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Builders FirstSource

719 hedge funds and large institutions have $8.74B invested in Builders FirstSource in 2026 Q1 according to their latest regulatory filings, with 104 funds opening new positions, 274 increasing their positions, 239 reducing their positions, and 135 closing their positions.

New
Increased
Maintained
Reduced
Closed

61% more call options, than puts

Call options by funds: $178M | Put options by funds: $111M

15% more repeat investments, than reductions

Existing positions increased: 274 | Existing positions reduced: 239

0.85% more ownership

Funds ownership: 95.09%95.93% (+0.85%)

0% more funds holding in top 10

Funds holding in top 10: 1313 (0)

6% less funds holding

Funds holding: 765719 (-46)

19% less capital invested

Capital invested by funds: $10.8B → $8.74B (-$2.09B)

23% less first-time investments, than exits

New positions opened: 104 | Existing positions closed: 135

Holders
719
Holders Change
-46
Holders Change %
-6.01%
% of All Funds
8.86%
Holding in Top 10
13
Holding in Top 10 Change
Holding in Top 10 Change %
% of All Funds
0.16%
New
104
Increased
274
Reduced
239
Closed
135
Calls
$178M
Puts
$111M
Net Calls
+$67.3M
Net Calls Change
+$65M
Name Holding Trade Value Shares
Change
Change in
Stake
RP
126
RIHO Partners
Arizona
$8.18M +$1.43M +13,349 +16%
IMRF
127
Illinois Municipal Retirement Fund
Illinois
$8.18M -$1.79M -16,722 -14%
MPM
128
Mountaineer Partners Management
New York
$8.09M +$439K +4,112 +4%
AIM
129
Achmea Investment Management
Netherlands
$8.07M -$21.3K -199 -0.2%
IHL
130
Investment House LLC
California
$7.9M +$6.6M +61,829 +181%
TCAM
131
Turtle Creek Asset Management
Ontario, Canada
$7.82M +$2.92M +27,350 +40%
Rafferty Asset Management
132
Rafferty Asset Management
New York
$7.69M -$2M -18,711 -17%
GC
133
Giverny Capital
Quebec, Canada
$7.56M +$195K +1,829 +2%
PL
134
Parkwood LLC
Ohio
$7.53M +$570K +5,340 +6%
State of Wisconsin Investment Board
135
State of Wisconsin Investment Board
Wisconsin
$7.46M +$1.82M +17,038 +23%
Robeco Institutional Asset Management
136
Robeco Institutional Asset Management
Netherlands
$7.34M +$3.4M +31,794 +55%
New York State Teachers Retirement System (NYSTRS)
137
New York State Teachers Retirement System (NYSTRS)
New York
$7.27M -$107K -1,006 -1%
PCMI
138
Paradigm Capital Management Inc
New York
$7.06M
DLP
139
De Lisle Partners
United Kingdom
$6.96M
WCM
140
Wedge Capital Management
North Carolina
$6.93M +$1.88M +17,618 +26%
WT
141
Whittier Trust
California
$6.8M -$2.97M -27,797 -25%
Aviva
142
Aviva
United Kingdom
$6.7M -$200K -1,872 -2%
Thrivent Financial for Lutherans
143
Thrivent Financial for Lutherans
Minnesota
$6.62M +$272K +2,545 +3%
Manulife (Manufacturers Life Insurance)
144
Manulife (Manufacturers Life Insurance)
Ontario, Canada
$6.59M +$283K +2,648 +3%
6CM
145
683 Capital Management
New York
$6.59M +$4.7M +44,000 +122%
OSAM
146
O'Shaughnessy Asset Management
Connecticut
$6.38M -$1.08M -10,137 -12%
AF
147
Atlas FRM
Connecticut
$6.34M +$8.22M +77,000 New
Russell Investments Group
148
Russell Investments Group
United Kingdom
$6.05M -$2.49M -23,325 -24%
RA
149
Royce & Associates
New York
$6.02M
MLL
150
Moody Lynn & Lieberson
Massachusetts
$5.94M +$3.28M +30,678 +74%