WESTFIELD CAPITAL MANAGEMENT CO LP: IDXX position timeline
Available 13F reports, 13D and 13G stakes and each Form 3, 4 and 5 line of WESTFIELD CAPITAL MANAGEMENT CO LP on IDXX, newest first. How the timeline and the estimate are built.
WESTFIELD CAPITAL MANAGEMENT CO LP held 139,925 IDXX shares at 2026-06-30 per its 13F-HR filed 2026-08-12.
the latest 13F is the newest step
- period ended2026-06-3013F 139,925 sharesChange vs previous 13F +7,065 shares
0.24% of the 13F portfolio, value $73,662,240.
13F-HR 0001177719-26-000021 filed by WESTFIELD CAPITAL MANAGEMENT CO LP
Filed (acceptance time not in the bulk data set), ingestedAcceptance time not in the bulk data set (spec §4.2).
- period ended2026-03-3113F 132,860 sharesChange vs previous 13F -14,587 shares
0.31% of the 13F portfolio, value $74,652,473.
13F-HR 0001177719-26-000018 filed by WESTFIELD CAPITAL MANAGEMENT CO LP
Filed (acceptance time not in the bulk data set), ingestedAcceptance time not in the bulk data set (spec §4.2).
- period ended2025-12-3113F 147,447 sharesChange vs previous 13F +53,318 shares
0.42% of the 13F portfolio, value $99,752,238.
13F-HR 0001177719-26-000005 filed by WESTFIELD CAPITAL MANAGEMENT CO LP
Filed (acceptance time not in the bulk data set), ingestedAcceptance time not in the bulk data set (spec §4.2).
- period ended2025-09-3013F 94,129 sharesChange vs previous 13F +94,129 shares
0.25% of the 13F portfolio, value $60,138,155.
13F-HR 0001177719-25-000003 filed by WESTFIELD CAPITAL MANAGEMENT CO LP
Filed (acceptance time not in the bulk data set), ingestedAcceptance time not in the bulk data set (spec §4.2).
- period ended2024-09-3013F 0 sharesChange vs previous 13F not available
13F-HR 0001085146-24-005556 filed by WESTFIELD CAPITAL MANAGEMENT CO LP
Filed (acceptance time not in the bulk data set), ingestedAcceptance time not in the bulk data set (spec §4.2).
Exited: the 13F for this period no longer lists the position.