Phase III Hepcidin Mimetic Rusfertide (PTG-300) in Patients with Polycythemia Vera

Main Inclusion Criteria: All subjects must meet ALL of the following inclusion criteria to be enrolled. There are additional inclusion criteria.

* Male and female subjects aged 18 (or the country specific minimum age of consent \>18) years or older.
* Meet revised 2016 World Health Organization (WHO) criteria for the diagnosis of polycythemia vera.
* At least 3 phlebotomies due to inadequate hematocrit control in 6 months before randomization or at least 5 phlebotomies due to inadequate hematocrit control in 1 year before randomization.
* CBC values immediately prior to randomization:

1. Hematocrit \<45%,
2. WBC 4000/μL to 20,000/μL (inclusive), and
3. Platelets 100,000/μL to 1,000,000/μL (inclusive)
* Subjects receiving cytoreductive therapy at randomization must be on a stable PV therapy regimen.
* Subjects treated with phlebotomy alone at randomization must have stopped cytoreductive therapy 2 to 6 months before screening.

Main Exclusion Criteria: Subjects must meet NONE of the following exclusion criteria to be enrolled. There are additional exclusion criteria.

* Clinically meaningful laboratory abnormalities at Screening.
* Subjects who require phlebotomy at hematocrit levels lower than 45%.
* Clinically significant thrombosis (e.g., deep vein thrombosis or splenic vein thrombosis) within 2 months prior to randomization.
* Active or chronic bleeding within 2 months prior to randomization.
* History of invasive malignancies within the last 5 years, except localized cured prostate cancer and cervical cancer.
* Subjects with in situ or stage 1 squamous cell carcinoma of the skin, in situ or stage 1 basal cell carcinoma of the skin, or in situ melanoma of the skin identified during screen unless the cancer is adequately treated before randomization.
* Received Busulfan, Pipobroman or 32Phosphorus within 7 months prior to screening.