EXCLUSIVE: Activist Jana pushes Fiserv to accelerate cost cuts and tap Palantir ↧ ↧ EXCLUSIVE: Activist Jana pushes Fiserv to accelerate cost cuts and ... Activist investor Jana Partners is urging Fiserv to more than double its planned cost ‌cuts and use software firm Palantir's products to speed up its own technology transformation program, according to a letter sent to the payments company that was viewed by Reuters.