WESTFIELD CAPITAL MANAGEMENT CO LP: IONS position timeline

WESTFIELD CAPITAL MANAGEMENT CO LP held 4,233 IONS 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 4,233 shares

   Change vs previous 13F +731 shares

   <0.01% of the 13F portfolio, value $335,635.

   13F-HR 0001177719-26-000021 filed by WESTFIELD CAPITAL MANAGEMENT CO LP
   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 3,502 shares

   Change vs previous 13F +345 shares

   <0.01% of the 13F portfolio, value $262,965.

   13F-HR 0001177719-26-000018 filed by WESTFIELD CAPITAL MANAGEMENT CO LP
   Filed 2026-05-11 (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 3,157 shares

   Change vs previous 13F +64 shares

   <0.01% of the 13F portfolio, value $249,750.

   13F-HR 0001177719-26-000005 filed by WESTFIELD CAPITAL MANAGEMENT CO LP
   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 3,093 shares

   Change vs previous 13F -6,468 shares

   <0.01% of the 13F portfolio, value $202,344.

   13F-HR 0001177719-25-000003 filed by WESTFIELD CAPITAL MANAGEMENT CO LP
   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 9,561 shares

   Change vs previous 13F not available

   <0.01% of the 13F portfolio, value $377,755.

   13F-HR 0001085146-25-004820 filed by WESTFIELD CAPITAL MANAGEMENT CO LP
   Filed 2025-08-12 (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).