KLA CORP (KLAC)
Data as of , from SEC Form 4 filings.
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About KLA CORP (KLAC)
KLA is one of the largest semiconductor wafer fabrication equipment, or WFE, manufacturers in the world. It specializes in the market segment of semiconductor process control, wherein machines inspect semiconductor wafers during research and development and manufacturing for defects and verify precise measurements. In this section of the market, KLA holds a majority share. It also has a small exposure to the etch and deposition segments of the WFE market. It counts as top customers the largest chipmakers in the world, including TSMC and Samsung.
- MILPITAS, CA
- 17,200
- 1980
- XNAS
KLAC Form 4 activity by transaction type, last 90 days
| Form 4 transaction type | Transactions | Shares | Total value |
|---|---|---|---|
| Open-market sale | 13 | 334,445 | $65.35M |
| Grant or award | 17 | 983,320 | |
| Tax withholding / forfeiture | 41 | 572,351 |
Dollar totals cover purchases and sales only (codes P and S). Grants, option exercises, gifts and tax withholding are counted in shares, because none of them is a trade at a market price.
KLAC insider transactions (Form 4)
67104 Form 4 filings on record, the earliest from Nov 8, 2024, newest first. Filing history page 3 of 3.
| Date | Insider | Transaction | Security | Shares | Price | Value |
|---|---|---|---|---|---|---|
| Brian Lorig - Officer | Open-market sale | Common Stock | 8,049 | $91.37 | $7.35M | |
| Richard P. Wallace - Officer | Open-market sale | Common Stock | 10,801 | $91.37 | $9.87M | |
| Richard P. Wallace - Officer | Gift | Common Stock | 804 | $0.00 | - | |
| Mary Beth Wilkinson - Officer | Open-market sale | Common Stock | 1,022 | $91.30 | $933K | |
| Virendra A. Kirloskar - Officer | Open-market sale | Common Stock | 338 | $91.30 | $309K | |
| Brian Lorig - Officer | Grant or award | Common Stock | 4,472 | $0.00 | - | |
| Brian Lorig - Officer | Tax withholding / forfeiture | Common Stock | 1,109 | $88.83 | $985K | |
| Brian Lorig - Officer | Grant or award | Common Stock | 2,465 | $0.00 | - | |
| Brian Lorig - Officer | Grant or award | Common Stock | 2,317 | $0.00 | - | |
| Mary Beth Wilkinson - Officer | Grant or award | Common Stock | 3,578 | $0.00 | - | |
| Mary Beth Wilkinson - Officer | Tax withholding / forfeiture | Common Stock | 766.8 | $88.83 | $681K | |
| Mary Beth Wilkinson - Officer | Grant or award | Common Stock | 2,465 | $0.00 | - | |
| Mary Beth Wilkinson - Officer | Grant or award | Common Stock | 1,145 | $0.00 | - | |
| Ahmad A. Khan - Officer | Grant or award | Common Stock | 9,390 | $0.00 | - | |
| Ahmad A. Khan - Officer | Tax withholding / forfeiture | Common Stock | 2,328 | $88.83 | $2.07M | |
| Ahmad A. Khan - Officer | Grant or award | Common Stock | 6,165 | $0.00 | - | |
| Ahmad A. Khan - Officer | Grant or award | Common Stock | 3,653 | $0.00 | - | |
| Bren D. Higgins - Officer | Grant or award | Common Stock | 8,943 | $0.00 | - | |
| Bren D. Higgins - Officer | Tax withholding / forfeiture | Common Stock | 2,217 | $88.83 | $1.97M | |
| Bren D. Higgins - Officer | Grant or award | Common Stock | 6,165 | $0.00 | - | |
| Bren D. Higgins - Officer | Grant or award | Common Stock | 3,653 | $0.00 | - | |
| Virendra A. Kirloskar - Officer | Grant or award | Common Stock | 1,341 | $0.00 | - | |
| Virendra A. Kirloskar - Officer | Tax withholding / forfeiture | Common Stock | 332.43 | $88.83 | $295K | |
| Virendra A. Kirloskar - Officer | Grant or award | Common Stock | 417.14 | $0.00 | - | |
| Richard P. Wallace - Officer | Grant or award | Common Stock | 36,219 | $0.00 | - | |
| Richard P. Wallace - Officer | Tax withholding / forfeiture | Common Stock | 8,979 | $88.83 | $7.98M | |
| Richard P. Wallace - Officer | Grant or award | Common Stock | 9,248 | $0.00 | - | |
| Richard P. Wallace - Officer | Grant or award | Common Stock | 10,295 | $0.00 | - | |
| Brian Lorig - Officer | Tax withholding / forfeiture | Common Stock | 952.68 | $91.56 | $872K | |
| Brian Lorig - Officer | Tax withholding / forfeiture | Common Stock | 317.31 | $91.56 | $291K | |
| Mary Beth Wilkinson - Officer | Tax withholding / forfeiture | Common Stock | 823.36 | $91.56 | $754K | |
| Mary Beth Wilkinson - Officer | Tax withholding / forfeiture | Common Stock | 274.24 | $91.56 | $251K | |
| Mary Beth Wilkinson - Officer | Tax withholding / forfeiture | Common Stock | 342.8 | $91.56 | $314K | |
| Mary Beth Wilkinson - Officer | Open-market sale | Common Stock | 1,920 | $91.70 | $1.76M | |
| Ahmad A. Khan - Officer | Tax withholding / forfeiture | Common Stock | 2,501 | $91.56 | $2.29M | |
| Ahmad A. Khan - Officer | Tax withholding / forfeiture | Common Stock | 833.44 | $91.56 | $763K | |
| Bren D. Higgins - Officer | Tax withholding / forfeiture | Common Stock | 2,263 | $91.56 | $2.07M | |
| Bren D. Higgins - Officer | Tax withholding / forfeiture | Common Stock | 754.11 | $91.56 | $690K | |
| Virendra A. Kirloskar - Officer | Tax withholding / forfeiture | Common Stock | 329.3 | $91.56 | $302K | |
| Virendra A. Kirloskar - Officer | Tax withholding / forfeiture | Common Stock | 118.99 | $91.56 | $109K | |
| Virendra A. Kirloskar - Officer | Open-market sale | Common Stock | 511 | $91.70 | $469K | |
| Richard P. Wallace - Officer | Tax withholding / forfeiture | Common Stock | 9,648 | $91.56 | $8.83M | |
| Richard P. Wallace - Officer | Tax withholding / forfeiture | Common Stock | 2,144 | $91.56 | $1.96M | |
| Brian Lorig - Officer | Tax withholding / forfeiture | Common Stock | 328.22 | $88.66 | $291K | |
| Brian Lorig - Officer | Tax withholding / forfeiture | Common Stock | 369.37 | $88.66 | $327K | |
| Mary Beth Wilkinson - Officer | Tax withholding / forfeiture | Common Stock | 181.68 | $88.66 | $161K | |
| Mary Beth Wilkinson - Officer | Tax withholding / forfeiture | Common Stock | 255.39 | $88.66 | $226K | |
| Mary Beth Wilkinson - Officer | Open-market sale | Common Stock | 763 | $89.68 | $684K | |
| Ahmad A. Khan - Officer | Tax withholding / forfeiture | Common Stock | 722.38 | $88.66 | $640K | |
| Ahmad A. Khan - Officer | Tax withholding / forfeiture | Common Stock | 775.93 | $88.66 | $688K | |
| Bren D. Higgins - Officer | Tax withholding / forfeiture | Common Stock | 722.38 | $88.66 | $640K | |
| Bren D. Higgins - Officer | Tax withholding / forfeiture | Common Stock | 738.74 | $88.66 | $655K | |
| Virendra A. Kirloskar - Officer | Tax withholding / forfeiture | Common Stock | 54.98 | $88.66 | $49K | |
| Virendra A. Kirloskar - Officer | Tax withholding / forfeiture | Common Stock | 77.11 | $88.66 | $68K | |
| Virendra A. Kirloskar - Officer | Open-market sale | Common Stock | 320 | $89.68 | $287K | |
| Richard P. Wallace - Officer | Tax withholding / forfeiture | Common Stock | 1,944 | $88.66 | $1.72M | |
| Richard P. Wallace - Officer | Tax withholding / forfeiture | Common Stock | 1,995 | $88.66 | $1.77M | |
| Brian Lorig - Officer | Tax withholding / forfeiture | Common Stock | 300.46 | $87.90 | $264K | |
| Mary Beth Wilkinson - Officer | Tax withholding / forfeiture | Common Stock | 136.26 | $87.90 | $120K | |
| Ahmad A. Khan - Officer | Tax withholding / forfeiture | Common Stock | 450.68 | $87.90 | $396K | |
| Bren D. Higgins - Officer | Tax withholding / forfeiture | Common Stock | 450.68 | $87.90 | $396K | |
| Virendra A. Kirloskar - Officer | Tax withholding / forfeiture | Common Stock | 37.69 | $87.90 | $33K | |
| Richard P. Wallace - Officer | Tax withholding / forfeiture | Common Stock | 1,321 | $87.90 | $1.16M | |
| Virendra A. Kirloskar - Officer | Other | Common Stock | 39.27 | $54.11 | $21K | |
| Virendra A. Kirloskar - Officer | Open-market sale | Common Stock | 39 | $89.15 | $35K | |
| Brian Lorig - Officer | Other | Common Stock | 39.27 | $54.11 | $21K | |
| Brian Lorig - Officer | Tax withholding / forfeiture | Common Stock | 1,052 | $88.99 | $936K |
See every KLAC filing on record
These pages show the latest 90 of 104 Form 4 filings on record. The 7-day demo shows all 104, and sign-up brings you back to this table.
Recent KLAC Form 144 notices of proposed sale
3An insider files Form 144 before selling restricted or control stock. It announces a planned sale. If the sale goes ahead, it shows up later on a Form 4.
| Filed | Filer | Relationship | Shares | Market value | Notice |
|---|---|---|---|---|---|
| WALLACE RICHARD P | Officer, Director | 72,019 | $12.38M | View on EDGAR | |
| Lorig Brian | Officer | 59,586 |
Stock trades in KLAC disclosed by members of the U.S. House in the last 12 months, newest first. Values are the ranges as filed.
| Member | Type | Traded | Disclosed | Value range | Owner | Days to disclose | Filing |
|---|---|---|---|---|---|---|---|
 Michael A. RulliRepublican, OH-06 | Purchase |
KLAC insider trading FAQ
What is the latest insider trade for KLAC?
KLA CORP (KLAC) had 33 insider filings in the last 90 days, with the most recent on 2026-09-16. The full record for KLAC runs to 104 Form 4 filings, the earliest from 2024-11-08. InsiderAlpha adds new Form 4, Form 144 and 8-K filings as they arrive from SEC EDGAR.
How many insiders are buying KLAC stock?
No insider purchases of KLAC were filed in the last 90 days.
How many insiders are selling KLAC stock?
13 insider sales of KLAC were filed in the last 90 days, totaling $65.35M.
Where can I see KLAC SEC filings (Form 4, 10-K, 10-Q, 8-K)?
This page collects KLAC Form 4 insider transactions, Form 144 sale notices and 8-K filings in one place. Annual 10-K and quarterly 10-Q reports live on the company's SEC EDGAR page.
More Information Technology companies with insider activity
Recent insider filings
10The EDGAR links open each original Form 4, so you can check any number on this page against the filing it came from.
- - Richard P. Wallace view on EDGAR
- - Brian Lorig view on EDGAR
- - Bren D. Higgins view on EDGAR
- - Ahmad A. Khan view on EDGAR
- - Richard P. Wallace view on EDGAR
- - Virendra A. Kirloskar view on EDGAR
- - Mary Beth Wilkinson view on EDGAR
- - Richard P. Wallace view on EDGAR
- - Brian Lorig view on EDGAR
Related companies with recent insider activity
Learn more
- Insider selling: signal or noise?
- Why most insider sales are routine, and the few patterns worth a second look.
- Form 144 vs Form 4
- A Form 144 announces a planned sale; the Form 4 reports it after it happens.
- Insider activity in Information Technology
- Where KLAC's peers are being bought and sold.
- Every recent Form 4
- The market-wide feed, updated as filings arrive from SEC EDGAR.
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