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DF DENT & CO INC: ONTO position timeline

Available 13F reports, 13D and 13G stakes and each Form 3, 4 and 5 line of DF DENT & CO INC on ONTO, newest first. How the timeline and the estimate are built.

DF DENT & CO INC held 93,905 ONTO 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 93,905 shares
    Change vs previous 13F +324 shares

    0.67% of the 13F portfolio, value $35,538,294.

    13F-HR 0000934999-26-000003 filed by DF DENT & CO INC
    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 93,581 shares
    Change vs previous 13F -27,964 shares

    0.37% of the 13F portfolio, value $19,190,721.

    13F-HR 0000934999-26-000002 filed by DF DENT & CO INC
    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 121,545 shares
    Change vs previous 13F +41,122 shares

    0.28% of the 13F portfolio, value $19,187,154.

    13F-HR 0000934999-26-000001 filed by DF DENT & CO INC
    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 80,423 shares
    Change vs previous 13F not available

    0.13% of the 13F portfolio, value $10,392,314.

    13F-HR 0000934999-25-000008 filed by DF DENT & CO INC
    Filed (acceptance time not in the bulk data set), ingested

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