Generalist · Boston, MA
Westfield Capital Management CO
Q1 2026 · compared with Q4 2025
Filed as Westfield Capital Management CO LP
- Software
- $2.4B
- Weight of 13F
- 9.9%
- Names
- 25
- Net bought
- −$51.5M
250 positions in the whole 13F.
Quarters on file
Each quarter on file, back to June 2016 when the filing exists. Net bought is the share change from the previous quarter at that quarter’s close. A split that leaves the dollar value in place counts as flat.
- Q2 202623 names$2.9B+$95.5M
- Q1 202625 names$2.4B−$51.5M
- Q4 202528 names$3.1B+$1.2B
- Q3 202530 names$3.3B−$113M
- Q2 202535 names$3.5B−$447M
- Q1 202532 names$3.4B−$149M
- Q4 202433 names$4.0B−$236M
- Q3 202432 names$3.8B−$165M
- Q2 202434 names$3.7B+$530M
- Q1 202434 names$3.4B+$81.4M
- Q4 202330 names$3.0B+$89.9M
- Q3 202334 names$2.5B−$139M
- Q2 202329 names$2.7B+$181M
- Q1 202327 names$2.3B−$143M
- Q4 202229 names$2.0B+$220M
- Q3 202228 names$1.9B+$173M
- Q2 202226 names$1.8B+$914M
- Q1 202228 names$2.4B+$259M
- Q4 202129 names$2.5B−$18.9M
- Q3 202124 names$2.4B+$62.8M
- Q2 202122 names$2.2B−$98.3M
- Q1 202125 names$2.1B−$112M
- Q4 202023 names$2.2B−$171M
- Q3 202023 names$2.1B−$147M
- Q2 202020 names$2.0B−$59.7M
- Q1 202023 names$1.5B+$182M
- Q4 201919 names$1.6B−$70.2M
- Q3 201919 names$1.5B−$68.2M
- Q2 201920 names$1.5B−$38.0M
- Q1 201923 names$1.5B−$7.7M
- Q4 201821 names$1.2B+$53.8M
- Q3 201817 names$1.4B−$24.7M
- Q2 201816 names$1.2B−$37.3M
- Q1 201815 names$1.1B−$9.6M
- Q4 201712 names$982M−$71.6M
- Q3 201714 names$950M+$65.9M
- Q2 201715 names$827M−$78.2M
- Q1 201712 names$832M−$165M
- Q4 201612 names$896M−$50.7M
- Q3 201610 names$1.0B−$11.9M
- Q2 201612 names$911M—
What moved the book
The five software lines with the largest share change this quarter.
Software held
- MicrosoftMSFT1,649,513 shares · 26.0% of their software · price −$187M$611M+$13.7M
- SamsaraIOT5,072,821 shares · 6.8% of their software · price −$19.1M$161M+$39.7M
- DynatraceDT4,209,594 shares · 6.6% of their software · price −$26.8M$156M+$37.0M
- ServiceNowNOW1,394,187 shares · 6.2% of their software · price −$67.8M$146M−$12.7M
- CloudflareNET541,566 shares · 4.7% of their software · price +$5.0M$112M+$4.4M
- SnowflakeSNOW718,810 shares · 4.6% of their software · price −$49.3M$108M+$15.3M
- Palo Alto NetworksPANW636,483 shares · 4.3% of their software · price −$15.2M$102M+$34.6M
- PalantirPLTR674,557 shares · 4.2% of their software · price −$21.2M$98.7M+$92.4M
- BrazeBRZE3,973,906 shares · 4.0% of their software · price −$42.4M$93.8M+$61.3M
- F5, Inc.FFIV298,542 shares · 3.7% of their software · price +$10.2M$86.4M+$4.4M
- Calix, Inc.CALX1,546,101 shares · 3.2% of their software · price −$6.1M$75.7M+$21.2M
- GuidewireGWRE486,581 shares · 3.1% of their software · price −$25.0M$72.8MNew · +$97.8M
- ZscalerZS427,919 shares · 2.6% of their software · price −$36.2M$60.0M+$33.1M
- DescartesDSGX801,902 shares · 2.4% of their software · price −$12.9M$57.4M−$34.4M
- ProcorePCOR1,001,253 shares · 2.4% of their software · price −$15.8M$57.1M−$7.6M
- HubSpotHUBS232,976 shares · 2.4% of their software · price −$36.6M$56.9M−$47.8M
- SynopsysSNPS132,848 shares · 2.2% of their software · price −$9.7M$52.7M+$5.3M
- SalesforceCRM271,963 shares · 2.2% of their software · price −$21.3M$50.8M+$24.8M
- ToastTOST1,790,873 shares · 2.0% of their software · price −$16.1M$47.5M+$18.6M
- Fair IsaacFICO39,934 shares · 1.8% of their software · price −$24.9M$42.6M−$7.9M
- Corpay, Inc.CPAY143,120 shares · 1.8% of their software · price −$1.4M$41.6MNew · +$43.1M
- MongoDBMDB164,881 shares · 1.7% of their software · price −$28.8M$40.4M+$2.2M
- Core Scientific, Inc.CORZ1,480,013 shares · 0.9% of their software · price +$592K$22.1M+$1.3M
- monday.comMNDY13,370 shares · 0.0% of their software · price −$1.0M$924KFlat
- AppLovinAPP1,260 shares · 0.0% of their software$501KFlat
