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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

more call options, than puts

Call options by funds: $ | Put options by funds: $

more repeat investments, than reductions

Existing positions increased: | Existing positions reduced:

more ownership

Funds ownership:

more funds holding in top 10

Funds holding in top 10:

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
Holders Change %
% of All Funds
Holding in Top 10
13
Holding in Top 10 Change
Holding in Top 10 Change %
% of All Funds
New
Increased
Reduced
Closed
Calls
$178M
Puts
$111M
Net Calls
Net Calls Change

Top Sellers

1 -$236M
2 -$180M
3 -$175M
4
Citadel Advisors
Citadel Advisors
Florida
-$79.4M
5
AssetMark Inc
AssetMark Inc
California
-$61.2M
Name Holding Trade Value Shares
Change
Change in
Stake
DekaBank Deutsche Girozentrale
176
DekaBank Deutsche Girozentrale
Germany
$4.38M
WIA
177
Westbourne Investment Advisors
Maryland
$4.32M
VIA
178
Vanguard Investments Australia
Australia
$4.23M
SG Americas Securities
179
SG Americas Securities
New York
$4.16M
Canada Life
180
Canada Life
Manitoba, Canada
$4.11M
Nomura Asset Management
181
Nomura Asset Management
Japan
$3.99M
AWG
182
Altus Wealth Group
Colorado
$3.96M
DIS
183
Diversified Investment Strategies
Louisiana
$3.92M
Asset Management One
184
Asset Management One
Japan
$3.91M
DIA
185
Dana Investment Advisors
Wisconsin
$3.9M
Treasurer of the State of North Carolina
186
Treasurer of the State of North Carolina
North Carolina
$3.82M
Commonwealth Equity Services
187
Commonwealth Equity Services
Massachusetts
$3.8M
BT
188
Banque Transatlantique
France
$3.77M
TRSOTSOK
189
Teachers Retirement System of the State of Kentucky
Kentucky
$3.74M
Mitsubishi UFJ Trust & Banking
190
Mitsubishi UFJ Trust & Banking
Japan
$3.69M
WTC
191
WhitTier Trust Company
Nevada
$3.65M
BHCM
192
Brevan Howard Capital Management
Jersey
$3.62M
OWIM
193
Old West Investment Management
California
$3.48M
Cetera Investment Advisers
194
Cetera Investment Advisers
Illinois
$3.39M
CBU
195
CIBC Bancorp USA
Illinois
$3.38M
Healthcare of Ontario Pension Plan (HOOPP) Trust Fund
196
Healthcare of Ontario Pension Plan (HOOPP) Trust Fund
Ontario, Canada
$3.35M
Hudson Bay Capital Management
197
Hudson Bay Capital Management
Connecticut
$3.32M
MML Investors Services
198
MML Investors Services
Massachusetts
$3.31M
OCM
199
Occam Crest Management
Connecticut
$3.25M
KK
200
KLP Kapitalforvaltning
Norway
$3.12M