WESTFIELD CAPITAL MANAGEMENT CO LP
CIK: 0001177719Latest portfolio: $24.0B · Q4 2025
Holdings
241
Total Value
$24.0B
New Positions
39
Closed Positions
33
Top Holdings
View All 241 Holdings →| # | Stock | Shares | Value | % Portfolio | Change | Type |
|---|---|---|---|---|---|---|
| 1 | NVDANVIDIA CORPORATION | 5,951,049 | $1.1B | 4.62% | -556,116 | |
| 2 | ASNDASCENDIS PHARMA A/S | 5,185,696 | $1.1B | 4.60% | -74,213 | |
| 3 | AAPLAPPLE INC | 3,274,318 | $890.0M | 3.71% | -60,227 | |
| 4 | MSFTMICROSOFT CORP | 1,621,219 | $784.0M | 3.27% | -84,017 | |
| 5 | GOOGLALPHABET INC | 2,178,478 | $681.0M | 2.84% | -66,172 | |
| 6 | FIXCOMFORT SYS USA INC | 668,835 | $624.0M | 2.60% | -164,360 | |
| 7 | AMZNAMAZON COM INC | 2,330,770 | $537.0M | 2.24% | -210,959 | |
| 8 | AXONAXON ENTERPRISE INC | 831,177 | $472.0M | 1.97% | +102K | |
| 9 | FTAIFTAI AVIATION LTD | 2,350,625 | $462.0M | 1.92% | +220K | |
| 10 | HWMHOWMET AEROSPACE INC | 2,219,125 | $454.0M | 1.89% | +212K | |
| 11 | METAMETA PLATFORMS INC | 655,283 | $432.0M | 1.80% | -112,374 | |
| 12 | AVGOBROADCOM INC | 1,112,318 | $384.0M | 1.60% | -54,044 | |
| 13 | VRTVERTIV HOLDINGS CO | 2,277,716 | $369.0M | 1.54% | +30K | |
| 14 | LLYELI LILLY & CO | 277,549 | $298.0M | 1.24% | +544 | |
| 15 | TPRTAPESTRY INC | 2,098,104 | $268.0M | 1.12% | -352,567 | |
| 16 | RVMDREVOLUTION MEDICINES INC | 2,845,013 | $226.0M | 0.94% | +331K | |
| 17 | NOWSERVICENOW INC | 1,476,803 | $226.0M | 0.94% | +1.2M | |
| 18 | LPLALPL FINL HLDGS INC | 625,562 | $223.0M | 0.93% | +50K | |
| 19 | VVISA INC | 603,926 | $211.0M | 0.88% | -101,841 | |
| 20 | BACBANK AMERICA CORP | 3,823,609 | $210.0M | 0.87% | -37,494 | |
| 21 | TSLATESLA INC | 461,675 | $207.0M | 0.86% | +57K | |
| 22 | 3M4MASIMO CORP | 1,522,049 | $197.0M | 0.82% | +103K | |
| 23 | ARESARES MANAGEMENT CORPORATION | 1,151,200 | $186.0M | 0.77% | +124K | |
| 24 | AMEAMETEK INC | 900,216 | $184.0M | 0.77% | +542K | |
| 25 | SMTCSEMTECH CORP | 2,448,612 | $180.0M | 0.75% | -931,761 |
Quarterly Changes
New Positions
Increased Positions
Sector Breakdown
Technology0.0% ($1.109000890000784e+284T)
Industrials0.0% ($6.24000472000462e+183T)
Healthcare0.0% ($1.105000298000226e+175T)
Financial Services0.0% ($2.2300021100020999e+161T)
Consumer Cyclical0.0% ($5.37000268000207e+111T)
Unknown0.0% ($1.97000180000104e+54T)
Communication Services0.0% ($6.810004320001489e+36T)
Energy0.0% ($8.700083000530004e+24T)
Utilities0.0% ($116000860004600.0T)
Consumer Defensive0.0% ($7000056000900.1T)
Basic Materials0.0% ($72000.5T)
Real Estate0.0% ($0)
Filing History
| Quarter | Filing Date | Portfolio Value | Holdings |
|---|---|---|---|
| Q4 2025 | Feb 11, 2026 | $24.0B | 241 |
| Q3 2025 | Nov 12, 2025 | $23.8T | 235 |
| Q2 2025 | Aug 12, 2025 | $23.8T | 239 |
| Q1 2025 | May 9, 2025 | $20.5T | 244 |
| Q4 2024 | Feb 11, 2025 | $23.0T | 239 |
| Q3 2024 | Nov 12, 2024 | $22133.8T | 247 |
| Q2 2024 | Aug 14, 2024 | $20353.5T | 248 |
| Q1 2024 | May 10, 2024 | $19047.7T | 244 |
| Q4 2023 | Feb 9, 2024 | $17157.5T | 239 |
| Q3 2023 | Nov 13, 2023 | $14680.8T | 234 |
| Q2 2023 | Aug 11, 2023 | $15739.1T | 227 |
| Q1 2023 | May 12, 2023 | $14151.0T | 222 |
| Q4 2022 | Feb 13, 2023 | $12964.8T | 226 |
| Q3 2022 | Nov 14, 2022 | $12.6T | 230 |
| Q2 2022 | Aug 12, 2022 | $12.7T | 235 |
| Q1 2022 | May 16, 2022 | $15.6T | 235 |
| Q4 2021 | Feb 10, 2022 | $16.8T | 244 |
| Q3 2021 | Nov 12, 2021 | $16.6T | 235 |
| Q2 2021 | Aug 10, 2021 | $16.7T | 241 |
| Q1 2021 | May 14, 2021 | $16.1T | 243 |
| Q4 2020 | Feb 12, 2021 | $16.9T | 247 |
| Q3 2020 | Nov 13, 2020 | $15.4T | 235 |
| Q2 2020 | Aug 13, 2020 | $14.5T | 230 |
| Q1 2020 | May 14, 2020 | $11.4T | 216 |
| Q4 2019 | Feb 13, 2020 | $14.0T | 231 |
| Q3 2019 | Nov 8, 2019 | $12.5T | 234 |
| Q2 2019 | Aug 13, 2019 | $13.3T | 243 |
| Q1 2019 | May 14, 2019 | $13.1T | 246 |
| Q4 2018 | Feb 8, 2019 | $11.7T | 240 |
| Q3 2018 | Nov 14, 2018 | $14.2T | 249 |
| Q2 2018 | Aug 13, 2018 | $13.4T | 243 |
| Q1 2018 | May 14, 2018 | $13.0T | 248 |
| Q4 2017 | Feb 13, 2018 | $13.1T | 244 |
| Q3 2017 | Nov 13, 2017 | $13.0T | 251 |
| Q2 2017 | Aug 11, 2017 | $11.7T | 249 |
| Q1 2017 | May 12, 2017 | $11.6T | 258 |
| Q4 2016 | Feb 10, 2017 | $11.4T | 253 |
| Q3 2016 | Nov 10, 2016 | $12.4T | 249 |
| Q2 2016 | Aug 12, 2016 | $12.1T | 257 |
| Q1 2016 | May 13, 2016 | $13.1T | 252 |
Fund Information
WESTFIELD CAPITAL MANAGEMENT CO LP is an institutional investment manager that files 13F reports with the SEC. As of the Q4 2025 filing, the fund reported a portfolio valued at $24.0B across 241 holdings. The largest position is NVIDIA CORPORATION (NVDA), representing 4.6% of the portfolio. Compared to the previous quarter, the fund opened 39 new positions and closed 33 positions. 13F filings are required quarterly disclosures that provide transparency into the holdings of institutional investment managers with at least $100 million in qualifying assets.