A Study to Learn About the Medicine Ponsegromab in Adults With Cancer of the Pancreas Which Has Spread and Caused Significant Body Weight Loss and Fatigue

Key inclusion Criteria:

* Signed Informed Consent Document
* Documented active diagnosis of metastatic pancreatic ductal adenocarcinoma
* Cachexia defined by Fearon criteria of weight loss
* Completed 1 x 28-day cycle of first-line systemic nab-paclitaxel and gemcitabine chemotherapy or 2 x 14-day cycles of FOLFIRINOX chemotherapy and prior to receiving Cycle 2 chemotherapy
* ECOG PS ≤1 with life expectancy of at least 4 months

Key Exclusion Criteria:

* Current active reversible causes of decreased food intake
* Cachexia caused by other reasons
* Any prior or current clinical diagnosis of heart failure, irrespective of left ventricular ejection fraction or New York Heart Association classification
* Left ventricular ejection fraction \<50%
* Receiving tube feedings or parenteral nutrition at the time of Screening or Randomization
* History of allergic or anaphylactic reaction to any therapeutic or diagnostic monoclonal antibody
* History of allergy or hypersensitivity to any of the chemotherapeutics or any of their excipients
* Neuroendocrine (carcinoid, islet cell) or acinar pancreatic carcinoma, symptomatic brain metastasis, leptomeningeal disease or other active CNS metastases
* Inadequate liver function
* Renal disease requiring dialysis or eGFR \<30 mL/min/1.73m2