Inclusion Criteria:

        Inclusion Criteria For All Arms:

          1. Diagnosis of relapsed/refractory aggressive Non Hodgkin's Lymphoma (NHL) with
             histology based on established World Health Organization (WHO) criteria.

          2. Must have received ≥1 prior line of therapy for the treatment of current histology,
             there are no known curative treatment options available, or subject ineligible for
             potential curative options.

          3. Presence of radiographically measurable lymphadenopathy or extranodal lymphoid
             malignancy. Not applicable for cutaneous lesions.

          4. ECOG performance status of ≤2.

        Inclusion Criteria for Arm 1:

        1. Must have previously received rituximab, cyclophosphamide, doxorubicin hydrochloride
        (hydroxydaunorubicin), vincristine sulfate, and prednisone or equivalent regimen with
        stem-cell rescue. Or who are ineligible for highdose chemotherapy with stem-cell rescue
        and/or chimeric antigen receptor (CAR) T cell therapy.

        Ineligibility for high-dose therapy with stem cell rescue and/or CAR T-cell therapy will be
        determined by the investigator.

        Inclusion Criteria for Arm 2:

        1. Must have previously received rituximab, cyclophosphamide, doxorubicin hydrochloride
        (hydroxydaunorubicin), vincristine sulfate, and prednisone or equivalent regimen with
        stem-cell rescue. Or who are ineligible for highdose chemotherapy with stem-cell rescue
        and/or chimeric antigen receptor (CAR) T-cell therapy.

        Ineligibility for high-dose therapy with stem cell rescue and/or CAR T-cell therapy will be
        determined by the investigator.

        Inclusion Criteria for Arm 3:

        1. Must have previously received rituximab, cyclophosphamide, doxorubicin hydrochloride
        (hydroxydaunorubicin), vincristine sulfate, and prednisone or equivalent regimen with
        stem-cell rescue. Or who are ineligible for highdose chemotherapy with stem-cell rescue
        and/or chimeric antigen receptor (CAR) T cell therapy.

        Ineligibility for high-dose therapy with stem cell rescue and/or CAR T-cell therapy will be
        determined by the investigator.

        Inclusion Criteria for Arm 4:

        1. Must have previously received rituximab, cyclophosphamide, doxorubicin hydrochloride
        (hydroxydaunorubicin), vincristine sulfate, and prednisone or equivalent regimen with
        stem-cell rescue. Or who are ineligible for highdose chemotherapy with stem-cell rescue
        and/or chimeric antigen receptor (CAR) T cell therapy.

        Ineligibility for high-dose therapy with stem cell rescue and/or CAR T-cell therapy will be
        determined by the investigator.

        Exclusion Criteria:

        Exclusion Criteria For All Arms:

          1. History of prior malignancy except for the following: a) Malignancy treated with
             curative intent and with no evidence of active disease present for more than 2 years
             before screening and felt to be at low risk for recurrence by treating physician, b)
             Adequately treated lentigo maligna melanoma without current evidence of disease or
             adequately controlled nonmelanomatous skin cancer, c) Adequately treated carcinoma in
             situ without current evidence of disease, d) Evidence of severe or uncontrolled
             systemic disease, or current unstable or uncompensated respiratory or cardiac
             conditions, or uncontrolled hypertension, history of, or active, bleeding diatheses or
             uncontrolled active systemic fungal, bacterial, viral, or other infection, or
             intravenous anti-infective treatment within 2 weeks before first dose of study
             treatment.

          2. Serologic status reflecting active hepatitis B or C infection.

          3. Prior use of standard antilymphoma therapy or radiation therapy within 14 days of
             receiving the first dose of study treatment (not including palliative radiotherapy or
             palliative corticosteroid use).

          4. Requires ongoing immunosuppressive therapy, including systemic corticosteroids for
             treatment of lymphoid cancer or other conditions.

          5. For subjects under DLT review only: Any haematopoietic growth factors or darbepoetin
             within 14 days of the first dose of study treatment.

        Exclusion Criteria for Arm 1:

          1. Presence of central nervous system (CNS) lymphoma or leptomeningeal disease.

          2. Current refractory nausea and vomiting, malabsorption syndrome, disease significantly
             affecting gastrointestinal (GI) function, resection of the stomach, extensive small
             bowel resection that is likely to affect absorption, symptomatic inflammatory bowel
             disease, partial or complete bowel obstruction, or gastric restrictions and bariatric
             surgery, such as gastric bypass.

          3. Requires treatment with proton-pump inhibitors.

          4. Requires treatment with strong CYP3A inhibitors or inducers.

        Exclusion Criteria for Arm 2:

          1. Relative hypotension (< 90/60 mm Hg) or clinically relevant orthostatic hypotension,
             including a fall in blood pressure of >20 mm Hg.

          2. Uncontrolled hypertension requiring clinical intervention.

          3. At risk for brain perfusion problems based on medical history.

          4. Mean resting QT interval (QTc) calculated using Fridericia's formula (QTcF) >470 msec
             for female subjects and >450 msec for male subjects obtained from 3 electrocardiograms
             (ECGs), or congenital long QT syndrome.

          5. Presence of central nervous system (CNS) lymphoma or leptomeningeal disease.

          6. Known to have tested positive for human immunodeficiency virus (HIV) & requires
             treatment with restricted medications.

          7. Current refractory nausea and vomiting, malabsorption syndrome, disease significantly
             affecting gastrointestinal (GI) function, resection of the stomach, extensive small
             bowel resection that is likely to affect absorption, symptomatic inflammatory bowel
             disease, partial or complete bowel obstruction, or gastric restrictions and bariatric
             surgery, such as gastric bypass.

          8. Requires treatment with proton-pump inhibitors.

        Exclusion Criteria for Arm 3:

          1. Presence of central nervous system (CNS) lymphoma or leptomeningeal disease.

          2. Current refractory nausea and vomiting, malabsorption syndrome, disease significantly
             affecting gastrointestinal (GI) function, resection of the stomach, extensive small
             bowel resection that is likely to affect absorption, symptomatic inflammatory bowel
             disease, partial or complete bowel obstruction, or gastric restrictions and bariatric
             surgery, such as gastric bypass.

          3. Requires treatment with proton-pump inhibitors.

          4. Red blood cell (RBC) transfusion dependence, defined as requiring more than 2 units of
             RBC transfusions during the 4-week period prior to screening.

          5. History of haemolytic anaemia or Evans syndrome in the last 3 months before enrolment.

          6. Positive IgG component of the direct antiglobulin test (DAT).

          7. Prior treatment with CD47 or SIRPα-targeting agents.

          8. Hypersensitivity to the active substance or to murine proteins, or to any of the other
             excipients of rituximab

        Exclusion Criteria for Arm 4:

          1. Presence of central nervous system (CNS) lymphoma or leptomeningeal disease.

          2. Current refractory nausea and vomiting, malabsorption syndrome, disease significantly
             affecting gastrointestinal (GI) function, resection of the stomach, extensive small
             bowel resection that is likely to affect absorption, symptomatic inflammatory bowel
             disease, partial or complete bowel obstruction, or gastric restrictions and bariatric
             surgery, such as gastric bypass.

          3. Requires treatment with proton-pump inhibitors.

          4. Requires treatment with CYP3A inhibitors or inducers or substrates of drug
             transporters.

          5. History of tuberculosis.

          6. Mean resting corrected QT interval (QTcF) >450 msec obtained from 3 electrocardiograms
             (ECGs); clinically important ECG findings, or risk factors for QTc prolongation.

          7. Subjects receiving antiplatelet or anticoagulant therapies within 28 days of first
             dose of study drug.