SIMPLEX TRADING, LLC: ACMR position timeline

SIMPLEX TRADING, LLC held 44,316 ACMR shares at 2026-06-30 per its 13F-HR filed 2026-08-12.

the latest 13F is the newest step

1. period ended2026-06-30

   13F 44,316 shares

   Change vs previous 13F +19,852 shares

   0.15% of the 13F portfolio, value $5,623,257.

   13F-HR 0001488542-26-000011 filed by SIMPLEX TRADING, LLC
   Filed 2026-08-12 (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 24,464 shares

   Change vs previous 13F -86,488 shares

   0.03% of the 13F portfolio, value $962,658.

   13F-HR 0001488542-26-000009 filed by SIMPLEX TRADING, LLC
   Filed 2026-05-14 (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 110,952 shares

   Change vs previous 13F +35,934 shares

   0.12% of the 13F portfolio, value $4,377,056.

   13F-HR 0001488542-26-000002 filed by SIMPLEX TRADING, LLC
   Filed 2026-02-11 (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 75,018 shares

   Change vs previous 13F -20,692 shares

   0.06% of the 13F portfolio, value $2,935,000.

   13F-HR 0001488542-25-000018 filed by SIMPLEX TRADING, LLC
   Filed 2025-11-12 (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 95,710 shares

   Change vs previous 13F -14,418 shares

   0.07% of the 13F portfolio, value $2,478,000.

   13F-HR 0001488542-25-000010 filed by SIMPLEX TRADING, LLC
   Filed 2025-08-05 (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 110,128 shares

   Change vs previous 13F -31,308 shares

   0.09% of the 13F portfolio, value $2,570,000.

   13F-HR 0001488542-25-000007 filed by SIMPLEX TRADING, LLC
   Filed 2025-05-12 (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 141,436 shares

   Change vs previous 13F +106,610 shares

   0.06% of the 13F portfolio, value $2,135,000.

   13F-HR 0001488542-25-000001 filed by SIMPLEX TRADING, 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).

8. period ended2024-09-30

   13F 34,826 shares

   Change vs previous 13F not available

   0.02% of the 13F portfolio, value $706,000.

   13F-HR 0001488542-24-000015 filed by SIMPLEX TRADING, LLC
   Filed 2024-11-08 (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).