WESTFIELD CAPITAL MANAGEMENT CO LP Portfolio Holdings
Q3 2025•235 long positions•$23.8B portfolio value
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Holding282 | Sector | Position↕ | Traded↕ | Ownership↕ | Shares Δ↕ | Shares Δ % | Market Cap↕ | Owned Since↕ |
|---|---|---|---|---|---|---|---|---|
Semiconductors Technology | $1.2B 5.09% | -$193.7M Sold | 0.027% 6.5M shares | 7.5M → 6.5M −$193.7M | -13.76% | $4.54T Mega Cap | Q4 2019 Held for 5y 11m | |
Unknown Unknown | $1.0B 4.39% | -$38.1M Sold | — 5.3M shares | 5.5M → 5.3M −$38.1M | -3.51% | — — | Q4 2022 Held for 2y 11m | |
Software - Infrastructure Technology | $883.2M 3.71% | -$27.0M Sold | 0.023% 1.7M shares | 1.8M → 1.7M −$27.0M | -2.97% | $3.85T Mega Cap | ≤ Q2 2013 Held for 12y 5m+ | |
Consumer Electronics Technology | $849.1M 3.56% | -$40.6M Sold | 0.022% 3.3M shares | 3.5M → 3.3M −$40.6M | -4.57% | $3.78T Mega Cap | ≤ Q2 2013 Held for 12y 5m+ | |
Engineering & Construction Industrials | $687.5M 2.88% | -$85.2M Sold | 2.36% 833.2K shares | 936.4K → 833.2K −$85.2M | -11.02% | $29.1B Large Cap | Q4 2023 Held for 1y 11m | |
Internet Content & Information Communication Services | $563.8M 2.37% | -$66.6M Sold | 0.031% 767.7K shares | 858.4K → 767.7K −$66.6M | -10.57% | $1.84T Mega Cap | Q3 2013 Held for 12y 2m | |
Specialty Retail Consumer Cyclical | $558.1M 2.34% | -$122.7M Sold | 0.024% 2.5M shares | 3.1M → 2.5M −$122.7M | -18.02% | $2.34T Mega Cap | Q3 2015 Held for 10y 2m | |
Internet Content & Information Communication Services | $545.7M 2.29% | -$79.5M Sold | 0.019% 2.2M shares | 2.6M → 2.2M −$79.5M | -12.72% | $2.95T Mega Cap | ≤ Q2 2013 Held for 12y 5m+ | |
Aerospace & Defense Industrials | $523.3M 2.2% | -$43.7M Sold | 0.929% 729.2K shares | 790.1K → 729.2K −$43.7M | -7.71% | $56.3B Large Cap | Q4 2022 Held for 2y 11m | |
Industrial - Machinery Industrials | $393.9M 1.65% | +$18.0M Bought | 0.498% 2.0M shares | 1.9M → 2.0M +$18.0M | +4.78% | $79.1B Large Cap | Q1 2025 Held for 8 months | |
Semiconductors Technology | $384.8M 1.61% | -$56.0M Sold | 0.025% 1.2M shares | 1.3M → 1.2M −$56.0M | -12.71% | $1.56T Mega Cap | Q3 2015 Held for 10y 2m | |
Rental & Leasing Services Industrials | $355.5M 1.49% | +$35.8M Bought | 2.08% 2.1M shares | 1.9M → 2.1M +$35.8M | +11.22% | $17.1B Large Cap | Q2 2024 Held for 1y 5m | |
Electrical Equipment & Parts Industrials | $339.0M 1.42% | -$58.9M Sold | 0.588% 2.2M shares | 2.6M → 2.2M −$58.9M | -14.79% | $57.6B Large Cap | Q3 2023 Held for 2y 2m | |
Aerospace & Defense Industrials | $287.2M 1.21% | -$95.1M Sold | 0.387% 217.9K shares | 290.0K → 217.9K −$95.1M | -24.87% | $74.3B Large Cap | ≤ Q2 2013 Held for 12y 5m+ | |
Luxury Goods Consumer Cyclical | $277.5M 1.16% | -$109.7M Sold | 1.18% 2.5M shares | 3.4M → 2.5M −$109.7M | -28.33% | $23.4B Large Cap | Q1 2021 Held for 4y 8m | |
Entertainment Communication Services | $276.5M 1.16% | -$25.5M Sold | 0.054% 230.6K shares | 251.9K → 230.6K −$25.5M | -8.45% | $509.45B Mega Cap | Q3 2024 Held for 1y 2m | |
Semiconductors Technology | $241.5M 1.01% | +$45.2M Bought | 3.9% 3.4M shares | 2.7M → 3.4M +$45.2M | +23.05% | $6.2B Mid Cap | Q1 2025 Held for 8 months | |
Financial - Credit Services Financial Services | $240.9M 1.01% | -$31.0M Sold | 0.036% 705.8K shares | 796.5K → 705.8K −$31.0M | -11.39% | $662.60B Mega Cap | ≤ Q2 2013 Held for 12y 5m+ | |
Software - Application Technology | $239.3M 1.0% | -$35.2M Sold | 0.125% 260.0K shares | 298.3K → 260.0K −$35.2M | -12.83% | $190.98B Large Cap | Q4 2013 Held for 11y 11m | |
Semiconductors Technology | $219.6M 0.921% | +$219.6M Bought | 0.303% 2.6M shares | — | — | $72.5B Large Cap | Q3 2025 Held for 2 months | |
Drug Manufacturers - General Healthcare | $211.4M 0.887% | -$23.3M Sold | 0.031% 277.0K shares | 307.5K → 277.0K −$23.3M | -9.92% | $684.00B Mega Cap | Q2 2022 Held for 3y 5m | |
Medical - Instruments & Supplies Healthcare | $209.4M 0.879% | +$35.1M Bought | 2.61% 1.4M shares | 1.2M → 1.4M +$35.1M | +20.15% | $8.0B Mid Cap | Q2 2023 Held for 2y 5m | |
Biotechnology Healthcare | $200.8M 0.842% | +$8.5M Bought | 2.81% 2.1M shares | 2.0M → 2.1M +$8.5M | +4.41% | $7.1B Mid Cap | Q3 2024 Held for 1y 2m | |
Banks - Diversified Financial Services | $199.2M 0.836% | -$18.4M Sold | 0.052% 3.9M shares | 4.2M → 3.9M −$18.4M | -8.46% | $382.12B Mega Cap | Q4 2022 Held for 2y 11m | |
Unknown Unknown | $198.7M 0.834% | -$12.3M Sold | — 6.1M shares | 6.5M → 6.1M −$12.3M | -5.84% | — — | Q2 2023 Held for 2y 5m | |
Specialty Retail Consumer Cyclical | $196.4M 0.824% | +$32.6M Bought | 0.275% 45.8K shares | 38.2K → 45.8K +$32.6M | +19.87% | $71.5B Large Cap | Q2 2025 Held for 5 months | |
Financial - Capital Markets Financial Services | $191.5M 0.803% | -$68.8M Sold | 0.719% 575.5K shares | 782.2K → 575.5K −$68.8M | -26.43% | $26.6B Large Cap | Q1 2018 Held for 7y 8m | |
Auto - Manufacturers Consumer Cyclical | $179.8M 0.754% | -$15.2M Sold | 0.012% 404.2K shares | 438.4K → 404.2K −$15.2M | -7.8% | $1.48T Mega Cap | Q1 2021 Held for 4y 8m | |
Industrial - Machinery Industrials | $175.2M 0.735% | +$50.4M Bought | 1.84% 1.2M shares | 870.1K → 1.2M +$50.4M | +40.41% | $9.5B Mid Cap | Q4 2023 Held for 1y 11m | |
Software - Infrastructure Technology | $168.8M 0.708% | -$22.1M Sold | 0.021% 600.2K shares | 678.9K → 600.2K −$22.1M | -11.6% | $801.76B Mega Cap | Q3 2024 Held for 1y 2m | |
Electronic Gaming & Multimedia Technology | $164.8M 0.691% | +$6.7M Bought | 0.172% 1.2M shares | 1.1M → 1.2M +$6.7M | +4.25% | $96.0B Large Cap | Q2 2025 Held for 5 months | |
Asset Management Financial Services | $164.3M 0.689% | -$8.2M Sold | 0.468% 1.0M shares | 1.1M → 1.0M −$8.2M | -4.74% | $35.1B Large Cap | Q3 2021 Held for 4y 2m | |
Renewable Utilities Utilities | $163.4M 0.686% | -$36.6M Sold | 0.098% 265.7K shares | 325.3K → 265.7K −$36.6M | -18.31% | $167.39B Large Cap | Q3 2024 Held for 1y 2m | |
Medical - Healthcare Information Services Healthcare | $162.7M 0.683% | +$42.8M Bought | 1.99% 1.7M shares | 1.3M → 1.7M +$42.8M | +35.68% | $8.2B Mid Cap | Q1 2025 Held for 8 months | |
Software - Application Technology | $162.1M 0.68% | +$19.1M Bought | 1.11% 3.3M shares | 3.0M → 3.3M +$19.1M | +13.35% | $14.6B Large Cap | Q4 2022 Held for 2y 11m | |
Hardware, Equipment & Parts Technology | $158.7M 0.666% | +$75.3M Bought | — 1.5M shares | 774.2K → 1.5M +$75.3M | +90.25% | — — | Q1 2025 Held for 8 months | |
Waste Management Industrials | $156.4M 0.656% | +$9.1M Bought | 2.6% 1.6M shares | 1.6M → 1.6M +$9.1M | +6.16% | $6.0B Mid Cap | Q4 2022 Held for 2y 11m | |
Medical - Devices Healthcare | $155.6M 0.653% | -$4.6M Sold | 0.59% 2.3M shares | 2.4M → 2.3M −$4.6M | -2.86% | $26.4B Large Cap | Q3 2018 Held for 7y 2m | |
Software - Application Technology | $148.4M 0.623% | +$85.4M Bought | 1.77% 786.2K shares | 333.8K → 786.2K +$85.4M | +135.56% | $8.4B Mid Cap | Q2 2025 Held for 5 months | |
Computer Hardware Technology | $146.8M 0.616% | +$60.2M Bought | 0.533% 1.8M shares | 1.0M → 1.8M +$60.2M | +69.44% | $27.5B Large Cap | Q2 2023 Held for 2y 5m | |
Furnishings, Fixtures & Appliances Consumer Cyclical | $144.6M 0.607% | -$253.1K Sold | 0.994% 1.4M shares | 1.4M → 1.4M −$253.1K | -0.17% | $14.6B Large Cap | Q3 2024 Held for 1y 2m | |
Electrical Equipment & Parts Industrials | $141.7M 0.594% | +$141.7M New | 0.716% 1.7M shares | 0 → 1.7M +$141.7M | New | $19.8B Large Cap | Q3 2025 Held for 2 months | |
Software - Infrastructure Technology | $141.6M 0.594% | +$9.4M Bought | 0.663% 3.8M shares | 3.5M → 3.8M +$9.4M | +7.12% | $21.4B Large Cap | Q4 2021 Held for 3y 11m | |
Biotechnology Healthcare | $134.5M 0.564% | +$23.9M Bought | 2.88% 3.7M shares | 3.1M → 3.7M +$23.9M | +21.63% | $4.7B Mid Cap | Q3 2023 Held for 2y 2m | |
Software - Application Technology | $134.3M 0.563% | +$9.1M Bought | 1.34% 693.3K shares | 646.3K → 693.3K +$9.1M | +7.27% | $10.0B Mid Cap | Q4 2023 Held for 1y 11m | |
Semiconductors Technology | $130.5M 0.548% | -$31.5M Sold | — 467.4K shares | 580.3K → 467.4K −$31.5M | -19.46% | — — | Q1 2024 Held for 1y 8m | |
Engineering & Construction Industrials | $130.1M 0.546% | +$40.2M Bought | 1.75% 947.3K shares | 654.2K → 947.3K +$40.2M | +44.8% | $7.4B Mid Cap | Q4 2024 Held for 11 months | |
Software - Application Technology | $129.7M 0.544% | +$45.4M Bought | 0.17% 575.0K shares | 373.6K → 575.0K +$45.4M | +53.89% | $76.4B Large Cap | Q2 2025 Held for 5 months | |
Biotechnology Healthcare | $117.4M 0.493% | +$40.4M Bought | 1.34% 2.5M shares | 1.6M → 2.5M +$40.4M | +52.42% | $8.7B Mid Cap | Q4 2024 Held for 11 months | |
Aerospace & Defense Industrials | $116.8M 0.49% | +$3.5M Bought | 0.504% 2.4M shares | 2.4M → 2.4M +$3.5M | +3.08% | $23.2B Large Cap | Q4 2024 Held for 11 months |
