Quantum Portfolio Management LLC: AMG position timeline

Quantum Portfolio Management LLC held 2,119 AMG 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 2,119 shares

   Change vs previous 13F -19 shares

   0.26% of the 13F portfolio, value $717,070.

   13F-HR 0001420506-26-001701 filed by Quantum Portfolio Management 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).

2. period ended2026-03-31

   13F/A 2,138 shares

   Change vs previous 13F -107 shares

   0.26% of the 13F portfolio, value $591,585.

   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).

3. period ended2025-12-31

   13F 2,245 shares

   Change vs previous 13F -1,364 shares

   0.29% of the 13F portfolio, value $647,189.

   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).

4. period ended2025-09-30

   13F 3,609 shares

   Change vs previous 13F +1,259 shares

   0.26% of the 13F portfolio, value $860,494.

   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).

5. period ended2025-06-30

   13F 2,350 shares

   Change vs previous 13F -99 shares

   0.22% of the 13F portfolio, value $462,410.

   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).

6. period ended2025-03-31

   13F 2,449 shares

   Change vs previous 13F -2,491 shares

   0.21% of the 13F portfolio, value $411,505.

   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).

7. period ended2024-12-31

   13F 4,940 shares

   Change vs previous 13F -256 shares

   0.49% of the 13F portfolio, value $913,505.

   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).

8. period ended2024-09-30

   13F 5,196 shares

   Change vs previous 13F not available

   0.5% of the 13F portfolio, value $923,849.

   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).