Clinical Trials

Key Inclusion Criteria:

* Histologically confirmed World Health Organization (WHO) grade 1, 2, or 3 meningioma.
* Developed recurrent disease or progressive disease (PD) after receiving standard therapy (for example, surgery and/or radiation) or have been deemed ineligible to receive these therapies. At least 1 prior course of meningioma-directed radiotherapy is required, if not contraindicated.
* Radiologically documented progression of any existing tumor (growth \> 15% of the bidimensional enhancing tumor within the prior 6 months or appearance of new lesions (including intra and extracranial manifestations).
* For participants treated with external beam radiation, interstitial brachytherapy, or radiosurgery, an interval ≥ 24 weeks must have elapsed from completion of therapy to initiation of treatment.
* Measurable disease by RANO meningioma criteria as determined by the investigator, obtained ≤ 14 days prior to initiation of treatment.
* Karnofsky performance status (KPS) ≥ 60%.
* Demonstrate adequate organ and marrow function within 14 days of treatment initiation

Key Exclusion Criteria:

* Prior history of hypertensive encephalopathy at any time.
* Extracranial lesions invading major blood vessels including, but not limited to, inferior vena cava, pulmonary artery, or aorta.
* Contraindication to magnetic resonance imaging (MRI).
* Local therapy (surgery and/or radiation therapy) is indicated per investigator
* Receipt of any type of cytotoxic, biologic or other systemic anticancer therapy (including investigational) within 4 weeks or 5 half-lives, whichever is shorter, before initiation of treatment. There is no limit on prior systemic therapies
* Prior Surgery - completed wound healing must occur prior to initiation of treatment; ≥ 8 weeks for major surgery, ≥ 7 days for minor surgery, including stereotactic biopsies.
* The participant has uncontrolled, significant intercurrent or recent illness including, but not limited to, the following conditions:

* Cardiovascular disorders, including uncontrolled hypertension,
* Gastrointestinal (GI) disorders including those associated with a high risk of perforation or fistula formation,
* Clinically significant hematuria, hematemesis, or hemoptysis of \> 0.5 teaspoon (2.5 milliliters \[mL\]) of red blood within 12 weeks before initiation of treatment or other history of significant bleeding (eg, intracranial hemorrhage/bleeding), or
* Other clinically significant disorders.
* Requirement for hemodialysis or peritoneal dialysis.
* History of solid organ or allogeneic stem cell transplant.

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