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ATI · Ati Inc · Holdings

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$191.84 +3.71 (+1.97%) At close · Oct 9
Market Cap
$26.12B
Shares
136.17M
Volume · Oct 9 817.92K Avg daily vol (3M) 1.64M

Institutional ownership from SEC Form 13F filings. Investment managers with more than $100 million in U.S. equities must disclose their positions every quarter, within 45 days of quarter-end, so the holdings shown can lag the market by up to a quarter.

Some SEC filings for this period have not finished importing. Holder totals and changes may be incomplete; these filings remain queued for recovery.
The Sep 30, 2026 filing window is still open — showing the latest known positions. Funds that have not filed yet carry their prior-quarter positions; a fund that filed without this stock counts as sold out. Each fund's Change is measured against its own previous reported quarter, shown in the Reported column. Pick a completed quarter in the Quarter selector below to put every fund on one quarter and see the stock-wide activity breakdown.
Holders: 800
Total Value: $25,433,919,543
Total Shares: 129,075,929
Showing 1–100 of 832 holdings by value · page 1 of 9

Institutional Ownership Trend

27 quarters

Holder Concentration

Across 797 13F filers
Top Holder
14.5%
Sep 2023 → Jun 2026 · range 11.7% – 15.0%
of institutional value
Top 5
32.2%
Sep 2023 → Jun 2026 · range 31.4% – 45.8%
of institutional value
Top 10
47.7%
Sep 2023 → Jun 2026 · range 47.7% – 60.8%
of institutional value
HHI
371
Sep 2023 → Jun 2026 · range 353 – 569
Broadly held
Showing 100 of 832
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Holder Value (USD) % of 13F Shares Open
Key facts CIK 1018963 CUSIP 01741R102 13F (30d) 36 filings 32 filers Visit website Investor relations