TG Therapeutics, Inc. (NASDAQ: TGTX), today announced that the U.S. Food and Drug Administration (FDA) has accepted the Company’s New Drug Application (NDA) for umbralisib, the Company’s investigational once-daily, oral, dual inhibitor of PI3K-delta and CK1-epsilon, as a treatment for patients with previously treated marginal zone lymphoma (MZL) who have received at least one prior anti-CD20 based regimen and follicular lymphoma (FL) who have received at least two prior systemic therapies.