TheraRadar
Landscape Oncology

Merkel Cell Carcinoma Clinical Trial Landscape

Data updated: May 20, 2026

101 clinical trials tracked since 2008

Merkel Cell Carcinoma is being studied across 101 clinical trials registered since 2008, with 52 programs currently active. The competitive pipeline includes 4 active Phase 3 trials, 36 active Phase 2 trials, and 24 active Phase 1 trials. Top industry sponsors include TuHURA Biosciences, Inc., ImmunityBio, Inc., AstraZeneca.

52 active
/
101 total (since 2008)
24
Phase 1 Active
55 total
36
Phase 2 Active
65 total
4
Phase 3 Active
6 total
0
Phase 4 Active
0 total

Top Industry Sponsors

Sorted by active Active Done Failed
TuHURA Biosciences, Inc. 2 1 0
ImmunityBio, Inc. 1 0 3
AstraZeneca 1 0 0
Replimune, Inc. 1 0 0
KaliVir Immunotherapeutics 1 0 0

+ 10 more sponsors — see full table below

Featured Phase 3 Trials

NCT03712605 ACTIVE NOT RECRUITING
Testing Pembrolizumab Versus Observation in Patients With Merkel Cell Carcinoma After Surgery, STAMP Trial
National Cancer Institute (NCI) n=280
NCT03271372 ACTIVE NOT RECRUITING
Adjuvant Avelumab in Merkel Cell Cancer
University of Washington n=101
NCT06947928 RECRUITING
Placebo-Controlled Trial of IFx-Hu2.0 Followed By Pembrolizumab In Checkpoint Inhibitor Naïve Participants With Advanced Or Metastatic Merkel Cell Carcinoma
TuHURA Biosciences, Inc. n=118
NCT05078047 RECRUITING
Study Comparing the Standard Administration of IO Versus the Same IO Administered Each 3 Months in Patients in Response After 6 Months of Standard IO
UNICANCER n=646
NCT04157985 COMPLETED
Evaluating Length of Treatment With PD-1/PD-L1 Inhibitor in Advanced Solid Tumors
Dan Zandberg n=161

+ 1 more Phase 3 trials — see full database below

Merkel Cell Carcinoma — Trials Started by Year (last 10 years)

2016
2
2017
7
2018
9
2019
12
2020
10
2021
12
2022
6
2023
12
2024
4
2025
7
2026
5

TheraRadar.com

Full Trial Database

Complete sponsor table, every trial across all phases, plus competitive analytics. Sortable, filterable, exportable for Pro users.

Top Sponsors (all-time)

TuHURA Biosciences, Inc.
3
ImmunityBio, Inc.
4
AstraZeneca
1
Replimune, Inc.
1
KaliVir Immunotherapeutics
1
Neonc Technologies, Inc.
1
Phio Pharmaceuticals Inc.
1
SystImmune Inc.
1
Sotio Biotech Inc.
1
Fujifilm Pharmaceuticals U.S.A., Inc.
1

Active Trials by Phase

Phase 1
24
Phase 2
36
Phase 3
4

Enrollment Size Distribution

1-50
59
51-200
33
201-500
4
501-1k
1
1k+
0

All Industry Sponsors

Sorted by active Active Done Failed
TuHURA Biosciences, Inc. 2 1 0
ImmunityBio, Inc. 1 0 3
AstraZeneca 1 0 0
Replimune, Inc. 1 0 0
KaliVir Immunotherapeutics 1 0 0
Neonc Technologies, Inc. 1 0 0
Phio Pharmaceuticals Inc. 1 0 0
SystImmune Inc. 1 0 0
Sotio Biotech Inc. 1 0 0
Fujifilm Pharmaceuticals U.S.A., Inc. 1 0 0
Memgen, Inc. 1 0 0
Sensei Biotherapeutics, Inc. 1 0 0
Medicenna Therapeutics, Inc. 1 0 0
Checkpoint Therapeutics, Inc. 1 0 0
ImaginAb, Inc. 1 0 0
NCT03712605 ACTIVE NOT RECRUITING
Testing Pembrolizumab Versus Observation in Patients With Merkel Cell Carcinoma After Surgery, STAMP Trial
National Cancer Institute (NCI) n=280
NCT03271372 ACTIVE NOT RECRUITING
Adjuvant Avelumab in Merkel Cell Cancer
University of Washington n=101
NCT06947928 RECRUITING
Placebo-Controlled Trial of IFx-Hu2.0 Followed By Pembrolizumab In Checkpoint Inhibitor Naïve Participants With Advanced Or Metastatic Merkel Cell Carcinoma
TuHURA Biosciences, Inc. n=118
NCT05078047 RECRUITING
Study Comparing the Standard Administration of IO Versus the Same IO Administered Each 3 Months in Patients in Response After 6 Months of Standard IO
UNICANCER n=646
NCT04157985 COMPLETED
Evaluating Length of Treatment With PD-1/PD-L1 Inhibitor in Advanced Solid Tumors
Dan Zandberg n=161
NCT03783078 COMPLETED
Pembrolizumab (MK-3475) as First-line Therapy for Advanced Merkel Cell Carcinoma (MK-3475-913)
Merck Sharp & Dohme LLC n=55

Full Merkel Cell Carcinoma Pipeline

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Data: ClinicalTrials.gov · Trials registered 2008 onwards · Industry sponsors only