[SCHEDULE 13G/A] Illumina Inc SEC Filing

Rhea-AI Filing Summary

Capital World Investors filed an amended Schedule 13G reporting beneficial ownership of 16,866,776 Illumina shares, representing 10.7% of the 158,300,000 shares believed to be outstanding. CWI reports sole voting power over 16,802,393 shares and sole dispositive power over 16,866,776 shares, and identifies itself as a division of Capital Research and Management Company. The filing states the securities were acquired and are held in the ordinary course of business and were not acquired to change or influence control of Illumina. The filing includes the issuer address, filer address, and CUSIP 452327109.

Positive

• Beneficial ownership of 16,866,776 shares representing 10.7% of the class, a material disclosure above the 5% threshold
• Sole voting power of 16,802,393 shares and sole dispositive power of 16,866,776 clearly enumerated
• Filing classifies holdings as ordinary-course, passive ownership under Schedule 13G rather than an active intent to influence control

Negative

• None.

Insights

Financial Analyst

TL;DR: Capital World Investors holds a material 10.7% position in Illumina, disclosed as passive ownership.

The filing documents a sizeable holding of 16,866,776 shares (10.7%), which is material to holders given the total outstanding is stated as 158.3 million. The breakdown between voting and dispositive power shows near-complete control by CWI over votes and dispositions reported, which is relevant for shareholder vote math and potential market liquidity. The statement that the position is held in the ordinary course and not for influencing control signals passive intent under Schedule 13G rather than activist intent under Schedule 13D.

Corporate Governance Expert

TL;DR: Schedule 13G classification and certification point to passive ownership with no declared plan to influence control.

The filer certifies that the shares were not acquired to change or influence issuer control and were acquired in the ordinary course of business. That classification affects disclosure obligations and suggests CWI does not intend to pursue governance actions based on this filing. Investors should note the exact voting and dispositive numbers reported: 16,802,393 sole voting power and 16,866,776 sole dispositive power, which clarify the filers functional authorities over the position.

SECURITIES AND EXCHANGE COMMISSION
Washington, D.C. 20549

SCHEDULE 13G

UNDER THE SECURITIES EXCHANGE ACT OF 1934

(Amendment No. 2)

Illumina, Inc.

(Name of Issuer)

Common Stock

(Title of Class of Securities)

452327109

(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. 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 16,802,393.00
6	Shared Voting Power 0.00
7	Sole Dispositive Power 16,866,776.00
8	Shared Dispositive Power 0.00

9

Aggregate Amount Beneficially Owned by Each Reporting Person

16,866,776.00

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)

10.7 %

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: 16,866,776 ** **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 16,866,776 shares or 10.7% of the 158,300,000 shares believed to be outstanding.
(b)	Percent of class: 10.7 %
(c)	Number of shares as to which the person has:
	(i) Sole power to vote or to direct the vote: 16,802,393
	(ii) Shared power to vote or to direct the vote: 0
	(iii) Sole power to dispose or to direct the disposition of: 16,866,776
	(iv) Shared power to dispose or to direct the disposition of: 0
Item 5.	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.

Capital World Investors

Signature:	Timothy J. Moon
Name/Title:	Vice President and Senior Counsel, Capital Research and Management Company
Date:	08/04/2025

FAQ

How many Illumina (ILMN) shares does Capital World Investors own?

Capital World Investors reports beneficial ownership of 16,866,776 shares of Illumina common stock.

What percentage of ILMN does Capital World Investors hold?

The filing states this holding represents 10.7% of the shares believed outstanding (158,300,000 shares).

How much voting power does Capital World Investors report for ILMN?

CWI reports sole voting power over 16,802,393 shares and no shared voting power.

Was the ILMN position filed as passive or activist?

The Schedule 13G certifies the securities were acquired and are held in the ordinary course of business and were not acquired to change or influence control, indicating passive intent.

What identifying details are included in the filing for ILMN?

The filing provides issuer address (5200 Illumina Way, San Diego, CA), filer address (333 South Hope Street, Los Angeles), and CUSIP 452327109.