Is AIX open source?

I'm curious to know, is the AIX platform open source? With the ever-growing importance of transparency and collaboration in the blockchain and cryptocurrency world, it's becoming increasingly common for projects to make their code publicly available. Does AIX adhere to this trend, or is their code kept proprietary? Understanding the openness of their platform could potentially impact the trust and adoption of AIX by the broader community. So, is AIX open source or not?