Barclays PLC has increased its stake in Infinera Corp by acquiring 14,190,950 shares at $6.75 each, bringing its total holdings to 14,261,876 shares, reflecting confidence in the company's growth potential despite recent revenue challenges. Infinera, a key player in networking solutions, has shown strong earnings growth of 37.30% over the past three years, although it faces financial health concerns with low profitability and growth ranks. Other notable investors include GAMCO Investors and Joel Greenblatt.