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Disclosery

Plato Investment Management Ltd: CIEN position timeline

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

Plato Investment Management Ltd held 4,355 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 4,355 shares
    Change vs previous 13F +653 shares

    0.12% of the 13F portfolio, value $2,123,925.

    13F-HR 0001984475-26-000004 filed by Plato Investment Management Ltd
    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 3,702 shares
    Change vs previous 13F +2,436 shares

    0.1% of the 13F portfolio, value $1,438,067.

    13F-HR 0001984475-26-000003 filed by Plato Investment Management Ltd
    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 1,266 shares
    Change vs previous 13F not available

    0.02% of the 13F portfolio, value $297,523.

    13F-HR 0001984475-26-000001 filed by Plato Investment Management Ltd
    Filed (acceptance time not in the bulk data set), ingested

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