Amendment: SEC Form SC 13G/A filed by Builders FirstSource Inc.

11/8/24 10:34:33 AM ET

$BLDR

RETAIL: Building Materials

Consumer Discretionary

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SC 13G/A 1 SEC13G_Filing.htm SEC SCHEDULE 13G

UNITED STATES
SECURITIES AND EXCHANGE COMMISSION
Washington, D.C. 20549

SCHEDULE 13G

Under the Securities Exchange Act of 1934

(Amendment No. 3 )^*

Builders FirstSource, Inc.

(Name of Issuer)

Common Stock

(Title of Class of Securities)

12008R107

(CUSIP Number)

September 30, 2024

(Date of Event Which Requires Filing of this Statement)

Check the appropriate box to designate the rule pursuant to which this Schedule is filed:

[X]	Rule 13d-1(b)
[ ]	Rule 13d-1(c)
[ ]	Rule 13d-1(d)

^* The remainder of this cover page shall be filled out for a reporting person's initial filing on this form with respect to the subject class of securities, and for any subsequent amendment containing information which would alter the disclosures provided in a prior cover page.

The information required in the remainder of this cover page shall not be deemed to be "filed" for the purpose of Section 18 of the Securities Exchange Act of 1934 (the "Act") or otherwise subject to the liabilities of that section of the Act, but shall be subject to all other provisions of the Act (however, see the Notes.)

CUSIP No.

12008R107

1.	NAMES OF REPORTING PERSONS Wellington Management Group LLP
2.	CHECK THE APPROPRIATE BOX IF A MEMBER OF A GROUP (a) [ ] (b) [ ]
3.	SEC USE ONLY
4.	CITIZENSHIP OR PLACE OF ORGANIZATION Massachusetts
NUMBER OF SHARES BENEFICIALLY OWNED BY EACH REPORTING PERSON WITH		5. SOLE VOTING POWER	0
		6. SHARED VOTING POWER	2,933,812
		7. SOLE DISPOSITIVE POWER	0
		8. SHARED DISPOSITIVE POWER	3,457,888
9.	AGGREGATE AMOUNT BENEFICIALLY OWNED BY EACH REPORTING PERSON 3,457,888
10.	CHECK IF THE AGGREGATE AMOUNT IN ROW (9) EXCLUDES CERTAIN SHARES [ ]
11.	PERCENT OF CLASS REPRESENTED BY AMOUNT IN ROW (9) 2.97%
12.	TYPE OF REPORTING PERSON HC

CUSIP No.

12008R107

1.	NAMES OF REPORTING PERSONS Wellington Group Holdings LLP
2.	CHECK THE APPROPRIATE BOX IF A MEMBER OF A GROUP (a) [ ] (b) [ ]
3.	SEC USE ONLY
4.	CITIZENSHIP OR PLACE OF ORGANIZATION Delaware
NUMBER OF SHARES BENEFICIALLY OWNED BY EACH REPORTING PERSON WITH		5. SOLE VOTING POWER	0
		6. SHARED VOTING POWER	2,933,812
		7. SOLE DISPOSITIVE POWER	0
		8. SHARED DISPOSITIVE POWER	3,457,888
9.	AGGREGATE AMOUNT BENEFICIALLY OWNED BY EACH REPORTING PERSON 3,457,888
10.	CHECK IF THE AGGREGATE AMOUNT IN ROW (9) EXCLUDES CERTAIN SHARES [ ]
11.	PERCENT OF CLASS REPRESENTED BY AMOUNT IN ROW (9) 2.97%
12.	TYPE OF REPORTING PERSON HC

CUSIP No.

12008R107

1.	NAMES OF REPORTING PERSONS Wellington Investment Advisors Holdings LLP
2.	CHECK THE APPROPRIATE BOX IF A MEMBER OF A GROUP (a) [ ] (b) [ ]
3.	SEC USE ONLY
4.	CITIZENSHIP OR PLACE OF ORGANIZATION Delaware
NUMBER OF SHARES BENEFICIALLY OWNED BY EACH REPORTING PERSON WITH		5. SOLE VOTING POWER	0
		6. SHARED VOTING POWER	2,933,812
		7. SOLE DISPOSITIVE POWER	0
		8. SHARED DISPOSITIVE POWER	3,457,888
9.	AGGREGATE AMOUNT BENEFICIALLY OWNED BY EACH REPORTING PERSON 3,457,888
10.	CHECK IF THE AGGREGATE AMOUNT IN ROW (9) EXCLUDES CERTAIN SHARES [ ]
11.	PERCENT OF CLASS REPRESENTED BY AMOUNT IN ROW (9) 2.97%
12.	TYPE OF REPORTING PERSON HC

Item 1.
	(a)	Name of Issuer Builders FirstSource, Inc.
	(b)	Address of Issuer's Principal Executive Offices 6031 Connection Drive Suite 400 Irving, TX 75039
Item 2.
	(a)	Name of Person Filing Wellington Management Group LLP Wellington Group Holdings LLP Wellington Investment Advisors Holdings LLP
	(b)	Address of Principal Business Office or, if None, Residence c/o Wellington Management Company LLP 280 Congress Street Boston, MA 02210
	(c)	Citizenship Wellington Management Group LLP - Massachusetts Wellington Group Holdings LLP - Delaware Wellington Investment Advisors Holdings LLP - Delaware
	(d)	Title of Class of Securities Common Stock
	(e)	CUSIP Number 12008R107
Item 3.	If This Statement is Filed Pursuant to Rule 13d-1(b), or 13d-2(b) or (c), Check Whether the Person Filing is a:
	(a)	[ ]	Broker or dealer registered under Section 15 of the Act (15 U.S.C. 78o).
	(b)	[ ]	Bank as defined in Section 3(a)(6) of the Act (15 U.S.C. 78c).
	(c)	[ ]	Insurance Company as defined in Section 3(a)(19) of the Act (15 U.S.C. 78c).
	(d)	[ ]	Investment Company registered under Section 8 of the Investment Company Act of 1940 (15 U.S.C. 80a-8).
	(e)	[ ]	An investment adviser in accordance with Rule 240.13d-1(b)(1)(ii)(E);
	(f)	[ ]	An employee benefit plan or endowment fund in accordance with Rule 240.13d-1(b)(1)(ii)(F);
	(g)	[X]	A parent holding company or control person in accordance with Rule 240.13d-1(b)(1)(ii)(G);
	(h)	[ ]	A savings association as defined in Section 3(b) of the Federal Deposit Insurance Act (12 U.S.C. 1813);
	(i)	[ ]	A church plan that is excluded from the definition of an investment company under Section 3(c)(14) of the Investment Company Act of 1940 (15 U.S.C. 80a-3);
	(j)	[ ]	Group, in accordance with Rule 240.13d-1(b)(1)(ii)(J).
		If this statement is filed pursuant to Rule 13d-1(c), check this box [ ]
Item 4.	Ownership.
Provide the following information regarding the aggregate number and percentage of the class of securities of the issuer identified in Item 1.
	(a)	Amount Beneficially Owned:
		See the responses to Item 9 on the attached cover pages.
	(b)	Percent of Class:
		See the responses to Item 11 on the attached cover pages.
	(c)	Number of shares as to which such person has:
		(i)	sole power to vote or to direct the vote	0
		(ii)	shared power to vote or to direct the vote	See the responses to Item 6 on the attached cover pages.
		(iii)	sole power to dispose or to direct the disposition of	0
		(iv)	shared power to dispose or to direct the disposition of	See the responses to Item 8 on the attached cover pages.
Item 5.	Ownership of Five Percent or Less of Class.
	If this statement is being filed to report the fact that as of the date hereof the reporting person has ceased to be the beneficial owner of more than five percent of the class of securities, check the following: [X]
Item 6.	Ownership of More than Five Percent on Behalf of Another Person.
	The securities as to which this Schedule is filed are owned of record by clients of one or more investment advisers identified in Item 7 directly or indirectly owned by Wellington Management Group LLP. Those clients have the right to receive, or the power to direct the receipt of, dividends from, or the proceeds from the sale of, such securities. No such client is known to have such right or power with respect to more than five percent of this class of securities, except as follows: Not Applicable.
Item 7.	Identification and Classification of the Subsidiary Which Acquired the Security Being Reported on by the Parent Holding Company.
	Pursuant to the instructions in Item 7 of Schedule 13G, the following lists the identity and Item 3 classification of each relevant entity that beneficially owns shares of the security class being reported on this Schedule 13G.
	Wellington Group Holdings LLP – HC
	Wellington Investment Advisors LLP – HC
	Wellington Management Global Holdings, Ltd. - HC
	One or more of the following investment advisers (the “Wellington Investment Advisers”):
	Wellington Management Company LLP – IA
	Wellington Management Canada LLC – IA
	Wellington Management Singapore Pte Ltd – IA
	Wellington Management Hong Kong Ltd – IA
	Wellington Management International Ltd – IA
	Wellington Management Japan Pte Ltd – IA
	Wellington Management Australia Pty Ltd - IA
	The securities as to which this Schedule is filed by Wellington Management Group LLP, as parent holding company of certain holding companies and the Wellington Investment Advisers, are owned of record by clients of the Wellington Investment Advisers. Wellington Investment Advisors Holdings LLP controls directly, or indirectly through Wellington Management Global Holdings, Ltd., the Wellington Investment Advisers. Wellington Investment Advisors Holdings LLP is owned by Wellington Group Holdings LLP. Wellington Group Holdings LLP is owned by Wellington Management Group LLP.
Item 8.	Identification and Classification of Members of the Group. Not Applicable.
Item 9.	Notice of Dissolution of Group. Not Applicable.
Item 10.	Certification. By signing below I certify that, to the best of my knowledge and belief, the securities referred to above were acquired and are held in the ordinary course of business and were not acquired and are not held for the purpose of or with the effect of changing or influencing the control of the issuer of the securities and were not acquired and are not held in connection with or as a participant in any transaction having that purpose or effect.

SIGNATURE

After reasonable inquiry and to the best of my knowledge and belief, I certify that the information set forth in this statement is true, complete and correct.

	By: Wellington Management Group LLP
	By: /s/ Taisia Lowe
	Name: Taisia Lowe
	Title: Regulatory Analyst
	Date: November 14,2024

	By: Wellington Group Holdings LLP
	By: /s/ Taisia Lowe
	Name: Taisia Lowe
	Title: Regulatory Analyst
	Date: November 14,2024

	By: Wellington Investment Advisors Holdings LLP
	By: /s/ Taisia Lowe
	Name: Taisia Lowe
	Title: Regulatory Analyst
	Date: November 14,2024

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Recent Analyst Ratings for

$BLDR

Date	Price Target	Rating	Analyst
3/5/2026	$119.00	Sector Perform → Outperform	RBC Capital Mkts
2/26/2026		Outperform	William Blair
1/20/2026	$137.00	Overweight → Equal-Weight	Stephens
12/15/2025	$110.00	Buy → Hold	Jefferies
11/17/2025		Equal Weight	Wells Fargo
10/20/2025		Sell	Vertical Research
10/1/2025	$145.00	Overweight	KeyBanc Capital Markets
9/15/2025	$145.00	Outperform → Neutral	Wedbush

More analyst ratings

Amendment: SEC Form SC 13G/A filed by Builders FirstSource Inc.

11/8/24 10:34:33 AM ET

$BLDR

RETAIL: Building Materials

Consumer Discretionary

Get the next $BLDR alert in real time by email

SC 13G/A 1 SEC13G_Filing.htm SEC SCHEDULE 13G

UNITED STATES
SECURITIES AND EXCHANGE COMMISSION
Washington, D.C. 20549

SCHEDULE 13G

Under the Securities Exchange Act of 1934

(Amendment No. 3 )^*

Builders FirstSource, Inc.

(Name of Issuer)

Common Stock

(Title of Class of Securities)

12008R107

(CUSIP Number)

September 30, 2024

(Date of Event Which Requires Filing of this Statement)

Check the appropriate box to designate the rule pursuant to which this Schedule is filed:

[X]	Rule 13d-1(b)
[ ]	Rule 13d-1(c)
[ ]	Rule 13d-1(d)

CUSIP No.

12008R107

1.	NAMES OF REPORTING PERSONS Wellington Management Group LLP
2.	CHECK THE APPROPRIATE BOX IF A MEMBER OF A GROUP (a) [ ] (b) [ ]
3.	SEC USE ONLY
4.	CITIZENSHIP OR PLACE OF ORGANIZATION Massachusetts
NUMBER OF SHARES BENEFICIALLY OWNED BY EACH REPORTING PERSON WITH		5. SOLE VOTING POWER	0
		6. SHARED VOTING POWER	2,933,812
		7. SOLE DISPOSITIVE POWER	0
		8. SHARED DISPOSITIVE POWER	3,457,888
9.	AGGREGATE AMOUNT BENEFICIALLY OWNED BY EACH REPORTING PERSON 3,457,888
10.	CHECK IF THE AGGREGATE AMOUNT IN ROW (9) EXCLUDES CERTAIN SHARES [ ]
11.	PERCENT OF CLASS REPRESENTED BY AMOUNT IN ROW (9) 2.97%
12.	TYPE OF REPORTING PERSON HC

CUSIP No.

12008R107

1.	NAMES OF REPORTING PERSONS Wellington Group Holdings LLP
2.	CHECK THE APPROPRIATE BOX IF A MEMBER OF A GROUP (a) [ ] (b) [ ]
3.	SEC USE ONLY
4.	CITIZENSHIP OR PLACE OF ORGANIZATION Delaware
NUMBER OF SHARES BENEFICIALLY OWNED BY EACH REPORTING PERSON WITH		5. SOLE VOTING POWER	0
		6. SHARED VOTING POWER	2,933,812
		7. SOLE DISPOSITIVE POWER	0
		8. SHARED DISPOSITIVE POWER	3,457,888
9.	AGGREGATE AMOUNT BENEFICIALLY OWNED BY EACH REPORTING PERSON 3,457,888
10.	CHECK IF THE AGGREGATE AMOUNT IN ROW (9) EXCLUDES CERTAIN SHARES [ ]
11.	PERCENT OF CLASS REPRESENTED BY AMOUNT IN ROW (9) 2.97%
12.	TYPE OF REPORTING PERSON HC

CUSIP No.

12008R107

1.	NAMES OF REPORTING PERSONS Wellington Investment Advisors Holdings LLP
2.	CHECK THE APPROPRIATE BOX IF A MEMBER OF A GROUP (a) [ ] (b) [ ]
3.	SEC USE ONLY
4.	CITIZENSHIP OR PLACE OF ORGANIZATION Delaware
NUMBER OF SHARES BENEFICIALLY OWNED BY EACH REPORTING PERSON WITH		5. SOLE VOTING POWER	0
		6. SHARED VOTING POWER	2,933,812
		7. SOLE DISPOSITIVE POWER	0
		8. SHARED DISPOSITIVE POWER	3,457,888
9.	AGGREGATE AMOUNT BENEFICIALLY OWNED BY EACH REPORTING PERSON 3,457,888
10.	CHECK IF THE AGGREGATE AMOUNT IN ROW (9) EXCLUDES CERTAIN SHARES [ ]
11.	PERCENT OF CLASS REPRESENTED BY AMOUNT IN ROW (9) 2.97%
12.	TYPE OF REPORTING PERSON HC

Item 1.
	(a)	Name of Issuer Builders FirstSource, Inc.
	(b)	Address of Issuer's Principal Executive Offices 6031 Connection Drive Suite 400 Irving, TX 75039
Item 2.
	(a)	Name of Person Filing Wellington Management Group LLP Wellington Group Holdings LLP Wellington Investment Advisors Holdings LLP
	(b)	Address of Principal Business Office or, if None, Residence c/o Wellington Management Company LLP 280 Congress Street Boston, MA 02210
	(c)	Citizenship Wellington Management Group LLP - Massachusetts Wellington Group Holdings LLP - Delaware Wellington Investment Advisors Holdings LLP - Delaware
	(d)	Title of Class of Securities Common Stock
	(e)	CUSIP Number 12008R107
Item 3.	If This Statement is Filed Pursuant to Rule 13d-1(b), or 13d-2(b) or (c), Check Whether the Person Filing is a:
	(a)	[ ]	Broker or dealer registered under Section 15 of the Act (15 U.S.C. 78o).
	(b)	[ ]	Bank as defined in Section 3(a)(6) of the Act (15 U.S.C. 78c).
	(c)	[ ]	Insurance Company as defined in Section 3(a)(19) of the Act (15 U.S.C. 78c).
	(d)	[ ]	Investment Company registered under Section 8 of the Investment Company Act of 1940 (15 U.S.C. 80a-8).
	(e)	[ ]	An investment adviser in accordance with Rule 240.13d-1(b)(1)(ii)(E);
	(f)	[ ]	An employee benefit plan or endowment fund in accordance with Rule 240.13d-1(b)(1)(ii)(F);
	(g)	[X]	A parent holding company or control person in accordance with Rule 240.13d-1(b)(1)(ii)(G);
	(h)	[ ]	A savings association as defined in Section 3(b) of the Federal Deposit Insurance Act (12 U.S.C. 1813);
	(i)	[ ]	A church plan that is excluded from the definition of an investment company under Section 3(c)(14) of the Investment Company Act of 1940 (15 U.S.C. 80a-3);
	(j)	[ ]	Group, in accordance with Rule 240.13d-1(b)(1)(ii)(J).
		If this statement is filed pursuant to Rule 13d-1(c), check this box [ ]
Item 4.	Ownership.
Provide the following information regarding the aggregate number and percentage of the class of securities of the issuer identified in Item 1.
	(a)	Amount Beneficially Owned:
		See the responses to Item 9 on the attached cover pages.
	(b)	Percent of Class:
		See the responses to Item 11 on the attached cover pages.
	(c)	Number of shares as to which such person has:
		(i)	sole power to vote or to direct the vote	0
		(ii)	shared power to vote or to direct the vote	See the responses to Item 6 on the attached cover pages.
		(iii)	sole power to dispose or to direct the disposition of	0
		(iv)	shared power to dispose or to direct the disposition of	See the responses to Item 8 on the attached cover pages.
Item 5.	Ownership of Five Percent or Less of Class.
	If this statement is being filed to report the fact that as of the date hereof the reporting person has ceased to be the beneficial owner of more than five percent of the class of securities, check the following: [X]
Item 6.	Ownership of More than Five Percent on Behalf of Another Person.
	The securities as to which this Schedule is filed are owned of record by clients of one or more investment advisers identified in Item 7 directly or indirectly owned by Wellington Management Group LLP. Those clients have the right to receive, or the power to direct the receipt of, dividends from, or the proceeds from the sale of, such securities. No such client is known to have such right or power with respect to more than five percent of this class of securities, except as follows: Not Applicable.
Item 7.	Identification and Classification of the Subsidiary Which Acquired the Security Being Reported on by the Parent Holding Company.
	Pursuant to the instructions in Item 7 of Schedule 13G, the following lists the identity and Item 3 classification of each relevant entity that beneficially owns shares of the security class being reported on this Schedule 13G.
	Wellington Group Holdings LLP – HC
	Wellington Investment Advisors LLP – HC
	Wellington Management Global Holdings, Ltd. - HC
	One or more of the following investment advisers (the “Wellington Investment Advisers”):
	Wellington Management Company LLP – IA
	Wellington Management Canada LLC – IA
	Wellington Management Singapore Pte Ltd – IA
	Wellington Management Hong Kong Ltd – IA
	Wellington Management International Ltd – IA
	Wellington Management Japan Pte Ltd – IA
	Wellington Management Australia Pty Ltd - IA
	The securities as to which this Schedule is filed by Wellington Management Group LLP, as parent holding company of certain holding companies and the Wellington Investment Advisers, are owned of record by clients of the Wellington Investment Advisers. Wellington Investment Advisors Holdings LLP controls directly, or indirectly through Wellington Management Global Holdings, Ltd., the Wellington Investment Advisers. Wellington Investment Advisors Holdings LLP is owned by Wellington Group Holdings LLP. Wellington Group Holdings LLP is owned by Wellington Management Group LLP.
Item 8.	Identification and Classification of Members of the Group. Not Applicable.
Item 9.	Notice of Dissolution of Group. Not Applicable.
Item 10.	Certification. By signing below I certify that, to the best of my knowledge and belief, the securities referred to above were acquired and are held in the ordinary course of business and were not acquired and are not held for the purpose of or with the effect of changing or influencing the control of the issuer of the securities and were not acquired and are not held in connection with or as a participant in any transaction having that purpose or effect.

SIGNATURE

After reasonable inquiry and to the best of my knowledge and belief, I certify that the information set forth in this statement is true, complete and correct.

	By: Wellington Management Group LLP
	By: /s/ Taisia Lowe
	Name: Taisia Lowe
	Title: Regulatory Analyst
	Date: November 14,2024

	By: Wellington Group Holdings LLP
	By: /s/ Taisia Lowe
	Name: Taisia Lowe
	Title: Regulatory Analyst
	Date: November 14,2024

	By: Wellington Investment Advisors Holdings LLP
	By: /s/ Taisia Lowe
	Name: Taisia Lowe
	Title: Regulatory Analyst
	Date: November 14,2024

Get the next $BLDR alert in real time by email

Recent Analyst Ratings for

$BLDR

Date	Price Target	Rating	Analyst
3/5/2026	$119.00	Sector Perform → Outperform	RBC Capital Mkts
2/26/2026		Outperform	William Blair
1/20/2026	$137.00	Overweight → Equal-Weight	Stephens
12/15/2025	$110.00	Buy → Hold	Jefferies
11/17/2025		Equal Weight	Wells Fargo
10/20/2025		Sell	Vertical Research
10/1/2025	$145.00	Overweight	KeyBanc Capital Markets
9/15/2025	$145.00	Outperform → Neutral	Wedbush

More analyst ratings

Amendment: SEC Form SC 13G/A filed by Builders FirstSource Inc.

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549

SCHEDULE 13G

Under the Securities Exchange Act of 1934

(Amendment No. 3 )*

SIGNATURE

Crush Q1 2026 with the Best AI Superconnector

Recent Analyst Ratings for $BLDR

Amendment: SEC Form SC 13G/A filed by Builders FirstSource Inc.

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549

SCHEDULE 13G

Under the Securities Exchange Act of 1934

(Amendment No. 3 )*

SIGNATURE

Crush Q1 2026 with the Best AI Superconnector

Recent Analyst Ratings for $BLDR

$BLDR Press Releases

Builders FirstSource Announces COO and CHRO Succession Plan

Builders FirstSource Reports First Quarter 2026 Results

Builders FirstSource Announces $500 Million Share Repurchase Authorization

$BLDR Insider Trading

Director Boydston Cory Jacobs was granted 409 shares, increasing direct ownership by 2% to 26,721 units (SEC Form 4)

Director Christophe Cleveland A was granted 491 shares, increasing direct ownership by 1% to 38,198 units (SEC Form 4)

Director Alexander Mark A was granted 409 shares, increasing direct ownership by 0.86% to 47,913 units (SEC Form 4)

$BLDR Insider Purchases

Director Levy Paul S bought $4,386,500 worth of shares (50,000 units at $87.73), increasing direct ownership by 3% to 1,727,191 units (SEC Form 4)

President - East Division Vance Todd bought $224,994 worth of shares (1,948 units at $115.50), increasing direct ownership by 7% to 31,121 units (SEC Form 4)

Director Charles Dirkson R bought $548,350 worth of shares (5,000 units at $109.67) and was granted 1,707 shares, increasing direct ownership by 20% to 10,237 units (SEC Form 4)

$BLDR SEC Filings

SEC Form SD filed by Builders FirstSource Inc.

SEC Form S-8 filed by Builders FirstSource Inc.

Builders FirstSource Inc. filed SEC Form 8-K: Leadership Update, Submission of Matters to a Vote of Security Holders, Regulation FD Disclosure, Financial Statements and Exhibits

$BLDR Analyst Ratings

Builders FirstSource upgraded by RBC Capital Mkts with a new price target

William Blair initiated coverage on Builders FirstSource

Builders FirstSource downgraded by Stephens with a new price target

$BLDR Leadership Updates

Builders FirstSource Announces COO and CHRO Succession Plan

Alena Brenner Appointed Builders FirstSource Chief Legal Officer

Eagle Materials Appoints David Rush to Its Board of Directors

$BLDR Large Ownership Changes

SEC Form SC 13G filed by Builders FirstSource Inc.