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Disclosery

Sentinel Dome Partners, LLC: ECHO position timeline

Available 13F reports, 13D and 13G stakes and each Form 3, 4 and 5 line of Sentinel Dome Partners, LLC on ECHO, newest first. How the timeline and the estimate are built.

Sentinel Dome Partners, LLC held 31,500 ECHO shares at 2026-06-30 per its 13F-HR filed 2026-08-14.

the latest 13F is the newest step

  1. period ended2026-06-30
    13F 31,500 shares
    Change vs previous 13F -18,000 shares

    2.33% of the 13F portfolio, value $3,197,250.

    13F-HR 0001104659-26-096622 filed by Sentinel Dome Partners, 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 49,500 shares
    Change vs previous 13F +1,500 shares

    5.51% of the 13F portfolio, value $5,794,965.

    13F-HR 0001104659-26-061976 filed by Sentinel Dome Partners, 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 48,000 shares
    Change vs previous 13F not available

    3.55% of the 13F portfolio, value $5,217,600.

    13F-HR 0001104659-26-023987 filed by Sentinel Dome Partners, LLC
    Filed (acceptance time not in the bulk data set), ingested

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