IDEAYA Biosciences, Inc.

UNITED STATES

SECURITIES AND EXCHANGE COMMISSION

Washington, D.C. 20549

FORM 10-Q

(Mark One)

For the quarterly period ended September 30,2026

OR

For the transition period from to

Commission File Number:001-38915

(Exact name of registrant as specified in its charter)

(650)443-6209

(Registrant's telephone number, including area code)

Securities registered pursuant to Section 12(b) of the Act:

Indicate by check mark whether the registrant (1) has filed all reports required to be filed by Section 13 or 15(d) of the Securities Exchange Act of 1934 during the preceding 12 months (or for such shorter period that the registrant was required to file such reports), and (2) has been subject to such filing requirements for the past 90 days. Yes ☒ No ☐

Indicate by check mark whether the registrant has submitted electronically every Interactive Data File required to be submitted pursuant to Rule 405 of Regulation S-T (§ 232.405 of this chapter) during the preceding 12 months (or for such shorter period that the registrant was required to submit such files). Yes ☒ No ☐

Indicate by check mark whether the registrant is a large accelerated filer, an accelerated filer, a non-accelerated filer, a smaller reporting company, or an emerging growth company. See the definitions of “large accelerated filer,” “accelerated filer,” “smaller reporting company,” and “emerging growth company” in Rule 12b-2 of the Exchange Act.

If an emerging growth company, indicate by check mark if the registrant has elected not to use the extended transition period for complying with any new or revised financial accounting standards provided pursuant to Section 13(a) of the Exchange Act. ☐

Indicate by check mark whether the registrant is a shell company (as defined in Rule 12b-2 of the Exchange Act). Yes ☐ No☒

As of October 30, 2026, the registrant had 96,694,575 shares of common stock, $0.0001 par value per share, outstanding.

NOTE REGARDING FORWARD-LOOKING STATEMENTS

This Quarterly Report on Form 10-Q contains forward-looking statements. We intend such forward-looking statements to be covered by the safe harbor provisions for forward-looking statements contained in Section 27A of the Securities Act of 1933, as amended (the “Securities Act”), and Section 21E of the Securities Exchange Act of 1934, as amended (the “Exchange Act”). All statements other than statements of historical facts contained in this Form 10-Q, including statements regarding our future results of operations and financial position, business strategy, prospective products, product approvals, research and development costs, timing and likelihood of success, plans and objectives of management for future operations, and the anticipated results of our products and product candidates, are forward-looking statements. These statements involve known and unknown risks, uncertainties and other important factors that may cause our actual results, performance or achievements to be materially different from any future results, performance or achievements expressed or implied by the forward-looking statements.

In some cases, you can identify forward-looking statements by terms such as “may,” “will,” “should,” “expect,” “plan,” “anticipate,” “could,” “intend,” “target,” “project,” “contemplate,” “believe,” “estimate,” “predict,” “potential” or “continue” or the negative of these terms or other similar expressions. The forward-looking statements in this Quarterly Report on Form 10-Q are only predictions. We have based these forward-looking statements largely on our current expectations and projections about future events and financial trends that we believe may affect our business, financial condition and results of operations. These forward-looking statements speak only as of the date of this Quarterly Report on Form 10-Q and are subject to a number of risks, uncertainties and assumptions described under the sections in this Quarterly Report on Form 10-Q entitled “Risk Factors” and “Management’s Discussion and Analysis of Financial Condition and Results of Operations” and elsewhere in this Quarterly Report on Form 10-Q. These forward-looking statements are subject to numerous risks, including, without limitation, the following:

•

the scope, progress, results and costs of developing our product candidates or any other future product candidates, and conducting preclinical studies and clinical trials, including those of our following product candidates: darovasertib (PKC), IDE397 (MAT2A), IDE849 (DLL3), IDE161 (PARG), IDE892 (PRMT5), IDE034 (B7H3/PTK7), and IDE574 (KAT6/7);

•

the potential clinical utility and tolerability of our product candidates;

•

our clinical and regulatory development plans;

•

the scope, progress, results and costs related to the research and development of our precision medicine target and biomarker discovery platform, including costs related to the development of our proprietary libraries and database of tumor genetic information and specific cancer-target dependency networks;

•

our expectations about the impact of macroeconomic developments, such as health epidemics or pandemics, macroeconomic uncertainties, social unrest, geopolitical hostilities, natural disasters or other catastrophic events, on our business and operations, including clinical trials, manufacturing suppliers and collaborators, and on our results of operations and financial condition;

•

the availability of companion diagnostics for biomarkers associated with our product candidates and any future product candidates, or the cost of coordinating and/or collaborating with certain diagnostic companies for the manufacture and supply of companion diagnostics;

•

the timing of and costs involved in obtaining and maintaining regulatory approval (or certification in certain foreign jurisdictions) for any current or future product candidates and companion diagnostics, and any related restrictions, limitations, and/or warnings in the label of an approved product candidate;

•

our expectations regarding the potential market size and size of the potential patient populations for darovasertib, IDE397, IDE849, IDE161, IDE892, IDE034, IDE574, our other product candidates and any future product candidates, if approved for commercial use;

•

the timing and amount of any milestone, royalty or other payments we may or may not receive pursuant to any current or future collaboration or license agreement, including under our License Agreement with Les Laboratoires Servier (Servier License Agreement);

•

our ability to maintain existing, and establish new, strategic collaborations, licensing or other arrangements and the financial terms of any such agreements, including our Clinical Study Supply and Collaboration Agreement with AstraZeneca plc (AstraZeneca), our Clinical Study Supply and Collaboration Agreement with F. Hoffmann-La Roche Ltd. (Roche), our Clinical Study Supply and Collaboration Agreement with Genentech, Inc. (Genentech), our Clinical Trial Collaboration and Supply Agreements with Pfizer, Inc. (Pfizer), our License Agreement with Novartis, our Option and License Agreement with Cancer Research Technology Ltd. and the University of Manchester, our Option and License Agreement with Biocytogen Pharmaceuticals (Beijing) Co. Ltd. (Biocytogen), our License Agreement with Jiangsu Hengrui Pharmaceuticals Co., Ltd. (Hengrui Pharma), and our License Agreement with Les Laboratories Servier (Servier);

•

the timing of commencement of future nonclinical studies and clinical trials and research and development programs;

•

our ability to acquire, discover, develop and advance product candidates into, and successfully complete, clinical trials;

•

our intentions and our ability to establish collaborations and/or partnerships;

•

the timing or likelihood of regulatory filings and approvals for our product candidates;

•

our commercialization, marketing and manufacturing capabilities and expectations;

•

our intentions with respect to the commercialization of our product candidates;

•

the pricing and reimbursement of our product candidates, if approved;

•

the implementation of our business model and strategic plans for our business, product candidates and technology platforms, including additional indications that we may pursue;

•

the scope of protection we are able to establish and maintain for intellectual property rights covering our product candidates, including the projected terms of patent protection;

•

our potential involvement in lawsuits in connection with enforcing our intellectual property rights;

•

our potential involvement in third party interference, opposition, derivation or similar proceedings with respect to our patent rights and other challenges to our patent rights and patent infringement claims;

•

estimates of our expenses, future revenue, capital requirements, our needs for additional financing and our ability to obtain additional capital;

•

our future financial performance; and

•

developments and projections relating to our competitors and our industry, including competing therapies and procedures, as well as the competitive position of our product candidates.

Moreover, we operate in an evolving environment. New risk factors and uncertainties may emerge from time to time, and it is not possible for management to predict all risk factors and uncertainties.

Because forward-looking statements are inherently subject to risks and uncertainties, some of which cannot be predicted or quantified and some of which are beyond our control, you should not rely on these forward-looking statements as predictions of future events. The events and circumstances reflected in our forward-looking statements may not occur or be achieved, and actual results could differ materially from those projected in the forward-looking statements. We qualify all of our forward-looking statements by these cautionary statements. Except as required by applicable law, we do not plan to publicly update or revise any forward-looking statements contained herein, whether as a result of any new information, future events, changed circumstances or otherwise.

Form 10-Q for Quarterly Period Ended September 30, 2026

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