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Disclosery

WOODSTOCK CORP: BRK-B position timeline

Available 13F reports, 13D and 13G stakes and each Form 3, 4 and 5 line of WOODSTOCK CORP on BRK-B, newest first. How the timeline and the estimate are built.

WOODSTOCK CORP held 22,103 BRK-B shares at 2026-09-30 per its 13F-HR filed 2026-10-13.

the latest 13F is the newest step

  1. period ended2026-09-30
    13F 22,103 shares
    Change vs previous 13F +112 shares

    0.88% of the 13F portfolio, value $11,006,189.

    13F-HR 0001062993-26-005277 filed by WOODSTOCK CORP
    Accepted , ingested

  2. period ended2026-06-30
    13F 21,991 shares
    Change vs previous 13F +514 shares

    0.91% of the 13F portfolio, value $11,004,076.

    13F-HR 0001062993-26-003617 filed by WOODSTOCK CORP
    Filed (acceptance time not in the bulk data set), ingested

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

  3. period ended2026-03-31
    13F 21,477 shares
    Change vs previous 13F +540 shares

    0.92% of the 13F portfolio, value $10,291,778.

    13F-HR 0001062993-26-001892 filed by WOODSTOCK CORP
    Filed (acceptance time not in the bulk data set), ingested

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

  4. period ended2025-12-31
    13F 20,937 shares
    Change vs previous 13F +460 shares

    0.9% of the 13F portfolio, value $10,523,983.

    13F-HR 0001062993-26-000252 filed by WOODSTOCK CORP
    Filed (acceptance time not in the bulk data set), ingested

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

  5. period ended2025-09-30
    13F 20,477 shares
    Change vs previous 13F -225 shares

    0.89% of the 13F portfolio, value $10,294,607.

    13F-HR 0001062993-25-015968 filed by WOODSTOCK CORP
    Filed (acceptance time not in the bulk data set), ingested

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

  6. period ended2025-06-30
    13F 20,702 shares
    Change vs previous 13F -9 shares

    0.92% of the 13F portfolio, value $10,056,411.

    13F-HR 0001062993-25-012644 filed by WOODSTOCK CORP
    Filed (acceptance time not in the bulk data set), ingested

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

  7. period ended2025-03-31
    13F 20,711 shares
    Change vs previous 13F +514 shares

    1.09% of the 13F portfolio, value $11,030,264.

    13F-HR 0001062993-25-007257 filed by WOODSTOCK CORP
    Filed (acceptance time not in the bulk data set), ingested

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

  8. period ended2024-12-31
    13F 20,197 shares
    Change vs previous 13F not available

    0.88% of the 13F portfolio, value $9,154,896.

    13F-HR 0001062993-25-000788 filed by WOODSTOCK CORP
    Filed (acceptance time not in the bulk data set), ingested

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