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Disclosery

Magnetar Financial LLC: ACA position timeline

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

Magnetar Financial LLC held 316,267 ACA 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 316,267 shares
    Change vs previous 13F +316,267 shares

    0.42% of the 13F portfolio, value $45,950,433.

    13F-HR 0001104659-26-096490 filed by Magnetar Financial LLC
    Filed (acceptance time not in the bulk data set), ingested

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

  2. period ended2025-12-31
    13F 0 shares
    Change vs previous 13F -32,961 shares

    13F-HR 0001104659-26-015538 filed by Magnetar Financial LLC
    Filed (acceptance time not in the bulk data set), ingested

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

    Exited: the 13F for this period no longer lists the position.

  3. period ended2025-09-30
    13F 32,961 shares
    Change vs previous 13F not available

    0.02% of the 13F portfolio, value $3,088,775.

    13F-HR 0001104659-25-111094 filed by Magnetar Financial LLC
    Filed (acceptance time not in the bulk data set), ingested

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