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SEI INVESTMENTS CO: RBBN position timeline

Available 13F reports, 13D and 13G stakes and each Form 3, 4 and 5 line of SEI INVESTMENTS CO on RBBN, newest first. How the timeline and the estimate are built.

SEI INVESTMENTS CO held 78,348 RBBN 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 78,348 shares
    Change vs previous 13F -3,358 shares

    <0.01% of the 13F portfolio, value $183,333.

    13F-HR 0002048251-26-006553 filed by SEI INVESTMENTS CO
    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 81,706 shares
    Change vs previous 13F -58,341 shares

    <0.01% of the 13F portfolio, value $173,244.

    13F-HR 0002048251-26-003739 filed by SEI INVESTMENTS CO
    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 140,047 shares
    Change vs previous 13F +43,775 shares

    <0.01% of the 13F portfolio, value $403,371.

    13F-HR 0000350894-26-000005 filed by SEI INVESTMENTS CO
    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 96,272 shares
    Change vs previous 13F +1,517 shares

    <0.01% of the 13F portfolio, value $365,801.

    13F-HR 0002048251-25-002343 filed by SEI INVESTMENTS CO
    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 94,755 shares
    Change vs previous 13F -1,215 shares

    <0.01% of the 13F portfolio, value $379,981.

    13F-HR 0001041062-25-000162 filed by SEI INVESTMENTS CO
    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/A 95,970 shares
    Change vs previous 13F +15,880 shares

    <0.01% of the 13F portfolio, value $376,200.

    13F-HR/A 0001041062-25-000106 filed by SEI INVESTMENTS CO
    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 80,090 shares
    Change vs previous 13F -277 shares

    <0.01% of the 13F portfolio, value $333,136.

    13F-HR 0001041062-25-000019 filed by SEI INVESTMENTS CO
    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 80,367 shares
    Change vs previous 13F not available

    <0.01% of the 13F portfolio, value $261,205.

    13F-HR 0001041062-24-000165 filed by SEI INVESTMENTS CO
    Filed (acceptance time not in the bulk data set), ingested

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