Financial details of the acquisition were not disclosed.
The move is part of the global investment management firm's plan to meet market regulator Sebi's new minimum net worth norms.
"The investment is an important step prior to execution of our recapitalisation plans to meet Sebi's new minimum net worth norms. We are now ready to step up our expansion efforts and the move validates Principal's belief in the long-term growth potential of the mutual fund industry," Principal International (India) Country Head Rajan Ghotgalkar said.
With the completion of acquisition of Vijaya Bank's stake, Principal and Punjab National Bank have 70 per cent and 30 per cent shareholding respectively in the reconstituted mutual fund joint venture.