April 28 : Activist investor Starboard Value on Tuesday disclosed it has made a "substantial investment" in Dynatrace, as it sees the software monitoring firm as undervalued despite its strong competitive positioning and long-term growth prospects. Dynatrace shares rose more than 5 per cent in premarket trading. Starboard, in a letter to the company's top management and board, said Dynatrace had significant strategic value. It urged the company to accelerate margin expansion and return more