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WELLINGTON MANAGEMENT GROUP LLP: AMPL position timeline

Available 13F reports, 13D and 13G stakes and each Form 3, 4 and 5 line of WELLINGTON MANAGEMENT GROUP LLP on AMPL, newest first. How the timeline and the estimate are built.

WELLINGTON MANAGEMENT GROUP LLP held 11,086,006 AMPL 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 11,086,006 shares
    Change vs previous 13F -68,550 shares

    0.01% of the 13F portfolio, value $84,807,946.

    13F-HR 0000902219-26-000311 filed by WELLINGTON MANAGEMENT GROUP LLP
    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 11,154,556 shares
    Change vs previous 13F +9,190,506 shares

    0.01% of the 13F portfolio, value $76,074,071.

    13F-HR 0000902219-26-000209 filed by WELLINGTON MANAGEMENT GROUP LLP
    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 1,964,050 shares
    Change vs previous 13F -62,548 shares

    <0.01% of the 13F portfolio, value $22,743,699.

    13F-HR 0000902219-26-000103 filed by WELLINGTON MANAGEMENT GROUP LLP
    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 2,026,598 shares
    Change vs previous 13F +1,797,228 shares

    <0.01% of the 13F portfolio, value $21,725,130.

    13F-HR 0000902219-25-000462 filed by WELLINGTON MANAGEMENT GROUP LLP
    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 229,370 shares
    Change vs previous 13F not available

    <0.01% of the 13F portfolio, value $2,844,188.

    13F-HR 0000902219-25-000356 filed by WELLINGTON MANAGEMENT GROUP LLP
    Filed (acceptance time not in the bulk data set), ingested

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