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Disclosery

Central Securities Corp: ADI position timeline

Available 13F reports, 13D and 13G stakes and each Form 3, 4 and 5 line of Central Securities Corp on ADI, newest first. How the timeline and the estimate are built.

Central Securities Corp held 350,000 ADI shares at 2026-06-30 per its 13F-HR filed 2026-08-10.

the latest 13F is the newest step

  1. period ended2026-06-30
    13F 350,000 shares
    Change vs previous 13F 0 shares

    10.37% of the 13F portfolio, value $139,009,500.

    13F-HR 0001209992-26-000048 filed by Central Securities Corp
    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 350,000 shares
    Change vs previous 13F -10,000 shares

    9.19% of the 13F portfolio, value $111,349,000.

    13F-HR 0001209992-26-000035 filed by Central Securities Corp
    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 360,000 shares
    Change vs previous 13F 0 shares

    7.85% of the 13F portfolio, value $97,632,000.

    13F-HR 0001209992-26-000018 filed by Central Securities Corp
    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 360,000 shares
    Change vs previous 13F -10,000 shares

    7.28% of the 13F portfolio, value $88,452,000.

    13F-HR 0001209992-25-000010 filed by Central Securities Corp
    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 370,000 shares
    Change vs previous 13F -20,000 shares

    7.77% of the 13F portfolio, value $88,067,400.

    13F-HR 0000018748-25-000009 filed by Central Securities Corp
    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 390,000 shares
    Change vs previous 13F -10,000 shares

    7.48% of the 13F portfolio, value $78,651,300.

    13F-HR 0000018748-25-000002 filed by Central Securities Corp
    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 400,000 shares
    Change vs previous 13F 0 shares

    8.12% of the 13F portfolio, value $84,984,000.

    13F-HR 0001006975-25-000005 filed by Central Securities Corp
    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 400,000 shares
    Change vs previous 13F not available

    8.93% of the 13F portfolio, value $92,068,000.

    13F-HR 0000018748-24-000014 filed by Central Securities Corp
    Filed (acceptance time not in the bulk data set), ingested

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