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ARDSLEY ADVISORY PARTNERS LP: ALDX position timeline

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

ARDSLEY ADVISORY PARTNERS LP held 975,000 ALDX 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 975,000 shares
    Change vs previous 13F +25,000 shares

    0.23% of the 13F portfolio, value $2,076,750.

    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 950,000 shares
    Change vs previous 13F -500,000 shares

    0.24% of the 13F portfolio, value $1,605,500.

    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 1,450,000 shares
    Change vs previous 13F -450,000 shares

    0.96% of the 13F portfolio, value $7,511,000.

    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 1,900,000 shares
    Change vs previous 13F -150,000 shares

    1.52% of the 13F portfolio, value $9,918,000.

    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).

  5. period ended2025-06-30
    13F 2,050,000 shares
    Change vs previous 13F +300,000 shares

    1.28% of the 13F portfolio, value $7,851,500.

    13F-HR 0001172661-25-003308 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).

  6. period ended2025-03-31
    13F 1,750,000 shares
    Change vs previous 13F +600,000 shares

    2.29% of the 13F portfolio, value $9,888,200.

    13F-HR 0001172661-25-002033 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).

  7. period ended2024-12-31
    13F 1,150,000 shares
    Change vs previous 13F +650,000 shares

    1.11% of the 13F portfolio, value $5,738,500.

    13F-HR 0001172661-25-000980 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).

  8. period ended2024-09-30
    13F 500,000 shares
    Change vs previous 13F not available

    0.51% of the 13F portfolio, value $2,695,000.

    13F-HR 0001172661-24-004816 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).