Stocks › ATI
ATI INC
ATI·NYSE·
United States·USD
United States·USD$194.69
+1.60 (+0.83%)
Close · Oct 6, 2026 · Close Prices from Tiingo.com
ATI
ATI INC · NYSE
Nasdaq 100S&P 500
Filings
Default90D1Y5YALL
ATIS&P 500 (rebased)
Congress BuyCongress SellInsider BuyInsider SellForm 1448-K ResultsLobbying
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Daily closes, adjusted for splits and dividends · Close Prices from Tiingo.comHover a marker, every one is a filing · move across the line for the crosshair
Congressional Trades
Recent trades of ATI by members of U.S. Congress · 1 on record
| Politician | Stock | Type | Filed | Traded | |
|---|---|---|---|---|---|
 Thomas MacArthurHouse · R · NJ |
ATIATI INC · Stock |
Sale $1,001 - $15,000 |
Jun 7, 2015 | May 27, 2015 | Filing ↗ |
Whale Activity
Position changes in ATI reported for 2026-09-30 by 1 tracked institutional filer
- Increased0
- New0
- Held0
- Decreased0
- Closed0
- No prior filing1
| Filer | Shares | Value | Change |
|---|---|---|---|
| Marathon Mission, Inc. | 1,606 | $304K | — |
KeyVex tracks a curated set of large 13F filers plus the largest positions in recent filings, so this is a sample of institutional activity, not the whole market.
Insider Trading
Net shares bought (+) or sold (−) on the open market by ATI insiders, by quarter · Form 4
Recent Insider Transactions
2,700 transactions on record · newest first
| Insider | Type | Shares | Price | Value | Date | |
|---|---|---|---|---|---|---|
| Harris Timothy JSenior VP and CDIO | Sale | −9,000 | $191.82 | $1.7M | Sep 21, 2026 | Form 4 ↗ |
| Harris Timothy JSenior VP and CDIO | Sale | −16.5K | $193.06 | $3.2M | Sep 14, 2026 | Form 4 ↗ |
| Harris Timothy JSenior VP and CDIO | Sale | −16.5K | $207.54 | $3.4M | Sep 8, 2026 | Form 4 ↗ |
| Morehouse David JDirector · Director | Sale | −2,485 | $201.61 | $501K | Sep 2, 2026 | Form 4 ↗ |
| Harris Timothy JSenior VP and CDIO | Sale | −16.5K | $210.01 | $3.5M | Aug 31, 2026 | Form 4 ↗ |
| Harris Timothy JSenior VP and CDIO | Sale | −16.5K | $206.92 | $3.4M | Aug 24, 2026 | Form 4 ↗ |
| Fields Kimberly AChair, President and CEO · Director | Sale | −9,116 | $231.72 | $2.1M | Aug 17, 2026 | Form 4 ↗ |
| Fields Kimberly AChair, President and CEO · Director | Sale | −8,131 | $230.66 | $1.9M | Aug 17, 2026 | Form 4 ↗ |
| Fields Kimberly AChair, President and CEO · Director | Sale | −4,598 | $232.43 | $1.1M | Aug 17, 2026 | Form 4 ↗ |
| Fields Kimberly AChair, President and CEO · Director | Sale | −2,000 | $229.56 | $459K | Aug 17, 2026 | Form 4 ↗ |
| Fields Kimberly AChair, President and CEO · Director | Sale | −1,000 | $228.32 | $228K | Aug 17, 2026 | Form 4 ↗ |
| Fields Kimberly AChair, President and CEO · Director | Sale | −31.8K | $190.99 | $6.1M | Jul 28, 2026 | Form 4 ↗ |
| Fields Kimberly AChair, President and CEO · Director | Sale | −4,878 | $184.34 | $899K | Jul 7, 2026 | Form 4 ↗ |
| Fields Kimberly AChair, President and CEO · Director | Sale | −400 | $187.50 | $75K | Jul 7, 2026 | Form 4 ↗ |
| Fields Kimberly AChair, President and CEO · Director | Sale | −388 | $185.10 | $72K | Jul 7, 2026 | Form 4 ↗ |
| Fields Kimberly AChair, President and CEO · Director | Sale | −2,200 | $181.36 | $399K | Jul 7, 2026 | Form 4 ↗ |
| Fields Kimberly AChair, President and CEO · Director | Sale | −2,000 | $180.00 | $360K | Jul 7, 2026 | Form 4 ↗ |
| Fields Kimberly AChair, President and CEO · Director | Sale | −2,000 | $179.25 | $359K | Jul 7, 2026 | Form 4 ↗ |
| Fields Kimberly AChair, President and CEO · Director | Sale | −200 | $186.36 | $37K | Jul 7, 2026 | Form 4 ↗ |
| Fields Kimberly AChair, President and CEO · Director | Sale | −200 | $180.85 | $36K | Jul 7, 2026 | Form 4 ↗ |
Fund Holders
Mutual funds and ETFs holding ATI · SEC Form N-PORT
| Fund | Shares | Value | % of fund | As of |
|---|---|---|---|---|
| iShares Core S&P Mid-Cap ETF iShares Trust | 4.7M | $920.5M | 0.74% | Jun 30, 2026 |
| VANGUARD TOTAL STOCK MARKET INDEX FUND VANGUARD INDEX FUNDS | 4.3M | $853.8M | 0.04% | Jun 30, 2026 |
| SMALLCAP World Fund Inc | 4.2M | $830.0M | 0.88% | Jun 30, 2026 |
| VANGUARD SMALL-CAP INDEX FUND VANGUARD INDEX FUNDS | 3.1M | $616.9M | 0.33% | Jun 30, 2026 |
| VANGUARD SMALL-CAP GROWTH INDEX FUND VANGUARD INDEX FUNDS | 1.8M | $355.6M | 0.76% | Jun 30, 2026 |
| Asset Allocation Fund AMERICAN FUNDS INSURANCE SERIES | 1.7M | $337.6M | 1.19% | Jun 30, 2026 |
| American Balanced Fund | 1.6M | $311.6M | 0.11% | Jun 30, 2026 |
| VANGUARD EXTENDED MARKET INDEX FUND VANGUARD INDEX FUNDS | 1.6M | $308.4M | 0.32% | Jun 30, 2026 |
| Growth Fund of America | 1.7M | $291.3M | 0.08% | May 31, 2026 |
| iShares U.S. Aerospace & Defense ETF iShares Trust | 1.4M | $272.5M | 1.89% | Jun 30, 2026 |
Mutual funds and ETFs whose N-PORT filings list ATI's shares (CUSIP 01741R102), each fund at its latest report since Mar 7, 2026, largest positions first. Bonds, options and short positions are left out.
Activist & Passive Stakes
Schedule 13D / 13G beneficial-ownership filings
- Capital World InvestorsSCHEDULE 13G/A · passive (13G) · 5.7M shares4.2%
May 14, 2026 · ↗
Corporate Lobbying
Estimated quarterly lobbying spending reported under the LDA, filings naming ATI INC as client
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Government Contracts
Federal awards to ATI INC · USAspending
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U.S. Patents
Recent USPTO applications naming ATI INC
No USPTO patent applications found for ATI INC.
Annual Financials
From ATI's 10-K filings · XBRL
No annual XBRL figures on record for ATI. KeyVex's fundamentals cover about 130 large companies so far.
Stock Splits
Every split and reverse split in the price history
- 1-for-2Reverse splitDec 2, 1999
Split dates and ratios from the price history · Close Prices from Tiingo.com
Material Events (8-K)
Corporate events filed with the SEC
- 8-K · Items 2.02, 9.01Results of operationsAug 6, 2026
EDGAR ↗ - 8-K · Items 1.01, 2.03, 8.01, 9.01Material agreement · Direct financial obligation · Other eventsJun 8, 2026
EDGAR ↗ - 8-K · Items 8.01, 9.01Other eventsJun 3, 2026
EDGAR ↗ - 8-K · Items 8.01, 9.01Other eventsJun 3, 2026
EDGAR ↗ - 8-K · Items 5.07, 9.01Shareholder voteMay 19, 2026
EDGAR ↗
About ATI INC
From SEC EDGAR company records
Industry (SIC 3317)Steel Pipe & Tubes
SectorIndustrials
HeadquartersDALLAS, TX
IncorporatedDE
SEC CIK0001018963 ↗
Former namesALLEGHENY TECHNOLOGIES INC, ALLEGHENY TELEDYNE INC