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Disclosery

Cornerstone Investment Partners, LLC: CIEN position timeline

Available 13F reports, 13D and 13G stakes and each Form 3, 4 and 5 line of Cornerstone Investment Partners, LLC on CIEN, newest first. How the timeline and the estimate are built.

Cornerstone Investment Partners, LLC held 0 CIEN shares at 2026-06-30 per its 13F-HR filed 2026-08-07.

the latest 13F is the newest step

  1. period ended2026-06-30
    13F 0 shares
    Change vs previous 13F -5,239 shares

    13F-HR 0001328062-26-000004 filed by Cornerstone Investment Partners, LLC
    Filed (acceptance time not in the bulk data set), ingested

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

    Exited: the 13F for this period no longer lists the position.

  2. period ended2026-03-31
    13F 5,239 shares
    Change vs previous 13F -974 shares

    0.09% of the 13F portfolio, value $2,033,937.

    13F-HR 0001328062-26-000003 filed by Cornerstone Investment Partners, 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 6,213 shares
    Change vs previous 13F -106 shares

    0.06% of the 13F portfolio, value $1,453,034.

    13F-HR 0001328062-26-000002 filed by Cornerstone Investment Partners, 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 6,319 shares
    Change vs previous 13F -2,885 shares

    0.04% of the 13F portfolio, value $920,489.

    13F-HR 0001328062-25-000008 filed by Cornerstone Investment Partners, 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 9,204 shares
    Change vs previous 13F -101 shares

    0.03% of the 13F portfolio, value $748,561.

    13F-HR 0001328062-25-000005 filed by Cornerstone Investment Partners, 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 9,305 shares
    Change vs previous 13F -3,668 shares

    0.03% of the 13F portfolio, value $562,301.

    13F-HR 0001328062-25-000003 filed by Cornerstone Investment Partners, 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 12,973 shares
    Change vs previous 13F +597 shares

    0.05% of the 13F portfolio, value $1,100,240.

    13F-HR 0001328062-25-000002 filed by Cornerstone Investment Partners, 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 12,376 shares
    Change vs previous 13F not available

    0.04% of the 13F portfolio, value $762,238.

    13F-HR 0001328062-24-000009 filed by Cornerstone Investment Partners, LLC
    Filed (acceptance time not in the bulk data set), ingested

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