[SCHEDULE 13G/A] ILLUMINA, INC. Amended Passive Investment Disclosure

Rhea-AI Filing Summary

Illumina, Inc. filing shows Capital World Investors reports beneficial ownership of 15,776,452 shares, equal to 10.3% of 152,900,000 shares believed to be outstanding. The filing states CWI has sole voting power over 15,688,387 shares and sole dispositive power over 15,776,452 shares.

The Schedule 13G/A is labeled as an amendment and is signed by a Capital Research and Management Company officer. The disclosure describes the investment management structure and lists affiliated entities that comprise Capital World Investors.

Insights

Institutional Ownership Analyst

Large passive stake disclosed: 10.3% of shares outstanding.

Capital World Investors reports beneficial ownership of 15,776,452 shares, representing 10.3% of the 152,900,000 shares the filing cites as outstanding. The filing lists voting and dispositive power figures that indicate control over voting decisions for most of that stake.

Such a disclosure signals a meaningful institutional position; subsequent Form 13 filings or amendments could show changes. Further ownership changes would appear in later filings if CWI crosses additional regulatory thresholds.

Securities Compliance Counsel

Amendment clarifies beneficial ownership and affiliated reporting entities.

The Schedule 13G/A describes the relationships among CRMC and affiliated investment management entities and attributes beneficial ownership to Capital World Investors. The filing specifies voting and dispositive powers and is signed by an authorized officer.

Disclosure preserves statutory tracing of ownership by affiliated managers; any change in ownership percentage or voting power would require an updated filing per applicable rules.

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Accepted by SEC EDGAR 05/14/2026 - 01:55 PM Learn about SEC filing dates

SECURITIES AND EXCHANGE COMMISSION
Washington, D.C. 20549

SCHEDULE 13G

UNDER THE SECURITIES EXCHANGE ACT OF 1934

(Amendment No. 4)

Illumina, Inc.

(Name of Issuer)

Common Stock

(Title of Class of Securities)

452327109

(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): 452327109

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 15,688,387.00
6	Shared Voting Power 0.00
7	Sole Dispositive Power 15,776,452.00
8	Shared Dispositive Power 0.00

9

Aggregate Amount Beneficially Owned by Each Reporting Person

15,776,452.00

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)

10.3 %

12

Type of Reporting Person (See Instructions)

IA

SCHEDULE 13G

Item 1.
(a)	Name of issuer: Illumina, Inc.
(b)	Address of issuer's principal executive offices: 5200 Illumina Way, San Diego, CA 92122, United States of America
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 No.: 452327109
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: 15,776,452 ** **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 15,776,452 shares or 10.3% of the 152,900,000 shares believed to be outstanding.
(b)	Percent of class: 10.3 %
(c)	Number of shares as to which the person has:
	(i) Sole power to vote or to direct the vote: 15,688,387
	(ii) Shared power to vote or to direct the vote: 0
	(iii) Sole power to dispose or to direct the disposition of: 15,776,452
	(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