QUILT-3.002: ALT-803 in Patients With Relapse/Refractory iNHL in Conjunction With Rituximab

The purpose of this study is to evaluate the safety and tolerability, identify the Maximum
Tolerated Dose (MTD) or the Minimum Efficacious Dose (MED) and designate a dose level for
Phase 2. Also characterize the immunogenicity, pharmacokinetic profile, and biomarker serum
levels of ALT-803 in treated patients.

The effect of ALT-803 on the peripheral absolute lymphocyte counts and white blood cell
counts, the number, phenotype and repertoire of peripheral blood T (total and subsets) and NK
cells will be evaluated. In addition, a subset of patients will be evaluated for changes in
lymph node immune composition. Anti-tumor responses and survival data will also be collected
in this trial.

DISEASE CHARACTERISTICS:

- Histologically confirmed diagnosis of iNHL (Follicular lymphoma grade 1, 2, 3a;
marginal zone lymphoma; small lymphocytic lymphoma or lymphoplasmacytic lymphoma)
after treatment with at least 1 or more prior rituximab-containing regimens.

- Anti-CD20 mAb-refractory disease is defined as progressive disease while on
rituximab (or another treatment of an anti-CD20 monoclonal antibody) or
progression within 6 months of rituximab-containing (or another treatment of an
anti-CD20 antibody-containing) therapy.

- Anti-CD20 mAb-sensitive disease is defined by a response to a prior
rituximab-containing (or another treatment of an anti-CD20 monoclonal antibody)
regimen, and relapse more than 6 months from the last administration of
rituximab-containing (or another treatment of an anti-CD20 antibody-containing)
therapy.

- Measurable disease:

- At least one lymph node group ≥ 1.5 cm in longest transverse dimension. Patients
with cutaneous only disease may be enrolled if they have a clearly measurable
skin lesion.

- Relapsed or Refractory iNHL that has progressed during or following 1 or more
prior systemic rituximab-containing (or another treatment of an anti-CD20
antibody-containing) regimens for lymphoma

PRIOR/CONCURRENT THERAPY:

- No anti-lymphoma treatments within 28 days before the start of study treatment.

- Must have recovered from side effects of prior treatments.

PATIENT CHARACTERISTICS:

Performance Status

• ECOG 0, 1, or 2

Renal Function • Glomerular Filtration Rate (GFR) > 40mL/min or Serum creatinine ≤ 1.5 X
ULN

Bone Marrow Reserve

- Platelets ≥30,000/uL

- Hemoglobin ≥ 8g/dL

- Absolute Lymphocytes ≥800/uL

- ANC/AGC ≥750/uL

Hepatic Function

- Total bilirubin ≤ 2.0 X ULN (unless Gilbert's Syndrome or disease infiltration of
liver is present)

- AST, ALT ≤ 3.0 X ULN, or ≤ 5.0 X ULN (if liver lymphoma is present)

- No positive Hep C serology or active Hep B infection

Cardiovascular

- No congestive heart failure < 6 months

- No unstable angina pectoris < 6 months

- No myocardial infarction < 6 months

- No history of ventricular arrhythmias or severe cardiac dysfunction

- No history of uncontrollable supraventricular arrhythmias

- No NYHA Class > II CHF

- No marked baseline prolongation of QT/QTc interval

Pulmonary

• Normal clinical assessment of pulmonary function

Other

- Negative serum pregnancy test if female and of childbearing potential

- Women who are not pregnant or nursing

- Subjects, both females and males, with reproductive potential must agree to use
effective contraceptive measures for the duration of the study

- No known autoimmune disease other than corrected hypothyroidism

- No known prior organ allograft or allogeneic transplantation

- Not HIV positive

- No active CNS involvement with lymphoma

- No psychiatric illness/social situation that would limit compliance

- No other illness that in the opinion of the investigator would exclude the subject
from participating in the study

- Must provide informed consent and HIPPA authorization and agree to comply with all
protocol-specified procedures and follow-up evaluations

- No active systemic infection requiring parenteral antibiotic therapy

- No disease requiring systemic immunosuppressive therapy (inhaled or topical steroids
are allowed). Adrenal replacement steroid doses ≤ 10 mg daily prednisone equivalent
are permitted in the absence of active autoimmune disease.

- No known histologic transformation from iNHL to DLBCL