Slow enrollment

Determine the safety, tolerability, pharmacokinetics, maximum tolerated dose (MTD) and recommended phase 2 dose (RP2D) of VIP152 as monotherapy or in combination with a BTKi in patients with Chronic Lymphocytic Leukemia (CLL) or Richter Syndrome

Inclusion Criteria:

• Male or female patients aged >/=18 years
• Adequate bone marrow, liver, and renal functions
• Eastern Cooperative Oncology Group (ECOG) performance status of 0 to 2
• Diseases as defined below:

PART1

• Subjects with CLL with either del(17p) by FISH or TP53 mutation who have received ≥1 prior therap(ies) and the last prior regimen must have included venetoclax plus an anti-CD20 antibody and/or a BTKi and did not produce complete remission. Subjects with CLL with either del(17p) by FISH or TP53 mutation who have received ≥2 prior regimens and are intolerant to BTKi and/or venetoclax are also eligible.

or

• Subjects with CLL transformed to DLBCL who have relapsed after, or been refractory, to at least 1 prior line of therapy for DLBCL

PART2

• Subjects with CLL who are currently on an approved BTKi (monotherapy only) at the dose and schedule per the local label for ≥ 12 months who have only achieved SD, PR or PRL

Exclusion Criteria:

• Active clinically serious infections of Grade > 2; requiring parenteral therapy
• Subjects who have new or progressive brain or meningeal or spinal metastases.
• Anticancer chemotherapy or immunotherapy during the study or within one week prior to the first dose of study drug
• Major surgery or significant trauma within 4 weeks before the first dose of study drug
• Allogeneic bone marrow transplant or stem cell rescue within 4 months before first dose of study drug; patients must have completed immunosuppressive therapy before enrollment