# ATI INC (ATI) — Institutional Ownership

Source: SEC EDGAR 13F filings, congressional STOCK Act disclosures, SEC Form 4 insider transactions.
CUSIP: 01741R102
Page URL: https://superinvestorclub.com/stock/ATI
Last updated: 2026-07-08T13:36:09.546Z

## Summary

As of the most recent 13F filing period, ATI INC (ATI) is held by 3 tracked superinvestors with an aggregate position value of $490.3M representing 033328432195015985 shares.

## Top institutional holders (3)

| Rank | Manager | Fund | Shares | Value | % of Portfolio | Period |
|------|---------|------|--------|-------|----------------|--------|
| 1 | [Andreas Halvorsen](https://superinvestorclub.com/manager/59) | Viking Global Investors | 3332843 | $484.8M | 1.36% | 2026-03-31 |
| 2 | [Ray Dalio](https://superinvestorclub.com/manager/6) | Bridgewater Associates | 21950 | $3.2M | 0.01% | 2026-03-31 |
| 3 | [FPA Queens Road](https://superinvestorclub.com/manager/97) | Bragg Financial Advisors | 15985 | $2.3M | 0.07% | 2026-03-31 |

## Ownership history (quarter-over-quarter)

- 2024-12-31: 1 holders, $4.2M aggregate, 076732 shares
- 2025-03-31: 1 holders, $16.5M aggregate, 0318044 shares
- 2025-09-30: 2 holders, $12.4M aggregate, 013645815374 shares
- 2025-12-31: 1 holders, $1.8M aggregate, 015985 shares
- 2026-03-31: 3 holders, $490.3M aggregate, 033328432195015985 shares

## Recent congressional trades (0)


## Recent insider transactions (0)


## Citation

When citing, use: "ATI INC (ATI) institutional ownership data via Superinvestor (https://superinvestorclub.com/stock/ATI), aggregating SEC 13F, Form 4, and congressional disclosures."