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Active, not recruitingNCT05899608Updated Oct 8, 2026

Clinical Study of Ivonescimab for First-line Treatment of Metastatic NSCLC Patients

A Phase 3 interventional study of Ivonescimab Injection and Pembrolizumab Injection in Non-Small Cell Lung Cancer, sponsored by Summit Therapeutics. Active, not recruiting at 260 sites in 17 countries. Open to participants aged 18 Years and older. Per ClinicalTrials.gov, last updated 2026-10-08.

Sponsored by Summit Therapeutics · Phase 3, Interventional, and Treatment

Updated Oct 8, 2026Now Active, not recruiting1 site added+1 moreGo to Updates ↓
Phase
Phase 3
Study type
Interventional
Enrollment
1,600
Allocation
Randomized
Ages
18 Years and older
Sex
All
01

Study summary

This is a Phase 3 Randomized, double-blind, Multiregional Study of Ivonescimab Combined with Chemotherapy Versus Pembrolizumab Combined with Chemotherapy for the First-line Treatment of Metastatic Non-small Cell Lung Cancer. The primary endpoint is overall survival and progression free survival assessed by investigator. The key secondary endpoints include response and safety.

Read the detailed description

This study consists of two distinct NSCLC histology cohorts: squamous (N=600) and non-squamous (N=1000), approximately 1600 patients in total. Within each cohort, subjects are randomized in a 1:1 ratio into one of two treatment groups, receiving either ivonescimab or pembrolizumab combined with platinum-doublet chemotherapy. The two histology cohorts will be analyzed independently

02

Conditions studied

  • Non-Small Cell Lung Cancer
03

In context

Carcinoma, Non-Small-Cell Lung

7,620 studies on the registry are indexed under Carcinoma, Non-Small-Cell Lung; 1,838 are open to participants now.

This study's planned enrollment of 1,600 is above the median of 62 across 6,019 interventional studies indexed under Carcinoma, Non-Small-Cell Lung.

Browse Carcinoma, Non-Small-Cell Lung studies →

Lead sponsor

Summit Therapeutics is the lead sponsor of 13 studies on the registry; 4 are open to participants now.

Counted across the registry records on this site, refreshed daily.

04

Who can participate

Ages eligible
18 Years and older
Sexes eligible
All
Accepts healthy volunteers
No

Go through the criteria one by one — yes, no or not sure — and take the list to your doctor or the study team. Kept in this browser only.

Inclusion criteria

  • Age ≥ 18 years old at the time of enrollment
  • (ECOG) performance status score of 0 or 1
  • Expected ≥ 3 months
  • (Stage IV) NSCLC
  • or cytologically confirmed squamous or non-squamous NSCLC
  • Recorded measurement of the Tumor Proportion Score (TPS) or Tumor Cells (TC) for expression, irrespective of the PD-L1 expression, prior to randomization
  • At least one measurable noncerebral lesion according to 1.1
  • No prior systemic treatment for metastatic NSCLC

Exclusion criteria

Exclusion Criteria:

  • Histologic or cytopathologic evidence of the presence of small cell lung carcinoma
  • Known actionable genomic alterations (EGFR, ALK, ROS1, and BRAF V600E) or genes for which approved therapies are available.

    • For non-squamous histology patients, actionable driver mutation testing results are required before randomization.
  • Has received any prior therapy for NSCLC in the setting
  • Tumor invasion, encasement of organs (e.g. pericardium, heart, trachea, esophagus, central bronchi), or major blood vessels (e.g aorta, central veins), if poses a significant increased risk of bleeding.
Terms in these criteria, in plain language(7)

Underlined terms in the criteria open these too. Explained by clinicaltrials.gg, not part of the registry record. The study team decides who can take part.

ECOG performance status

A scale of how much an illness limits everyday activity. For people being assessed to join a study, scores run from 0 (fully active) to 4; lower is more active.

0
Fully active, no restrictions.
1
Limited in strenuous activity, but walking and able to do light work, such as housework or office work.
2
Walking and able to look after yourself, but unable to work; up and about more than half of waking hours.
3
Able to look after yourself only in part; in bed or a chair more than half of waking hours.
4
Unable to look after yourself at all; in bed or a chair all day.

Studies most often ask for 0–1 or 0–2. Your doctor gives the score; the WHO scale uses the same steps. The full scale also has 5, which records death.

Life expectancy

The study doctor’s estimate of how long someone is likely to live. Criteria use it so that people can stay in the study long enough for it to answer its question.

Metastases

Cancer that has spread from where it began to other parts of the body. “Metastatic” cancer is cancer that has spread this way.

Histologically or cytologically confirmed

The diagnosis was confirmed by looking at a sample under a microscope: tissue from a biopsy or surgery (histology), or cells from a fluid or needle sample (cytology).

Your pathology report is the document that shows this.

PD-1, PD-L1 and checkpoint inhibitors

PD-1, PD-L1 and CTLA-4 are proteins that act as brakes on the immune system. Checkpoint inhibitors, such as pembrolizumab or nivolumab, block them so the immune system can attack a cancer.

PD-L1 can also be measured in a tumour sample. Some scores count stained tumour cells only (TPS); others also count certain immune cells (CPS). The study names the score and the minimum it uses.

RECIST

The standard rules for measuring tumours on CT or MRI scans, to tell whether a cancer is shrinking, stable or growing during treatment.

“Measurable disease per RECIST 1.1” usually means at least one tumour 10 mm or more at its longest on a CT scan, or a lymph node 15 mm or more across its short axis.

Line of therapy

A line of therapy is one course of treatment, which may combine several drugs. First-line is the first course given; second-line follows when that stops working or is not tolerated.

“Two prior lines” means two courses that count separately under the study’s rules — not simply two drugs. Ask the study team if you are unsure how yours are counted.

05

Study design

Phase
Phase 3
Primary purpose
Treatment
Allocation
Randomized
Intervention model
Parallel assignment
Masking
Quadruple (Participant, Care provider, Investigator, Outcomes assessor)
Enrollment
1,600 participants (estimated)

Study arms

  • Experimental
    Arm A - Ivonescimab and chemotherapy

    Subject will receive ivonescimab and chemotherapy

    Biological: Ivonescimab Injection

  • Active comparator
    Arm B - Pembrolizumab and chemotherapy

    Subject will receive pembrolizumab and chemotherapy

    Biological: Pembrolizumab Injection

Interventions

06

What researchers measure

Primary outcomes

  1. Overall Survival (OS)

    Overall Survival (OS) in the ITT population

    Time frame: approximately 4 years

  2. Progression Free Survival (PFS)

    Progression Free Survival (PFS) assessed by investigator based on RECIST V1.1

    Time frame: approximately 3 years

Secondary outcomes

  1. Adverse Event (AE)

    incidence and severity of adverse events (AEs) and clinically significant abnormal laboratory test results

    Time frame: From the subject signs the ICF to 30 days (AE) and 90 days (SAE related to ivonescimab/pembrolizumab ) after the last dose of study treatment or initiation of other anticancer therapy, whichever occurs first, up to 2 years.

07

Study locations

260 sites

Showing the first 100 of 260 sites across 17 countries. Choose a country and city above to see the rest.

08

Updates

1 registry update since Sep 25, 2026
Status
Recruiting→Active, not recruiting
changed Oct 8, 2026
Sites
1 site added, 1 site removed
Show site
  • The Cancer institute Hospital of JFCR · Tokyo, Japan
Show 1 removed
  • The Cancer institute Hospital · Tokyo, Japan
Oct 8, 2026
Show all 1 update
  1. Oct 8, 2026
    Recruiting→Active, not recruiting
    1 site added, 1 site removed
    Show site
    • The Cancer institute Hospital of JFCR · Tokyo, Japan
    Show 1 removed
    • The Cancer institute Hospital · Tokyo, Japan
    + 2 other changes: verification date and contact details

From the registry record's own update history. This site started tracking changes on Sep 25, 2026; for anything earlier, see the record history on ClinicalTrials.gov ↗

09

Registry details

Key details

Study ID
NCT05899608
Lead sponsor
Summit Therapeutics
Responsible party
Sponsor
First posted
Jun 12, 2023
Start date
Oct 26, 2023
Primary completion
Dec 31, 2028 (estimated)
Completion
Dec 31, 2029 (estimated)
Last update
Oct 8, 2026

Study contacts

Indu Lal
study director · Summit Therapeutics, Inc.

Oversight

FDA-regulated drug
Yes
FDA-regulated device
No
View the source record on ClinicalTrials.gov ↗

Not currently enrolling

This study is active, not recruiting, as verified in Oct 2026. You cannot join it, but the record below documents what was studied.

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Discussion

Questions and observations about this study, from anyone following it. Not medical advice, and not a channel to the study team — their contact details are on the registry record.

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Studies of the drug tested here: Ivonescimab

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