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BEACONLIGHT CAPITAL, LLC: TNDM position timeline

Available 13F reports, 13D and 13G stakes and each Form 3, 4 and 5 line of BEACONLIGHT CAPITAL, LLC on TNDM, newest first. How the timeline and the estimate are built.

BEACONLIGHT CAPITAL, LLC held 266,009 TNDM 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 266,009 shares
    Change vs previous 13F +12,132 shares

    1.77% of the 13F portfolio, value $4,014,076.

    13F-HR 0000919574-26-005460 filed by BEACONLIGHT CAPITAL, 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 253,877 shares
    Change vs previous 13F +253,877 shares

    2.74% of the 13F portfolio, value $4,866,822.

    13F-HR 0000919574-26-003095 filed by BEACONLIGHT CAPITAL, LLC
    Filed (acceptance time not in the bulk data set), ingested

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

  3. period ended2025-09-30
    13F 0 shares
    Change vs previous 13F -53,455 shares

    13F-HR 0000919574-25-006888 filed by BEACONLIGHT CAPITAL, 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.

  4. period ended2025-06-30
    13F 53,455 shares
    Change vs previous 13F -166,302 shares

    0.58% of the 13F portfolio, value $996,401.

    13F-HR 0000919574-25-004668 filed by BEACONLIGHT CAPITAL, LLC
    Filed (acceptance time not in the bulk data set), ingested

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

  5. period ended2025-03-31
    13F 219,757 shares
    Change vs previous 13F -111,452 shares

    2.88% of the 13F portfolio, value $4,210,544.

    13F-HR 0000919574-25-003074 filed by BEACONLIGHT CAPITAL, LLC
    Filed (acceptance time not in the bulk data set), ingested

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

  6. period ended2024-12-31
    13F 331,209 shares
    Change vs previous 13F +115,594 shares

    4.77% of the 13F portfolio, value $11,930,148.

    13F-HR 0000919574-25-001173 filed by BEACONLIGHT CAPITAL, LLC
    Filed (acceptance time not in the bulk data set), ingested

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

  7. period ended2024-09-30
    13F 215,615 shares
    Change vs previous 13F not available

    3.76% of the 13F portfolio, value $9,144,232.

    13F-HR 0000919574-24-006424 filed by BEACONLIGHT CAPITAL, LLC
    Filed (acceptance time not in the bulk data set), ingested

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