterpoint Mutual Funds LLC4,360$500.4K
Whalen Wealth Management Inc.3,926$450.5K
Forum Financial Management, LP3,918$449.6K
Ewing Morris & Co. Investment Partners Ltd.3,800$441.4K
Group One Trading, L.P.3,651$419.0K
Two Sigma Advisers, LP2,900$332.8K
Parsonex Advisory Services, Inc.2,602$298.6K
Versor Investments LP2,355$270.3K
AA Financial Advisors, LLC2,033$233.3K
CIBC World Markets Inc.2,010$230.7K
Penserra Capital Management LLC1,908$218.0K
Oxford Asset Management LLP1,794$205.9K
Greenline Wealth Management LLC698$80.1K
Itau Unibanco Holding S.A.246$28.2K
SageView Advisory Group, LLC55$6.31K
Atlantic Union Bankshares Corp53$6.08K
Elyxium Wealth, LLC47$5.39K
Flagship Harbor Advisors, LLC45$5.16K
Reyes Financial Architecture, Inc.38$4.36K
Financial Network Wealth Advisors LLC19$2.18K
T. Rowe Price Investment Management, Inc.14$2.00K
Kayne Anderson Rudnick Investment Management LLC15$1.72K
Ameriflex Group, Inc.5$574
Optima Capital LLC4$459

Not filed for Q1 2026 yet (8)

Institutions that held Ati Inc at the end of Q4 2025 and haven't filed a 13F for Q1 2026. Not filing isn't selling, so they aren't counted as sold out.

Institutions holding ATI in Q4 2025 that haven't filed for Q1 2026
InstitutionShares, Q4 2025Value, Q4 2025
Vanguard Group Inc12,726,524$1.46B
Norges Bank1,732,195$198.8M
CIBC World Markets Corp177,444$20.4M
Comerica Bank72,427$8.31M
Keystone Investors Pte Ltd33,415$3.83M
Global Retirement Partners, LLC6,115$701.8K
Motiv8 Investments LLC2,550$293.0K
CIBC Private Wealth Group, LLC950$109.0K