Copanlisib Plus Ibrutinib or Acalabrutinib in R/R CLL

Inclusion Criteria: * Must have a confirmed diagnosis of chronic lymphocytic leukemia or small lymphocytic lymphoma as per 2018 IWCLL criteria with evidence of persistent disease, defined as measurable adenopathy or splenomegaly, circulating disease, or marrow disease * On ibrutinib or acalabrutinib which was instituted due to patient previously meeting 2018 IWCLL criteria for treatment, started at least 6 months prior to study entry for any patient who have received at least one prior line of therapy prior to ibrutinib or acalabrutinib. Reduced dose of ibrutinib or acalabrutinib is allowed as long as the dose has been stable for at least 4 weeks and all toxicities are ≤ grade 1 * Must have achieved either SD, PR or PR-L on ibrutinib or acalabrutinib by 2018 IWCLL criteria * ECOG performance status \< 2 * Patients must meet the following hematologic criteria at screening, unless they have significant bone marrow involvement of CLL confirmed on biopsy: * Absolute neutrophil count ≥500 cells/mm3 (0.5 x 109/L). Growth factor is allowed in order to achieve this * Platelet count ≥50,000 cells/mm3 independent of transfusion within 7 days of screening * Adequate hepatic function defined as: Serum aspartate transaminase (AST) and alanine transaminase (ALT) ≤ 3.0 x upper limit of normal (ULN), bilirubin ≤2.0 x ULN (unless bilirubin rise is due to Gilbert's syndrome or of non-hepatic origin including hemolysis) * Adequate renal function defined by serum creatinine ≤1.5 x ULN or creatinine clearance (by Cockroft-Gauldt ≥ 50 ml/min * Women of child-bearing potential and men must agree to use adequate contraception (hormonal or barrier method of birth control; abstinence) prior to study entry and for the duration of study participation * Ability to understand and the willingness to sign a written informed consent document Exclusion Criteria: * Patients receiving cancer therapy (i.e., chemotherapy, radiation therapy, immunotherapy, biologic therapy, hormonal therapy, surgery and/or tumor embolization) other than ibrutinib or acalabrutinib within 2 weeks of Cycle 1/Day 1 with the following exceptions: * Limited palliative radiation is allowed if completed \> 1 weeks of C1D1 * Hormonal therapy given in the adjuvant setting * Corticosteroid therapy (prednisone or equivalent \<15 mg daily) is allowed as clinically warranted as long as the dose is stabilized at least for 7 days prior to initial dosing.Topical or inhaled corticosteroids are permitted * Within six months of allogeneic hematologic stem cell transplant at the time of starting study treatment or active graft vs. host disease requiring systemic treatment or prophylaxis within 6 weeks of starting study treatment * Prior treatment with copanlisib * Patients in CR on ibrutinib or acalabrutinib * History of other malignancies, except: * Malignancy treated with curative intent and with no known active disease present for ≥2 years before the first dose of study drug and felt to be at low risk for recurrence by treating physician * Adequately treated non-melanoma skin cancer or lentigo maligna without evidence of disease * Adequately treated carcinoma in situ without evidence of disease. * Low-risk prostate cancer on active surveillance * Vaccinated with live, attenuated vaccines \<4 weeks before first dose of study drug * Active autoimmune disease requiring systemic treatment * Recent infection requiring intravenous antibiotics that was completed ≤7 days before the first dose of study drug, or any uncontrolled active systemic infection * Known bleeding disorders (eg, von Willebrand's disease) or hemophilia * History of stroke or intracranial hemorrhage within 6 months prior to enrollment * Human immunodeficiency virus (HIV) or active hepatitis C virus (HCV) or hepatitis B virus (HBV) infection * CMV PCR positive at baseline * Major surgery within 4 weeks of first dose of study drug * History of or concurrent condition of interstitial lung disease of any severity and/or severely impaired lung function (as judged by the investigator) * Concurrent diagnosis of pheochromocytoma * Uncontrolled arterial hypertension despite optimal medical management * Type 1 or type 2 diabetes mellitus with a HgbA1c \> 8.5% * Any life-threatening illness, medical condition, or organ system dysfunction that, in the investigator's opinion, could compromise the subject's safety * Currently active, clinically significant cardiovascular disease, such as uncontrolled arrhythmia or Class 3 or 4 congestive heart failure as defined by the New York Heart Association Functional Classification; or a history of myocardial infarction, unstable angina, or acute coronary syndrome within 6 months prior to randomization * Unable to swallow capsules or malabsorption syndrome, disease significantly affecting gastrointestinal function, or resection of the stomach or small bowel, symptomatic inflammatory bowel disease or ulcerative colitis, or partial or complete bowel obstruction * Lactating or pregnant * Patients with known CNS involvement * Concurrent administration of medications or foods that are strong inhibitors or inducers of CYP3A * Known hypersensitivity to copanlisib, ibrutinib, or acalabrutinib