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Rhenman & Partners Asset Management AB: IONS position timeline

Available 13F reports, 13D and 13G stakes and each Form 3, 4 and 5 line of Rhenman & Partners Asset Management AB on IONS, newest first. How the timeline and the estimate are built.

Rhenman & Partners Asset Management AB held 59,900 IONS 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 59,900 shares
    Change vs previous 13F -33,000 shares

    0.45% of the 13F portfolio, value $4,749,471.

    13F-HR 0001213900-26-088652 filed by Rhenman & Partners Asset Management AB
    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 92,900 shares
    Change vs previous 13F -65,600 shares

    0.86% of the 13F portfolio, value $6,975,861.

    13F-HR 0001213900-26-056196 filed by Rhenman & Partners Asset Management AB
    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 158,500 shares
    Change vs previous 13F -151,500 shares

    1.17% of the 13F portfolio, value $12,538,935.

    13F-HR 0001213900-26-015821 filed by Rhenman & Partners Asset Management AB
    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 310,000 shares
    Change vs previous 13F +128,000 shares

    2.24% of the 13F portfolio, value $20,280,200.

    13F-HR 0001213900-25-109534 filed by Rhenman & Partners Asset Management AB
    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 182,000 shares
    Change vs previous 13F +101,000 shares

    0.91% of the 13F portfolio, value $7,190,820.

    13F-HR 0001213900-25-075249 filed by Rhenman & Partners Asset Management AB
    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 81,000 shares
    Change vs previous 13F -131,500 shares

    0.28% of the 13F portfolio, value $2,443,770.

    13F-HR 0001213900-25-042939 filed by Rhenman & Partners Asset Management AB
    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 212,500 shares
    Change vs previous 13F +17,500 shares

    0.76% of the 13F portfolio, value $7,429,000.

    13F-HR 0001213900-25-013150 filed by Rhenman & Partners Asset Management AB
    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 195,000 shares
    Change vs previous 13F not available

    0.63% of the 13F portfolio, value $7,811,700.

    13F-HR 0001213900-24-097092 filed by Rhenman & Partners Asset Management AB
    Filed (acceptance time not in the bulk data set), ingested

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