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Disclosery

Western Standard LLC: IOSP position timeline

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

Western Standard LLC held 236,833 IOSP shares at 2026-06-30 per its 13F-HR filed 2026-08-10.

the latest 13F is the newest step

  1. period ended2026-06-30
    13F 236,833 shares
    Change vs previous 13F +10,000 shares

    6.53% of the 13F portfolio, value $19,275,838.

    13F-HR 0001193125-26-342238 filed by Western Standard 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 226,833 shares
    Change vs previous 13F -41,534 shares

    8.71% of the 13F portfolio, value $16,563,346.

    13F-HR 0001193125-26-205384 filed by Western Standard 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 268,367 shares
    Change vs previous 13F +241,367 shares

    9.48% of the 13F portfolio, value $20,540,810.

    13F-HR 0001193125-26-034830 filed by Western Standard 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 27,000 shares
    Change vs previous 13F not available

    1.11% of the 13F portfolio, value $2,083,320.

    13F-HR 0001193125-25-275716 filed by Western Standard LLC
    Filed (acceptance time not in the bulk data set), ingested

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