Magnetar Financial LLC: ATEC position timeline

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

Magnetar Financial LLC held 0 ATEC shares at 2026-06-30 per its 13F-HR filed 2026-08-14.

the latest 13F is the newest step

period ended2026-06-30
13F 0 shares
Change vs previous 13F -32,794 shares
13F-HR 0001104659-26-096490 filed by Magnetar Financial LLC
Filed 2026-08-14 (acceptance time not in the bulk data set), ingested 2026-10-06 09:57:27 UTC
Acceptance time not in the bulk data set (spec §4.2).
Exited: the 13F for this period no longer lists the position.
period ended2026-03-31
13F 32,794 shares
Change vs previous 13F +32,794 shares
<0.01% of the 13F portfolio, value $356,799.
13F-HR 0001104659-26-059841 filed by Magnetar Financial LLC
Filed 2026-05-13 (acceptance time not in the bulk data set), ingested 2026-10-06 09:58:43 UTC
Acceptance time not in the bulk data set (spec §4.2).
period ended2025-03-31
13F 0 shares
Change vs previous 13F -710,576 shares
13F-HR 0001104659-25-048974 filed by Magnetar Financial LLC
Filed 2025-05-15 (acceptance time not in the bulk data set), ingested 2026-10-07 18:25:06 UTC
Acceptance time not in the bulk data set (spec §4.2).
Exited: the 13F for this period no longer lists the position.
period ended2024-12-31
13F 710,576 shares
Change vs previous 13F -392,438 shares
0.15% of the 13F portfolio, value $6,523,088.
13F-HR 0001104659-25-011245 filed by Magnetar Financial LLC
Filed 2025-02-11 (acceptance time not in the bulk data set), ingested 2026-10-07 18:25:55 UTC
Acceptance time not in the bulk data set (spec §4.2).
period ended2024-09-30
13F 1,103,014 shares
Change vs previous 13F not available
0.13% of the 13F portfolio, value $6,132,758.
13F-HR 0001104659-24-117644 filed by Magnetar Financial LLC
Filed 2024-11-13 (acceptance time not in the bulk data set), ingested 2026-10-07 18:26:56 UTC
Acceptance time not in the bulk data set (spec §4.2).