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Disclosery

Polaris Capital Management, LLC: MKSI position timeline

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

Polaris Capital Management, LLC held 0 MKSI shares at 2026-06-30 per its 13F-HR filed 2026-07-27.

the latest 13F is the newest step

  1. period ended2026-06-30
    13F 0 shares
    Change vs previous 13F -134,700 shares

    13F-HR 0001144969-26-000005 filed by Polaris Capital Management, 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 ended2026-03-31
    13F 134,700 shares
    Change vs previous 13F -130,400 shares

    2.53% of the 13F portfolio, value $30,955,407.

    13F-HR 0001144969-26-000004 filed by Polaris Capital 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 265,100 shares
    Change vs previous 13F -136,200 shares

    3.51% of the 13F portfolio, value $42,362,980.

    13F-HR 0001144969-26-000002 filed by Polaris Capital 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 401,300 shares
    Change vs previous 13F +39,900 shares

    3.26% of the 13F portfolio, value $49,668,901.

    13F-HR 0001144969-25-000010 filed by Polaris Capital 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 361,400 shares
    Change vs previous 13F -12,200 shares

    2.39% of the 13F portfolio, value $35,908,704.

    13F-HR 0001144969-25-000005 filed by Polaris Capital 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 373,600 shares
    Change vs previous 13F +21,200 shares

    1.71% of the 13F portfolio, value $29,944,040.

    13F-HR 0001144969-25-000004 filed by Polaris Capital 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 352,400 shares
    Change vs previous 13F -1,600 shares

    1.77% of the 13F portfolio, value $36,787,036.

    13F-HR 0001144969-25-000001 filed by Polaris Capital 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 354,000 shares
    Change vs previous 13F not available

    1.9% of the 13F portfolio, value $38,483,340.

    13F-HR 0001144969-24-000011 filed by Polaris Capital Management, LLC
    Filed (acceptance time not in the bulk data set), ingested

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