As Of	Filer	Filing¹	For·On·As	Docs:Size	Issuer		Filing Agent

12/15/09  Builders FirstSource, Inc.        424B3                  1:471K                                   Donnelley … Solutions/FA 
12/15/09  Builders FirstSource, Inc.        DEF 14A     1/14/10    1:1.4M                                   Donnelley … Solutions/FA 
12/14/09‡ Builders FirstSource, Inc.        EFFECT     12/14/09    1:2K                                     SEC #5                   

____________
‡	A non-Insider-Ownership Filing that was accepted after the SEC “closed” at 5:30:00pm ET.  The legal “Filed As Of” date may be the next, or another, day.
¹	Filing/Form Types:  -K
	424B3	Prospectus – New Facts or Events.
	DEF 14A	Definitive Proxy Statement — Schedule 14A.
	EFFECT	SEC Notice of Effectiveness.