13FBOX
BUILDERS FIRSTSOURCE INC · 13F Institutional Holdings
Options Calculator Rankings
B

BUILDERS FIRSTSOURCE INC

BLDR
Institutions
4
Combined AUM (Q2 2026)
$27.0M
Combined Shares (Q2 2026)
302,100
Overall Trend
Increase
All institutions combined
📥 Inflow (Q1 2026→Q2 2026)
+48,100
4 · 1 New Buys · ≈
📤 Outflow (Q1 2026→Q2 2026)
-3,800
2 · 2 Exit · ≈
⚖️ Net
+44,300
Net Buy
💰 Net Value
≈ —
est. price
Latest AUM (Q2 2026)
$27.0M
Institutions
4
New Buys
1
Adds
3
Reduces
0
Exits
2
Unchanged
0
Ownership TrendPortfolio %Prev Q %RankQ2 2026 ValueQ2 2026 SharesPrev Q ValuePrev Q SharesShares ChangeAction
IMC-Chicago, LLC
<0.01%0.01%#2$18.0M201,300$16.2M196,700+4,600+2.34%Add
GROUP ONE TRADING LLC
0.01%0.01%#1$4.9M54,300$3.0M36,800+17,500+47.55%Add
SIMPLEX TRADING, LLC
<0.01%<0.01%#4$4.1M46,000$1.7M20,500+25,500+124.39%Add
SUMMIT SECURITIES GROUP LLC
<0.01%#3$44,740500$00+500New Buy

🧭 Institutional Sector Flow Heatmap

Net Outflow Net Inflow