InvestorLens

ATI — ATI INC

Public company

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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

Why are billionaires buying ATI?

Built from public SEC filings and public economic data. Not a recommendation.

Confidence
88
Institutional Conviction
Strong accumulation · 7 buying vs 1 selling last quarter
79
Macro Tailwind
Macro conditions are mixed for this sector
52
Why? — Evidence & Confidence ▾

Of 8 tracked investors who changed their ATI position last quarter, 7 bought and 1 sold (88% buy-side). Macro conditions are mixed for this sector (Macro Tailwind 52/100 in a Squeeze regime).

Supporting evidence
  • +7 tracked investors added or increased positions last quarter (Paul Tudor Jones, Izzy Englander, Ken Griffin, …)
  • +8 tracked investors reported holding ATI at their latest filing
Contradicting evidence — always shown
  • −1 tracked investor reduced or exited last quarter (1 reduced, 0 sold out)
  • −13F data is disclosed up to 45 days after quarter end — positions may have changed since
Know the limits
  • · 13F disclosure lag (up to 45 days)
  • · Tracked investors are a sample, not the whole market
  • · Sector regime fit is a historical average, not a guarantee

Every InvestorLens score shows its evidence — including what argues against it. Model conviction-v1 · generated 8/4/2026.

About ATI INC (ATI)

ATI INC (ATI) appears in the most recent 13F filings of 8 tracked institutional investors. The largest disclosed position is held by Andreas Halvorsen (Viking Global Investors), valued at $485M. Across recent filings, tracked investors recorded 13 new positions, 1 increased, 1 reduced, and 1 exited. All data sourced from SEC 13F filings.

Smart Money Consensus™

Based on recent institutional activity in ATI

88
/100
Strong Institutional Accumulation
Added / Increased14
Reduced1
Exited1
BearishBullish
Crowded Trade Score™

How many top investors track ATI

53
/100
Moderate Interest
8investors

Several tracked investors have exposure.

UndiscoveredCrowded
151015+

ATI Ownership Composition

How ATI INC is held across tracked investor types, based on reported 13F positions.

Dominant Type
Other
70% of tracked value
Institutions
8
tracked investors
Total Reported
$970.1M
combined 13F value
Sectors3
  • Other70.0%
  • Hedge Funds29.9%
  • Growth Funds0.0%
Other(5)
70.0%
Hedge Funds(2)
29.9%
Growth Funds(1)
0.0%

Tracked investors reporting ATI

  • Andreas HalvorsenMar 31, 2026
    Viking Global Investors
    Shares
    3.3M
    Value
    $484.8M
    % Portfolio
    1.36%
  • Steve CohenMar 31, 2026
    Point72 Asset Management
    Shares
    1.9M
    Value
    $282.8M
    % Portfolio
    0.36%
  • Izzy EnglanderMar 31, 2026
    Millennium Management
    Shares
    626.8K
    Value
    $91.2M
    % Portfolio
    0.04%
  • Ken GriffinMar 31, 2026
    Citadel Advisors
    Shares
    557.4K
    Value
    $81.1M
    % Portfolio
    0.01%
  • Paul Tudor JonesMar 31, 2026
    Tudor Investment Corp
    Shares
    132.8K
    Value
    $19.3M
    % Portfolio
    0.04%
  • Ray DalioMar 31, 2026
    Bridgewater Associates
    Shares
    22K
    Value
    $3.2M
    % Portfolio
    0.01%
  • George SorosMar 31, 2026
    Soros Fund Management
    Shares
    52.8K
    Value
    $7.7M
    % Portfolio
    0.08%
  • Cathie WoodMar 31, 2026
    ARK Investment Management
    Shares
    679
    Value
    $98.8K
    % Portfolio
    0.00%

Recent activity

Frequently asked questions

How many institutional investors hold ATI?
8 tracked institutional investors disclosed a position in ATI (ATI INC) in their most recent 13F filing.
Who is the largest institutional holder of ATI?
Andreas Halvorsen, Viking Global Investors, holds the largest disclosed position in ATI, valued at $485M.
Did institutional ownership of ATI increase or decrease?
Across recent 13F filings, tracked investors recorded 13 new positions, 1 increased, 1 reduced, and 1 fully exited ATI.
Where does this ATI 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.