1 tracked superinvestor hold ATI INC (ATI), worth $227M combined, led by Andreas Halvorsen. Smart money is trimming ATI as of the latest 13F filings.
Current price
$210.65
+173.0%
1Y
Globally, ATI Inc. stands as a premier manufacturer and supplier of specialized materials and complex components. The enterprise's operations are strategically divided into two primary divisions: High Performance Materials & Components (HPMC) and Advanced Alloys & Solutions (AA&S). The HPMC segment is responsible for creating a diverse range of advanced substances, including titanium and its…
Market cap
$21.3B
P/E
51.24
Div yield
0.0%
Revenue YoY
5.2%
Analyst target
$248
Snapshot for context. For deep analysis use a stock screener — this page is about who owns it.
Superinvestors holding
1
tracked 13F / N-PORT funds
Combined value
$227M
disclosed long exposure
Tier-1 conviction
1
concentrated holders
Net this quarter
-1
0 buying · 1 selling
Smart money is net reducing ATI: 1 funds trimmed versus 0 adding.
ATI INC (ATI) is held by 1 tracked funds worth $227M combined, 1 of them concentrated Tier-1 managers whose positions carry real conviction.
The largest position belongs to Andreas Halvorsen at 0.6% of their book — no single tracked manager treats it as an outsized, top-weighted bet.
No tracked fund opened a new position this quarter; 0 added and 1 trimmed, a net reduction.
| Investor | Move | % of their portfolio | Position value |
|---|---|---|---|
| Trimmed | 0.6% | $227M |
Tier badge = signal quality: 1 concentrated conviction · 2 quant/multi (context) · 3 retail & diversified. Only Tier 1 holdings feed the consensus signal.
4 insiders filed SEC Form 144 for $47M of proposed sales in the last 90 days. A 144 is filed before the trade — see who else is selling.
| Insider | Role | Shares | Value | Filed |
|---|---|---|---|---|
| Harris Timothy J | Officer | 16,500 | $3M | 2026-09-08 |
| Morehouse David J | Director | 2,485 | $501K | 2026-09-02 |
| Harris Timothy J | Officer | 16,500 | $3M | 2026-08-31 |
| Harris Timothy J | Officer | 16,500 | $3M | 2026-08-24 |
| Fields Kimberly A | Officer & Director | 34,823 | $8M | 2026-08-17 |
| Wetherbee Robert S | Former Officer & Director | 43,500 | $10M | 2026-08-10 |
| Fields Kimberly A | Officer & Director | 31,757 | $6M | 2026-07-28 |
| Fields Kimberly A | Officer & Director | 40,000 | $8M | 2026-07-07 |
Which superinvestors own ATI?
1 tracked funds hold ATI INC (ATI), the largest being Andreas Halvorsen (Viking Global Investors) at 0.6% of its 13F portfolio. 1 of them are concentrated Tier-1 conviction managers.
Is smart money buying or selling ATI?
In the most recent 13F quarter, 0 tracked funds added or opened ATI and 1 trimmed it.
How much ATI do tracked funds hold?
Combined disclosed long exposure to ATI across tracked superinvestors is $227M as of the Jun 2026 filings.
One email when a tracked manager opens, adds to or files to sell a position — from Form 4, 13D and Form 144, not the 45-day-old 13F.
Holdings aggregated from the latest SEC 13F & N-PORT filings via FMP · Jun 2026 quarter. Long equity positions only, reported with up to a 45-day delay — for activity between filings see real-time moves. Not financial advice.