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Disclosery

BLAIR WILLIAM & CO/IL: GLW position timeline

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

BLAIR WILLIAM & CO/IL held 257,541 GLW 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 257,541 shares
    Change vs previous 13F -33,599 shares

    0.17% of the 13F portfolio, value $65,783,657.

    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 291,140 shares
    Change vs previous 13F -18,715 shares

    0.11% of the 13F portfolio, value $39,586,346.

    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 309,855 shares
    Change vs previous 13F +34,713 shares

    0.07% of the 13F portfolio, value $27,130,930.

    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 275,142 shares
    Change vs previous 13F -11,078 shares

    0.06% of the 13F portfolio, value $22,569,922.

    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 286,220 shares
    Change vs previous 13F -17,197 shares

    0.04% of the 13F portfolio, value $15,052,302.

    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 303,417 shares
    Change vs previous 13F +40,904 shares

    0.04% of the 13F portfolio, value $13,890,409.

    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 262,513 shares
    Change vs previous 13F +41,144 shares

    0.04% of the 13F portfolio, value $12,474,594.

    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 221,369 shares
    Change vs previous 13F not available

    0.03% of the 13F portfolio, value $9,994,796.

    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).