WESTFIELD CAPITAL MANAGEMENT CO LP
Institutional investor · Portfolio as of Q1 2021
Top Holdings243 positions
Stock | Shares | Value | Weight | Avg Buy | Est. P&L | Held | Conviction |
|---|---|---|---|---|---|---|---|
APPLE INC | 4.6M | $562.6M | 3.5% | $93.15 | +27.50% | 10 qtrssince 2018-Q4 | Increased 59 |
AMAZON.COM INC | 160,867 | $497.7M | 3.1% | $78.94 | +93.52% | 10 qtrssince 2018-Q4 | Decreased 0 |
ALPHABET INC-CL A | 198,625 | $409.7M | 2.5% | $56.83 | +78.71% | 10 qtrssince 2018-Q4 | Decreased 0 |
MICROSOFT CORP | 1.7M | $408.6M | 2.5% | $104.31 | +113.77% | 10 qtrssince 2018-Q4 | Decreased 0 |
META PLATFORMS INC-CLASS A | 1M | $305.7M | 1.9% | $166.53 | +71.74% | 10 qtrssince 2018-Q4 | Decreased 0 |
ICON PLC | 1.5M | $295M | 1.8% | $161.36 | +22.04% | 10 qtrssince 2018-Q4 | Increased 75 |
ZENDESK INC | 2.2M | $289.1M | 1.8% | — | — | 10 qtrssince 2018-Q4 | Decreased 0 |
ASCENDIS PHARMA A/S | 1.9M | $240.7M | 1.5% | $108.86 | +18.18% | 10 qtrssince 2018-Q4 | Increased 52 |
VISA INC-CLASS A SHARES | 1.1M | $235.9M | 1.5% | $142.51 | +42.64% | 10 qtrssince 2018-Q4 | Increased 61 |
BIO-RAD LABORATORIES-A | 404,467 | $231M | 1.4% | $344.51 | +63.76% | 10 qtrssince 2018-Q4 | Decreased 0 |
TRANSDIGM GROUP INC | 376,213 | $221.2M | 1.4% | $367.90 | +32.08% | 10 qtrssince 2018-Q4 | Decreased 0 |
DARDEN RESTAURANTS INC | 1.3M | $189.5M | 1.2% | $85.19 | +44.79% | 3 qtrssince 2020-Q3 | Decreased 0 |
SERVICENOW INC | 368,376 | $184.2M | 1.1% | $37.34 | +161.15% | 10 qtrssince 2018-Q4 | Decreased 0 |
AMETEK INC | 1.4M | $176.6M | 1.1% | $65.09 | +89.68% | 10 qtrssince 2018-Q4 | Decreased 0 |
ADVANCED DRAINAGE SYSTEMS IN | 1.7M | $176.3M | 1.1% | $43.44 | +125.78% | 5 qtrssince 2020-Q1 | Decreased 0 |
SALESFORCE.COM INC | 826,578 | $175.1M | 1.1% | $133.42 | +55.50% | 10 qtrssince 2018-Q4 | Decreased 0 |
INGERSOLL-RAND PLC | 1M | $171.1M | 1.1% | $78.04 | +101.52% | 5 qtrssince 2020-Q1 | Decreased 0 |
WORKDAY INC-CLASS A | 684,223 | $170M | 1.1% | $185.74 | +30.95% | 6 qtrssince 2019-Q4 | Increased 56 |
FORTINET INC | 892,412 | $164.6M | 1.0% | $14.96 | +142.39% | 10 qtrssince 2018-Q4 | Decreased 0 |
THERMO FISHER SCIENTIFIC INC | 360,530 | $164.5M | 1.0% | $222.58 | +100.30% | 10 qtrssince 2018-Q4 | Increased 48 |
WESTFIELD CAPITAL MANAGEMENT CO LP manages $16.1B across 243 positions as of Q1 2021. Top holdings: AAPL (3.5%), AMZN (3.1%), GOOGL (2.5%). Fund DNA: Balanced Allocator. HoldingsIntel Rating: 3/5.0.
Active quarter - 49 new positions, 53 exits, 66 increased. Top move: ICLR (INCREASED, conviction 75). Portfolio: $16.1B across 243 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
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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