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BLAIR WILLIAM & CO/IL: REGN position timeline

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

BLAIR WILLIAM & CO/IL held 2,384 REGN 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 2,384 shares
    Change vs previous 13F +1,020 shares

    <0.01% of the 13F portfolio, value $1,486,750.

    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 1,364 shares
    Change vs previous 13F +66 shares

    <0.01% of the 13F portfolio, value $1,053,731.

    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 1,298 shares
    Change vs previous 13F +29 shares

    <0.01% of the 13F portfolio, value $1,002,253.

    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 1,269 shares
    Change vs previous 13F +12 shares

    <0.01% of the 13F portfolio, value $713,791.

    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 1,257 shares
    Change vs previous 13F -25 shares

    <0.01% of the 13F portfolio, value $660,100.

    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 1,282 shares
    Change vs previous 13F +27 shares

    <0.01% of the 13F portfolio, value $813,172.

    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 1,255 shares
    Change vs previous 13F -788 shares

    <0.01% of the 13F portfolio, value $893,827.

    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 2,043 shares
    Change vs previous 13F not available

    0.01% of the 13F portfolio, value $2,147,683.

    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).