Westfield Capital Management Co Lp

Entity
Company
Business address
One Financial Center, 23 Rd Floor, 02111 Boston, MA
Phone
6174287100
State of incorporation
DE
Fiscal year end
December 31
Former names
WESTFIELD CAPITAL MANAGEMENT CO LLC (to 5/12/2008)
13F signature
Brandi McMahon - Vice President, Deputy Chief Compliance Officer
13D/G Schedule signature
Westfield Capital Management Company, L.P. - Vice President, Deputy Chief Compliance Officer
Insider ownership signature
Brandi McMahon, Vice President, Deputy CCO
All SEC filings
View on sec.gov
Get insider transactions for this reporting owner
Westfield Capital Management Co Lp has filed 611 SEC EDGAR filings since 7/24/2002

Latest Filings

Form type Document Filing Description Filing date Reporting date File number(s)
13F-HR Open Document Open Filing Nov 12, 2025 Sep 30, 2025 028-10220
13F-HR Open Document Open Filing Aug 12, 2025 Jun 30, 2025 028-10220
N-PX Open Document Open Filing Aug 6, 2025 Jun 30, 2025 028-10220
13F-HR Open Document Open Filing May 9, 2025 Mar 31, 2025 028-10220
SCHEDULE 13G/A Open Document Open Filing Mar 5, 2025
13F-HR Open Document Open Filing Feb 11, 2025 Dec 31, 2024 028-10220
SCHEDULE 13G/A Open Document Open Filing Feb 11, 2025
SCHEDULE 13G/A Open Document Open Filing Feb 11, 2025
SCHEDULE 13G Open Document Open Filing Feb 11, 2025
SCHEDULE 13G Open Document Open Filing Feb 11, 2025
SCHEDULE 13G/A Open Document Open Filing Feb 10, 2025
13F-HR Open Document Open Filing Nov 12, 2024 Sep 30, 2024 028-10220
3 Open Document Open Filing Sep 3, 2024 Sep 3, 2024 811-04537
N-PX Open Document Open Filing Aug 16, 2024 Jun 30, 2024 028-10220
13F-HR Open Document Open Filing Aug 14, 2024 Jun 30, 2024 028-10220
SC 13G/A Open Document Open Filing WESTFIELD CAPITAL MANAGEMENT COMPANY, L.P. Aug 5, 2024
SC 13G/A Open Document Open Filing WESTFIELD CAPITAL MANAGEMENT COMPANY, L.P. Jul 8, 2024
13F-HR Open Document Open Filing May 10, 2024 Mar 31, 2024 028-10220
SC 13G/A Open Document Open Filing WESTFIELD CAPITAL MANAGEMENT COMPANY, L.P. May 8, 2024
SC 13G/A Open Document Open Filing WESTFIELD CAPITAL MANAGEMENT COMPANY, L.P. Apr 4, 2024
13F-HR Open Document Open Filing Feb 9, 2024 Dec 31, 2023 028-10220
SC 13G/A Open Document Open Filing WESTFIELD CAPITAL MANAGEMENT COMPANY, L.P. Feb 2, 2024
SC 13G Open Document Open Filing WESTFIELD CAPITAL MANAGEMENT COMPANY, L.P. Jan 10, 2024
13F-HR Open Document Open Filing Nov 13, 2023 Sep 30, 2023 028-10220
13F-HR Open Document Open Filing Aug 11, 2023 Jun 30, 2023 028-10220
SC 13G/A Open Document Open Filing WESTFIELD CAPITAL MANAGEMENT COMPANY, L.P. Jul 5, 2023
13F-HR Open Document Open Filing May 12, 2023 Mar 31, 2023 028-10220
13F-HR Open Document Open Filing Feb 13, 2023 Dec 31, 2022 028-10220
SC 13G/A Open Document Open Filing WESTFIELD CAPITAL MANAGEMENT COMPANY, L.P. Feb 2, 2023
SC 13G Open Document Open Filing WESTFIELD CAPITAL MANAGEMENT COMPANY, L.P. Feb 2, 2023
13F-HR Open Document Open Filing Nov 14, 2022 Sep 30, 2022 028-10220
13F-HR Open Document Open Filing Aug 12, 2022 Jun 30, 2022 028-10220
13F-HR Open Document Open Filing May 16, 2022 Mar 31, 2022 028-10220
13F-HR Open Document Open Filing Feb 10, 2022 Dec 31, 2021 028-10220
SC 13G Open Document Open Filing WESTFIELD CAPITAL MANAGEMENT COMPANY, L.P. Feb 1, 2022
SC 13G/A Open Document Open Filing WESTFIELD CAPITAL MANAGEMENT COMPANY, L.P. Feb 1, 2022
13F-HR Open Document Open Filing Nov 12, 2021 Sep 30, 2021 028-10220
13F-HR Open Document Open Filing Aug 10, 2021 Jun 30, 2021 028-10220
SC 13G/A Open Document Open Filing WESTFIELD CAPITAL MANAGEMENT COMPANY, L.P. Jul 2, 2021
13F-HR Open Document Open Filing May 14, 2021 Mar 31, 2021 028-10220
13F-HR Open Document Open Filing Feb 12, 2021 Dec 31, 2020 028-10220
SC 13G/A Open Document Open Filing WESTFIELD CAPITAL MANAGEMENT COMPANY, L.P. Feb 1, 2021
SC 13G/A Open Document Open Filing WESTFIELD CAPITAL MANAGEMENT COMPANY, L.P. Jan 7, 2021
SC 13G Open Document Open Filing WESTFIELD CAPITAL MANAGEMENT COMPANY, L.P. Jan 7, 2021
13F-HR Open Document Open Filing Nov 13, 2020 Sep 30, 2020 028-10220
13F-HR Open Document Open Filing Aug 13, 2020 Jun 30, 2020 028-10220
13F-HR Open Document Open Filing May 14, 2020 Mar 31, 2020 028-10220
13F-HR Open Document Open Filing Feb 13, 2020 Dec 31, 2019 028-10220
SC 13G Open Document Open Filing WESTFIELD CAPITAL MANAGEMENT COMPANY, L.P. Jan 7, 2020
SC 13G/A Open Document Open Filing WESTFIELD CAPITAL MANAGEMENT COMPANY, L.P. Jan 7, 2020
SC 13G/A Open Document Open Filing WESTFIELD CAPITAL MANAGEMENT COMPANY, L.P. Jan 7, 2020
13F-HR Open Document Open Filing Nov 8, 2019 Sep 30, 2019 028-10220
SC 13G/A Open Document Open Filing WESTFIELD CAPITAL MANAGEMENT COMPANY, L.P. Sep 4, 2019
13F-HR Open Document Open Filing Aug 13, 2019 Jun 30, 2019 028-10220
13F-HR Open Document Open Filing May 14, 2019 Mar 31, 2019 028-10220
SC 13G/A Open Document Open Filing WESTFIELD CAPITAL MANAGEMENT COMPANY, L.P. Apr 5, 2019
13F-HR Open Document Open Filing Feb 8, 2019 Dec 31, 2018 028-10220
SC 13G Open Document Open Filing WESTFIELD CAPITAL MANAGEMENT COMPANY, L.P. Feb 7, 2019
13F-HR Open Document Open Filing Nov 14, 2018 Sep 30, 2018 028-10220
13F-HR Open Document Open Filing Aug 13, 2018 Jun 30, 2018 028-10220
SC 13G/A Open Document Open Filing WESTFIELD CAPITAL MANAGEMENT COMPANY, L.P. Jul 3, 2018
13F-HR Open Document Open Filing May 14, 2018 Mar 31, 2018 028-10220
SC 13G/A Open Document Open Filing WESTFIELD CAPITAL MANAGEMENT COMPANY, L.P. May 2, 2018
SC 13G/A Open Document Open Filing WESTFIELD CAPITAL MANAGEMENT COMPANY, L.P. Mar 2, 2018
13F-HR Open Document Open Filing Feb 13, 2018 Dec 31, 2017 028-10220
SC 13G/A Open Document Open Filing WESTFIELD CAPITAL MANAGEMENT COMPANY, L.P. Dec 8, 2017
13F-HR Open Document Open Filing Nov 13, 2017 Sep 30, 2017 028-10220
SC 13G/A Open Document Open Filing WESTFIELD CAPITAL MANAGEMENT COMPANY, L.P. Sep 7, 2017
13F-HR Open Document Open Filing Aug 11, 2017 Jun 30, 2017 028-10220
SC 13G/A Open Document Open Filing WESTFIELD CAPITAL MANAGEMENT COMPANY, L.P. Aug 8, 2017
SC 13G/A Open Document Open Filing WESTFIELD CAPITAL MANAGEMENT COMPANY, L.P. Aug 3, 2017
13F-HR Open Document Open Filing May 12, 2017 Mar 31, 2017 028-10220
SC 13G/A Open Document Open Filing WESTFIELD CAPITAL MANAGEMENT COMPANY, L.P. Apr 10, 2017
SC 13G/A Open Document Open Filing WESTFIELD CAPITAL MANAGEMENT COMPANY, L.P. Apr 7, 2017
SC 13G/A Open Document Open Filing WESTFIELD CAPITAL MANAGEMENT COMPANY, L.P. Apr 7, 2017
13F-HR Open Document Open Filing Feb 10, 2017 Dec 31, 2016 028-10220
SC 13G/A Open Document Open Filing WESTFIELD CAPITAL MANAGEMENT COMPANY, L.P. Feb 10, 2017
SC 13G/A Open Document Open Filing WESTFIELD CAPITAL MANAGEMENT COMPANY, L.P. Feb 10, 2017
SC 13G/A Open Document Open Filing WESTFIELD CAPITAL MANAGEMENT COMPANY, L.P. Feb 10, 2017
SC 13G/A Open Document Open Filing WESTFIELD CAPITAL MANAGEMENT COMPANY, L.P. Feb 10, 2017
SC 13G/A Open Document Open Filing WESTFIELD CAPITAL MANAGEMENT COMPANY, L.P. Feb 10, 2017
SC 13G/A Open Document Open Filing WESTFIELD CAPITAL MANAGEMENT COMPANY, L.P. Feb 10, 2017
SC 13G/A Open Document Open Filing WESTFIELD CAPITAL MANAGEMENT COMPANY, L.P. Feb 10, 2017
SC 13G/A Open Document Open Filing WESTFIELD CAPITAL MANAGEMENT COMPANY, L.P. Feb 10, 2017
13F-HR Open Document Open Filing Nov 10, 2016 Sep 30, 2016 028-10220
SC 13G/A Open Document Open Filing WESTFIELD CAPITAL MANAGEMENT COMPANY, L.P. Sep 9, 2016
13F-HR Open Document Open Filing Aug 12, 2016 Jun 30, 2016 028-10220
13F-HR Open Document Open Filing May 13, 2016 Mar 31, 2016 028-10220
13F-HR Open Document Open Filing Feb 11, 2016 Dec 31, 2015 028-10220
SC 13G/A Open Document Open Filing WESTFIELD CAPITAL MANAGEMENT COMPANY, L.P. Feb 10, 2016
SC 13G Open Document Open Filing WESTFIELD CAPITAL MANAGEMENT COMPANY, L.P. Feb 10, 2016
SC 13G Open Document Open Filing WESTFIELD CAPITAL MANAGEMENT COMPANY, L.P. Feb 10, 2016
SC 13G Open Document Open Filing WESTFIELD CAPITAL MANAGEMENT COMPANY, L.P. Feb 10, 2016
SC 13G Open Document Open Filing WESTFIELD CAPITAL MANAGEMENT COMPANY, L.P. Feb 10, 2016
SC 13G Open Document Open Filing WESTFIELD CAPITAL MANAGEMENT COMPANY, L.P. Feb 10, 2016
SC 13G/A Open Document Open Filing WESTFIELD CAPITAL MANAGEMENT COMPANY, L.P. Feb 10, 2016
SC 13G/A Open Document Open Filing WESTFIELD CAPITAL MANAGEMENT COMPANY, L.P. Feb 5, 2016
SC 13G/A Open Document Open Filing WESTFIELD CAPITAL MANAGEMENT COMPANY, L.P. Feb 5, 2016
SC 13G/A Open Document Open Filing WESTFIELD CAPITAL MANAGEMENT COMPANY, L.P. Feb 5, 2016
13F-HR Open Document Open Filing Nov 12, 2015 Sep 30, 2015 028-10220
SC 13G/A Open Document Open Filing WESTFIELD CAPITAL MANAGEMENT COMPANY, L.P. Nov 9, 2015
SC 13G/A Open Document Open Filing WESTFIELD CAPITAL MANAGEMENT COMPANY, L.P. Oct 9, 2015
13F-HR Open Document Open Filing Aug 13, 2015 Jun 30, 2015 028-10220
SC 13G/A Open Document Open Filing WESTFIELD CAPITAL MANAGEMENT COMPANY, L.P. Aug 7, 2015
SC 13G/A Open Document Open Filing Jul 13, 2015
SC 13G/A Open Document Open Filing WESTFIELD CAPITAL MANAGEMENT COMPANY, L.P. Jun 9, 2015
13F-HR Open Document Open Filing May 13, 2015 Mar 31, 2015 028-10220
SC 13G/A Open Document Open Filing WESTFIELD CAPITAL MANAGEMENT COMPANY, L.P. Apr 8, 2015
SC 13G/A Open Document Open Filing WESTFIELD CAPITAL MANAGEMENT COMPANY, L.P. Mar 6, 2015
13F-HR Open Document Open Filing Feb 13, 2015 Dec 31, 2014 028-10220
SC 13G Open Document Open Filing Feb 10, 2015
SC 13G/A Open Document Open Filing Feb 10, 2015
SC 13G Open Document Open Filing Feb 10, 2015
SC 13G Open Document Open Filing Feb 10, 2015
SC 13G/A Open Document Open Filing Feb 10, 2015
SC 13G Open Document Open Filing Feb 10, 2015
SC 13G/A Open Document Open Filing Feb 10, 2015
13F-HR Open Document Open Filing Nov 12, 2014 Sep 30, 2014 028-10220
SC 13G/A Open Document Open Filing Nov 10, 2014
SC 13G/A Open Document Open Filing Oct 8, 2014
13F-HR Open Document Open Filing Aug 13, 2014 Jun 30, 2014 028-10220
SC 13G Open Document Open Filing Jul 10, 2014
13F-HR Open Document Open Filing May 12, 2014 Mar 31, 2014 028-10220
SC 13G/A Open Document Open Filing Mar 10, 2014
SC 13G/A Open Document Open Filing SCHEDULE 13G/A Feb 7, 2014
SC 13G/A Open Document Open Filing SCHEDULE 13G/A Feb 7, 2014
SC 13G/A Open Document Open Filing SCHEDULE 13G/A Feb 7, 2014
SC 13G/A Open Document Open Filing SCHEDULE 13G/A Feb 7, 2014
SC 13G/A Open Document Open Filing SCHEDULE 13G/A Feb 7, 2014
SC 13G/A Open Document Open Filing SCHEDULE 13G/A Feb 7, 2014
SC 13G/A Open Document Open Filing SCHEDULE 13G/A Feb 7, 2014
SC 13G/A Open Document Open Filing SCHEDULE 13G/A Feb 7, 2014
SC 13G/A Open Document Open Filing SCHEDULE 13G/A Feb 7, 2014
SC 13G/A Open Document Open Filing SCHEDULE 13G/A Feb 7, 2014
SC 13G/A Open Document Open Filing SCHEDULE 13G/A Feb 7, 2014
SC 13G/A Open Document Open Filing SCHEDULE 13G/A Feb 7, 2014
13F-HR Open Document Open Filing Feb 7, 2014 Dec 31, 2013 028-10220