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PLATINUM INVESTMENT MANAGEMENT LTD: BIRK position timeline

Available 13F reports, 13D and 13G stakes and each Form 3, 4 and 5 line of PLATINUM INVESTMENT MANAGEMENT LTD on BIRK, newest first. How the timeline and the estimate are built.

PLATINUM INVESTMENT MANAGEMENT LTD held 210,000 BIRK 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 210,000 shares
    Change vs previous 13F -65,000 shares

    2.22% of the 13F portfolio, value $9,036,300.

    13F-HR 0001256071-26-000007 filed by PLATINUM INVESTMENT MANAGEMENT LTD
    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 275,000 shares
    Change vs previous 13F +27,400 shares

    2.48% of the 13F portfolio, value $9,853,250.

    13F-HR 0001256071-26-000005 filed by PLATINUM INVESTMENT MANAGEMENT LTD
    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 247,600 shares
    Change vs previous 13F -12,400 shares

    2.34% of the 13F portfolio, value $10,126,840.

    13F-HR 0001256071-26-000004 filed by PLATINUM INVESTMENT MANAGEMENT LTD
    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 260,000 shares
    Change vs previous 13F +140,000 shares

    0.76% of the 13F portfolio, value $11,765,000.

    13F-HR 0001256071-25-000009 filed by PLATINUM INVESTMENT MANAGEMENT LTD
    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 120,000 shares
    Change vs previous 13F 0 shares

    0.39% of the 13F portfolio, value $5,901,600.

    13F-HR 0001085146-25-003979 filed by PLATINUM INVESTMENT MANAGEMENT LTD
    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 120,000 shares
    Change vs previous 13F +30,000 shares

    0.32% of the 13F portfolio, value $5,502,000.

    13F-HR 0001085146-25-003294 filed by PLATINUM INVESTMENT MANAGEMENT LTD
    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 90,000 shares
    Change vs previous 13F 0 shares

    0.3% of the 13F portfolio, value $5,099,400.

    13F-HR 0001085146-25-000949 filed by PLATINUM INVESTMENT MANAGEMENT LTD
    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 90,000 shares
    Change vs previous 13F not available

    0.2% of the 13F portfolio, value $4,436,100.

    13F-HR 0001085146-24-005448 filed by PLATINUM INVESTMENT MANAGEMENT LTD
    Filed (acceptance time not in the bulk data set), ingested

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