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.
Superinvestors holding ATI, Q2 2026
3 superinvestors report holding Ati Inc on Form 13F, worth $242.0M in total. Weight is Ati Inc's share of each 13F portfolio; actions compare shares with Q1 2026.
| Superinvestor | % of portfolio | Shares | Value | vs. previous quarter |
|---|---|---|---|---|
| Viking Global InvestorsAndreas Halvorsen | 0.6% | 1,153,880 | $227.4M | Reduced−65.4% |
| Soros Fund ManagementGeorge Soros | 0.2% | 73,339 | $14.5M | Added+38.8% |
| ARK InvestCathie Wood | <0.1% | 487 | $96.0K | Reduced−28.3% |
Moves by quarter
Superinvestors that opened, added to, trimmed or sold out of ATI each quarter, comparing shares with the quarter before. A superinvestor that didn't file for a quarter isn't listed, and isn't counted as selling.
Q2 2026
3 superinvestors holding at quarter end
- Added
- Soros Fund Management (+38.8%)
- Reduced
- Viking Global Investors (−65.4%), ARK Invest (−28.3%)
Q1 2026
3 superinvestors holding at quarter end
- New
- Viking Global Investors, Soros Fund Management
- Reduced
- ARK Invest (−23.6%)
Q4 2025
1 superinvestor holding at quarter end
- Added
- ARK Invest (+19.8%)
Q3 2025
1 superinvestor holding at quarter end
- Added
- ARK Invest (+378.7%)
- Sold out
- Soros Fund Management
Q2 2025
2 superinvestors holding at quarter end
- Reduced
- Soros Fund Management (−40.9%), ARK Invest (−90.0%)
Q1 2025
2 superinvestors holding at quarter end
- Added
- Soros Fund Management (+56.8%), ARK Invest (+8.4%)
Q4 2024
2 superinvestors holding at quarter end
- Added
- Soros Fund Management (+98.3%)
- Reduced
- ARK Invest (−14.8%)
Q3 2024
2 superinvestors holding at quarter end
- Added
- Soros Fund Management (+11.5%)
- Reduced
- ARK Invest (−29.4%)
Q2 2024
2 superinvestors holding at quarter end
- New
- Soros Fund Management
- Reduced
- ARK Invest (−28.1%)
Q1 2024
1 superinvestor holding at quarter end
- Reduced
- ARK Invest (−15.2%)
Q4 2023
1 superinvestor holding at quarter end
- Reduced
- ARK Invest (−7.6%)
Q3 2023
1 superinvestor holding at quarter end
- Reduced
- ARK Invest (−11.2%)
Q2 2023
1 superinvestor holding at quarter end
- Reduced
- ARK Invest (−14.3%)
Q1 2023
1 superinvestor holding at quarter end
- Reduced
- ARK Invest (−22.0%)
Q4 2022
1 superinvestor holding at quarter end
- Reduced
- ARK Invest (−28.3%)
Q3 2022
1 superinvestor holding at quarter end
- Added
- ARK Invest (+6.1%)
Q2 2022
1 superinvestor holding at quarter end
- Reduced
- ARK Invest (−44.6%)
Q1 2022
1 superinvestor holding at quarter end
- Reduced
- ARK Invest (−37.2%)
Q4 2021
1 superinvestor holding at quarter end
- Added
- ARK Invest (+5.8%)
Q3 2021
1 superinvestor holding at quarter end
- Reduced
- ARK Invest (−16.2%)
Q2 2021
1 superinvestor holding at quarter end
- Reduced
- ARK Invest (−14.6%)