Filed: 5/9/2025ACC: 0001085146-25-002864
📋 What this filing means
WESTFIELD CAPITAL MANAGEMENT CO LP filed this quarterly 13F‑HR report disclosing 244 equity positions with a total reported market value of $20.55B. This filing provides a transparent view of the manager's long equity holdings as of the quarter end.
244
Positions
$20.55B
Total AUM (reported)
230.24M
Total Shares
Allocation by class
COM$13.02B63.4%
CL A$1.95B9.5%
COM CL A$1.38B6.7%
SPONSORED ADR$859.42M4.2%
SHS$613.55M3.0%
CAP STK CL A$535.04M2.6%
COM NEW$394.55M1.9%
Portfolio Concentration
Top 3$2.40B11.7%
4–10$3.64B17.7%
11–25$3.27B15.9%
Rest$11.23B54.6%
Top 3 weight
11.7%
Top 10 weight
29.4%
Voting Authority Distribution
Total shares with voting rights: 230.24M
Sole
Full voting authority
166.09M
shares
% of voting shares72.1%
Shared
Joint voting authority
0.00
shares
% of voting shares0.0%
None
No voting authority
64.16M
shares
% of voting shares27.9%
Investment Discretion (by position count)
Sole244
Shared0
Other0
Dominant voting typeSole · 72.1% of voting shares
Institutional Holdings244
Rows:
ASCENDIS PHARMA A/S
SOLEShares5.48M
TypeSH
Market value$854.00M
4.16%
Sole
3.86M
Shared
0.00
None
1.62M
NVIDIA CORPORATION
SOLEShares7.34M
TypeSH
Market value$795.15M
3.87%
Sole
5.45M
Shared
0.00
None
1.89M
APPLE INC
SOLEShares3.40M
TypeSH
Market value$755.50M
3.68%
Sole
2.50M
Shared
0.00
None
899.37K
MICROSOFT CORP
SOLEShares1.83M
TypeSH
Market value$687.94M
3.35%
Sole
1.37M
Shared
0.00
None
462.74K
AMAZON COM INC
SOLEShares3.46M
TypeSH
Market value$658.81M
3.21%
Sole
2.68M
Shared
0.00
None
785.39K
ALPHABET INC
SOLEShares3.46M
TypeSH
Market value$535.04M
2.60%
Sole
2.65M
Shared
0.00
None
805.14K
META PLATFORMS INC
SOLEShares898.54K
TypeSH
Market value$517.88M
2.52%
Sole
658.68K
Shared
0.00
None
239.85K
AXON ENTERPRISE INC
SOLEShares927.80K
TypeSH
Market value$487.98M
2.37%
Sole
597.85K
Shared
0.00
None
329.95K
TRANSDIGM GROUP INC
SOLEShares316.16K
TypeSH
Market value$437.34M
2.13%
Sole
221.39K
Shared
0.00
None
94.78K
VISA INC
SOLEShares904.40K
TypeSH
Market value$316.95M
1.54%
Sole
750.79K
Shared
0.00
None
153.61K
COMFORT SYS USA INC
SOLEShares889.64K
TypeSH
Market value$286.76M
1.40%
Sole
603.28K
Shared
0.00
None
286.36K
LPL FINL HLDGS INC
SOLEShares830.10K
TypeSH
Market value$271.56M
1.32%
Sole
483.37K
Shared
0.00
None
346.73K
SERVICENOW INC
SOLEShares320.28K
TypeSH
Market value$254.99M
1.24%
Sole
222.65K
Shared
0.00
None
97.64K
TAPESTRY INC
SOLEShares3.60M
TypeSH
Market value$253.57M
1.23%
Sole
2.25M
Shared
0.00
None
1.35M
LEGEND BIOTECH CORP
SOLEShares6.92M
TypeSH
Market value$234.71M
1.14%
Sole
4.76M
Shared
0.00
None
2.16M
BROADCOM INC
SOLEShares1.40M
TypeSH
Market value$234.12M
1.14%
Sole
1.09M
Shared
0.00
None
307.52K
ELI LILLY & CO
SOLEShares258.95K
TypeSH
Market value$213.87M
1.04%
Sole
192.77K
Shared
0.00
None
66.19K
FTAI AVIATION LTD
SOLEShares1.89M
TypeSH
Market value$210.12M
1.02%
Sole
1.37M
Shared
0.00
None
524.33K
SALESFORCE INC
SOLEShares782.93K
TypeSH
Market value$210.11M
1.02%
Sole
560.64K
Shared
0.00
None
222.29K
PROGRESSIVE CORP
SOLEShares712.25K
TypeSH
Market value$201.57M
0.98%
Sole
451.55K
Shared
0.00
None
260.70K
NETFLIX INC
SOLEShares213.90K
TypeSH
Market value$199.47M
0.97%
Sole
178.58K
Shared
0.00
None
35.33K
CHECK POINT SOFTWARE TECH LT
SOLEShares864.72K
TypeSH
Market value$197.09M
0.96%
Sole
601.37K
Shared
0.00
None
263.35K
VERTIV HOLDINGS CO
SOLEShares2.38M
TypeSH
Market value$171.66M
0.84%
Sole
1.81M
Shared
0.00
None
563.57K
CASELLA WASTE SYS INC
SOLEShares1.51M
TypeSH
Market value$168.14M
0.82%
Sole
1.13M
Shared
0.00
None
373.17K
DEXCOM INC
SOLEShares2.45M
TypeSH
Market value$167.16M
0.81%
Sole
1.87M
Shared
0.00
None
580.24K
| Issuer | Class | Shares | Type | Value / Portfolio % | Voting — Sole | Shared | None |
|---|---|---|---|---|---|---|---|
ASCENDIS PHARMA A/SSOLE | SPONSORED ADR | 5.48M | SH | $854.00M 4.16% | 3.86M | 0.00 | 1.62M |
NVIDIA CORPORATIONSOLE | COM | 7.34M | SH | $795.15M 3.87% | 5.45M | 0.00 | 1.89M |
APPLE INCSOLE | COM | 3.40M | SH | $755.50M 3.68% | 2.50M | 0.00 | 899.37K |
MICROSOFT CORPSOLE | COM | 1.83M | SH | $687.94M 3.35% | 1.37M | 0.00 | 462.74K |
AMAZON COM INCSOLE | COM | 3.46M | SH | $658.81M 3.21% | 2.68M | 0.00 | 785.39K |
ALPHABET INCSOLE | CAP STK CL A | 3.46M | SH | $535.04M 2.60% | 2.65M | 0.00 | 805.14K |
META PLATFORMS INCSOLE | CL A | 898.54K | SH | $517.88M 2.52% | 658.68K | 0.00 | 239.85K |
AXON ENTERPRISE INCSOLE | COM | 927.80K | SH | $487.98M 2.37% | 597.85K | 0.00 | 329.95K |
TRANSDIGM GROUP INCSOLE | COM | 316.16K | SH | $437.34M 2.13% | 221.39K | 0.00 | 94.78K |
VISA INCSOLE | COM CL A | 904.40K | SH | $316.95M 1.54% | 750.79K | 0.00 | 153.61K |
COMFORT SYS USA INCSOLE | COM | 889.64K | SH | $286.76M 1.40% | 603.28K | 0.00 | 286.36K |
LPL FINL HLDGS INCSOLE | COM | 830.10K | SH | $271.56M 1.32% | 483.37K | 0.00 | 346.73K |
SERVICENOW INCSOLE | COM | 320.28K | SH | $254.99M 1.24% | 222.65K | 0.00 | 97.64K |
TAPESTRY INCSOLE | COM | 3.60M | SH | $253.57M 1.23% | 2.25M | 0.00 | 1.35M |
LEGEND BIOTECH CORPSOLE | SPONSORED ADS | 6.92M | SH | $234.71M 1.14% | 4.76M | 0.00 | 2.16M |
BROADCOM INCSOLE | COM | 1.40M | SH | $234.12M 1.14% | 1.09M | 0.00 | 307.52K |
ELI LILLY & COSOLE | COM | 258.95K | SH | $213.87M 1.04% | 192.77K | 0.00 | 66.19K |
FTAI AVIATION LTDSOLE | SHS | 1.89M | SH | $210.12M 1.02% | 1.37M | 0.00 | 524.33K |
SALESFORCE INCSOLE | COM | 782.93K | SH | $210.11M 1.02% | 560.64K | 0.00 | 222.29K |
PROGRESSIVE CORPSOLE | COM | 712.25K | SH | $201.57M 0.98% | 451.55K | 0.00 | 260.70K |
NETFLIX INCSOLE | COM | 213.90K | SH | $199.47M 0.97% | 178.58K | 0.00 | 35.33K |
CHECK POINT SOFTWARE TECH LTSOLE | ORD | 864.72K | SH | $197.09M 0.96% | 601.37K | 0.00 | 263.35K |
VERTIV HOLDINGS COSOLE | COM CL A | 2.38M | SH | $171.66M 0.84% | 1.81M | 0.00 | 563.57K |
CASELLA WASTE SYS INCSOLE | CL A | 1.51M | SH | $168.14M 0.82% | 1.13M | 0.00 | 373.17K |
DEXCOM INCSOLE | COM | 2.45M | SH | $167.16M 0.81% | 1.87M | 0.00 | 580.24K |
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