Forsyth Capital Investors, an investment firm associated with Clayton-based Barry-Wehmiller, has closed on a deal to acquire Iowa-based HawkeyePedershaab, a maker of capital equipment for the production of concrete pipe and manholes. Terms of the purchase, which was completed in September, were not disclosed, though Ryan Gable, managing director of Forsyth, said the firm invested $20 million into the deal and now owns 90 percent of the company. Hawkeye, with $65 million in annual revenue, will...