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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
GC
301
Grange Capital
Oregon
$1.32M
Luther King Capital Management (LKCM)
302
Luther King Capital Management (LKCM)
Texas
$1.3M
Ensign Peak Advisors
303
Ensign Peak Advisors
Utah
$1.3M
RIM
304
Rakuten Investment Management
Japan
$1.29M
Pathstone Holdings
305
Pathstone Holdings
New Jersey
$1.28M
NIM
306
NEOS Investment Management
Connecticut
$1.26M
BCIM
307
British Columbia Investment Management
British Columbia, Canada
$1.25M
YCM
308
Yousif Capital Management
Michigan
$1.24M
N
309
Numerai
California
$1.24M
SM
310
Soapstone Management
Maryland
$1.23M
P
311
&Partners
Tennessee
$1.23M
SLAM
312
Swiss Life Asset Management
$1.21M
National Pension Service
313
National Pension Service
South Korea
$1.19M
SC
314
Shay Capital
New York
$1.19M
NAM
315
Nissay Asset Management
Japan
$1.17M
HW
316
Hancock Whitney
Mississippi
$1.17M
CCP
317
Cunning Capital Partners
North Carolina
$1.15M
GCP
318
GSA Capital Partners
United Kingdom
$1.15M
State of Tennessee, Department of Treasury
319
State of Tennessee, Department of Treasury
Tennessee
$1.14M
STA
320
Summit Trail Advisors
New York
$1.12M
CLA
321
Carnegie Lake Advisors
New Jersey
$1.12M
William Blair & Company
322
William Blair & Company
Illinois
$1.11M
SMDAM
323
Sumitomo Mitsui DS Asset Management
Japan
$1.1M
Nordea Investment Management
324
Nordea Investment Management
Sweden
$1.09M
PP
325
PensionDanmark Pensionsforsikringsaktieselskab
Denmark
$1.07M