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PRIMECAP MANAGEMENT CO/CA/: RYTM position timeline

Available 13F reports, 13D and 13G stakes and each Form 3, 4 and 5 line of PRIMECAP MANAGEMENT CO/CA/ on RYTM, newest first. How the timeline and the estimate are built.

PRIMECAP MANAGEMENT CO/CA/ held 3,168,853 RYTM 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 3,168,853 shares
    Change vs previous 13F -248,656 shares

    0.21% of the 13F portfolio, value $351,837,748.

    13F-HR 0000763212-26-000028 filed by PRIMECAP MANAGEMENT CO/CA/
    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 3,417,509 shares
    Change vs previous 13F -61,160 shares

    0.23% of the 13F portfolio, value $297,220,757.

    13F-HR 0000763212-26-000016 filed by PRIMECAP MANAGEMENT CO/CA/
    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 3,478,669 shares
    Change vs previous 13F -784,190 shares

    0.28% of the 13F portfolio, value $372,356,730.

    13F-HR 0000763212-26-000012 filed by PRIMECAP MANAGEMENT CO/CA/
    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 4,262,859 shares
    Change vs previous 13F -615,178 shares

    0.33% of the 13F portfolio, value $430,506,130.

    13F-HR 0000763212-25-000005 filed by PRIMECAP MANAGEMENT CO/CA/
    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 4,878,037 shares
    Change vs previous 13F -909,285 shares

    0.24% of the 13F portfolio, value $308,243,159.

    13F-HR 0001085146-25-004804 filed by PRIMECAP MANAGEMENT CO/CA/
    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 5,787,322 shares
    Change vs previous 13F -783,868 shares

    0.25% of the 13F portfolio, value $306,554,446.

    13F-HR 0001085146-25-002901 filed by PRIMECAP MANAGEMENT CO/CA/
    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 6,571,190 shares
    Change vs previous 13F -645,721 shares

    0.28% of the 13F portfolio, value $367,855,216.

    13F-HR 0001085146-25-000946 filed by PRIMECAP MANAGEMENT CO/CA/
    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 7,216,911 shares
    Change vs previous 13F not available

    0.28% of the 13F portfolio, value $378,093,967.

    13F-HR 0001085146-24-005460 filed by PRIMECAP MANAGEMENT CO/CA/
    Filed (acceptance time not in the bulk data set), ingested

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