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BLAIR WILLIAM & CO/IL: RKLB position timeline

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

BLAIR WILLIAM & CO/IL held 193,301 RKLB 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 193,301 shares
    Change vs previous 13F -8,260 shares

    0.05% of the 13F portfolio, value $19,649,084.

    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 201,561 shares
    Change vs previous 13F +8,092 shares

    0.04% of the 13F portfolio, value $12,944,227.

    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 193,469 shares
    Change vs previous 13F -6,849 shares

    0.04% of the 13F portfolio, value $13,496,397.

    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 200,318 shares
    Change vs previous 13F -2,454 shares

    0.03% of the 13F portfolio, value $9,597,235.

    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 202,772 shares
    Change vs previous 13F not available

    0.02% of the 13F portfolio, value $7,253,154.

    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).