The current institutional shareholding score of Ribbon Communications Inc is 7.00, ranking 18 out of 54 in the Communications & Networking industry. The latest institutional shareholding proportion is 79.51%, representing a quarter-over-quarter increase of 5.94%. The largest institutional shareholder is Chuck Royce, holding a total of 3.33M shares, representing 2.78% of shares outstanding, with 0.35% increase in holdings.