Comcast Corp. (CCZ) — Capital World Investors reports 5.1% ownership (184.2M shares)

Rhea-AI Filing Summary

Capital World Investors reported beneficial ownership of 184,166,475 shares of Comcast Corp. common stock, representing 5.1% of 3,588,401,619 shares believed outstanding as of the filing. The filing shows sole voting power over 181,190,709 shares and sole dispositive power over 184,166,475 shares. The Schedule 13G was signed by Jae Won Chung of Capital Research and Management Company on 05/13/2026.

Insights

Institutional Ownership Analyst

Large passive stake disclosed: 184,166,475 shares (5.1%).

Capital World Investors discloses a 5.1% beneficial position in Comcast Corp. with sole voting and dispositive powers reported for most shares. The filing is a Schedule 13G format, which typically indicates passive or qualifying institutional ownership rather than active control intent.

Key dependencies include any future amendments that would change the percent owned or voting status; subsequent filings would show changes in ownership percentages or voting arrangements.

Corporate Governance Specialist

Voting and disposition powers largely held directly by the reporting entity.

The disclosure lists 181,190,709 shares with sole voting power and 184,166,475 shares with sole dispositive power, indicating centralized decision authority within the reporting group. Ownership is framed through CWI and affiliated investment management entities.

Future Form 13D/13G amendments would be material if the position crosses thresholds or the investment intent changes.

Key Figures

Beneficially owned: 184,166,475 shares Percent of class: 5.1% Shares outstanding (believed): 3,588,401,619 shares +3 more

6 metrics

Beneficially owned 184,166,475 shares Amount beneficially owned reported in Schedule 13G

Percent of class 5.1% Percent of common stock believed outstanding

Shares outstanding (believed) 3,588,401,619 shares Shares believed to be outstanding as stated in the filing

Sole voting power 181,190,709 shares Shares with sole power to vote as reported

Sole dispositive power 184,166,475 shares Shares with sole power to dispose as reported

CUSIP 20030N101 CUSIP for Comcast Corp. common stock

Key Terms

Schedule 13G, Beneficial ownership, Sole dispositive power, Sole voting power

4 terms

Schedule 13G regulatory

"Capital World Investors filed a Schedule 13G reporting beneficial ownership"

A Schedule 13G is a formal document that investors file with the government when they acquire a large ownership stake in a company, usually for investment purposes rather than control. It helps keep the public informed about who owns significant parts of a company's shares, which can influence how the company is managed and how investors make decisions. Filing this schedule is important for transparency and understanding the ownership landscape of publicly traded companies.

Beneficial ownership financial

"CWI is deemed to be the beneficial owner of 184,166,475 shares"

Beneficial ownership means the person or entity that actually enjoys the benefits of owning shares or other assets — such as receiving dividends, voting rights, or price gains — even if the legal title is held in another name. For investors it matters because knowing who truly controls and profits from a company reveals who can influence decisions, exposes potential conflicts of interest or hidden concentration of power, and affects transparency and risk in the stock.

Sole dispositive power financial

"Sole power to dispose or to direct the disposition of: 184,166,475"

Sole dispositive power is the exclusive legal authority to decide what happens to a security — for example, whether to sell, transfer, or retain shares — without needing anyone else’s permission. Investors care because it signals who truly controls the economic outcome of an investment: like holding the only key to a safe, the holder can realize gains or losses and may trigger regulatory reporting, insider rules, or influence over corporate ownership.

Sole voting power governance

"Sole power to vote or to direct the vote: 181,190,709"

Sole voting power is the exclusive right to cast votes attached to a shareholder’s stock without needing approval from anyone else. Like holding the only remote control for a TV, it lets that holder decide corporate matters such as board members, mergers, and policy changes, making it important to investors because it concentrates control and can strongly influence a company’s strategy and the value of its shares.

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SECURITIES AND EXCHANGE COMMISSION
Washington, D.C. 20549

SCHEDULE 13G

UNDER THE SECURITIES EXCHANGE ACT OF 1934

Comcast Corp.

(Name of Issuer)

Common Stock

(Title of Class of Securities)

20030N101

(CUSIP Number)

03/31/2026

(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)

schemaVersion:

SCHEDULE 13G

CUSIP Number(s): 20030N101

1

Names of Reporting Persons

Capital World Investors

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 181,190,709.00
6	Shared Voting Power 0.00
7	Sole Dispositive Power 184,166,475.00
8	Shared Dispositive Power 0.00

9

Aggregate Amount Beneficially Owned by Each Reporting Person

184,166,475.00

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)

5.1 %

12

Type of Reporting Person (See Instructions)

IA

SCHEDULE 13G

Item 1.
(a)	Name of issuer: Comcast Corp.
(b)	Address of issuer's principal executive offices: One Comcast Center, Philadelphia, PA 19103-2838
Item 2.
(a)	Name of person filing: Capital World Investors
(b)	Address or principal business office or, if none, residence: 333 SOUTH HOPE STREET, 55TH FLOOR, LOS ANGELES, CALIFORNIA 90071
(c)	Citizenship: N/A
(d)	Title of class of securities: Common Stock
(e)	CUSIP Number(s): 20030N101
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: 184,166,475 ** **Capital World Investors ("CWI") is a division of Capital Research and Management Company ("CRMC"), as well as its investment management subsidiaries and affiliates Capital Bank and Trust Company, Capital International, Inc., Capital International Limited, Capital International Sarl, Capital International K.K., Capital Group Private Client Services, Inc., and Capital Group Investment Management Private Limited (together with CRMC, the "investment management entities"). CWI's divisions of each of the investment management entities collectively provide investment management services under the name "Capital World Investors." CWI is deemed to be the beneficial owner of 184,166,475 shares or 5.1% of the 3,588,401,619 shares believed to be outstanding.
(b)	Percent of class: 5.1 %
(c)	Number of shares as to which the person has:
	(i) Sole power to vote or to direct the vote: 181,190,709
	(ii) Shared power to vote or to direct the vote: 0
	(iii) Sole power to dispose or to direct the disposition of: 184,166,475
	(iv) Shared power to dispose or to direct the disposition of: 0
Item 5.	Ownership of 5 Percent or Less of a Class.
	Not Applicable
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.

Capital World Investors

Signature:	Jae Won Chung
Name/Title:	Senior Vice President and Associate General Counsel, Capital Research and Management Company
Date:	05/13/2026

FAQ

What stake did Capital World Investors report in Comcast (CCZ)?

Capital World Investors reported beneficial ownership of 184,166,475 shares, equal to 5.1% of the 3,588,401,619 shares the filing states are believed outstanding. The position is disclosed on a Schedule 13G signed 05/13/2026.

Does Capital World Investors control voting of the Comcast shares?

The filing shows sole voting power over 181,190,709 shares and shared voting power of 0. This indicates the reporting group asserts direct voting authority for the majority of the disclosed holdings.

How many Comcast shares does the filing say are outstanding?

The Schedule 13G states there are 3,588,401,619 shares believed to be outstanding. The 184,166,475 shares held by Capital World Investors are presented as 5.1% of that outstanding figure in the filing.

Who signed the Schedule 13G for Capital World Investors and when?

The disclosure is signed by Jae Won Chung, identified as Senior Vice President and Associate General Counsel of Capital Research and Management Company, with the signature date shown as 05/13/2026.