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Disclosery

SFE Investment Counsel: GLW position timeline

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

SFE Investment Counsel held 18,709 GLW shares at 2026-06-30 per its 13F-HR filed 2026-08-05.

the latest 13F is the newest step

  1. period ended2026-06-30
    13F 18,709 shares
    Change vs previous 13F -3,477 shares

    0.66% of the 13F portfolio, value $4,778,840.

    13F-HR 0001317784-26-000003 filed by SFE Investment Counsel
    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 22,186 shares
    Change vs previous 13F -1,975 shares

    0.48% of the 13F portfolio, value $3,016,630.

    13F-HR 0001317784-26-000002 filed by SFE Investment Counsel
    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 24,161 shares
    Change vs previous 13F -2,963 shares

    0.33% of the 13F portfolio, value $2,115,537.

    13F-HR 0001317784-26-000001 filed by SFE Investment Counsel
    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 27,124 shares
    Change vs previous 13F +1,035 shares

    0.36% of the 13F portfolio, value $2,224,982.

    13F-HR 0001317784-25-000003 filed by SFE Investment Counsel
    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 26,089 shares
    Change vs previous 13F +1,413 shares

    0.24% of the 13F portfolio, value $1,372,021.

    13F-HR 0001085146-25-004662 filed by SFE Investment Counsel
    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 24,676 shares
    Change vs previous 13F -150 shares

    0.23% of the 13F portfolio, value $1,129,667.

    13F-HR 0001085146-25-002652 filed by SFE Investment Counsel
    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 24,826 shares
    Change vs previous 13F +470 shares

    0.25% of the 13F portfolio, value $1,179,732.

    13F-HR 0001085146-25-000626 filed by SFE Investment Counsel
    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 24,356 shares
    Change vs previous 13F not available

    0.23% of the 13F portfolio, value $1,099,673.

    13F-HR 0001085146-24-005141 filed by SFE Investment Counsel
    Filed (acceptance time not in the bulk data set), ingested

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