GEN1046 Safety Trial in Patients With Malignant Solid Tumors

Key Inclusion Criteria:

For Dose Escalation:

• Have a histologically or cytologically confirmed non-CNS solid tumor that is metastatic or unresectable and for whom there is no available standard therapy

For Expansion:

• Have histologically or cytological confirmed diagnosis of relapsed or refractory, advanced and/or metastatic NSCLC, EC, UC, TNBC, SCCHN, or cervical cancer who are not anymore candidates for standard therapy For separate expansion cohorts: metastatic NSCLC without prior systemic treatment regimens for metastatic disease.

For Both Dose Escalation and Expansion

* Have measurable disease according to RECIST 1.1
* Have Eastern Cooperative Oncology Group (ECOG) 0-1
* Have an acceptable hematological status
* Have acceptable liver function
* Have an acceptable coagulation status
* Have acceptable renal function

Key Exclusion Criteria:

* Have uncontrolled intercurrent illness, including but not limited to:

  * Ongoing or active infection requiring intravenous treatment with anti-infective therapy, or any ongoing systemic inflammatory condition requiring further diagnostic work-up or management during screening.
  * Symptomatic congestive heart failure (Grade III or IV as classified by the New York Heart Association), unstable angina pectoris or cardiac arrhythmia
  * Uncontrolled hypertension defined as systolic blood pressure ≥ 160 mmHg and/or diastolic blood pressure ≥ 100 mmHg, despite optimal medical management
  * Ongoing or recent evidence of autoimmune disease
  * History of irAEs that led to prior checkpoint treatment discontinuation
  * Prior history of myositis, Guillain-Barré syndrome, or myasthenia gravis of any grade
  * History of chronic liver disease or evidence of hepatic cirrhosis
  * History of non-infectious pneumonitis that has required steroids or currently has pneumonitis
  * History of organ allograft (except for corneal transplant) or autologous or allogeneic bone marrow transplant, or stem cell rescue within 3 months prior to the first dose of acasunlimab
  * Serious, non-healing wound, skin ulcer (of any grade), or bone fracture
* Any history of intracerebral arteriovenous malformation, cerebral aneurysm, new (younger than 6 months) or progressive brain metastases or stroke
* Prior therapy:

  * Radiotherapy within 14 days prior to first dose of acasunlimab. Note: palliative radiotherapy will be allowed.
  * Treatment with an anti-cancer agent (within 28 days or after at least 5 half-lives of the drug, whichever is shorter), prior to acasunlimab administration. Accepted exceptions are bisphosphonates (e.g., pamidronate, zoledronic acid, etc.) and denosumab
* Toxicities from previous anti-cancer therapies that have not adequately resolved

NOTE: Other protocol defined Inclusion/Exclusion criteria may apply.