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 		$37.2M Buy
415,300
+101,200
+32% +$8.08M ﹤0.01% 1630
2026
Q1 		$25.9M Buy
314,100
+218,900
+230% +$23.4M ﹤0.01% 1558
2025
Q4 		$9.8M Sell
95,200
-7,400
-7% -$832K ﹤0.01% 2345
2025
Q3 		$12.4M Sell
102,600
-15,300
-13% -$2.03M ﹤0.01% 2143
2025
Q2 		$13.8M Sell
117,900
-30,000
-20% -$3.46M ﹤0.01% 1804
2025
Q1 		$18.5M Buy
147,900
+86,500
+141% +$12.6M ﹤0.01% 1377
2024
Q4 		$8.78M Sell
61,400
-23,500
-28% -$4.16M ﹤0.01% 2015
2024
Q3 		$16.5M Buy
84,900
+6,200
+8% +$1.03M ﹤0.01% 1403
2024
Q2 		$10.9M Buy
78,700
+7,000
+10% +$1.19M ﹤0.01% 1949
2024
Q1 		$15M Sell
71,700
-64,300
-47% -$11.9M ﹤0.01% 1433
2023
Q4 		$22.7M Sell
136,000
-48,400
-26% -$6.43M 0.01% 1167
2023
Q3 		$23M Buy
184,400
+76,700
+71% +$10.6M 0.01% 1000
2023
Q2 		$14.6M Buy
107,700
+60,000
+126% +$6.67M ﹤0.01% 1510
2023
Q1 		$4.23M Sell
47,700
-48,700
-51% -$3.86M ﹤0.01% 2680
2022
Q4 		$6.25M Sell
96,400
-49,800
-34% -$3.11M ﹤0.01% 2187
2022
Q3 		$8.61M Buy
146,200
+36,600
+33% +$2.29M ﹤0.01% 1851
2022
Q2 		$5.89M Sell
109,600
-37,900
-26% -$2.32M ﹤0.01% 2429
2022
Q1 		$9.52M Sell
147,500
-130,400
-47% -$9.47M ﹤0.01% 2058
2021
Q4 		$23.8M Sell
277,900
-183,600
-40% -$12.4M 0.01% 1062
2021
Q3 		$23.9M Buy
461,500
+234,600
+103% +$11.5M 0.01% 1018
2021
Q2 		$9.68M Buy
226,900
+24,200
+12% +$1.12M ﹤0.01% 1752
2021
Q1 		$9.4M Buy
202,700
+153,200
+309% +$6.52M ﹤0.01% 1610
2020
Q4 		$2.02M Sell
49,500
-11,300
-19% -$400K ﹤0.01% 3466
2020
Q3 		$1.98M Buy
60,800
+47,300
+350% +$1.28M ﹤0.01% 3051
2020
Q2 		$279K Buy
+13,500
New +$244K ﹤0.01% 5939
2017
Q3 		– Sell
-20,000
Closed -$306K – 4448
2017
Q2 		$306K Hold
20,000
– – ﹤0.01% 3575
2017
Q1 		$298K Buy
+20,000
New +$259K ﹤0.01% 3450

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.