LONDON, July 31, 2019 /PRNewswire/ -- On 30 July 2019, the Board of Directors of Tetragon declared a dividend of U.S.$ 0.1850 (18.50 cents) per share in respect of the second quarter of 2019. The ex-dividend date is 1 August 2019. The record date is 2 August 2019. Payment of the dividend...