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Robeco Institutional Asset Management B.V.: CIEN position timeline

Available 13F reports, 13D and 13G stakes and each Form 3, 4 and 5 line of Robeco Institutional Asset Management B.V. on CIEN, newest first. How the timeline and the estimate are built.

Robeco Institutional Asset Management B.V. held 319,285 CIEN shares at 2026-06-30 per its 13F-HR filed 2026-07-21.

the latest 13F is the newest step

  1. period ended2026-06-30
    13F 319,285 shares
    Change vs previous 13F +51,342 shares

    0.19% of the 13F portfolio, value $156,628,447.

    13F-HR 0001418773-26-000003 filed by Robeco Institutional Asset Management B.V.
    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 267,943 shares
    Change vs previous 13F +215,770 shares

    0.15% of the 13F portfolio, value $104,023,514.

    13F-HR 0001418773-26-000002 filed by Robeco Institutional Asset Management B.V.
    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 52,173 shares
    Change vs previous 13F +50,687 shares

    0.02% of the 13F portfolio, value $12,201,701.

    13F-HR 0001418773-26-000001 filed by Robeco Institutional Asset Management B.V.
    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 1,486 shares
    Change vs previous 13F -40,811 shares

    <0.01% of the 13F portfolio, value $216,466.

    13F-HR 0001418773-25-000002 filed by Robeco Institutional Asset Management B.V.
    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 42,297 shares
    Change vs previous 13F 0 shares

    0.01% of the 13F portfolio, value $3,440,015.

    13F-HR 0001085146-25-003972 filed by Robeco Institutional Asset Management B.V.
    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 42,297 shares
    Change vs previous 13F 0 shares

    <0.01% of the 13F portfolio, value $2,556,008.

    13F-HR 0001085146-25-002276 filed by Robeco Institutional Asset Management B.V.
    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 42,297 shares
    Change vs previous 13F 0 shares

    0.01% of the 13F portfolio, value $3,587,209.

    13F-HR 0001085146-25-000410 filed by Robeco Institutional Asset Management B.V.
    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 42,297 shares
    Change vs previous 13F not available

    0.01% of the 13F portfolio, value $2,605,072.

    13F-HR 0001085146-24-005220 filed by Robeco Institutional Asset Management B.V.
    Filed (acceptance time not in the bulk data set), ingested

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