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PRIMECAP MANAGEMENT CO/CA/: KLAC position timeline

Available 13F reports, 13D and 13G stakes and each Form 3, 4 and 5 line of PRIMECAP MANAGEMENT CO/CA/ on KLAC, newest first. How the timeline and the estimate are built.

PRIMECAP MANAGEMENT CO/CA/ held 20,536,730 KLAC shares at 2026-06-30 per its 13F-HR filed 2026-08-14.

the latest 13F is the newest step

  1. period ended2026-06-30
    13F 20,536,730 shares
    Change vs previous 13F +18,099,083 shares

    3.66% of the 13F portfolio, value $6,196,136,809.

    13F-HR 0000763212-26-000028 filed by PRIMECAP MANAGEMENT CO/CA/
    Filed (acceptance time not in the bulk data set), ingested

    Acceptance time not in the bulk data set (spec §4.2).

  2. period ended2026-03-31
    13F 2,437,647 shares
    Change vs previous 13F -438,315 shares

    2.83% of the 13F portfolio, value $3,589,215,820.

    13F-HR 0000763212-26-000016 filed by PRIMECAP MANAGEMENT CO/CA/
    Filed (acceptance time not in the bulk data set), ingested

    Acceptance time not in the bulk data set (spec §4.2).

  3. period ended2025-12-31
    13F 2,875,962 shares
    Change vs previous 13F -659,220 shares

    2.65% of the 13F portfolio, value $3,494,523,909.

    13F-HR 0000763212-26-000012 filed by PRIMECAP MANAGEMENT CO/CA/
    Filed (acceptance time not in the bulk data set), ingested

    Acceptance time not in the bulk data set (spec §4.2).

  4. period ended2025-09-30
    13F 3,535,182 shares
    Change vs previous 13F -945,095 shares

    2.92% of the 13F portfolio, value $3,813,047,305.

    13F-HR 0000763212-25-000005 filed by PRIMECAP MANAGEMENT CO/CA/
    Filed (acceptance time not in the bulk data set), ingested

    Acceptance time not in the bulk data set (spec §4.2).

  5. period ended2025-06-30
    13F 4,480,277 shares
    Change vs previous 13F -396,732 shares

    3.18% of the 13F portfolio, value $4,013,163,319.

    13F-HR 0001085146-25-004804 filed by PRIMECAP MANAGEMENT CO/CA/
    Filed (acceptance time not in the bulk data set), ingested

    Acceptance time not in the bulk data set (spec §4.2).

  6. period ended2025-03-31
    13F 4,877,009 shares
    Change vs previous 13F -307,560 shares

    2.74% of the 13F portfolio, value $3,315,390,718.

    13F-HR 0001085146-25-002901 filed by PRIMECAP MANAGEMENT CO/CA/
    Filed (acceptance time not in the bulk data set), ingested

    Acceptance time not in the bulk data set (spec §4.2).

  7. period ended2024-12-31
    13F 5,184,569 shares
    Change vs previous 13F -116,950 shares

    2.53% of the 13F portfolio, value $3,266,900,619.

    13F-HR 0001085146-25-000946 filed by PRIMECAP MANAGEMENT CO/CA/
    Filed (acceptance time not in the bulk data set), ingested

    Acceptance time not in the bulk data set (spec §4.2).

  8. period ended2024-09-30
    13F 5,301,519 shares
    Change vs previous 13F not available

    3.02% of the 13F portfolio, value $4,105,549,328.

    13F-HR 0001085146-24-005460 filed by PRIMECAP MANAGEMENT CO/CA/
    Filed (acceptance time not in the bulk data set), ingested

    Acceptance time not in the bulk data set (spec §4.2).