Stock ownership
ATI INC
- Ticker
- ATI
- CUSIP
- 01741R102
- Held by
- 3 funds
- Combined value
- $497,830,595
+% bought more, −% sold down — each fund's last-quarter move (change in share count).
| Fund | Quarter | Last quarter | Value | % of fund |
|---|---|---|---|---|
| Viking Global Investors position history | Q1 2026 | NEW | $484,795,343 | 1.36% |
| Tudor Investment Corp position history | Q1 2026 | NEW | $12,936,485 | 0.07% |
| ARK Investment Management position history | Q1 2026 | −24% | $98,767 | 0.0% |