Portolan Capital Management, LLC: OPRA position timeline

Portolan Capital Management, LLC held 0 OPRA shares at 2026-03-31 per its 13F-HR filed 2026-05-15.

the latest 13F is the newest step

1. period ended2026-03-31

   13F 0 shares

   Change vs previous 13F -631,177 shares

   13F-HR 0001104659-26-062488 filed by Portolan Capital Management, LLC
   Filed 2026-05-15 (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 631,177 shares

   Change vs previous 13F -492,908 shares

   0.48% of the 13F portfolio, value $8,937,466.

   13F-HR 0001104659-26-016304 filed by Portolan Capital Management, LLC
   Filed 2026-02-17 (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 1,124,085 shares

   Change vs previous 13F +247,645 shares

   1.26% of the 13F portfolio, value $23,201,114.

   13F-HR 0001104659-25-111284 filed by Portolan Capital Management, LLC
   Filed 2025-11-13 (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 876,440 shares

   Change vs previous 13F -653,251 shares

   1.04% of the 13F portfolio, value $16,564,716.

   13F-HR 0001104659-25-077571 filed by Portolan Capital 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 1,529,691 shares

   Change vs previous 13F +781,342 shares

   1.85% of the 13F portfolio, value $24,383,275.

   13F-HR 0001104659-25-049320 filed by Portolan Capital Management, 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).

6. period ended2024-12-31

   13F 748,349 shares

   Change vs previous 13F +36,529 shares

   0.95% of the 13F portfolio, value $14,173,730.

   13F-HR 0001104659-25-012988 filed by Portolan Capital Management, LLC
   Filed 2025-02-13 (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 711,820 shares

   Change vs previous 13F not available

   0.8% of the 13F portfolio, value $10,997,619.

   13F-HR 0001104659-24-118686 filed by Portolan Capital Management, LLC
   Filed 2024-11-14 (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).