Simplex Trading’s Builders FirstSource BLDR Stock Holding History

Bought
Maintained
Sold
Quarter Market Value Status Shares Change in
Stake
Trade Value Portfolio Weight Portfolio Position
2026
Q1
$2.21M Sell
26,900
-13,500
-33% -$1.44M ﹤0.01% 1743
2025
Q4
$4.16M Sell
40,400
-16,300
-29% -$1.83M ﹤0.01% 1429
2025
Q3
$6.87M Sell
56,700
-33,300
-37% -$4.42M ﹤0.01% 1202
2025
Q2
$10.5M Buy
90,000
+52,800
+142% +$6.09M 0.01% 861
2025
Q1
$4.65M Sell
37,200
-33,800
-48% -$4.92M ﹤0.01% 1359
2024
Q4
$10.1M Sell
71,000
-15,700
-18% -$2.78M 0.01% 1025
2024
Q3
$16.8M Sell
86,700
-8,700
-9% -$1.44M 0.01% 737
2024
Q2
$13.2M Sell
95,400
-10,000
-9% -$1.7M 0.01% 840
2024
Q1
$22M Sell
105,400
-79,800
-43% -$14.7M 0.01% 652
2023
Q4
$30.9M Sell
185,200
-4,800
-3% -$638K 0.02% 516
2023
Q3
$23.7M Buy
190,000
+13,100
+7% +$1.81M 0.02% 522
2023
Q2
$24.1M Sell
176,900
-95,100
-35% -$10.6M 0.02% 506
2023
Q1
$24.1M Buy
272,000
+161,400
+146% +$12.8M 0.02% 515
2022
Q4
$7.17M Sell
110,600
-13,700
-11% -$856K 0.01% 1019
2022
Q3
$7.32M Sell
124,300
-29,200
-19% -$1.83M 0.01% 947
2022
Q2
$8.24M Buy
153,500
+19,200
+14% +$1.18M 0.01% 889
2022
Q1
$8.67M Buy
134,300
+30,500
+29% +$2.21M 0.01% 905
2021
Q4
$8.9M Sell
103,800
-36,900
-26% -$2.5M 0.01% 845
2021
Q3
$6.14M Buy
140,700
+400
+0.3% +$19.5K 0.01% 1034
2021
Q2
$5.99M Buy
140,300
+140,220
+175,275% +$6.5M 0.01% 1035
2021
Q1
$370K Sell
80
-59
-42% -$2.51K ﹤0.01% 3836
2020
Q4
$567K Sell
139
-19
-12% -$673 ﹤0.01% 3257
2020
Q3
$515K Buy
158
+136
+618% +$3.69K ﹤0.01% 2967
2020
Q2
$45K Sell
22
-54
-71% -$976 ﹤0.01% 5580
2020
Q1
$92K Sell
76
-104
-58% -$2.35K ﹤0.01% 4459
2019
Q4
$457K Buy
180
+127
+240% +$3.04K ﹤0.01% 2836
2019
Q3
$109K Buy
53
+18
+51% +$336 ﹤0.01% 4231
2019
Q2
$59K Buy
35
+27
+338% +$404 ﹤0.01% 4712
2019
Q1
$10K Sell
8
-7
-47% -$92 ﹤0.01% 6140
2018
Q4
$16K Sell
15
-41
-73% -$515 ﹤0.01% 5499
2018
Q3
$82K Buy
56
+8
+17% +$136 ﹤0.01% 4639
2018
Q2
$87K Sell
48
-14
-23% -$268 ﹤0.01% 4443
2018
Q1
$18K Buy
+62
New +$1.31K ﹤0.01% 3452
2017
Q2
Sell
-79
Closed -$2K 6093
2017
Q1
$2K Sell
79
-213
-73% -$2.75K ﹤0.01% 5199
2016
Q4
$63K Sell
292
-6
-2% -$65 ﹤0.01% 1929
2016
Q3
$67K Buy
+298
New +$3.75K ﹤0.01% 1851
2016
Q2
Sell
-66
Closed -$10K 5813
2016
Q1
$10K Buy
66
+56
+560% +$485 ﹤0.01% 3438
2015
Q4
$4K Sell
10
-41
-80% -$521 ﹤0.01% 3993
2015
Q3
$12K Buy
+51
New +$724 ﹤0.01% 3254

Other funds holding BLDR

Simplex Trading's BLDR Position: Q1 2026 in Review

Simplex Trading increased its Builders FirstSource (BLDR) stake by 25% in Q1 2026, buying an estimated $418K and bringing the position to 19,773 shares worth $1.63M. The position accounts for ﹤0.01% of the portfolio, ranked #2014.

Simplex Trading first reported a position in BLDR in Q3 2015 and has held it in 30 quarters since. The position peaked at $2.9M in Q3 2025. 719 funds tracked by Wall St. Rank hold BLDR as of Q1 2026.

  • Simplex Trading held 19,773 shares of Builders FirstSource worth $1.63M as of Q1 2026.
  • Simplex Trading bought 3,913 Builders FirstSource shares in Q1 2026, an estimated $418K.
  • Builders FirstSource made up ﹤0.01% of Simplex Trading's portfolio in Q1 2026, its #2014 holding.
  • Simplex Trading first reported a position in Builders FirstSource in Q3 2015 and has held it in 30 quarters since.
  • Simplex Trading's Builders FirstSource position peaked at $2.9M in Q3 2025.
  • 719 funds tracked by Wall St. Rank held Builders FirstSource as of Q1 2026.

Based on Simplex Trading's 13F filing for Q1 2026, filed 14 May 2026.