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Enzelkitug

Phase 1

Locally Advanced or Metastatic Solid Tumors | Small molecule | Oncology |Roche Holding AG|Last Updated: Aug 6, 2026

Success Probability

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Market & Valuation

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Trial Design

CONTROLLED
Total Trials1
Total Enrollment165

FDA Designations

No designations recorded

Clinical trial landscape

Enzelkitug · 1 trial · 12 indications

Phase 1 1
NCT05581004A Study to Evaluate the Safety, Pharmacokinetics, and Activity of Enzelkitug as a Single Agent and in Combination With Checkpoint Inhibitor in Participants With Locally Advanced or Metastatic Solid TumorsLocally Advanced or Metastatic Solid Tumors
ACTIVE NOT_RECRUITING165 Analytics
PHASE1ACTIVE NOT_RECRUITING
A Study to Evaluate the Safety, Pharmacokinetics, and Activity of Enzelkitug as a Single Agent and in Combination With Checkpoint Inhibitor in Participants With Locally Advanced or Metastatic Solid Tumors
Locally Advanced or Metastatic Solid TumorsUnlock trial analytics

Study Endpoints

Primary Endpoints

Phase Ia: Number of Participants With Dose-limiting Toxicities (DLTs)
From Day 1 to Day 21 of Cycle 1 (21 days from date of first dose of study treatment) (1 Cycle=21 days)
Phase Ib: Number of Participants With DLTs
From Day 1 to Day 21 of Cycle 1 (21 days from date of first dose of study treatment) (1 Cycle=21 days)
Phase Ia: Number of Participants With Treatment-emergent Adverse Events (TEAEs)
Up to approximately 52 months
Phase Ib: Number of Participants With TEAEs
Up to approximately 52 months

Secondary Endpoints

Phase Ia and Phase Ib: Maximum Serum Concentration (Cmax) of Enzelkitug
From Cycle 1 (each cycle is 21 days) Day 1, and at multiple timepoints up to each follow-up visits (up to approximately 52 months)
Phase Ia and Phase Ib: Objective Response Rate (ORR)
From Cycle 1(each cycle is 21 days) Day 1, until disease progression, death, or end of study (up to approximately 52 months)
Phase Ia and Phase Ib: Duration of Response (DOR)
From Cycle 1 (each cycle is 21 days) Day 1, until disease progression, death, or end of study (up to approximately 52 months)
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Study Design & Arms

AllocationNON_RANDOMIZED
MaskingNONE
ModelSEQUENTIAL
PurposeTREATMENT

Treatment Arms

ArmTypeDescription
Phase Ia: Dose EscalationEXPERIMENTALParticipants in successive cohorts will receive escalating doses of enzelkitug, as an intravenous (IV) infusion on Day 1 of each 21-day cycle until disease progression or unacceptable toxicity.
Phase Ia: ExpansionEXPERIMENTALParticipants with select solid tumors will receive a recommended dose of enzelkitug, determined in Phase Ia dose escalation phase as an IV infusion on Day 1 of each 21-day cycle until disease progression or unacceptable toxicity.
Phase Ib: Dose EscalationEXPERIMENTALParticipants in successive cohorts will receive escalating doses of enzelkitug, as an IV infusion, in combination with a fixed dose of atezolizumab, as an IV infusion on Day 1 of each 21-day cycle until disease progression or unacceptable toxicity.
Phase Ib: ExpansionEXPERIMENTALParticipants with select solid tumors will receive a recommended dose of enzelkitug, determined in Phase Ib dose escalation phase, as an IV infusion, in combination with a fixed dose of atezolizumab or pembrolizumab, as an IV infusion on Day 1 of each 21-day cycle until disease progression or unacceptable toxicity.

Interventions

NameTypeDescription
EnzelkitugDRUGEnzelkitug will be administered as per the schedule specified in the respective arms.
AtezolizumabDRUGAtezolizumab will be administered as per the schedule specified in the respective arms.
PembrolizumabDRUGPembrolizumab will be administered as per the schedule specified in the respective arms.
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Eligibility Criteria

Age Range18 Years to N/A
SexALL
Healthy VolunteersNo
Study Sites36

Inclusion Criteria: * Life expectancy of at least 12 weeks * Eastern Cooperative Oncology Group (ECOG) performance status of 0 or 1 * Measurable disease according to Response Evaluation Criteria in Solid Tumors Version 1.1 (RECIST v1.1) * Histologically confirmed locally advanced, recurrent, or met...

Countries:United StatesAustraliaBelgiumCanadaGreeceNetherlandsSouth KoreaSpainSwedenTaiwan
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Recent Changes (Last 90 Days)

HIGHAug 6, 2026NCT05581004Status: RECRUITING → ACTIVE_NOT_RECRUITING
HIGHAug 6, 2026NCT05581004Status: RECRUITING → ACTIVE_NOT_RECRUITING
LOWJul 7, 2026NCT05581004lastUpdatePostDate: changed
LOWJul 7, 2026NCT05581004lastUpdatePostDate: changed

Frequently asked questions about Enzelkitug

What is Enzelkitug used for?

Enzelkitug is an investigational small molecule being developed for the treatment of locally advanced or metastatic solid tumors. It is being studied as a single agent and in combination with a checkpoint inhibitor in participants with various solid tumor types, including NSCLC, HNSCC, melanoma, TNBC, esophageal cancer, gastric cancer, cervical cancer, colorectal cancer, urothelial carcinoma, clear cell RCC, and HCC.

Who makes Enzelkitug?

Enzelkitug is being developed by Roche Holding AG, which trades under the ticker RHHBY. The company is conducting clinical trials to evaluate the safety, pharmacokinetics, and activity of this investigational drug in patients with locally advanced or metastatic solid tumors.

What phase is Enzelkitug in?

Enzelkitug is currently in Phase 1 clinical development. It is an investigational drug and has not been approved by regulatory authorities. The ongoing Phase 1 study is active but not recruiting participants, with a planned enrollment of 165 patients.

What clinical trials is Enzelkitug in?

Enzelkitug is being evaluated in a Phase 1 clinical trial with the identifier NCT05581004. This study is assessing the safety, pharmacokinetics, and activity of Enzelkitug as a single agent and in combination with a checkpoint inhibitor in participants with locally advanced or metastatic solid tumors.

Is Enzelkitug the same as any other drug?

No alternative names for Enzelkitug have been identified. It is a distinct investigational small molecule being developed by Roche Holding AG for the treatment of locally advanced or metastatic solid tumors.