Quantum Portfolio Management LLC: ACM position timeline

Quantum Portfolio Management LLC held 0 ACM shares at 2026-03-31 per its 13F-HR/A filed 2026-05-01.

the latest 13F is the newest step

1. period ended2026-03-31

   13F/A 0 shares

   Change vs previous 13F -9,710 shares

   13F-HR/A 0001172661-26-001580 filed by Quantum Portfolio Management LLC
   Filed 2026-05-01 (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).

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

2. period ended2025-12-31

   13F 9,710 shares

   Change vs previous 13F -5,768 shares

   0.41% of the 13F portfolio, value $925,654.

   13F-HR 0001172661-26-000672 filed by Quantum Portfolio Management LLC
   Filed 2026-02-12 (acceptance time not in the bulk data set), ingested 2026-10-07 03:01:36 UTC

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

3. period ended2025-09-30

   13F 15,478 shares

   Change vs previous 13F +5,477 shares

   0.6% of the 13F portfolio, value $2,019,415.

   13F-HR 0001172661-25-004476 filed by Quantum Portfolio Management LLC
   Filed 2025-10-29 (acceptance time not in the bulk data set), ingested 2026-10-07 03:02:25 UTC

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

4. period ended2025-06-30

   13F 10,001 shares

   Change vs previous 13F -68 shares

   0.54% of the 13F portfolio, value $1,128,713.

   13F-HR 0001172661-25-003208 filed by Quantum Portfolio Management LLC
   Filed 2025-08-13 (acceptance time not in the bulk data set), ingested 2026-10-07 18:23:11 UTC

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

5. period ended2025-03-31

   13F 10,069 shares

   Change vs previous 13F +396 shares

   0.47% of the 13F portfolio, value $933,698.

   13F-HR 0001172661-25-001852 filed by Quantum Portfolio Management LLC
   Filed 2025-05-14 (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).

6. period ended2024-12-31

   13F 9,673 shares

   Change vs previous 13F +416 shares

   0.55% of the 13F portfolio, value $1,033,270.

   13F-HR 0001172661-25-000338 filed by Quantum Portfolio Management LLC
   Filed 2025-01-23 (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).

7. period ended2024-09-30

   13F 9,257 shares

   Change vs previous 13F not available

   0.52% of the 13F portfolio, value $955,970.

   13F-HR 0001172661-24-004357 filed by Quantum Portfolio Management LLC
   Filed 2024-10-24 (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).