Skip to content
Disclosery

12th Street Asset Management Company, LLC: CIEN position timeline

Available 13F reports, 13D and 13G stakes and each Form 3, 4 and 5 line of 12th Street Asset Management Company, LLC on CIEN, newest first. How the timeline and the estimate are built.

12th Street Asset Management Company, LLC held 46,777 CIEN shares at 2026-06-30 per its 13F-HR filed 2026-08-13.

the latest 13F is the newest step

  1. period ended2026-06-30
    13F 46,777 shares
    Change vs previous 13F -16,710 shares

    3.27% of the 13F portfolio, value $22,946,946.

    13F-HR 0001633703-26-000010 filed by 12th Street Asset Management Company, LLC
    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 63,487 shares
    Change vs previous 13F -116,097 shares

    4.03% of the 13F portfolio, value $24,647,574.

    13F-HR 0001633703-26-000007 filed by 12th Street Asset Management Company, 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 179,584 shares
    Change vs previous 13F -5,368 shares

    6.92% of the 13F portfolio, value $41,999,320.

    13F-HR 0001633703-26-000003 filed by 12th Street Asset Management Company, 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 184,952 shares
    Change vs previous 13F -193,156 shares

    4.56% of the 13F portfolio, value $26,942,024.

    13F-HR 0001633703-25-000013 filed by 12th Street Asset Management Company, 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 378,108 shares
    Change vs previous 13F +68,553 shares

    5.29% of the 13F portfolio, value $30,751,524.

    13F-HR 0001633703-25-000007 filed by 12th Street Asset Management Company, 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 309,555 shares
    Change vs previous 13F +422 shares

    3.19% of the 13F portfolio, value $18,706,408.

    13F-HR 0001633703-25-000005 filed by 12th Street Asset Management Company, 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 309,133 shares
    Change vs previous 13F +69,876 shares

    4.32% of the 13F portfolio, value $26,217,569.

    13F-HR 0001633703-25-000003 filed by 12th Street Asset Management Company, 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 239,257 shares
    Change vs previous 13F not available

    2.48% of the 13F portfolio, value $14,735,839.

    13F-HR 0001633703-24-000012 filed by 12th Street Asset Management Company, LLC
    Filed (acceptance time not in the bulk data set), ingested

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