KLA Corporation (KLAC)Parnassus Investments, LLC added to its stake +3.86M shares

4.4M

Shares reported · +3.86M vs prior quarter

3.5%

Disclosed portfolio weight

$1.33B

Reported value

Holdings as of

Jun 30, 2026

Filed

Jul 29, 2026

The story around this disclosure

Every dated public record OQRO holds about the company from 60 days before to 120 days after, oldest first. It shows what was going on; none of it is a stated reason for the trade.

1. Mar 27, 2026CongressDisclosed purchase of KLAC — reported range $1,001 - $15,000
2. Jun 11, 2026Company filing · Form 8-K · Bylaws or charterChanged its bylaws, charter or fiscal year
3. Jun 11, 2026InsiderCEO sold ~$9.99M of KLAC shares in the open market
4. Jul 1, 2026Insider · Their largest sale since 2021Officer sold ~$4.11M of KLAC shares in the open market
5. Jul 1, 2026CongressDisclosed purchase of KLAC — reported range $1,001 - $15,000
6. Jul 2, 2026Insider · 2 peopleInsiders: 2 sales (~$7.4M)
7. Jul 28, 2026Company filing · Form 8-K · ResultsReported its results

What came next

1. Aug 4, 2026Insider · 2 peopleInsiders: 2 sales (~$1.1M)
2. Aug 5, 2026Insider · 2 peopleInsiders: 2 sales (~$3.6M)
3. Aug 7, 2026Insider · 2 peopleInsiders: 2 sales (~$4.8M)
4. Aug 10, 2026Insider · 2 peopleInsiders: 2 sales (~$448K)
5. Aug 11, 2026Insider · 2 peopleInsiders: 2 sales (~$24.0M)
6. Aug 12, 2026InsiderCFO sold ~$6.61M of KLAC shares in the open market
7. Aug 13, 2026Insider · Their largest sale since 2017Officer sold ~$12.4M of KLAC shares in the open market
8. Sep 15, 2026InsiderCEO sold ~$12.4M of KLAC shares in the open market

How to read SEC Form 13F-HR

Form 13F is the quarterly report in which investment managers that oversee $100 million or more list the US-listed stocks and some other securities they held on the last day of the quarter.

Full guide: What is an SEC Form 13F?

What else is on file for KLA Corporation

For KLA Corporation, OQRO holds 14 insider filings (SEC Form 4 or Form 144), 2 Congress trade reports and 143 fund holdings reports (13F) dated in the last 90 days.

These are records OQRO holds, counted by their date, not a measure of how much trading took place. Routine paperwork such as option exercises and tax withholding is left out. Everything for the company is on its KLAC page.

How this filing works

• SEC Form 13F

Other disclosures at KLA Corporation

• SEC Form 4Sep 16, 2026
• SEC Form 144Sep 15, 2026
• SEC Form 13F-HRAug 26, 2026
• SEC Form 13F-HRAug 25, 2026
• SEC Form 13F-HRAug 18, 2026
• SEC Form 13F-HRAug 14, 2026

Everything OQRO holds on this company is on its KLAC page.