Westfield Capital Management
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Westfield Capital Management’s Builders FirstSource BLDR Stock Holding History

Westfield Capital Management’s Portfolio BLDR Stock Details BLDR Fund Activity
Bought
Maintained
Sold
Quarter Market Value Status Shares Change in
Stake 		Trade Value Portfolio Weight Portfolio Position
2026
Q2 		$58.7M Buy
+656,421
New +$52.4M 0.19% 143
2026
Q1 		– Sell
-475,697
Closed -$48.9M – 258
2025
Q4 		$48.9M Sell
475,697
-140,335
-23% -$15.8M 0.2% 154
2025
Q3 		$74.7M Buy
+616,032
New +$81.7M 0.31% 89
2024
Q3 		– Sell
-7,920
Closed -$1.1M – 252
2024
Q2 		$1.1M Sell
7,920
-1,373,364
-99% -$233M 0.01% 227
2024
Q1 		$288M Sell
1,381,284
-35,327
-2% -$6.53M 1.51% 9
2023
Q4 		$236M Buy
1,416,611
+143,041
+11% +$19M 1.38% 10
2023
Q3 		$159M Sell
1,273,570
-369,416
-22% -$51M 1.08% 13
2023
Q2 		$223M Buy
1,642,986
+911,828
+125% +$101M 1.42% 10
2023
Q1 		$64.9M Buy
+731,158
New +$57.9M 0.46% 80
2018
Q3 		– Sell
-1,811,060
Closed -$33.1M – 254
2018
Q2 		$33.1M Buy
1,811,060
+125,091
+7% +$2.39M 0.25% 136
2018
Q1 		$33.5M Sell
1,685,969
-858,280
-34% -$18.2M 0.26% 126
2017
Q4 		$55.4M Sell
2,544,249
-106,560
-4% -$2.02M 0.42% 94
2017
Q3 		$47.7M Sell
2,650,809
-29,385
-1% -$474K 0.37% 102
2017
Q2 		$41.1M Sell
2,680,194
-143,975
-5% -$2.15M 0.35% 103
2017
Q1 		$42.1M Sell
2,824,169
-536,987
-16% -$6.94M 0.36% 95
2016
Q4 		$36.9M Buy
3,361,156
+164,200
+5% +$1.78M 0.32% 108
2016
Q3 		$36.8M Sell
3,196,956
-136,360
-4% -$1.72M 0.3% 112
2016
Q2 		$37.5M Buy
3,333,316
+330,935
+11% +$3.82M 0.31% 112
2016
Q1 		$33.8M Buy
3,002,381
+635,894
+27% +$5.51M 0.26% 125
2015
Q4 		$26.2M Buy
2,366,487
+211,737
+10% +$2.69M 0.18% 160
2015
Q3 		$27.3M Buy
2,154,750
+2,133,350
+9,969% +$30.3M 0.19% 145
2015
Q2 		$275K Buy
+21,400
New +$261K ﹤0.01% 277

Other funds holding BLDR

BlackRock
BlackRock New York $6.73T AUM 46.02% 1-Year Est. Return
Vanguard Capital Management
Vanguard Capital Management Malvern, Pennsylvania $4.68T AUM
State Street
State Street Boston, Massachusetts $3.37T AUM 44.26% 1-Year Est. Return
Vanguard Portfolio Management
Vanguard Portfolio Management Malvern, Pennsylvania $2.22T AUM
Capital International Investors
Capital International Investors Los Angeles, California $484B AUM 34.9% 1-Year Est. Return
Pictet Asset Management
Pictet Asset Management Carouge, Switzerland $105B AUM 38.07% 1-Year Est. Return
Wellington Management Group
Wellington Management Group Boston, Massachusetts $580B AUM 38.23% 1-Year Est. Return
Dimensional Fund Advisors
Dimensional Fund Advisors Austin, Texas $552B AUM 44.19% 1-Year Est. Return
Invesco
Invesco Atlanta, Georgia $1.26T AUM 61.52% 1-Year Est. Return
Geode Capital Management
Geode Capital Management Boston, Massachusetts $1.88T AUM 44.46% 1-Year Est. Return

Westfield Capital Management's BLDR Position: Q2 2026 in Review

Westfield Capital Management opened a new position in Builders FirstSource (BLDR) in Q2 2026: 656,421 shares worth $58.7M. The stake represents 0.19% of the portfolio and ranks #143 among its holdings. This is a return to the name: Westfield Capital Management previously reported a position in BLDR as recently as Q4 2025.

Westfield Capital Management first reported a position in BLDR in Q2 2015 and has held it in 22 quarters since. The position peaked at $288M in Q1 2024. 670 funds tracked by Wall St. Rank hold BLDR as of Q2 2026.

  • Westfield Capital Management held 656,421 shares of Builders FirstSource worth $58.7M as of Q2 2026.
  • Builders FirstSource was a new Westfield Capital Management position in Q2 2026.
  • Builders FirstSource made up 0.19% of Westfield Capital Management's portfolio in Q2 2026, its #143 holding.
  • Westfield Capital Management first reported a position in Builders FirstSource in Q2 2015 and has held it in 22 quarters since.
  • Westfield Capital Management's Builders FirstSource position peaked at $288M in Q1 2024.
  • 670 funds tracked by Wall St. Rank held Builders FirstSource as of Q2 2026.

Based on Westfield Capital Management's 13F filing for Q2 2026, filed 12 Aug 2026.