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Shannon River Fund Management LLC: TSEM position timeline

Available 13F reports, 13D and 13G stakes and each Form 3, 4 and 5 line of Shannon River Fund Management LLC on TSEM, newest first. How the timeline and the estimate are built.

Shannon River Fund Management LLC held 382,933 TSEM 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 382,933 shares
    Change vs previous 13F -121,306 shares

    8.91% of the 13F portfolio, value $99,807,657.

    13F-HR 0001013594-26-000886 filed by Shannon River Fund Management 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 504,239 shares
    Change vs previous 13F -98,565 shares

    16.88% of the 13F portfolio, value $88,483,860.

    13F-HR 0001013594-26-000581 filed by Shannon River Fund Management 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 602,804 shares
    Change vs previous 13F -359,259 shares

    11.1% of the 13F portfolio, value $70,781,246.

    13F-HR 0001013594-26-000239 filed by Shannon River Fund Management 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 962,063 shares
    Change vs previous 13F -505,441 shares

    11.2% of the 13F portfolio, value $69,557,155.

    13F-HR 0001013594-25-001398 filed by Shannon River Fund Management 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 1,467,504 shares
    Change vs previous 13F +274,791 shares

    9.8% of the 13F portfolio, value $63,616,298.

    13F-HR 0001013594-25-000992 filed by Shannon River Fund Management 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 1,192,713 shares
    Change vs previous 13F +106,822 shares

    11.1% of the 13F portfolio, value $42,532,146.

    13F-HR 0001013594-25-000645 filed by Shannon River Fund Management 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 1,085,891 shares
    Change vs previous 13F -252,324 shares

    9.89% of the 13F portfolio, value $55,934,245.

    13F-HR 0001013594-25-000260 filed by Shannon River Fund Management 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 1,338,215 shares
    Change vs previous 13F not available

    8.95% of the 13F portfolio, value $59,229,396.

    13F-HR 0001013594-24-000941 filed by Shannon River Fund Management LLC
    Filed (acceptance time not in the bulk data set), ingested

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