The Russian Air Force has just received the fourth batch of Su-35S fighters this year. PJSC United Aircraft Corporation (UAC, part of Rostec State Corporation) announced on August 21, 2025 that it has handed over the next batch of new Su-35S multi-role fighters to the Russian Air Force. The 4++ generation aircraft passed a full cycle of factory tests, were accepted by the technical staff and tested in various operating modes by pilots of the Russian Ministry of Defense.
UAC announced the transfer of the first batch of Su-35S fighters to the Russian Air Force in 2025 on March 29, 2025, the second batch on May 12, and the third batch on June 25. As usual, UAC reports from 2022 onward do not disclose the number of aircraft delivered, and the fighter aircraft's flight numbers are retouched on the official photos and videos distributed.The third batch handed over on June 25 reportedly consisted of three aircraft. According to "bmpd" on LiveJournal, during 2024, KnAAZ transferred four batches of Su-35S fighters to the Russian Ministry of Defense with a total estimated number of 15 aircraft. Presumably, the now transferred Su-35S fighters are manufactured under the additional (fifth) contract signed by UAC for the supply of Su-35S aircraft to the Russian Ministry of Defense. In total, taking into account previous contracts, the Russian Air Force has received an estimated 135 serial Su-35S fighters between 2012 and the end of 2024.
