[SCHEDULE 13G] IDEAYA Biosciences, Inc. SEC Filing

Rhea-AI Filing Summary

Capital Research Global Investors reports beneficial ownership of 6,552,691 shares of IDEAYA Biosciences common stock, representing 7.5% of the 87,581,963 shares the filing states are outstanding. The disclosure is made on a Schedule 13G and includes a certification that the securities were acquired and are held in the ordinary course of business and were not acquired to change or influence control of the issuer.

The filing shows CRGI has sole voting and sole dispositive power over the reported shares and names SMALLCAP World Fund, Inc. as an account on whose behalf shares are held. No group affiliation or intent to seek control is indicated in the statement.

Positive

• Reports beneficial ownership of 6,552,691 shares of IDEAYA common stock, a clearly stated holding amount
• Disclosed stake represents a measurable 7.5% of outstanding shares, indicating significant institutional interest
• Filed on Schedule 13G and includes a certification that shares are held in the ordinary course of business and not to change control

Negative

• None.

Insights

Financial Analyst

TL;DR: CRGI discloses a material passive stake in IDEAYA equal to 7.5%, signaling a notable institutional position without a stated control intent.

The filing documents a meaningful institutional holding of 6,552,691 shares (7.5%) in IDEAYA reported on Schedule 13G. Because the filer certifies the holdings are held in the ordinary course and not to influence control, this is a passive disclosure rather than an activist or control-seeking move. For investors, the development is notable as it increases institutional ownership concentration but does not by itself imply strategic change at the company.

Corporate Governance Expert

TL;DR: Schedule 13G filing reflects passive ownership with sole voting/dispositive power but contains no indication of coordination or governance action.

The Schedule 13G shows CRGI exercises sole voting and dispositive power over the reported shares. The certification language and absence of group identification or 13D-level disclosures suggest no intent to alter board control or pursue governance actions. From a governance perspective, the filing should be viewed as increased passive institutional ownership rather than a triggering event for control-related disclosures.

SECURITIES AND EXCHANGE COMMISSION
Washington, D.C. 20549

SCHEDULE 13G

UNDER THE SECURITIES EXCHANGE ACT OF 1934

IDEAYA Biosciences, Inc.

(Name of Issuer)

Common Stock

(Title of Class of Securities)

45166A102

(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. 45166A102

1

Names of Reporting Persons

Capital Research Global 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 6,552,691.00
6	Shared Voting Power 0.00
7	Sole Dispositive Power 6,552,691.00
8	Shared Dispositive Power 0.00

9

Aggregate Amount Beneficially Owned by Each Reporting Person

6,552,691.00

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)

7.5 %

12

Type of Reporting Person (See Instructions)

IA

SCHEDULE 13G

Item 1.
(a)	Name of issuer: IDEAYA Biosciences, Inc.
(b)	Address of issuer's principal executive offices: 5000 SHORELINE CT, SUITE 300, SOUTH SAN FRANCISCO, CA 94080
Item 2.
(a)	Name of person filing: Capital Research Global Investors
(b)	Address or principal business office or, if none, residence: 333 South Hope Street, 55th Fl, Los Angeles, CA 90071
(c)	Citizenship: N/A
(d)	Title of class of securities: Common Stock
(e)	CUSIP No.: 45166A102
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: 6,552,691 ** **Capital Research Global Investors ("CRGI") 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"). CRGI's divisions of each of the investment management entities collectively provide investment management services under the name "Capital Research Global Investors." CRGI is deemed to be the beneficial owner of 6,552,691 shares or 7.5% of the 87,581,963 shares believed to be outstanding.
(b)	Percent of class: 7.5 %
(c)	Number of shares as to which the person has:
	(i) Sole power to vote or to direct the vote: 6,552,691
	(ii) Shared power to vote or to direct the vote: 0
	(iii) Sole power to dispose or to direct the disposition of: 6,552,691
	(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.
	If any other person is known to have the right to receive or the power to direct the receipt of dividends from, or the proceeds from the sale of, such securities, a statement to that effect should be included in response to this item and, if such interest relates to more than 5 percent of the class, such person should be identified. A listing of the shareholders of an investment company registered under the Investment Company Act of 1940 or the beneficiaries of employee benefit plan, pension fund or endowment fund is not required. SMALLCAP World Fund, Inc.
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 Research Global Investors

Signature:	Jae Won Chung
Name/Title:	Vice President and Senior Counsel II, Capital Research and Management Company
Date:	08/05/2025

FAQ

How many IDEAYA (IDYA) shares does Capital Research Global Investors report owning?

The filing reports 6,552,691 shares of IDEAYA common stock are beneficially owned by Capital Research Global Investors.

What percentage of IDEAYA does CRGI's holding represent?

The reported ownership equals 7.5% of the 87,581,963 shares the filing states are outstanding.

Does CRGI have voting or dispositive power over the reported shares?

Yes. The filing states CRGI has sole voting power of 6,552,691 shares and sole dispositive power of 6,552,691 shares; shared powers are reported as 0.

Is this a Schedule 13G or 13D filing and what does that mean?

This is a Schedule 13G filing and it includes a certification that the securities were acquired and are held in the ordinary course of business and not to change or influence control.

On whose behalf are some shares held according to the filing?

The filing identifies SMALLCAP World Fund, Inc. as an account on behalf of which shares are held.