Question 1

How many shares of KLAC does PRIMECAP MANAGEMENT CO/CA/ own?

Accepted Answer

As of 2026-Q1, PRIMECAP MANAGEMENT CO/CA/ holds 2.4M shares of KLAC (KLA CORP).

Question 2

What is PRIMECAP MANAGEMENT CO/CA/'s KLAC position worth?

Accepted Answer

As of 2026-Q1, PRIMECAP MANAGEMENT CO/CA/'s KLAC position is worth $3.6B.

Question 3

Is PRIMECAP MANAGEMENT CO/CA/ buying or selling KLAC?

Accepted Answer

In 2026-Q1, PRIMECAP MANAGEMENT CO/CA/ decreased their KLAC position (-15.2% change in shares).

Question 4

When did PRIMECAP MANAGEMENT CO/CA/ first buy KLAC?

Accepted Answer

Based on available 13F filings, PRIMECAP MANAGEMENT CO/CA/ first reported a position in KLAC in 2026-Q1. They have held the position across 30 quarters.