WESTFIELD CAPITAL MANAGEMENT CO LP
Institutional investor · Portfolio as of Q2 2025
Top Holdings239 positions
Stock | Shares | Value | Weight | Avg Buy | Est. P&L | Held | Conviction |
|---|---|---|---|---|---|---|---|
NVIDIA CORP | 7.5M | $1.2B | 5.0% | $116.79 | +35.06% | 23 qtrssince 2019-Q4 | Increased 60 |
ASCENDIS PHARMA A/S | 5.5M | $940.9M | 3.9% | $119.23 | +44.44% | 27 qtrssince 2018-Q4 | Decreased 0 |
MICROSOFT CORP | 1.8M | $874.2M | 3.7% | $211.16 | +134.05% | 27 qtrssince 2018-Q4 | Decreased 0 |
APPLE INC | 3.5M | $716.9M | 3.0% | $128.39 | +59.03% | 27 qtrssince 2018-Q4 | Increased 60 |
AMAZON.COM INC | 3.1M | $680.2M | 2.9% | $137.14 | +62.83% | 27 qtrssince 2018-Q4 | Decreased 0 |
AXON ENTERPRISE INC | 790,079 | $654.1M | 2.7% | $312.64 | +164.83% | 11 qtrssince 2022-Q4 | Decreased 0 |
META PLATFORMS INC-CLASS A | 858,402 | $633.6M | 2.7% | $305.10 | +140.10% | 10 qtrssince 2023-Q1 | Decreased 0 |
COMFORT SYSTEMS USA INC | 936,412 | $502.1M | 2.1% | $302.63 | +76.70% | 7 qtrssince 2023-Q4 | Increased 57 |
ALPHABET INC-CL A | 2.6M | $453.2M | 1.9% | $109.55 | +62.72% | 27 qtrssince 2018-Q4 | Decreased 0 |
TRANSDIGM GROUP INC | 290,013 | $441M | 1.8% | $506.55 | +176.91% | 27 qtrssince 2018-Q4 | Decreased 0 |
BROADCOM INC | 1.3M | $368.3M | 1.5% | $175.32 | +56.09% | 27 qtrssince 2018-Q4 | Decreased 0 |
HOWMET AEROSPACE INC | 1.9M | $356.6M | 1.5% | $152.25 | +21.92% | 2 qtrssince 2025-Q1 | Increased 72 |
VERTIV HOLDINGS CO-A | 2.6M | $338.7M | 1.4% | $69.03 | +84.08% | 8 qtrssince 2023-Q3 | Increased 54 |
NETFLIX INC | 251,923 | $337.4M | 1.4% | $81.25 | +62.84% | 4 qtrssince 2024-Q3 | Increased 57 |
SERVICENOW INC | 298,276 | $306.7M | 1.3% | $67.62 | +202.38% | 27 qtrssince 2018-Q4 | Decreased 0 |
TAPESTRY INC | 3.4M | $300.2M | 1.3% | $52.56 | +64.54% | 18 qtrssince 2021-Q1 | Decreased 0 |
LPL FINANCIAL HOLDINGS INC | 782,232 | $293.3M | 1.2% | $199.46 | +87.16% | 27 qtrssince 2018-Q4 | Decreased 0 |
VISA INC-CLASS A SHARES | 796,463 | $282.8M | 1.2% | $164.65 | +113.55% | 27 qtrssince 2018-Q4 | Decreased 0 |
ELI LILLY & CO | 307,493 | $239.7M | 1.0% | $735.66 | +5.07% | 13 qtrssince 2022-Q2 | Increased 57 |
Legend Biotech Corp. Sponsored ADR | 6.5M | $229.7M | 1.0% | $48.73 | -28.94% | 9 qtrssince 2023-Q2 | Decreased 0 |
WESTFIELD CAPITAL MANAGEMENT CO LP manages $23.8B across 239 positions as of Q2 2025. Top holdings: NVDA (5.0%), ASND (3.9%), MSFT (3.7%). Fund DNA: Balanced Allocator. HoldingsIntel Rating: 3/5.0.
Active quarter - 39 new positions, 44 exits, 72 increased. Top move: HWM (INCREASED, conviction 72). Portfolio: $23.8B across 239 positions.
Top holdings by portfolio weight
Portfolio allocation by GICS sector
Behavioral investing profile
Position Outcomes
Best and worst performing positions by estimated return
Top Winners
Top Losers
Cost basis estimates based on full filing history using quarter-end prices. Actual transaction prices are not disclosed in 13F filings.
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Data sourced from SEC EDGAR 13F filings. Not financial advice. Full disclaimer