(Reuters) – Unilever’s shares rose 5% on Monday following reports activist investor Nelson Peltz has built a stake in the consumer goods maker, as its strategy comes under scrutiny after effectively abandoning the pursuit of GlaxoSmithKline’s consumer healthcare business. Peltz’s activist hedge fund, Trian Partners, has built an unspecified stake in Unilever, a person familiar with the matter told Reuters on Sunday. New York-based Trian is known for proposing operational fixes at its portfolio companies. (Reporting by Pushkala Aripaka in Bengaluru and Svea Herbst-Bayliss in Boston; Editing by …