Provided herein are compositions comprising coformulation of anti-PD-L1 and anti-CTLA-4 antibodies, or antigen-binding fragments thereof, and methods of making and using such compositions.In various aspects, stable coformulations of the anti-PD-L1 antibody durvalumab (MEDI4736) and the anti-CTLA-4 antibody tremelimumab are provided.本文提供包含抗PD-L1及抗CTLA-4抗體或其抗原結合片段之共調配物之組合物,及製備及使用該等組合物之方法。在各個態樣中,提供抗PD-L1抗體德瓦魯單抗(durvalumab)(MEDI4736)及抗CTLA-4抗體曲美目單抗(tremelimumab)之穩定共調配物。