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BLAIR WILLIAM & CO/IL: KLAC position timeline

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

BLAIR WILLIAM & CO/IL held 288,392 KLAC shares at 2026-06-30 per its 13F-HR filed 2026-08-11.

the latest 13F is the newest step

  1. period ended2026-06-30
    13F 288,392 shares
    Change vs previous 13F +256,312 shares

    0.23% of the 13F portfolio, value $87,010,605.

    13F-HR 0001104659-26-093821 filed by BLAIR WILLIAM & CO/IL
    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 32,080 shares
    Change vs previous 13F +226 shares

    0.14% of the 13F portfolio, value $47,234,807.

    13F-HR 0001104659-26-057897 filed by BLAIR WILLIAM & CO/IL
    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 31,854 shares
    Change vs previous 13F +584 shares

    0.1% of the 13F portfolio, value $38,705,620.

    13F-HR 0001104659-26-015563 filed by BLAIR WILLIAM & CO/IL
    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 31,270 shares
    Change vs previous 13F -269 shares

    0.09% of the 13F portfolio, value $33,727,947.

    13F-HR 0001104659-25-109927 filed by BLAIR WILLIAM & CO/IL
    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 31,539 shares
    Change vs previous 13F +581 shares

    0.08% of the 13F portfolio, value $28,250,496.

    13F-HR 0001104659-25-070274 filed by BLAIR WILLIAM & CO/IL
    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 30,958 shares
    Change vs previous 13F -252 shares

    0.06% of the 13F portfolio, value $21,045,214.

    13F-HR 0001104659-25-046545 filed by BLAIR WILLIAM & CO/IL
    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 31,210 shares
    Change vs previous 13F +186 shares

    0.06% of the 13F portfolio, value $19,666,180.

    13F-HR 0001104659-25-011872 filed by BLAIR WILLIAM & CO/IL
    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 31,024 shares
    Change vs previous 13F not available

    0.07% of the 13F portfolio, value $24,025,665.

    13F-HR 0001104659-24-116499 filed by BLAIR WILLIAM & CO/IL
    Filed (acceptance time not in the bulk data set), ingested

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