ATI Inc.
ATI Inc. (ATI) Stock Ownership
Institutional vs insider vs public ownership from 13F and float data — top holders, activity, and insider trades below.
SEC 13F · FMP · ATI · as of Sep 30, 2024
Ownership Breakdown
437
Institutional Holders
▲ 17 vs Q2
$8.89B
Total Inst. Value
▲ $1.55B vs Q2
136.47M
Shares Outstanding
freeFloat 98.87%
132.94M
13F Shares Held
▲ 645,559 vs Q2
Institutional ownership = 13F shares ÷ total outstanding. Insider % = 100 − free float. Public % = free float − institution %. Data: FMP /symbol-positions-summary + /shares-float + SEC EDGAR.
Top Institutional Holders
ATI largest shareholders · institutional ownership
Q3 2024 · SEC 13F
Showing top 10 holders
| Holder | Shares | % Owned | Weight | Value | Reported | Change |
|---|---|---|---|---|---|---|
BLACKROCK, INC. steel pipe & tubes | 15.86M | 12.32% | 12.32% | $1.06T | Nov 13, 2024 | NEW |
CAPITAL INTERNATIONAL INVESTORS steel pipe & tubes | 15.08M | 11.72% | 11.72% | $1.01T | Nov 13, 2024 | ▼ 13.3K |
VANGUARD GROUP INC steel pipe & tubes | 13.32M | 10.35% | 10.35% | $890.91B | Nov 13, 2024 | ▲ 87.8K |
FMR LLC steel pipe & tubes | 9.28M | 7.21% | 7.21% | $621.02B | Nov 13, 2024 | ▲ 2.02M |
STATE STREET CORP steel pipe & tubes | 5.41M | 4.21% | 4.21% | $362.23B | Nov 14, 2024 | ▼ 303.3K |
INVESCO LTD. steel pipe & tubes | 4.49M | 3.49% | 3.49% | $300.61B | Nov 12, 2024 | ▲ 47.2K |
CAPITAL WORLD INVESTORS steel pipe & tubes | 3.43M | 2.66% | 2.66% | $229.41B | Nov 13, 2024 | ▲ 559.8K |
AMERIPRISE FINANCIAL INC steel pipe & tubes | 3.14M | 2.44% | 2.44% | $210.29B | Nov 14, 2024 | ▼ 506.0K |
FRONTIER CAPITAL MANAGEMENT CO LLC steel pipe & tubes | 3.12M | 2.43% | 2.43% | $208.84B | Nov 14, 2024 | ▼ 11.0K |
DIMENSIONAL FUND ADVISORS LP steel pipe & tubes | 2.48M | 1.92% | 1.92% | $165.62B | Nov 7, 2024 | ▼ 31.3K |
Data from SEC Form 13F filings. Ownership bar normalised to largest holder. Change flags: isNew / isSoldOut / changeInSharesNumber (FMP extract-analytics/holder).
Institutional Activity
Q3 2024 vs prior quarter
Q3 2024
20
Increased
+5.39M shares3
New Positions
first time holders27
Decreased
−4.21M shares0
Sold Out
fully exitedNet shares change (top 50)
+1.18M
+5.39M / −4.21M
Net new holders
-4
3 new / 0 exited
Based on top 50 institutional holders by position size. Fields: isNew, isSoldOut, changeInSharesNumber (FMP extract-analytics/holder, limit=50).
Insider Buying vs Selling
ATI insider trading · insider activity
Source: SEC Form 4
Insiders have been primarily selling shares recently. Selling may be driven by pre-scheduled Rule 10b5-1 plans rather than negative sentiment.
0
Buy transactions
0
Sell transactions
0.00
Buy/Sell ratio
$0M
Total disposed
Recent Insider Transactions
Showing 10 most recent · Common Stock only
| Name · Role | Date | Type | Shares | Price | Value | After Trans. | Filing |
|---|---|---|---|---|---|---|---|
Fields Kimberly A Chair, President and CEO | Jun 2, 2026 | Sale | 25,823 | $177.97 | $4.60M | 251.9K | Form 4 ↗ |
Fields Kimberly A Chair, President and CEO | Jun 2, 2026 | Sale | 13,865 | $179.05 | $2.48M | 238.1K | Form 4 ↗ |
Fields Kimberly A Chair, President and CEO | Jun 2, 2026 | Sale | 13,164 | $179.71 | $2.37M | 224.9K | Form 4 ↗ |
Fields Kimberly A Chair, President and CEO | Jun 2, 2026 | Sale | 1,896 | $180.80 | $342.8K | 223.0K | Form 4 ↗ |
Fields Kimberly A Chair, President and CEO | Jun 2, 2026 | Sale | 2,000 | $181.90 | $363.8K | 221.0K | Form 4 ↗ |
Fields Kimberly A Chair, President and CEO | Jun 2, 2026 | Sale | 3,001 | $182.75 | $548.4K | 218.0K | Form 4 ↗ |
Sharma Ruby director | May 19, 2026 | Award | 905 | — | — | 7.3K | Form 4 ↗ |
Morehouse David J director | May 19, 2026 | Award | 1,743 | — | — | 38.3K | Form 4 ↗ |
Lydon-Rodgers Jean director | May 19, 2026 | Award | 905 | — | — | 1.5K | Form 4 ↗ |
Lund Elizabeth Hefley director | May 19, 2026 | Award | 905 | — | — | 1.5K | Form 4 ↗ |
Source: /insider-trading/search (FMP stable). Buy/Sell direction: acquisitionOrDisposition A=Buy, D=Sell. RSU vesting (M-Exempt) excluded from sentiment bar. All data from SEC EDGAR public filings.
About institutional & insider ownership
ATI Inc. (ATI) is primarily owned by institutional investors, who hold approximately 97.4% of total shares outstanding. Company insiders own approximately 1.13%, while retail and public investors account for the remaining 1.46%.
The largest institutional shareholder of ATI Inc. is BLACKROCK, INC., holding approximately 15.86 million shares — equal to 12.32% of outstanding shares — as of September 30, 2024.
A total of 437 institutional investors currently hold ATI stock, with a combined institutional value of approximately $8.89 billion as of the most recent 13F filing period.
Frequently asked questions
ATI ownershipATI Inc. (ATI) is primarily owned by institutional investors, who hold approximately 97.4% of shares. The largest shareholder is BLACKROCK, INC. with a 12.32% stake. Company insiders hold 1.13%. Data sourced from SEC Form 13F as of September 30, 2024.