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ARDSLEY ADVISORY PARTNERS LP: WMB position timeline

Available 13F reports, 13D and 13G stakes and each Form 3, 4 and 5 line of ARDSLEY ADVISORY PARTNERS LP on WMB, newest first. How the timeline and the estimate are built.

ARDSLEY ADVISORY PARTNERS LP held 50,000 WMB shares at 2026-06-30 per its 13F-HR filed 2026-07-13.

the latest 13F is the newest step

  1. period ended2026-06-30
    13F 50,000 shares
    Change vs previous 13F 0 shares

    0.4% of the 13F portfolio, value $3,717,000.

    13F-HR 0001172661-26-002590 filed by ARDSLEY ADVISORY PARTNERS 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 50,000 shares
    Change vs previous 13F 0 shares

    0.55% of the 13F portfolio, value $3,639,000.

    13F-HR 0001172661-26-002039 filed by ARDSLEY ADVISORY PARTNERS 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 50,000 shares
    Change vs previous 13F -25,000 shares

    0.38% of the 13F portfolio, value $3,005,500.

    13F-HR 0001172661-26-000864 filed by ARDSLEY ADVISORY PARTNERS 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 75,000 shares
    Change vs previous 13F not available

    0.73% of the 13F portfolio, value $4,751,250.

    13F-HR 0001172661-25-004897 filed by ARDSLEY ADVISORY PARTNERS LP
    Filed (acceptance time not in the bulk data set), ingested

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