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Altai Capital Management, L.P.: OSUR position timeline

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

Altai Capital Management, L.P. held 3,613,836 OSUR 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 3,613,836 shares
    Change vs previous 13F 0 shares

    32.9% of the 13F portfolio, value $16,118,000.

    13F-HR 0001478982-26-000004 filed by Altai Capital Management, L.P.
    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 3,613,836 shares
    Change vs previous 13F -127,000 shares

    31.03% of the 13F portfolio, value $10,842,000.

    13F-HR 0001478982-26-000003 filed by Altai Capital Management, L.P.
    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 3,740,836 shares
    Change vs previous 13F -8,000 shares

    22.94% of the 13F portfolio, value $9,053,000.

    13F-HR 0001478982-26-000002 filed by Altai Capital Management, L.P.
    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 3,748,836 shares
    Change vs previous 13F +1,586,488 shares

    23.71% of the 13F portfolio, value $12,034,000.

    13F-HR 0001478982-25-000006 filed by Altai Capital Management, L.P.
    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 2,162,348 shares
    Change vs previous 13F +2,004,433 shares

    11.78% of the 13F portfolio, value $6,487,000.

    13F-HR 0001478982-25-000004 filed by Altai Capital Management, L.P.
    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 157,915 shares
    Change vs previous 13F not available

    0.92% of the 13F portfolio, value $532,000.

    13F-HR 0001478982-25-000003 filed by Altai Capital Management, L.P.
    Filed (acceptance time not in the bulk data set), ingested

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