Westfield Capital Management CO LP Portfolio Holdings

Westfield Capital Management CO LP

  • $21.9 Billion
  • Q3 2025

Westfield Capital Management CO LP has filed its 13F form on November 10, 2025 for Q3 2025 where it was disclosed a total value porftolio of $21.9 Billion distributed in 235 stocks.

Among their holdings, we can observe that their the top five positions include companies like: Nvidia Corp with a value of $1.21B, Ascendis Pharma A/S with a value of $1.05B, Microsoft Corp with a value of $883M, Apple Inc. with a value of $849M, and Comfort Systems Usa Inc with a value of $688M.

Examining the 13F form we can see an increase of $2.6B in the current position value, from $19.3B to 21.9B.

Westfield Capital Management CO LP is based out at Boston, MA

Below you can find more details about Westfield Capital Management CO LP portfolio as well as his latest detailed transactions.

Portfolio value $21.9 Billion
Technology: $7.05 Billion
Industrials: $4.12 Billion
Healthcare: $3.76 Billion
Communication Services: $2.19 Billion
Financial Services: $2.19 Billion
Consumer Cyclical: $2 Billion
Energy: $238 Million
Consumer Defensive: $156 Million
Other: $239 Million

Stock Holdings Table

Stock Market Cap. Holding Value (Reported) # of Shares. Last Trade Trade History
$465B
$1.21 Billion 5.53% of portfolio
6,507,165
Q3 2025 Reduced 11.31%
$11.4B
$1.05 Billion 4.77% of portfolio
5,259,909
Q3 2025 Reduced 4.0%
$3.78T
$883 Million 4.03% of portfolio
1,705,236
Q3 2025 Reduced 6.95%
$4.3T
$849 Million 3.87% of portfolio
3,334,545
Q3 2025 Reduced 1.96%
$32.5B
$688 Million 3.13% of portfolio
833,195
Q3 2025 Reduced 6.34%
$1.37T
$564 Million 2.57% of portfolio
767,657
Q3 2025 Reduced 14.57%
$2.39T
$558 Million 2.54% of portfolio
2,541,729
Q3 2025 Reduced 26.6%
$1.65T
$546 Million 2.49% of portfolio
2,244,650
Q3 2025 Reduced 35.12%
$39.4B
$523 Million 2.39% of portfolio
729,152
Q3 2025 Reduced 21.41%
$84.4B
$394 Million 1.8% of portfolio
2,007,453
Q3 2025 Added 76.86%
$139B
$385 Million 1.75% of portfolio
1,166,362
Q3 2025 Reduced 16.59%
$72.7B
$287 Million 1.31% of portfolio
217,897
Q3 2025 Reduced 31.08%
$24.5B
$277 Million 1.26% of portfolio
2,450,671
Q3 2025 Reduced 31.95%
$49.1B
$277 Million 1.26% of portfolio
230,648
Q3 2025 Added 7.83%
$4.16B
$242 Million 1.1% of portfolio
3,380,373
Q3 2025 Added 155.63%
$533B
$241 Million 1.1% of portfolio
705,767
Q3 2025 Reduced 21.96%
$73.7B
$220 Million 1.0% of portfolio
2,611,958
Q3 2025 New
$971B
$211 Million 0.96% of portfolio
277,005
Q3 2025 Added 6.97%
$7.94B
$209 Million 0.95% of portfolio
1,419,250
Q3 2025 Added 111.36%
$4.4B
$201 Million 0.92% of portfolio
2,132,489
Q3 2025 Added 42.05%
$5.07B
$199 Million 0.91% of portfolio
6,094,486
Q3 2025 Reduced 11.9%
$413B
$199 Million 0.91% of portfolio
3,861,103
Q3 2025 Added 15.45%
$73.2B
$196 Million 0.9% of portfolio
45,770
Q3 2025 New
$32.7B
$195 Million 0.89% of portfolio
2,247,218
Q3 2025 Reduced 5.48%
$29.6B
$191 Million 0.87% of portfolio
575,462
Q3 2025 Reduced 30.68%
$1.29T
$180 Million 0.82% of portfolio
404,220
Q3 2025 Reduced 14.85%
$9.13B
$175 Million 0.8% of portfolio
1,221,730
Q3 2025 Added 22.03%
$593B
$169 Million 0.77% of portfolio
600,197
Q3 2025 Reduced 14.1%
$55.8B
$165 Million 0.75% of portfolio
1,189,575
Q3 2025 New
$24.4B
$164 Million 0.75% of portfolio
1,027,589
Q3 2025 Reduced 8.94%
$8.6B
$163 Million 0.74% of portfolio
1,716,658
Q3 2025 Added 204.7%
$13.5B
$162 Million 0.74% of portfolio
3,345,780
Q3 2025 Added 14.95%
$4.52B
$156 Million 0.71% of portfolio
1,647,907
Q3 2025 Added 9.29%
$22.4B
$156 Million 0.71% of portfolio
2,312,210
Q3 2025 Reduced 5.54%
$5.71B
$148 Million 0.68% of portfolio
786,175
Q3 2025 New
$25.3B
$147 Million 0.67% of portfolio
1,751,558
Q3 2025 Added 12.43%
$4.19B
$142 Million 0.65% of portfolio
3,801,787
Q3 2025 Added 7.9%
$20B
$142 Million 0.65% of portfolio
1,675,282
Q3 2025 New
$7.02B
$134 Million 0.61% of portfolio
693,319
Q3 2025 Added 4.23%
$2.87B
$134 Million 0.61% of portfolio
3,732,715
Q3 2025 Added 73.2%
$1.46T
$131 Million 0.6% of portfolio
467,398
Q3 2025 Reduced 28.68%
$6.28B
$130 Million 0.59% of portfolio
947,308
Q3 2025 Added 161.16%
$82.2B
$130 Million 0.59% of portfolio
574,955
Q3 2025 New
$5.94B
$117 Million 0.54% of portfolio
2,513,967
Q3 2025 Added 136.26%
$10.3B
$112 Million 0.51% of portfolio
1,540,265
Q3 2025 Reduced 18.04%
$13.3B
$109 Million 0.5% of portfolio
2,341,336
Q3 2025 Added 10.55%
$342B
$111 Million 0.5% of portfolio
606,450
Q3 2025 Reduced 68.06%
$12B
$110 Million 0.5% of portfolio
1,102,488
Q3 2025 Reduced 1.36%
$64.5B
$109 Million 0.5% of portfolio
336,512
Q3 2025 New

Summary

  • Portfolio
  • No. of Stocks 235
  • Current Value $21.9 Billion
  • Prior Value $19.3 Billion
  • Filing
  • Period Q3 2025
  • Filing Date November 10, 2025
  • Form Type 13F-HR
  • Activity in Q3 2025
  • New Purchases 68 stocks
  • Additional Purchases 62 stocks
  • Sold out of 0 stocks
  • Reduced holdings in 95 stocks
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