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NEXT CENTURY GROWTH INVESTORS LLC: ATEC position timeline

Available 13F reports, 13D and 13G stakes and each Form 3, 4 and 5 line of NEXT CENTURY GROWTH INVESTORS LLC on ATEC, newest first. How the timeline and the estimate are built.

NEXT CENTURY GROWTH INVESTORS LLC held 0 ATEC 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 0 shares
    Change vs previous 13F -2,370,377 shares

    13F-HR 0001134007-26-000006 filed by NEXT CENTURY GROWTH INVESTORS LLC
    Filed (acceptance time not in the bulk data set), ingested

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

    Exited: the 13F for this period no longer lists the position.

  2. period ended2026-03-31
    13F 2,370,377 shares
    Change vs previous 13F -47,921 shares

    1.87% of the 13F portfolio, value $25,789,701.

    13F-HR 0001134007-26-000003 filed by NEXT CENTURY GROWTH INVESTORS 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 2,418,298 shares
    Change vs previous 13F +138,915 shares

    3.53% of the 13F portfolio, value $50,880,989.

    13F-HR 0001134007-26-000002 filed by NEXT CENTURY GROWTH INVESTORS 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 2,279,383 shares
    Change vs previous 13F +218,648 shares

    2.42% of the 13F portfolio, value $33,142,228.

    13F-HR 0001134007-25-000012 filed by NEXT CENTURY GROWTH INVESTORS LLC
    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 2,060,735 shares
    Change vs previous 13F +382,057 shares

    1.77% of the 13F portfolio, value $22,874,158.

    13F-HR 0001134007-25-000009 filed by NEXT CENTURY GROWTH INVESTORS LLC
    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 1,678,678 shares
    Change vs previous 13F +696,585 shares

    1.51% of the 13F portfolio, value $17,021,794.

    13F-HR 0001134007-25-000007 filed by NEXT CENTURY GROWTH INVESTORS LLC
    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 982,093 shares
    Change vs previous 13F +23,061 shares

    0.68% of the 13F portfolio, value $9,015,613.

    13F-HR 0001134007-25-000002 filed by NEXT CENTURY GROWTH INVESTORS LLC
    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 959,032 shares
    Change vs previous 13F not available

    0.43% of the 13F portfolio, value $5,332,217.

    13F-HR 0001134007-24-000008 filed by NEXT CENTURY GROWTH INVESTORS LLC
    Filed (acceptance time not in the bulk data set), ingested

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