[SCHEDULE 13G/A] BBB Foods Inc. SEC Filing

Rhea-AI Filing Summary

William Blair Investment Management, LLC filed Amendment No. 1 to Schedule 13G disclosing its beneficial ownership of BBB Foods Inc. (CUSIP G0896C103) as of 30 Jun 2025.

The firm reports owning 2,639,241 common shares, equal to 4.3 % of the outstanding class. It exercises sole voting power over 2,188,326 shares and sole dispositive power over the entire stake; no voting or dispositive authority is shared. Because the position is below the 5 % threshold, the filing indicates “Ownership of 5 percent or less of a class” and is submitted on a passive basis under Rule 13d-1(b). The certifying officer states the shares were acquired in the ordinary course of business and not for the purpose of influencing control. No group membership, subsidiary involvement, or 13d control intentions are disclosed.

Insights

Equity Ownership Analyst

TL;DR – Institutional adviser reports 4.3 % BBB Foods stake; neutral control implications.

This 13G/A shows William Blair Investment Management holds 2.64 M BBB Foods shares. The stake is below the 5 % level; therefore, the disclosure is mainly for transparency and does not suggest activism. Sole voting/dispositive powers indicate direct control of the shares within managed accounts. From a liquidity perspective, 4.3 % is meaningful but not large enough to block corporate actions. For investors, the filing confirms continuing institutional support yet signals no intent to influence management. Overall impact is neutral with limited market-moving significance.

SECURITIES AND EXCHANGE COMMISSION
Washington, D.C. 20549

SCHEDULE 13G

UNDER THE SECURITIES EXCHANGE ACT OF 1934

(Amendment No. 1)

BBB FOODS INC

(Name of Issuer)

Common Stock

(Title of Class of Securities)

G0896C103

(CUSIP Number)

06/30/2025

(Date of Event Which Requires Filing of this Statement)

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

Rule 13d-1(b)

Rule 13d-1(c)

Rule 13d-1(d)

SCHEDULE 13G

CUSIP No. G0896C103

1

Names of Reporting Persons

WILLIAM BLAIR INVESTMENT MANAGEMENT, LLC

2

Check the appropriate box if a member of a Group (see instructions)

(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 2,188,326.00
6	Shared Voting Power 0.00
7	Sole Dispositive Power 2,639,241.00
8	Shared Dispositive Power 0.00

9

Aggregate Amount Beneficially Owned by Each Reporting Person

2,639,241.00

10

Check box if the aggregate amount in row (9) excludes certain shares (See Instructions)

11

Percent of class represented by amount in row (9)

4.3 %

12

Type of Reporting Person (See Instructions)

IA

SCHEDULE 13G

Item 1.
(a)	Name of issuer: BBB FOODS INC
(b)	Address of issuer's principal executive offices: AV. PDTE. MASARYK 8, POLANCO V SECC,, AV. PDTE. MASARYK 8, POLANCO V SECC,, MEXICO CITY, MEXICO, 11560
Item 2.
(a)	Name of person filing: William Blair Investment Management, LLC
(b)	Address or principal business office or, if none, residence: 150 North Riverside Plaza, Chicago, IL 60606
(c)	Citizenship: Delaware
(d)	Title of class of securities: Common Stock
(e)	CUSIP No.: G0896C103
Item 3.	If this statement is filed pursuant to §§ 240.13d-1(b) or 240.13d-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 § 240.13d-1(b)(1)(ii)(E);
(f)	An employee benefit plan or endowment fund in accordance with § 240.13d-1(b)(1)(ii)(F);
(g)	A parent holding company or control person in accordance with § 240.13d-1(b)(1)(ii)(G);
(h)	A savings associations 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)	A non-U.S. institution in accordance with § 240.13d-1(b)(1)(ii)(J). If filing as a non-U.S. institution in accordance with § 240.13d-1(b)(1)(ii)(J), please specify the type of institution:
(k)	Group, in accordance with Rule 240.13d-1(b)(1)(ii)(K).
Item 4.	Ownership
(a)	Amount beneficially owned: 2,639,241
(b)	Percent of class: 4.3%
(c)	Number of shares as to which the person has:
	(i) Sole power to vote or to direct the vote: 2,188,326
	(ii) Shared power to vote or to direct the vote: 0
	(iii) Sole power to dispose or to direct the disposition of: 2,639,241
	(iv) Shared power to dispose or to direct the disposition of: 0
Item 5.	Ownership of 5 Percent or Less of a Class.
	Ownership of 5 percent or less of a class
Item 6.	Ownership of more than 5 Percent on Behalf of Another Person.
	Not Applicable
Item 7.	Identification and Classification of the Subsidiary Which Acquired the Security Being Reported on by the Parent Holding Company or Control Person.
	Not Applicable
Item 8.	Identification and Classification of Members of the Group.
	Not Applicable
Item 9.	Notice of Dissolution of Group.
	Not Applicable

Item 10.

Certifications:

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, other than activities solely in connection with a nomination under § 240.14a-11.

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.

WILLIAM BLAIR INVESTMENT MANAGEMENT, LLC

Signature:	Walter R. Randall, Jr.
Name/Title:	Chief Compliance Officer
Date:	07/30/2025

FAQ

How many BBB Foods (TBBB) shares does William Blair own?

William Blair Investment Management reports owning 2,639,241 common shares.

What percentage of BBB Foods’ outstanding stock does this represent?

The stake equals 4.3 % of the company’s common shares.

Does William Blair share voting power with any other entity?

No. The adviser lists 0 shared voting power; all 2,188,326 votable shares are held solely.

Why was this Schedule 13G/A filed?

Rule 13d requires disclosure when an institutional investor’s stake approaches or moves within reporting thresholds; here, ownership is <5 % and passive.

When was the stake measurement date and filing signed?

Beneficial ownership is reported as of 30 Jun 2025; the certification was signed on 30 Jul 2025.