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RUSH ISLAND MANAGEMENT, LP: ESS position timeline

Available 13F reports, 13D and 13G stakes and each Form 3, 4 and 5 line of RUSH ISLAND MANAGEMENT, LP on ESS, newest first. How the timeline and the estimate are built.

RUSH ISLAND MANAGEMENT, LP held 438,518 ESS 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 438,518 shares
    Change vs previous 13F -369,375 shares

    8.47% of the 13F portfolio, value $127,867,464.

    13F-HR 0001214659-26-010384 filed by RUSH ISLAND MANAGEMENT, LP
    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 807,893 shares
    Change vs previous 13F +170,682 shares

    13.12% of the 13F portfolio, value $195,510,106.

    13F-HR 0001214659-26-006469 filed by RUSH ISLAND MANAGEMENT, LP
    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 637,211 shares
    Change vs previous 13F +43,103 shares

    10.42% of the 13F portfolio, value $166,745,374.

    13F-HR 0001214659-26-001981 filed by RUSH ISLAND MANAGEMENT, LP
    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 594,108 shares
    Change vs previous 13F not available

    10.9% of the 13F portfolio, value $159,018,947.

    13F-HR 0001214659-25-016635 filed by RUSH ISLAND MANAGEMENT, LP
    Filed (acceptance time not in the bulk data set), ingested

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