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Spevatamig

Phase 1

Gastric or Gastroesophageal Junction Adenocarcinoma | Small molecule | Oncology |Merck & Company, Inc.|Last Updated: Jul 9, 2026

Target and mechanism

ModalitySmall molecule

Also known as Spevatamig (PT886)

Success Probability

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Market & Valuation

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Trial Design

CONTROLLEDDMCBiomarker
Total Trials1
Total Enrollment258

FDA Designations

ORPHAN_DRUGFAST_TRACK

Clinical trial landscape

Spevatamig · 1 trial · 3 indications

Phase 1 1
NCT05482893Spevatamig (PT886) as Monotherapy or in Combination With Chemo and/or ICI, for the Treatment of Patients With Advanced Gastric, Gastroesophageal Junction, Pancreatic Ductal or Biliary Tract Carcinomas (the TWINPEAK Study)Gastric or Gastroesophageal Junction Adenocarcinoma
RECRUITING258 Analytics
PHASE1RECRUITING
Spevatamig (PT886) as Monotherapy or in Combination With Chemo and/or ICI, for the Treatment of Patients With Advanced Gastric, Gastroesophageal Junction, Pancreatic Ductal or Biliary Tract Carcinomas (the TWINPEAK Study)
Gastric or Gastroesophageal Junction AdenocarcinomaUnlock trial analytics

Study Endpoints

Primary Endpoints

To evaluate the safety and tolerability of Spevatamig (PT886) as monotherapy and in each individual combination substudy.
Through study completion, an average of 2 years
To evaluate anti-tumor activity of PT886 as assessed by ORR, in Spevatamig (PT886) monotherapy and in each combination substudy.
Through study completion.
To determine the recommended dose for expansion of Spevatamig (PT886) monotherapy.
Through study completion.

Secondary Endpoints

To evaluate the pharmacokinetics of Spevatamig (PT886).
Through study completion, an average of 2 years
To evaluate the immunogenicity (ADA) of Spevatamig (PT886).
Through study completion, an average of 2 years
To evaluate anti-tumor activity as assessed by additional measures other than ORR, in Spevatamig (PT886) monotherapy and in each combination substudy.
Through study completion, an average of 2 years
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Study Design & Arms

AllocationNON_RANDOMIZED
MaskingNONE
ModelSEQUENTIAL
PurposeTREATMENT

Treatment Arms

ArmTypeDescription
Dose EscalationEXPERIMENTALAn accelerated titration design will be employed for early dose levels, followed by the standard 3+3 design at higher dose levels.
Dose ExpansionEXPERIMENTALTwo dose levels will be explored; the recommended dose for expansion (RDE) from Part A, and another dose level.
Combination Expansion with ChemotherapyEXPERIMENTALPart C, substudy C1: 2L m/a GC/GEJ-C patients will receive Spevatamig (PT886) in combination with Paclitaxel. Part C, substudy C2: 1L m/a PDAC patients will receive Spevatamig (PT886) in combination with Gemcitabine plus nab-Paclitaxel (Abraxane). Part C, substudy C3: 1L m/a PDAC patients will receive Spevatamig (PT886) in combination with Gemcitabine plus FOLFIRINOX/mFFX. Part C, substudy C4: 2L BTC patients will receive PT886 in combination with SOC chemotherapy mFOLFOX6.
Combination Expansion with KEYTRUDA® (pembrolizumab)EXPERIMENTALPart D, substudy D3: 2L or 3L m/a GC/GEJ-C patients will receive Spevatamig (PT886) in combination with KEYTRUDA® (pembrolizumab). Part D, substudy D4: 1L HER2 negative m/a GC/GEJ-C patients will receive Spevatamig (PT886) in combination with SOC chemotherapy and KEYTRUDA® (pembrolizumab).

Interventions

NameTypeDescription
Spevatamig (PT886)DRUGSpevatamig (PT886) monotherapy, a novel bispecific antibody that targets Claudin 18.2 and CD47.
PaclitaxelDRUGChemotherapy as a combination partner to Spevatamig (PT886) in Part C: substudy C1
GemcitabineDRUGChemotherapy as a combination partner to Abraxane and Spevatamig (PT886) in Part C: substudy C2
AbraxaneDRUGChemotherapy as a combination partner to Gemcitabine and Spevatamig (PT886) in Part C: substudy C2
KEYTRUDA® (pembrolizumab)DRUGImmune checkpoint inhibitor as a combination partner to Spevatamig (PT886) in Part D.
FOLFOXDRUGChemotherapy as a combination partner to Spevatamig (PT886) and KEYTRUDA® (pembrolizumab, Part D only)
CAPOXDRUGChemotherapy as a combination partner to KEYTRUDA® (pembrolizumab) and Spevatamig (PT886)
FOLFIRINOXDRUGChemotherapy as a combination partner to Spevatamig (PT886) in Part C: substudy C3
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Eligibility Criteria

Age Range18 Years to N/A
SexALL
Healthy VolunteersNo
Study Sites11

Key Inclusion Criteria 1. 18 years or older and able to sign informed consent and comply with the protocol. 2. Measurable disease as defined by RECIST V1.1 criteria for solid tumors. 3. 3\. Part A and Part B: Histologically or cytologically confirmed unresectable advanced or metastatic solid gastri...

Countries:United States
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Frequently asked questions about Spevatamig

What is Spevatamig used for?

Spevatamig is an investigational small molecule being developed for the treatment of gastric or gastroesophageal junction adenocarcinoma. It is also being studied in pancreatic ductal adenocarcinoma and biliary tract cancer. The drug is currently in Phase 1 clinical development and has not been approved by the FDA.

What does Spevatamig target?

Spevatamig is a small molecule, but its specific molecular target has not been disclosed in the available information. The drug is being evaluated in oncology indications, including gastric and gastroesophageal junction adenocarcinoma, pancreatic ductal adenocarcinoma, and biliary tract cancer.

Who makes Spevatamig?

Spevatamig is being developed by Merck & Company, Inc., which is publicly traded under the ticker symbol MRK. The company is conducting clinical trials to evaluate the drug's safety and efficacy in patients with advanced solid tumors.

What phase is Spevatamig in?

Spevatamig is in Phase 1 clinical development. It is an investigational drug and has not received FDA approval. The drug has been granted orphan drug and fast track designations by the FDA, reflecting its potential to address unmet medical needs in certain cancers.

What clinical trials is Spevatamig in?

Spevatamig is being studied in the TWINPEAK study (NCT05482893), a Phase 1 trial evaluating the drug as monotherapy or in combination with chemotherapy and/or immune checkpoint inhibitors. The trial is recruiting patients with advanced gastric, gastroesophageal junction, pancreatic ductal, or biliary tract carcinomas in the United States.

Is Spevatamig the same as PT886?

Yes, Spevatamig is also known as PT886. Both names refer to the same investigational drug being developed by Merck & Company, Inc. for the treatment of certain gastrointestinal cancers.