Biologics have great potential for the treatment of many diseases, especially regarding unmet medical needs, due to their target specificity. Moreover, even for diseases where small molecule therapies already exist, there is potential for biologics to provide a more effective solution. However, developing a biologic can often be more challenging compared to their small molecule counterparts. They are more likely to become unstable, have more complex structures, and therefore require more specialized development and manufacturing processes, next to the fact that living organisms are involved in the process which leads to further volatility. It is important to work with a contract development and manufacturing organization (CDMO) that can match these requirements, accommodate challenges in a flexible way and keep the development process moving towards commercialization.