 PLEASANTON, Calif., April 26, 2021 PRNewswire -- Net sales of 347.6 million increased 22.6 year-over-year Gross margin of 46.7 increased from 45.7 in the prior year period Income from operations of 68.4 million increased 38.6 year-over-year, operating margin of 19.7 increased from 17.4 in the prior year period Diluted earnings per share of 1.16 increased 39.8 year-over-year Updating full year 2021 financial guidance on improved revenue expectations Simpson Manufacturing Co., Inc. the Company NYSE: SSD, an industry leader in engineered structural connectors and building solutions, today announced its financial results for the first quarter of 2021. 