Form 8-K
8-K — IDEAYA Biosciences, Inc.
Accession: 0001193125-26-254476
Filed: 2026-06-03
Period: 2026-06-03
CIK: 0001676725
SIC: 2834 (PHARMACEUTICAL PREPARATIONS)
Item: Other Events
Documents
8-K — d53214d8k.htm (Primary)
XML — IDEA: XBRL DOCUMENT (R1.htm)
8-K
8-K (Primary)
Filename: d53214d8k.htm · Sequence: 1
8-K
false 0001676725 0001676725 2026-06-03 2026-06-03
UNITED STATES
SECURITIES AND EXCHANGE COMMISSION
Washington, D.C. 20549
FORM 8-K
CURRENT REPORT
Pursuant to Section 13 or 15(d)
of the Securities Exchange Act of 1934
Date of Report (Date of earliest event reported): June 3, 2026
IDEAYA Biosciences, Inc.
(Exact name of registrant as specified in its charter)
Delaware
001-38915
47-4268251
(State or other jurisdiction
of incorporation)
(Commission
File Number)
(IRS Employer
Identification Number)
5000 Shoreline Court, Suite 300
South San Francisco, California 94080
(Address of principal executive offices, including Zip Code)
Registrant’s telephone number, including area code: (650) 443-6209
Check the appropriate box below if the Form 8-K filing is intended to simultaneously satisfy the filing obligation of the registrant under any of the following provisions:
☐
Written communications pursuant to Rule 425 under the Securities Act (17 CFR 230.425)
☐
Soliciting material pursuant to Rule 14a-12 under the Exchange Act (17 CFR 240.14a-12)
☐
Pre-commencement communications pursuant to Rule 14d-2(b) under the Exchange Act (17 CFR 240.14d-2(b))
☐
Pre-commencement communications pursuant to Rule 13e-4(c) under the Exchange Act (17 CFR 240.13e-4(c))
Securities registered pursuant to Section 12(b) of the Act:
Title of each class
Trading
Symbol
Name of each exchange
on which registered
Common Stock, $0.0001 par value per share
IDYA
The Nasdaq Global Select Market
Indicate by check mark whether the registrant is an emerging growth company as defined in Rule 405 of the Securities Act of 1933 (§230.405 of this chapter) or Rule 12b-2 of the Securities Exchange Act of 1934 (§240.12b-2 of this chapter).
Emerging growth company ☐
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. ☐
Item 8.01
Other Events.
Clinical Collaboration with Roche in MTAP-Deleted RAS-Mutant Pancreatic Cancer
On June 3, 2026, IDEAYA Biosciences, Inc. (the “Company”) announced it has entered into a clinical collaboration with F. Hoffmann-La Roche Ltd (“Roche”) to evaluate the efficacy and safety of IDE892, its investigational, potential best-in-class PRMT5 inhibitor, in combination with Roche’s RG6505, a pan-RAS inhibitor, in patients with pancreatic ductal adenocarcinoma (“PDAC”) that carry an MTAP deletion. The Company will sponsor the clinical trial combination study, and Roche will supply RG6505.
IDE892 was designed to be a potential best-in-class PRMT5 inhibitor and has demonstrated robust monotherapy regressions in MTAP-deleted preclinical models. The Company is evaluating IDE892 in a Phase 1 dose escalation clinical trial in MTAP-deleted solid tumors and plans to initiate Phase 1 combination cohorts, in PDAC with RG6505 as well as in NSCLC and other solid tumors with IDE397, the Company’s proprietary MAT2A inhibitor.
MTAP deletion is estimated to occur in up to 40% of PDAC and almost all MTAP-deleted PDAC harbor co-occurring RAS mutations. Combining a PRMT5 inhibitor with a pan-RAS inhibitor may have the potential to drive deeper and more durable responses for MTAP-deleted PDAC patients who currently have no approved targeted treatment options.
Under the clinical collaboration, the Company and Roche each retain all commercial rights to their respective compounds, including as monotherapy and as combination therapies. There will be a joint governance process between the Company and Roche to oversee the clinical combination study. The clinical collaboration also has the ability to evaluate a combination triplet with IDE892, RG6505, and IDE397, the Company’s Phase 2 MAT2A inhibitor, upon joint approval from both the Company and Roche.
Forward-Looking Statements
Certain statements contained herein are forward-looking statements, including, but not limited to, statements related to (i) the potential therapeutic benefit, safety, and efficacy of IDE892, alone or in combination with RG6505; (ii) the planned clinical development, including the initiation, timing, progress, and design of clinical trials evaluating IDE892 in combination with RG6505 and other agents; (iii) the potential for IDE892 to be a best-in-class PRMT5 inhibitor; (iv) the potential for combination therapies targeting MTAP-deleted and RAS-mutant tumors to drive deeper or more durable responses; (v) the estimated prevalence of MTAP deletions in PDAC; (vi) the potential benefits of the clinical collaboration with Roche; and (vii) the Company’s broader clinical and strategic plans, including the development of its MTAP-deletion portfolio. Such forward-looking statements involve substantial risks and uncertainties that could cause the Company’s preclinical and clinical development programs, future results, performance or achievements to differ significantly from those expressed or implied by the forward-looking statements. Such risks and uncertainties include, among others, risks related to the success, cost, and timing of the Company’s product candidate development activities and clinical trials; the risk that results from preclinical studies or early clinical trials may not be predictive of future clinical results; risks related to the development and regulatory approval of drug candidates; risks related to the Company’s dependence on third parties, including Roche, for collaboration activities and clinical supply; risks related to the ability to successfully enroll patients in clinical trials; and risks related to the potential for adverse safety events or lack of efficacy. All forward-looking statements are made as of the date hereof, and the Company undertakes no obligation to update any forward-looking statements to reflect new information, future events, or otherwise, except as required by law. For a further description of the risks and uncertainties that could cause actual results to differ from those expressed in these forward-looking statements, as well as risks relating to the business of the Company in general, see the Company’s Annual Report on Form 10-K dated February 17, 2026, the Company’s Quarterly Report on Form 10-Q dated May 5, 2026, and any subsequently filed current and periodic reports filed or furnished with the Securities and Exchange Commission.
SIGNATURES
Pursuant to the requirements of the Securities Exchange Act of 1934, as amended, the registrant has duly caused this report to be signed on its behalf by the undersigned hereunto duly authorized.
IDEAYA BIOSCIENCES, INC.
Date: June 3, 2026
By:
/s/ Yujiro Hata
Yujiro S. Hata
President and Chief Executive Officer
XML — IDEA: XBRL DOCUMENT
XML
Filename: R1.htm · Sequence: 6
v3.26.1
Document and Entity Information
Jun. 03, 2026
Cover [Abstract]
Amendment Flag
false
Entity Central Index Key
0001676725
Document Type
8-K
Document Period End Date
Jun. 03, 2026
Entity Registrant Name
IDEAYA Biosciences, Inc.
Entity Incorporation State Country Code
DE
Entity File Number
001-38915
Entity Tax Identification Number
47-4268251
Entity Address, Address Line One
5000 Shoreline Court
Entity Address, Address Line Two
Suite 300
Entity Address, City or Town
South San Francisco
Entity Address, State or Province
CA
Entity Address, Postal Zip Code
94080
City Area Code
(650)
Local Phone Number
443-6209
Written Communications
false
Soliciting Material
false
Pre Commencement Tender Offer
false
Pre Commencement Issuer Tender Offer
false
Security 12b Title
Common Stock, $0.0001 par value per share
Trading Symbol
IDYA
Security Exchange Name
NASDAQ
Entity Emerging Growth Company
false
X
- Definition
Boolean flag that is true when the XBRL content amends previously-filed or accepted submission.
+ References
No definition available.
+ Details
Name:
dei_AmendmentFlag
Namespace Prefix:
dei_
Data Type:
xbrli:booleanItemType
Balance Type:
na
Period Type:
duration
X
- Definition
Area code of city
+ References
No definition available.
+ Details
Name:
dei_CityAreaCode
Namespace Prefix:
dei_
Data Type:
xbrli:normalizedStringItemType
Balance Type:
na
Period Type:
duration
X
- Definition
Cover page.
+ References
No definition available.
+ Details
Name:
dei_CoverAbstract
Namespace Prefix:
dei_
Data Type:
xbrli:stringItemType
Balance Type:
na
Period Type:
duration
X
- Definition
For the EDGAR submission types of Form 8-K: the date of the report, the date of the earliest event reported; for the EDGAR submission types of Form N-1A: the filing date; for all other submission types: the end of the reporting or transition period. The format of the date is YYYY-MM-DD.
+ References
No definition available.
+ Details
Name:
dei_DocumentPeriodEndDate
Namespace Prefix:
dei_
Data Type:
xbrli:dateItemType
Balance Type:
na
Period Type:
duration
X
- Definition
The type of document being provided (such as 10-K, 10-Q, 485BPOS, etc). The document type is limited to the same value as the supporting SEC submission type, or the word 'Other'.
+ References
No definition available.
+ Details
Name:
dei_DocumentType
Namespace Prefix:
dei_
Data Type:
dei:submissionTypeItemType
Balance Type:
na
Period Type:
duration
X
- Definition
Address Line 1 such as Attn, Building Name, Street Name
+ References
No definition available.
+ Details
Name:
dei_EntityAddressAddressLine1
Namespace Prefix:
dei_
Data Type:
xbrli:normalizedStringItemType
Balance Type:
na
Period Type:
duration
X
- Definition
Address Line 2 such as Street or Suite number
+ References
No definition available.
+ Details
Name:
dei_EntityAddressAddressLine2
Namespace Prefix:
dei_
Data Type:
xbrli:normalizedStringItemType
Balance Type:
na
Period Type:
duration
X
- Definition
Name of the City or Town
+ References
No definition available.
+ Details
Name:
dei_EntityAddressCityOrTown
Namespace Prefix:
dei_
Data Type:
xbrli:normalizedStringItemType
Balance Type:
na
Period Type:
duration
X
- Definition
Code for the postal or zip code
+ References
No definition available.
+ Details
Name:
dei_EntityAddressPostalZipCode
Namespace Prefix:
dei_
Data Type:
xbrli:normalizedStringItemType
Balance Type:
na
Period Type:
duration
X
- Definition
Name of the state or province.
+ References
No definition available.
+ Details
Name:
dei_EntityAddressStateOrProvince
Namespace Prefix:
dei_
Data Type:
dei:stateOrProvinceItemType
Balance Type:
na
Period Type:
duration
X
- Definition
A unique 10-digit SEC-issued value to identify entities that have filed disclosures with the SEC. It is commonly abbreviated as CIK.
+ References
Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher SEC
-Name Exchange Act
-Number 240
-Section 12
-Subsection b-2
+ Details
Name:
dei_EntityCentralIndexKey
Namespace Prefix:
dei_
Data Type:
dei:centralIndexKeyItemType
Balance Type:
na
Period Type:
duration
X
- Definition
Indicate if registrant meets the emerging growth company criteria.
+ References
Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher SEC
-Name Exchange Act
-Number 240
-Section 12
-Subsection b-2
+ Details
Name:
dei_EntityEmergingGrowthCompany
Namespace Prefix:
dei_
Data Type:
xbrli:booleanItemType
Balance Type:
na
Period Type:
duration
X
- Definition
Commission file number. The field allows up to 17 characters. The prefix may contain 1-3 digits, the sequence number may contain 1-8 digits, the optional suffix may contain 1-4 characters, and the fields are separated with a hyphen.
+ References
No definition available.
+ Details
Name:
dei_EntityFileNumber
Namespace Prefix:
dei_
Data Type:
dei:fileNumberItemType
Balance Type:
na
Period Type:
duration
X
- Definition
Two-character EDGAR code representing the state or country of incorporation.
+ References
No definition available.
+ Details
Name:
dei_EntityIncorporationStateCountryCode
Namespace Prefix:
dei_
Data Type:
dei:edgarStateCountryItemType
Balance Type:
na
Period Type:
duration
X
- Definition
The exact name of the entity filing the report as specified in its charter, which is required by forms filed with the SEC.
+ References
Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher SEC
-Name Exchange Act
-Number 240
-Section 12
-Subsection b-2
+ Details
Name:
dei_EntityRegistrantName
Namespace Prefix:
dei_
Data Type:
xbrli:normalizedStringItemType
Balance Type:
na
Period Type:
duration
X
- Definition
The Tax Identification Number (TIN), also known as an Employer Identification Number (EIN), is a unique 9-digit value assigned by the IRS.
+ References
Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher SEC
-Name Exchange Act
-Number 240
-Section 12
-Subsection b-2
+ Details
Name:
dei_EntityTaxIdentificationNumber
Namespace Prefix:
dei_
Data Type:
dei:employerIdItemType
Balance Type:
na
Period Type:
duration
X
- Definition
Local phone number for entity.
+ References
No definition available.
+ Details
Name:
dei_LocalPhoneNumber
Namespace Prefix:
dei_
Data Type:
xbrli:normalizedStringItemType
Balance Type:
na
Period Type:
duration
X
- Definition
Boolean flag that is true when the Form 8-K filing is intended to satisfy the filing obligation of the registrant as pre-commencement communications pursuant to Rule 13e-4(c) under the Exchange Act.
+ References
Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher SEC
-Name Exchange Act
-Number 240
-Section 13e
-Subsection 4c
+ Details
Name:
dei_PreCommencementIssuerTenderOffer
Namespace Prefix:
dei_
Data Type:
xbrli:booleanItemType
Balance Type:
na
Period Type:
duration
X
- Definition
Boolean flag that is true when the Form 8-K filing is intended to satisfy the filing obligation of the registrant as pre-commencement communications pursuant to Rule 14d-2(b) under the Exchange Act.
+ References
Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher SEC
-Name Exchange Act
-Number 240
-Section 14d
-Subsection 2b
+ Details
Name:
dei_PreCommencementTenderOffer
Namespace Prefix:
dei_
Data Type:
xbrli:booleanItemType
Balance Type:
na
Period Type:
duration
X
- Definition
Title of a 12(b) registered security.
+ References
Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher SEC
-Name Exchange Act
-Number 240
-Section 12
-Subsection b
+ Details
Name:
dei_Security12bTitle
Namespace Prefix:
dei_
Data Type:
dei:securityTitleItemType
Balance Type:
na
Period Type:
duration
X
- Definition
Name of the Exchange on which a security is registered.
+ References
Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher SEC
-Name Exchange Act
-Number 240
-Section 12
-Subsection d1-1
+ Details
Name:
dei_SecurityExchangeName
Namespace Prefix:
dei_
Data Type:
dei:edgarExchangeCodeItemType
Balance Type:
na
Period Type:
duration
X
- Definition
Boolean flag that is true when the Form 8-K filing is intended to satisfy the filing obligation of the registrant as soliciting material pursuant to Rule 14a-12 under the Exchange Act.
+ References
Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher SEC
-Name Exchange Act
-Number 240
-Section 14a
-Subsection 12
+ Details
Name:
dei_SolicitingMaterial
Namespace Prefix:
dei_
Data Type:
xbrli:booleanItemType
Balance Type:
na
Period Type:
duration
X
- Definition
Trading symbol of an instrument as listed on an exchange.
+ References
No definition available.
+ Details
Name:
dei_TradingSymbol
Namespace Prefix:
dei_
Data Type:
dei:tradingSymbolItemType
Balance Type:
na
Period Type:
duration
X
- Definition
Boolean flag that is true when the Form 8-K filing is intended to satisfy the filing obligation of the registrant as written communications pursuant to Rule 425 under the Securities Act.
+ References
Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher SEC
-Name Securities Act
-Number 230
-Section 425
+ Details
Name:
dei_WrittenCommunications
Namespace Prefix:
dei_
Data Type:
xbrli:booleanItemType
Balance Type:
na
Period Type:
duration