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Birch Hill Investment Advisors LLC: WST position timeline

Available 13F reports, 13D and 13G stakes and each Form 3, 4 and 5 line of Birch Hill Investment Advisors LLC on WST, newest first. How the timeline and the estimate are built.

Birch Hill Investment Advisors LLC held 159,696 WST shares at 2026-06-30 per its 13F-HR filed 2026-07-21.

the latest 13F is the newest step

  1. period ended2026-06-30
    13F 159,696 shares
    Change vs previous 13F -1,463 shares

    2.32% of the 13F portfolio, value $57,330,864.

    13F-HR 0001172661-26-002717 filed by Birch Hill Investment Advisors 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 161,159 shares
    Change vs previous 13F +9,011 shares

    1.81% of the 13F portfolio, value $40,392,892.

    13F-HR 0001172661-26-001564 filed by Birch Hill Investment Advisors 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 152,148 shares
    Change vs previous 13F +15,678 shares

    1.75% of the 13F portfolio, value $41,862,001.

    13F-HR 0001172661-26-000323 filed by Birch Hill Investment Advisors 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 136,470 shares
    Change vs previous 13F +63,638 shares

    1.51% of the 13F portfolio, value $35,800,175.

    13F-HR 0001172661-25-004406 filed by Birch Hill Investment Advisors 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 72,832 shares
    Change vs previous 13F not available

    0.71% of the 13F portfolio, value $15,935,642.

    13F-HR 0001172661-25-002792 filed by Birch Hill Investment Advisors LLC
    Filed (acceptance time not in the bulk data set), ingested

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