Jane Street
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Jane Street’s Builders FirstSource BLDR Stock Holding History

Jane Street’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 		$481K Buy
+5,378
New +$430K ﹤0.01% 8112
2026
Q1 		– Sell
-205,565
Closed -$22M – 11614
2025
Q4 		$21.2M Buy
205,565
+177,480
+632% +$19.9M ﹤0.01% 1578
2025
Q3 		$3.41M Sell
28,085
-8,183
-23% -$1.09M ﹤0.01% 4017
2025
Q2 		$4.23M Sell
36,268
-54,870
-60% -$6.33M ﹤0.01% 3238
2025
Q1 		$11.4M Sell
91,138
-116,672
-56% -$17M ﹤0.01% 1834
2024
Q4 		$29.7M Buy
207,810
+62,443
+43% +$11M 0.01% 984
2024
Q3 		$28.2M Sell
145,367
-84,306
-37% -$14M 0.01% 1015
2024
Q2 		$31.8M Buy
229,673
+142,857
+165% +$24.3M 0.01% 944
2024
Q1 		$18.1M Sell
86,816
-502,065
-85% -$92.8M ﹤0.01% 1276
2023
Q4 		$98.3M Buy
588,881
+140,108
+31% +$18.6M 0.03% 392
2023
Q3 		$55.9M Buy
448,773
+294,939
+192% +$40.7M 0.02% 510
2023
Q2 		$20.9M Buy
153,834
+2,775
+2% +$309K 0.01% 1165
2023
Q1 		$13.4M Buy
151,059
+144,984
+2,387% +$11.5M 0.01% 1341
2022
Q4 		$394K Sell
6,075
-391,773
-98% -$24.5M ﹤0.01% 6555
2022
Q3 		$23.4M Buy
397,848
+106,704
+37% +$6.67M 0.01% 941
2022
Q2 		$15.6M Buy
291,144
+134,865
+86% +$8.27M 0.01% 1325
2022
Q1 		$10.1M Buy
156,279
+106,911
+217% +$7.76M ﹤0.01% 1974
2021
Q4 		$4.23M Buy
49,368
+42,599
+629% +$2.89M ﹤0.01% 3114
2021
Q3 		$350K Sell
6,769
-440,183
-98% -$21.5M ﹤0.01% 7889
2021
Q2 		$19.1M Buy
446,952
+287,808
+181% +$13.3M 0.01% 1105
2021
Q1 		$7.38M Buy
159,144
+153,904
+2,937% +$6.55M ﹤0.01% 1893
2020
Q4 		$214K Sell
5,240
-5,662
-52% -$201K ﹤0.01% 6865
2020
Q3 		$356K Buy
+10,902
New +$296K ﹤0.01% 5640
2020
Q2 		– Sell
-11,901
Closed -$215K – 7059
2020
Q1 		$146K Buy
+11,901
New +$269K ﹤0.01% 4789
2017
Q4 		– Sell
-51,349
Closed -$924K – 4569
2017
Q3 		$924K Buy
+51,349
New +$828K ﹤0.01% 2381
2015
Q4 		– Sell
-29,910
Closed -$379K – 3993
2015
Q3 		$379K Buy
+29,910
New +$425K ﹤0.01% 2566

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

Jane Street's BLDR Position: Q2 2026 in Review

Jane Street opened a new position in Builders FirstSource (BLDR) in Q2 2026: 5,378 shares worth $481K. The stake represents ﹤0.01% of the portfolio and ranks #8112 among its holdings. This is a return to the name: Jane Street previously reported a position in BLDR as recently as Q4 2025.

Jane Street first reported a position in BLDR in Q3 2015 and has held it in 26 quarters since. The position peaked at $98.3M in Q4 2023. 671 funds tracked by Wall St. Rank hold BLDR as of Q2 2026.

  • Jane Street held 5,378 shares of Builders FirstSource worth $481K as of Q2 2026.
  • Builders FirstSource was a new Jane Street position in Q2 2026.
  • Builders FirstSource made up ﹤0.01% of Jane Street's portfolio in Q2 2026, its #8112 holding.
  • Jane Street first reported a position in Builders FirstSource in Q3 2015 and has held it in 26 quarters since.
  • Jane Street's Builders FirstSource position peaked at $98.3M in Q4 2023.
  • 671 funds tracked by Wall St. Rank held Builders FirstSource as of Q2 2026.

Based on Jane Street's 13F filing for Q2 2026, filed 14 Aug 2026.