Fisher spent six seasons with the Nittany Lions.
Peoples has two years of eligibility remaining.
Sanders has been with the program since 2021.
Ikakoula adds to a growing list of Iowa State transfers following Matt Campbell's hiring.
Nnodim has three years of eligibility remaining.
After rising to No. 8 during holiday break, a split with RIT drops the Nittany Lions back to No. 9.