Data from public SEC 13F & STOCK Act filings, delayed up to ~45 days, partial holdings only — for research, not investment advice.
ATI
ATI INCData as of 2026 Q1 (03-31) · 13F snapshot
Summary
ATI INC (ATI) is held by 10 tracked hedge-fund managers, a combined reported value of ~$1.03B; the largest are Andreas Halvorsen, Steven Cohen, Izzy Englander. This quarter: 3 new, 3 added, 2 trimmed. Data as of 2026 Q1, from public SEC 13F filings, delayed up to ~45 days.
Attention · HighThis quarter · Heating up
Gurus holding10
Congress trades0
Price$198.48vs quarter-end+36.45%
Sectors0
This quarter's moves
Top holderAndreas HalvorsenNew3
Added3
Trimmed / sold2
Andreas HalvorsenNew large stake
Value $484.80M1.4% of portfolio3,332,8432026 Q1
Steven CohenAdd
Value $281.11M0.5% of portfolio1,932,5792026 Q1
Value $27.67M— of portfolio190,2002026 Q1
Dan LoebNew
Value $18.35M0.7% of portfolio300,0002006 Q1
Value $9.29M— of portfolio63,9002026 Q1
Value $1.02M— of portfolio7,0002026 Q1
Value $741.8K— of portfolio5,1002026 Q1
Value $654.6K— of portfolio4,5002026 Q1
Value $363.6K— of portfolio2,5002026 Q1
| Investor | Value | % of portfolio | Action |
|---|---|---|---|
| Andreas Halvorsen | $484.80M | 1.4% | New large stake |
| Steven Cohen | $281.11M | 0.5% | Add |
| Ken GriffinCALL | $27.67M | — | — |
| Dan Loeb | $18.35M | 0.7% | New |
| Ken GriffinPUT | $9.29M | — | — |
| Steven CohenPUT | $1.02M | — | — |
| Izzy EnglanderCALL | $741.8K | — | — |
| Steven CohenCALL | $654.6K | — | — |
| Izzy EnglanderPUT | $363.6K | — | — |