Quantum Portfolio Management LLC: AMAT position timeline

Available 13F reports, 13D and 13G stakes and each Form 3, 4 and 5 line of Quantum Portfolio Management LLC on AMAT, newest first. How the timeline and the estimate are built.

Quantum Portfolio Management LLC held 565 AMAT 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 565 shares
Change vs previous 13F +565 shares
0.15% of the 13F portfolio, value $408,495.
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).
period ended2025-03-31
13F 0 shares
Change vs previous 13F -2,100 shares
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).
Exited: the 13F for this period no longer lists the position.
period ended2024-12-31
13F 2,100 shares
Change vs previous 13F +75 shares
0.18% of the 13F portfolio, value $341,523.
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).
period ended2024-09-30
13F 2,025 shares
Change vs previous 13F not available
0.22% of the 13F portfolio, value $409,151.
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).