Filed: 8/12/2025ACC: 0001085146-25-004820
📋 What this filing means
WESTFIELD CAPITAL MANAGEMENT CO LP filed this quarterly 13F‑HR report disclosing 239 equity positions with a total reported market value of $23.84B. This filing provides a transparent view of the manager's long equity holdings as of the quarter end.
239
Positions
$23.84B
Total AUM (reported)
213.38M
Total Shares
Allocation by class
COM$16.06B67.4%
CL A$2.11B8.9%
COM CL A$1.39B5.8%
SPONSORED ADR$953.26M4.0%
SHS$810.29M3.4%
CAP STK CL A$453.20M1.9%
SPONSORED ADS$439.89M1.8%
Portfolio Concentration
Top 3$3.01B12.6%
4–10$4.08B17.1%
11–25$4.11B17.2%
Rest$12.65B53.0%
Top 3 weight
12.6%
Top 10 weight
29.7%
Voting Authority Distribution
Total shares with voting rights: 213.38M
Sole
Full voting authority
153.96M
shares
% of voting shares72.2%
Shared
Joint voting authority
0.00
shares
% of voting shares0.0%
None
No voting authority
59.42M
shares
% of voting shares27.8%
Investment Discretion (by position count)
Sole239
Shared0
Other0
Dominant voting typeSole · 72.2% of voting shares
Institutional Holdings239
Rows:
NVIDIA CORPORATION
SOLEShares7.55M
TypeSH
Market value$1.19B
5.00%
Sole
5.60M
Shared
0.00
None
1.94M
ASCENDIS PHARMA A/S
SOLEShares5.45M
TypeSH
Market value$940.91M
3.95%
Sole
3.89M
Shared
0.00
None
1.56M
MICROSOFT CORP
SOLEShares1.76M
TypeSH
Market value$874.16M
3.67%
Sole
1.31M
Shared
0.00
None
448.34K
APPLE INC
SOLEShares3.49M
TypeSH
Market value$716.90M
3.01%
Sole
2.58M
Shared
0.00
None
909.24K
AMAZON COM INC
SOLEShares3.10M
TypeSH
Market value$680.21M
2.85%
Sole
2.36M
Shared
0.00
None
739.54K
AXON ENTERPRISE INC
SOLEShares790.08K
TypeSH
Market value$654.14M
2.74%
Sole
518.13K
Shared
0.00
None
271.94K
META PLATFORMS INC
SOLEShares858.40K
TypeSH
Market value$633.58M
2.66%
Sole
624.79K
Shared
0.00
None
233.61K
COMFORT SYS USA INC
SOLEShares936.41K
TypeSH
Market value$502.11M
2.11%
Sole
646.83K
Shared
0.00
None
289.58K
ALPHABET INC
SOLEShares2.57M
TypeSH
Market value$453.20M
1.90%
Sole
1.88M
Shared
0.00
None
692.85K
TRANSDIGM GROUP INC
SOLEShares290.01K
TypeSH
Market value$441.01M
1.85%
Sole
201.70K
Shared
0.00
None
88.31K
BROADCOM INC
SOLEShares1.34M
TypeSH
Market value$368.31M
1.54%
Sole
1.04M
Shared
0.00
None
293.97K
HOWMET AEROSPACE INC
SOLEShares1.92M
TypeSH
Market value$356.62M
1.50%
Sole
1.27M
Shared
0.00
None
649.81K
VERTIV HOLDINGS CO
SOLEShares2.64M
TypeSH
Market value$338.67M
1.42%
Sole
1.96M
Shared
0.00
None
673.15K
NETFLIX INC
SOLEShares251.92K
TypeSH
Market value$337.36M
1.41%
Sole
188.09K
Shared
0.00
None
63.84K
SERVICENOW INC
SOLEShares298.28K
TypeSH
Market value$306.65M
1.29%
Sole
211.99K
Shared
0.00
None
86.29K
TAPESTRY INC
SOLEShares3.42M
TypeSH
Market value$300.24M
1.26%
Sole
2.11M
Shared
0.00
None
1.31M
LPL FINL HLDGS INC
SOLEShares782.23K
TypeSH
Market value$293.31M
1.23%
Sole
444.65K
Shared
0.00
None
337.58K
VISA INC
SOLEShares796.46K
TypeSH
Market value$282.78M
1.19%
Sole
704.44K
Shared
0.00
None
92.02K
ELI LILLY & CO
SOLEShares307.49K
TypeSH
Market value$239.70M
1.01%
Sole
232.97K
Shared
0.00
None
74.52K
LEGEND BIOTECH CORP
SOLEShares6.47M
TypeSH
Market value$229.71M
0.96%
Sole
4.52M
Shared
0.00
None
1.95M
BRINKER INTL INC
SOLEShares1.24M
TypeSH
Market value$222.99M
0.94%
Sole
878.80K
Shared
0.00
None
357.78K
FTAI AVIATION LTD
SOLEShares1.92M
TypeSH
Market value$220.35M
0.92%
Sole
1.38M
Shared
0.00
None
532.99K
DEXCOM INC
SOLEShares2.38M
TypeSH
Market value$207.77M
0.87%
Sole
1.80M
Shared
0.00
None
575.71K
MONDAY COM LTD
SOLEShares646.32K
TypeSH
Market value$203.25M
0.85%
Sole
416.32K
Shared
0.00
None
230K
BANK AMERICA CORP
SOLEShares4.22M
TypeSH
Market value$199.58M
0.84%
Sole
2.96M
Shared
0.00
None
1.26M
| Issuer | Class | Shares | Type | Value / Portfolio % | Voting — Sole | Shared | None |
|---|---|---|---|---|---|---|---|
NVIDIA CORPORATIONSOLE | COM | 7.55M | SH | $1.19B 5.00% | 5.60M | 0.00 | 1.94M |
ASCENDIS PHARMA A/SSOLE | SPONSORED ADR | 5.45M | SH | $940.91M 3.95% | 3.89M | 0.00 | 1.56M |
MICROSOFT CORPSOLE | COM | 1.76M | SH | $874.16M 3.67% | 1.31M | 0.00 | 448.34K |
APPLE INCSOLE | COM | 3.49M | SH | $716.90M 3.01% | 2.58M | 0.00 | 909.24K |
AMAZON COM INCSOLE | COM | 3.10M | SH | $680.21M 2.85% | 2.36M | 0.00 | 739.54K |
AXON ENTERPRISE INCSOLE | COM | 790.08K | SH | $654.14M 2.74% | 518.13K | 0.00 | 271.94K |
META PLATFORMS INCSOLE | CL A | 858.40K | SH | $633.58M 2.66% | 624.79K | 0.00 | 233.61K |
COMFORT SYS USA INCSOLE | COM | 936.41K | SH | $502.11M 2.11% | 646.83K | 0.00 | 289.58K |
ALPHABET INCSOLE | CAP STK CL A | 2.57M | SH | $453.20M 1.90% | 1.88M | 0.00 | 692.85K |
TRANSDIGM GROUP INCSOLE | COM | 290.01K | SH | $441.01M 1.85% | 201.70K | 0.00 | 88.31K |
BROADCOM INCSOLE | COM | 1.34M | SH | $368.31M 1.54% | 1.04M | 0.00 | 293.97K |
HOWMET AEROSPACE INCSOLE | COM | 1.92M | SH | $356.62M 1.50% | 1.27M | 0.00 | 649.81K |
VERTIV HOLDINGS COSOLE | COM CL A | 2.64M | SH | $338.67M 1.42% | 1.96M | 0.00 | 673.15K |
NETFLIX INCSOLE | COM | 251.92K | SH | $337.36M 1.41% | 188.09K | 0.00 | 63.84K |
SERVICENOW INCSOLE | COM | 298.28K | SH | $306.65M 1.29% | 211.99K | 0.00 | 86.29K |
TAPESTRY INCSOLE | COM | 3.42M | SH | $300.24M 1.26% | 2.11M | 0.00 | 1.31M |
LPL FINL HLDGS INCSOLE | COM | 782.23K | SH | $293.31M 1.23% | 444.65K | 0.00 | 337.58K |
VISA INCSOLE | COM CL A | 796.46K | SH | $282.78M 1.19% | 704.44K | 0.00 | 92.02K |
ELI LILLY & COSOLE | COM | 307.49K | SH | $239.70M 1.01% | 232.97K | 0.00 | 74.52K |
LEGEND BIOTECH CORPSOLE | SPONSORED ADS | 6.47M | SH | $229.71M 0.96% | 4.52M | 0.00 | 1.95M |
BRINKER INTL INCSOLE | COM | 1.24M | SH | $222.99M 0.94% | 878.80K | 0.00 | 357.78K |
FTAI AVIATION LTDSOLE | SHS | 1.92M | SH | $220.35M 0.92% | 1.38M | 0.00 | 532.99K |
DEXCOM INCSOLE | COM | 2.38M | SH | $207.77M 0.87% | 1.80M | 0.00 | 575.71K |
MONDAY COM LTDSOLE | SHS | 646.32K | SH | $203.25M 0.85% | 416.32K | 0.00 | 230K |
BANK AMERICA CORPSOLE | COM | 4.22M | SH | $199.58M 0.84% | 2.96M | 0.00 | 1.26M |
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