Filed: 8/11/2023ACC: 0001085146-23-003305
📋 What this filing means
WESTFIELD CAPITAL MANAGEMENT CO LP filed this quarterly 13F‑HR report disclosing 227 equity positions with a total reported market value of $15.74B. This filing provides a transparent view of the manager's long equity holdings as of the quarter end.
227
Positions
$15.74B
Total AUM (reported)
152.14M
Total Shares
Allocation by class
COM$11.65B74.0%
CL A$1.03B6.5%
SHS$615.73M3.9%
COM CL A$546.57M3.5%
COM NEW$521.90M3.3%
SPONSORED ADR$431.73M2.7%
CAP STK CL A$405.74M2.6%
Portfolio Concentration
Top 3$1.41B9.0%
4–10$2.02B12.8%
11–25$2.61B16.6%
Rest$9.70B61.6%
Top 3 weight
9.0%
Top 10 weight
21.8%
Voting Authority Distribution
Total shares with voting rights: 152.14M
Sole
Full voting authority
130.06M
shares
% of voting shares85.5%
Shared
Joint voting authority
0.00
shares
% of voting shares0.0%
None
No voting authority
22.08M
shares
% of voting shares14.5%
Investment Discretion (by position count)
Sole227
Shared0
Other0
Dominant voting typeSole · 85.5% of voting shares
Institutional Holdings227
Rows:
APPLE INC
SOLEShares2.75M
TypeSH
Market value$532.65M
3.38%
Sole
2.40M
Shared
0.00
None
350.87K
MICROSOFT CORP
SOLEShares1.38M
TypeSH
Market value$470.54M
2.99%
Sole
1.18M
Shared
0.00
None
201.57K
ALPHABET INC
SOLEShares3.39M
TypeSH
Market value$405.74M
2.58%
Sole
3M
Shared
0.00
None
391.15K
ICON PLC
SOLEShares1.38M
TypeSH
Market value$344.64M
2.19%
Sole
1.17M
Shared
0.00
None
210.10K
TRANSDIGM GROUP INC
SOLEShares363.80K
TypeSH
Market value$325.29M
2.07%
Sole
303.67K
Shared
0.00
None
60.12K
ASCENDIS PHARMA A/S
SOLEShares3.63M
TypeSH
Market value$324.13M
2.06%
Sole
3.22M
Shared
0.00
None
408.23K
AMAZON COM INC
SOLEShares2.42M
TypeSH
Market value$315.24M
2.00%
Sole
2.13M
Shared
0.00
None
289.44K
VISA INC
SOLEShares1.09M
TypeSH
Market value$259.07M
1.65%
Sole
942.87K
Shared
0.00
None
148.03K
NVIDIA CORPORATION
SOLEShares533.85K
TypeSH
Market value$225.83M
1.43%
Sole
469.57K
Shared
0.00
None
64.28K
BUILDERS FIRSTSOURCE INC
SOLEShares1.64M
TypeSH
Market value$223.45M
1.42%
Sole
1.45M
Shared
0.00
None
190.70K
FORTINET INC
SOLEShares2.86M
TypeSH
Market value$215.90M
1.37%
Sole
2.34M
Shared
0.00
None
518.25K
META PLATFORMS INC
SOLEShares724.50K
TypeSH
Market value$207.92M
1.32%
Sole
636.26K
Shared
0.00
None
88.24K
UNITEDHEALTH GROUP INC
SOLEShares425.71K
TypeSH
Market value$204.61M
1.30%
Sole
369.12K
Shared
0.00
None
56.59K
CHIPOTLE MEXICAN GRILL INC
SOLEShares91.80K
TypeSH
Market value$196.37M
1.25%
Sole
75.67K
Shared
0.00
None
16.13K
LILLY ELI & CO
SOLEShares396.95K
TypeSH
Market value$186.16M
1.18%
Sole
337.80K
Shared
0.00
None
59.16K
INSPIRE MED SYS INC
SOLEShares563.67K
TypeSH
Market value$182.99M
1.16%
Sole
505.45K
Shared
0.00
None
58.22K
SERVICENOW INC
SOLEShares311.40K
TypeSH
Market value$175.00M
1.11%
Sole
272.59K
Shared
0.00
None
38.81K
SAIA INC
SOLEShares506.74K
TypeSH
Market value$173.51M
1.10%
Sole
456K
Shared
0.00
None
50.74K
AMETEK INC
SOLEShares1.07M
TypeSH
Market value$173.50M
1.10%
Sole
867.85K
Shared
0.00
None
203.96K
HUBSPOT INC
SOLEShares318.94K
TypeSH
Market value$169.70M
1.08%
Sole
273.25K
Shared
0.00
None
45.69K
MASIMO CORP
SOLEShares953.80K
TypeSH
Market value$156.95M
1.00%
Sole
841.40K
Shared
0.00
None
112.40K
BIO RAD LABS INC
SOLEShares403.81K
TypeSH
Market value$153.09M
0.97%
Sole
362.37K
Shared
0.00
None
41.45K
LPL FINL HLDGS INC
SOLEShares650.45K
TypeSH
Market value$141.43M
0.90%
Sole
552.24K
Shared
0.00
None
98.20K
WESCO INTL INC
SOLEShares771.14K
TypeSH
Market value$138.08M
0.88%
Sole
643.31K
Shared
0.00
None
127.83K
SALESFORCE INC
SOLEShares643.46K
TypeSH
Market value$135.94M
0.86%
Sole
560.62K
Shared
0.00
None
82.84K
| Issuer | Class | Shares | Type | Value / Portfolio % | Voting — Sole | Shared | None |
|---|---|---|---|---|---|---|---|
APPLE INCSOLE | COM | 2.75M | SH | $532.65M 3.38% | 2.40M | 0.00 | 350.87K |
MICROSOFT CORPSOLE | COM | 1.38M | SH | $470.54M 2.99% | 1.18M | 0.00 | 201.57K |
ALPHABET INCSOLE | CAP STK CL A | 3.39M | SH | $405.74M 2.58% | 3M | 0.00 | 391.15K |
ICON PLCSOLE | SHS | 1.38M | SH | $344.64M 2.19% | 1.17M | 0.00 | 210.10K |
TRANSDIGM GROUP INCSOLE | COM | 363.80K | SH | $325.29M 2.07% | 303.67K | 0.00 | 60.12K |
ASCENDIS PHARMA A/SSOLE | SPONSORED ADR | 3.63M | SH | $324.13M 2.06% | 3.22M | 0.00 | 408.23K |
AMAZON COM INCSOLE | COM | 2.42M | SH | $315.24M 2.00% | 2.13M | 0.00 | 289.44K |
VISA INCSOLE | COM CL A | 1.09M | SH | $259.07M 1.65% | 942.87K | 0.00 | 148.03K |
NVIDIA CORPORATIONSOLE | COM | 533.85K | SH | $225.83M 1.43% | 469.57K | 0.00 | 64.28K |
BUILDERS FIRSTSOURCE INCSOLE | COM | 1.64M | SH | $223.45M 1.42% | 1.45M | 0.00 | 190.70K |
FORTINET INCSOLE | COM | 2.86M | SH | $215.90M 1.37% | 2.34M | 0.00 | 518.25K |
META PLATFORMS INCSOLE | CL A | 724.50K | SH | $207.92M 1.32% | 636.26K | 0.00 | 88.24K |
UNITEDHEALTH GROUP INCSOLE | COM | 425.71K | SH | $204.61M 1.30% | 369.12K | 0.00 | 56.59K |
CHIPOTLE MEXICAN GRILL INCSOLE | COM | 91.80K | SH | $196.37M 1.25% | 75.67K | 0.00 | 16.13K |
LILLY ELI & COSOLE | COM | 396.95K | SH | $186.16M 1.18% | 337.80K | 0.00 | 59.16K |
INSPIRE MED SYS INCSOLE | COM | 563.67K | SH | $182.99M 1.16% | 505.45K | 0.00 | 58.22K |
SERVICENOW INCSOLE | COM | 311.40K | SH | $175.00M 1.11% | 272.59K | 0.00 | 38.81K |
SAIA INCSOLE | COM | 506.74K | SH | $173.51M 1.10% | 456K | 0.00 | 50.74K |
AMETEK INCSOLE | COM | 1.07M | SH | $173.50M 1.10% | 867.85K | 0.00 | 203.96K |
HUBSPOT INCSOLE | COM | 318.94K | SH | $169.70M 1.08% | 273.25K | 0.00 | 45.69K |
MASIMO CORPSOLE | COM | 953.80K | SH | $156.95M 1.00% | 841.40K | 0.00 | 112.40K |
BIO RAD LABS INCSOLE | CL A | 403.81K | SH | $153.09M 0.97% | 362.37K | 0.00 | 41.45K |
LPL FINL HLDGS INCSOLE | COM | 650.45K | SH | $141.43M 0.90% | 552.24K | 0.00 | 98.20K |
WESCO INTL INCSOLE | COM | 771.14K | SH | $138.08M 0.88% | 643.31K | 0.00 | 127.83K |
SALESFORCE INCSOLE | COM | 643.46K | SH | $135.94M 0.86% | 560.62K | 0.00 | 82.84K |
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