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Disclosery

SIRIOS CAPITAL MANAGEMENT L P: ONTO position timeline

Available 13F reports, 13D and 13G stakes and each Form 3, 4 and 5 line of SIRIOS CAPITAL MANAGEMENT L P on ONTO, newest first. How the timeline and the estimate are built.

SIRIOS CAPITAL MANAGEMENT L P held 52,585 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 52,585 shares
    Change vs previous 13F -101,350 shares

    2.42% of the 13F portfolio, value $19,900,793.

    13F-HR 0001104883-26-000008 filed by SIRIOS CAPITAL MANAGEMENT L P
    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 153,935 shares
    Change vs previous 13F +38,580 shares

    3.83% of the 13F portfolio, value $31,567,450.

    13F-HR 0001104883-26-000005 filed by SIRIOS CAPITAL MANAGEMENT L P
    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 115,355 shares
    Change vs previous 13F -47,872 shares

    2.27% of the 13F portfolio, value $18,209,940.

    13F-HR 0001104883-26-000003 filed by SIRIOS CAPITAL MANAGEMENT L P
    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 163,227 shares
    Change vs previous 13F not available

    2.75% of the 13F portfolio, value $21,092,193.

    13F-HR 0001104883-25-000015 filed by SIRIOS CAPITAL MANAGEMENT L P
    Filed (acceptance time not in the bulk data set), ingested

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