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
$1.69M Sell
20,500
-11,700
-36% -$1.25M ﹤0.01% 1981
2025
Q4
$3.31M Sell
32,200
-4,300
-12% -$483K ﹤0.01% 1585
2025
Q3
$4.42M Sell
36,500
-6,200
-15% -$823K ﹤0.01% 1588
2025
Q2
$4.98M Buy
42,700
+21,300
+100% +$2.46M ﹤0.01% 1343
2025
Q1
$2.67M Sell
21,400
-47,900
-69% -$6.97M ﹤0.01% 1772
2024
Q4
$9.9M Sell
69,300
-1,400
-2% -$248K 0.01% 1040
2024
Q3
$13.7M Sell
70,700
-36,500
-34% -$6.05M 0.01% 842
2024
Q2
$14.8M Buy
107,200
+27,600
+35% +$4.69M 0.01% 770
2024
Q1
$16.6M Sell
79,600
-69,900
-47% -$12.9M 0.01% 810
2023
Q4
$25M Sell
149,500
-51,800
-26% -$6.88M 0.02% 624
2023
Q3
$25.1M Buy
201,300
+37,000
+23% +$5.1M 0.02% 488
2023
Q2
$22.3M Buy
164,300
+100,400
+157% +$11.2M 0.02% 535
2023
Q1
$5.67M Buy
63,900
+16,500
+35% +$1.31M 0.01% 1222
2022
Q4
$3.08M Buy
47,400
+24,500
+107% +$1.53M ﹤0.01% 1546
2022
Q3
$1.35M Sell
22,900
-5,400
-19% -$338K ﹤0.01% 2329
2022
Q2
$1.52M Sell
28,300
-13,100
-32% -$803K ﹤0.01% 2157
2022
Q1
$2.67M Sell
41,400
-21,000
-34% -$1.52M ﹤0.01% 1802
2021
Q4
$5.35M Sell
62,400
-58,200
-48% -$3.94M 0.01% 1162
2021
Q3
$5.27M Sell
120,600
-2,400
-2% -$117K ﹤0.01% 1159
2021
Q2
$5.25M Buy
123,000
+122,522
+25,632% +$5.68M 0.01% 1145
2021
Q1
$2.22M Buy
478
+232
+94% +$9.88K ﹤0.01% 1500
2020
Q4
$1M Sell
246
-85
-26% -$3.01K ﹤0.01% 2562
2020
Q3
$1.08M Buy
331
+176
+114% +$4.78K ﹤0.01% 2152
2020
Q2
$320K Sell
155
-53
-25% -$957 ﹤0.01% 3448
2020
Q1
$254K Sell
208
-50
-19% -$1.13K ﹤0.01% 3313
2019
Q4
$655K Buy
258
+169
+190% +$4.04K ﹤0.01% 2477
2019
Q3
$183K Sell
89
-104
-54% -$1.94K ﹤0.01% 3649
2019
Q2
$325K Buy
193
+160
+485% +$2.39K ﹤0.01% 2988
2019
Q1
$44K Sell
33
-42
-56% -$552 ﹤0.01% 5106
2018
Q4
$81K Buy
75
+49
+188% +$616 ﹤0.01% 4046
2018
Q3
$38K Sell
26
-38
-59% -$644 ﹤0.01% 5419
2018
Q2
$117K Sell
64
-9
-12% -$172 ﹤0.01% 4101
2018
Q1
$18K Sell
73
-28
-28% -$593 ﹤0.01% 3451
2017
Q4
$30K Buy
101
+56
+124% +$1.06K ﹤0.01% 2917
2017
Q3
$8K Sell
45
-156
-78% -$2.52K ﹤0.01% 3950
2017
Q2
$16K Sell
201
-374
-65% -$5.59K ﹤0.01% 3509
2017
Q1
$163K Buy
575
+127
+28% +$1.64K 0.01% 1367
2016
Q4
$10K Buy
448
+20
+5% +$217 ﹤0.01% 3716
2016
Q3
$26K Buy
428
+121
+39% +$1.52K ﹤0.01% 2696
2016
Q2
$12K Buy
307
+184
+150% +$2.12K ﹤0.01% 3398
2016
Q1
$27K Buy
+123
New +$1.06K ﹤0.01% 2503
2015
Q4
Sell
-89
Closed -$2K 5399
2015
Q3
$2K Buy
89
+25
+39% +$355 ﹤0.01% 4584
2015
Q2
$50K Buy
+64
New +$781 ﹤0.01% 1698

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.