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ESSEX INVESTMENT MANAGEMENT CO LLC: RAIL position timeline

Available 13F reports, 13D and 13G stakes and each Form 3, 4 and 5 line of ESSEX INVESTMENT MANAGEMENT CO LLC on RAIL, newest first. How the timeline and the estimate are built.

ESSEX INVESTMENT MANAGEMENT CO LLC held 337,662 RAIL 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 337,662 shares
    Change vs previous 13F -14,681 shares

    0.43% of the 13F portfolio, value $3,288,828.

    13F-HR 0000201772-26-000005 filed by ESSEX INVESTMENT MANAGEMENT CO 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 352,343 shares
    Change vs previous 13F +6,199 shares

    0.44% of the 13F portfolio, value $2,808,174.

    13F-HR 0000201772-26-000004 filed by ESSEX INVESTMENT MANAGEMENT CO 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 346,144 shares
    Change vs previous 13F +140,946 shares

    0.58% of the 13F portfolio, value $3,831,814.

    13F-HR 0000201772-26-000001 filed by ESSEX INVESTMENT MANAGEMENT CO 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 205,198 shares
    Change vs previous 13F not available

    0.31% of the 13F portfolio, value $2,006,836.

    13F-HR 0000201772-25-000008 filed by ESSEX INVESTMENT MANAGEMENT CO LLC
    Filed (acceptance time not in the bulk data set), ingested

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