Four players have been traded so far in the current window, which is open till December 12.
"The latest two trades both involve Royal Challengers Bangalore. They acquired Manvinder Bisla from Kolkata Knight Riders and have traded Parthiv Patel to Mumbai Indians," read a statement from the Board of Control for Cricket in India.
Earlier this week, Mumbai Indians acquired Unmukt Chand from Rajasthan Royals and R Vinay Kumar from Kolkata Knight Riders.
The IPL will be played from April 8 to May 24, 2015.
Image: Manvinder Singh Bisla
Photograph: BCCI Images