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PRIMECAP MANAGEMENT CO/CA/: CIEN position timeline

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

PRIMECAP MANAGEMENT CO/CA/ held 308,050 CIEN 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 308,050 shares
    Change vs previous 13F -130,000 shares

    0.09% of the 13F portfolio, value $151,117,008.

    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 438,050 shares
    Change vs previous 13F -73,550 shares

    0.13% of the 13F portfolio, value $170,064,152.

    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 511,600 shares
    Change vs previous 13F -75,600 shares

    0.09% of the 13F portfolio, value $119,647,892.

    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 587,200 shares
    Change vs previous 13F +32,700 shares

    0.07% of the 13F portfolio, value $85,537,424.

    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 554,500 shares
    Change vs previous 13F +75,950 shares

    0.04% of the 13F portfolio, value $45,097,485.

    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 478,550 shares
    Change vs previous 13F +14,870 shares

    0.02% of the 13F portfolio, value $28,918,776.

    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 463,680 shares
    Change vs previous 13F +336,180 shares

    0.03% of the 13F portfolio, value $39,324,701.

    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 127,500 shares
    Change vs previous 13F not available

    0.01% of the 13F portfolio, value $7,852,725.

    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).