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PROSPECTOR PARTNERS LLC: MRK position timeline

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

PROSPECTOR PARTNERS LLC held 0 MRK shares at 2025-12-31 per its 13F-HR filed 2026-02-13.

the latest 13F is the newest step

  1. period ended2025-12-31
    13F 0 shares
    Change vs previous 13F -157,282 shares

    13F-HR 0001398344-26-003043 filed by PROSPECTOR PARTNERS 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.

  2. period ended2025-09-30
    13F 157,282 shares
    Change vs previous 13F -9,521 shares

    1.59% of the 13F portfolio, value $13,200,678.

    13F-HR 0001398344-25-020530 filed by PROSPECTOR PARTNERS LLC
    Filed (acceptance time not in the bulk data set), ingested

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

  3. period ended2025-06-30
    13F 166,803 shares
    Change vs previous 13F -10,499 shares

    1.53% of the 13F portfolio, value $13,204,125.

    13F-HR 0001398344-25-014823 filed by PROSPECTOR PARTNERS LLC
    Filed (acceptance time not in the bulk data set), ingested

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

  4. period ended2025-03-31
    13F 177,302 shares
    Change vs previous 13F -1,036 shares

    1.82% of the 13F portfolio, value $15,914,628.

    13F-HR 0001398344-25-009285 filed by PROSPECTOR PARTNERS LLC
    Filed (acceptance time not in the bulk data set), ingested

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

  5. period ended2024-12-31
    13F 178,338 shares
    Change vs previous 13F +15,490 shares

    2.01% of the 13F portfolio, value $17,741,064.

    13F-HR 0001398344-25-002611 filed by PROSPECTOR PARTNERS LLC
    Filed (acceptance time not in the bulk data set), ingested

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

  6. period ended2024-09-30
    13F 162,848 shares
    Change vs previous 13F +737 shares

    1.97% of the 13F portfolio, value $18,493,019.

    13F-HR 0001398344-24-020566 filed by PROSPECTOR PARTNERS LLC
    Filed (acceptance time not in the bulk data set), ingested

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

  7. period ended2024-06-30
    13F 162,111 shares
    Change vs previous 13F not available

    2.35% of the 13F portfolio, value $20,069,342.

    13F-HR 0001398344-24-014535 filed by PROSPECTOR PARTNERS LLC
    Filed (acceptance time not in the bulk data set), ingested

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