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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
Natixis Advisors
251
Natixis Advisors
Massachusetts
$1.88M
Mirae Asset Global Investments
252
Mirae Asset Global Investments
South Korea
$1.88M
IC
253
Inkwell Capital
Florida
$1.86M
RWM
254
Ritholtz Wealth Management
New York
$1.86M
SWP
255
Stratos Wealth Partners
Ohio
$1.84M
LAM
256
LECAP Asset Management
United Kingdom
$1.84M
LOAMS
257
Lombard Odier Asset Management (Switzerland)
Switzerland
$1.83M
KIA
258
KCM Investment Advisors
California
$1.82M
SAM
259
SEB Asset Management
$1.8M
VOYA Investment Management
260
VOYA Investment Management
Georgia
$1.79M
Swedbank
261
Swedbank
Sweden
$1.78M
Janney Montgomery Scott
262
Janney Montgomery Scott
Pennsylvania
$1.78M
EP
263
Edgestream Partners
New Jersey
$1.75M
II
264
Inspire Investing
Idaho
$1.75M
OAM
265
OP Asset Management
$1.71M
Baird Financial Group
266
Baird Financial Group
Wisconsin
$1.69M
AssetMark Inc
267
AssetMark Inc
California
$1.67M
CIA
268
Capital Investment Advisors
Georgia
$1.67M
ProShare Advisors
269
ProShare Advisors
Maryland
$1.66M
AB
270
Amalgamated Bank
New York
$1.65M
IAM
271
Impala Asset Management
Florida
$1.65M
II
272
IFM Investors
Australia
$1.64M
Simplex Trading
273
Simplex Trading
Illinois
$1.63M
MM
274
Marnell Management
Michigan
$1.63M
MCM
275
Monimus Capital Management
New Jersey
$1.62M