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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
RC
76
RBF Capital
California
$21.3M
Mitsubishi UFJ Asset Management
77
Mitsubishi UFJ Asset Management
Japan
$20.3M
VGA
78
Vanguard Global Advisers
Pennsylvania
$20M
MCM
79
Moore Capital Management
New York
$19.9M
Balyasny Asset Management
80
Balyasny Asset Management
Illinois
$19.4M
LPL Financial
81
LPL Financial
California
$19.1M
Verition Fund Management
82
Verition Fund Management
Connecticut
$18.8M
SAIG
83
Semper Augustus Investments Group
Colorado
$18.8M
RhumbLine Advisers
84
RhumbLine Advisers
Massachusetts
$18.4M
Renaissance Technologies
85
Renaissance Technologies
New York
$18.1M
Allianz Asset Management
86
Allianz Asset Management
Germany
$18.1M
HSBC Holdings
87
HSBC Holdings
United Kingdom
$18M
SAM
88
Silvercrest Asset Management
New York
$17.6M
SEI Investments
89
SEI Investments
Pennsylvania
$17.6M
BNP Paribas Financial Markets
90
BNP Paribas Financial Markets
France
$17.3M
Sumitomo Mitsui Trust Group
91
Sumitomo Mitsui Trust Group
Japan
$17.3M
Ameriprise
92
Ameriprise
Minnesota
$17M
A
93
AustralianSuper
Australia
$16.7M
WCM
94
Woodson Capital Management
Connecticut
$16.5M
TAM
95
Tocqueville Asset Management
New York
$16.4M
GCM
96
GoodHaven Capital Management
New Jersey
$15.3M
TIM
97
Thornburg Investment Management
New Mexico
$14.7M
California Public Employees Retirement System
98
California Public Employees Retirement System
California
$14.6M
LC
99
Littlejohn & Co
Connecticut
$14.1M
AllianceBernstein
100
AllianceBernstein
Tennessee
$13.9M