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Disclosery

PARTHENON LLC: GLW position timeline

Available 13F reports, 13D and 13G stakes and each Form 3, 4 and 5 line of PARTHENON LLC on GLW, newest first. How the timeline and the estimate are built.

PARTHENON LLC held 228,865 GLW shares at 2026-06-30 per its 13F-HR filed 2026-07-23.

the latest 13F is the newest step

  1. period ended2026-06-30
    13F 228,865 shares
    Change vs previous 13F -1,750 shares

    6.08% of the 13F portfolio, value $58,458,987.

    13F-HR 0001088859-26-000004 filed by PARTHENON LLC
    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 230,615 shares
    Change vs previous 13F -35 shares

    3.58% of the 13F portfolio, value $31,356,722.

    13F-HR 0001088859-26-000002 filed by PARTHENON LLC
    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 230,650 shares
    Change vs previous 13F -1,993 shares

    2.18% of the 13F portfolio, value $20,195,714.

    13F-HR 0001088859-26-000001 filed by PARTHENON LLC
    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 232,643 shares
    Change vs previous 13F -10,932 shares

    2.11% of the 13F portfolio, value $19,083,705.

    13F-HR 0001088859-25-000003 filed by PARTHENON LLC
    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 243,575 shares
    Change vs previous 13F -1,500 shares

    1.47% of the 13F portfolio, value $12,809,609.

    13F-HR 0001085146-25-004248 filed by PARTHENON LLC
    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 245,075 shares
    Change vs previous 13F -1,504 shares

    1.38% of the 13F portfolio, value $11,219,533.

    13F-HR 0001085146-25-002554 filed by PARTHENON LLC
    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 246,579 shares
    Change vs previous 13F -6,825 shares

    1.42% of the 13F portfolio, value $11,717,434.

    13F-HR 0001085146-25-000674 filed by PARTHENON LLC
    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 253,404 shares
    Change vs previous 13F not available

    1.37% of the 13F portfolio, value $11,441,191.

    13F-HR 0001085146-24-005366 filed by PARTHENON LLC
    Filed (acceptance time not in the bulk data set), ingested

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