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Disclosery

Round Rock Advisors LLC: SDSI position timeline

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

Round Rock Advisors LLC held 324,038 SDSI shares at 2026-06-30 per its 13F-HR filed 2026-08-12.

the latest 13F is the newest step

  1. period ended2026-06-30
    13F 324,038 shares
    Change vs previous 13F +36,516 shares

    2.14% of the 13F portfolio, value $16,639,351.

    13F-HR 0001951757-26-001257 filed by Round Rock Advisors 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 287,522 shares
    Change vs previous 13F +49,629 shares

    2.26% of the 13F portfolio, value $14,746,716.

    13F-HR 0001951757-26-000878 filed by Round Rock Advisors 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/A 237,893 shares
    Change vs previous 13F +70,614 shares

    1.85% of the 13F portfolio, value $12,270,521.

    13F-HR/A 0001951757-26-000520 filed by Round Rock Advisors 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 167,279 shares
    Change vs previous 13F not available

    1.37% of the 13F portfolio, value $8,649,161.

    13F-HR 0001951757-25-001443 filed by Round Rock Advisors LLC
    Filed (acceptance time not in the bulk data set), ingested

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