Stable, aqueous formulations of antibodies that bind IL5 receptor

An aqueous antibody formulation that has not been subjected to lyophilization comprising:

• a. about 30 mg/ml of an antibody, wherein the antibody comprises a heavy chain variable region and a light chain variable region, wherein the heavy chain variable region comprises the Kabat-defined CDR1, CDR2, and CDR3 sequences of SEQ ID NOs:
• 5-7, and wherein the light chain variable region comprises the Kabat-defined CDR1, CDR2, and CDR3 sequences of SEQ ID NOs:
• 8-10,
• b. about 0.002% to about 0.006% w/v polysorbate-20,
• c. a buffer, wherein the buffer concentration is about 10 mM to about 30 mM, and
• d. an excipient, wherein the excipient concentration is about 200 mM to about 400 mM,
• wherein the antibody formulation has a pH of about 5.5 to about 6.5, and wherein storage of the antibody formulation at 23° C. to 27° C. for 3 months results in degradation of less than 5% of the antibody as determined by high performance size exclusion chromatography (HPSEC).