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STK-012

Phase 1

Advanced Solid Tumor | Small molecule | Oncology |Merck & Company, Inc.|Last Updated: Jul 10, 2026

Success Probability

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Trial Design

RandomizedACTIVE_CONTROLLEDDMCBiomarker
Total Trials1
Total Enrollment364

FDA Designations

No designations recorded

Clinical trial landscape

STK-012 · 1 trial · 4 indications

Phase 1 1
NCT05098132Study of STK-012 Alone and With Other Treatments in Patients With Advanced Lung Cancer and Other CancersAdvanced Solid Tumor
RECRUITING364 Analytics
PHASE1RECRUITING
Study of STK-012 Alone and With Other Treatments in Patients With Advanced Lung Cancer and Other Cancers
Advanced Solid TumorUnlock trial analytics

Study Endpoints

Primary Endpoints

Phase 1a: Treatment emergent adverse events (TEAEs)
From 1st dose of study treatment through 90 days after last dose

Incidence of TEAEs in participants with select advanced solid tumors

Phase 1a: Serious adverse events (SAEs)
From 1st dose of study treatment through 90 days after last dose

Incidence of SAEs in participants with select advanced solid tumors

Phase 1a: Dose limiting toxicities (DLTs)
Cycle 1, Days 1 through 21

Incidence of DLTs in participants with select advanced solid tumors

Phase 1a: Deaths
From 1st dose of study treatment until death, up to 4 years

Incidence of death in participants with select advanced solid tumors

Phase 1b: TEAEs at the RP2D
From 1st dose of study treatment through 90 days after last dose

Incidence of TEAEs at the recommended phase 2 dose (RP2D) in participants with select advanced solid tumors

Phase 1b: SAEs at the RP2D
From 1st dose of study treatment through 90 days after last dose

Incidence of SAEs at the RP2D in participants with select advanced solid tumors

Phase 1b: Deaths at the RP2D
From 1st dose of study treatment until death, up to 4 years

Incidence of death at the RP2D in participants with select advanced solid tumors

Phase 2: Overall response rate (ORR) in Arm A versus Arm C
From randomization until disease progression or death, or the last evaluable assessment in the absence of progression, up to 4 years

To compare the ORR in 1L NSQ NSCLC (PD-L1\<1% or STK11m) subjects treated with STK-012 2.25 mg + SoC vs. SoC (Arms A vs. C). ORR is the proportion of subjects with confirmed complete response (CR) or confirmed partial response (PR) per BICR.

Secondary Endpoints

Phase 1: ORR
From enrollment until disease progression or death, or the last evaluable assessment in the absence of progression, up to 4 years
Phase 1: Progression free survival (PFS)
From enrollment until first documentation of disease progression per investigator assessment or death due to any cause, whichever occurs first, up to 4 years
Phase 1: Overall survival (OS)
From enrollment until death due to any cause, up to 4 years
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Study Design & Arms

AllocationRANDOMIZED
MaskingNONE
ModelPARALLEL
PurposeTREATMENT

Treatment Arms

ArmTypeDescription
Phase 1a: STK-012 monotherapy dose escalationEXPERIMENTALSTK-012 subcutaneous (SC) as monotherapy in selected solid tumor indications
Phase 1a: STK-012 + pembrolizumab dose escalationEXPERIMENTALSTK-012 SC + pembrolizumab intravenously (IV) in selected solid tumor indications
Phase 1a: STK-012 + standard of care (SoC) dose escalationEXPERIMENTALSTK-012 SC + SoC IV in first-line non-squamous (NSQ) NSCLC
Phase 1b: STK-012 monotherapy expansionEXPERIMENTALSTK-012 SC monotherapy in selected solid tumor indications
Phase 1b: STK-012 + pembrolizumab dose expansionEXPERIMENTALSTK-012 SC will be administered in combination with pembrolizumab IV in selected solid tumor indications
Phase 1b: STK-012 + SoC dose expansionEXPERIMENTALSTK-012 SC + SoC IV in first-line PD-L1 negative NSQ NSCLC
Phase 2: Arm AEXPERIMENTALSTK-012 2.25 mg SC Q3W + SoC IV in first-line PD-L1 negative or STK11 mutated, NSQ NSCLC
Phase 2: Arm BEXPERIMENTALSTK-012 1.5 mg SC Q3W + SoC IV in first-line PD-L1 negative or STK11 mutated, NSQ NSCLC
Phase 2: Arm CACTIVE_COMPARATORSoC IV in first-line PD-L1 negative or STK11 mutated, NSQ NSCLC

Interventions

NameTypeDescription
STK-012DRUGEngineered Interleukin-2 (IL-2) selective for antigen activated T cells
pembrolizumab KEYTRUDA®DRUGanti-PD-1 monoclonal antibody
pemetrexedDRUGchemotherapy
carboplatinDRUGchemotherapy
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Eligibility Criteria

Age Range18 Years to N/A
SexALL
Healthy VolunteersNo
Study Sites47

Selected Inclusion Criteria: 1. Phase 1: Selected advanced solid tumors 2. Phase 2: * Diagnosis of non-small cell lung cancer (NSCLC). * Stage IV or Stage IIIB/IIIC and not a candidate for definitive treatment. * Non-squamous (NSQ) cell histology. * No prior systemic therapy for advanc...

Countries:United StatesGeorgiaIrelandSpain
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Competitive Landscape -Other Solid Tumors 9 trials (matched to "Advanced Solid Tumor")

Frequently asked questions about STK-012

What is STK-012 used for in advanced solid tumors?

STK-012 is an investigational small molecule being studied for the treatment of advanced solid tumors, including non-small cell lung cancer (NSCLC). It is currently in Phase 1 clinical development and is being evaluated alone and in combination with other treatments in patients with advanced lung cancer and other cancers.

What does STK-012 target?

STK-012 is a small molecule, but its specific molecular target has not been disclosed. It is being studied in biomarker-selected patients with advanced solid tumors, including non-small cell lung cancer, to assess its safety and efficacy as a monotherapy and in combination with other treatments.

Who makes STK-012?

STK-012 is being developed by Merck & Company, Inc., a pharmaceutical company traded on the New York Stock Exchange under the ticker symbol MRK. The drug is currently in Phase 1 clinical trials for advanced solid tumors.

What phase is STK-012 in?

STK-012 is in Phase 1 clinical development. It is an investigational drug and has not been approved by regulatory authorities. A Phase 1 study is currently recruiting participants to evaluate the drug alone and with other treatments in patients with advanced solid tumors.

What clinical trials is STK-012 in?

STK-012 is being studied in a Phase 1 clinical trial with the identifier NCT05098132. This trial is recruiting patients with advanced solid tumors, including non-small cell lung cancer, and is being conducted in the United States, Georgia, Ireland, and Spain. The study is randomized and active-controlled.