I was looking into my fleet commonality today and noticed that the D-436 type engine is produced by Motor Sich, which the AI-30 type engine is produced by Motor-Sich and are calculated as two different engine manufacturing companies. As far as I know, these two should be the same company.
Also, when comparing the Antonov An-148/An-158 jetliners with the Tupolev Tu-334 jetliner, you can notice that the one is using the Motor Sich D-436-148 engine and the other is using the ZMKB Progress D436T1 engine. As of Soviet tradition, the designer of the aircraft/engine is seperated from the manufacturer of the aircraft/engine. This is also the case with Ivchenko-Progress ZMKB (designer) and Motor Sich (producer).