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Disclosery

S&CO INC: RBRK position timeline

Available 13F reports, 13D and 13G stakes and each Form 3, 4 and 5 line of S&CO INC on RBRK, newest first. How the timeline and the estimate are built.

S&CO INC held 53,612 RBRK shares at 2026-06-30 per its 13F-HR filed 2026-08-06.

the latest 13F is the newest step

  1. period ended2026-06-30
    13F 53,612 shares
    Change vs previous 13F 0 shares

    0.25% of the 13F portfolio, value $4,303,000.

    13F-HR 0001082461-26-000003 filed by S&CO INC
    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 53,612 shares
    Change vs previous 13F 0 shares

    0.16% of the 13F portfolio, value $2,625,000.

    13F-HR 0001082461-26-000002 filed by S&CO INC
    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 53,612 shares
    Change vs previous 13F 0 shares

    0.25% of the 13F portfolio, value $4,100,000.

    13F-HR 0001082461-26-000001 filed by S&CO INC
    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 53,612 shares
    Change vs previous 13F +27,179 shares

    0.27% of the 13F portfolio, value $4,409,000.

    13F-HR 0001082461-25-000005 filed by S&CO INC
    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 26,433 shares
    Change vs previous 13F +13,224 shares

    0.15% of the 13F portfolio, value $2,368,000.

    13F-HR 0001082461-25-000003 filed by S&CO INC
    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 13,209 shares
    Change vs previous 13F not available

    0.05% of the 13F portfolio, value $805,000.

    13F-HR 0001082461-25-000002 filed by S&CO INC
    Filed (acceptance time not in the bulk data set), ingested

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