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SEI INVESTMENTS CO: ARGX position timeline

Available 13F reports, 13D and 13G stakes and each Form 3, 4 and 5 line of SEI INVESTMENTS CO on ARGX, newest first. How the timeline and the estimate are built.

SEI INVESTMENTS CO held 255,073 ARGX shares at 2026-06-30 per its 13F-HR filed 2026-08-14.

the latest 13F is the newest step

  1. period ended2026-06-30
    13F 255,073 shares
    Change vs previous 13F -31,893 shares

    0.21% of the 13F portfolio, value $236,651,864.

    13F-HR 0002048251-26-006553 filed by SEI INVESTMENTS CO
    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 286,966 shares
    Change vs previous 13F -43,540 shares

    0.19% of the 13F portfolio, value $209,555,667.

    13F-HR 0002048251-26-003739 filed by SEI INVESTMENTS CO
    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 330,506 shares
    Change vs previous 13F +18,238 shares

    0.27% of the 13F portfolio, value $277,936,826.

    13F-HR 0000350894-26-000005 filed by SEI INVESTMENTS CO
    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 312,268 shares
    Change vs previous 13F -4,131 shares

    0.25% of the 13F portfolio, value $230,317,992.

    13F-HR 0002048251-25-002343 filed by SEI INVESTMENTS CO
    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 316,399 shares
    Change vs previous 13F -44,601 shares

    0.2% of the 13F portfolio, value $174,403,819.

    13F-HR 0001041062-25-000162 filed by SEI INVESTMENTS CO
    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/A 361,000 shares
    Change vs previous 13F -5,620 shares

    0.27% of the 13F portfolio, value $213,662,248.

    13F-HR/A 0001041062-25-000106 filed by SEI INVESTMENTS CO
    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 366,620 shares
    Change vs previous 13F -14,075 shares

    0.29% of the 13F portfolio, value $225,474,980.

    13F-HR 0001041062-25-000019 filed by SEI INVESTMENTS CO
    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 380,695 shares
    Change vs previous 13F not available

    0.27% of the 13F portfolio, value $206,365,876.

    13F-HR 0001041062-24-000165 filed by SEI INVESTMENTS CO
    Filed (acceptance time not in the bulk data set), ingested

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