Portland, Ore. – Perkins & Co, the largest locally owned accounting firm in Portland, will merge with Thompson Kessler Wiest & Borquist PC (TKWB), an esteemed local boutique firm with more than 30 years of experience working in high-demand industries such as construction, real estate, manufacturing and international tax. The merger is scheduled to take effect on July 1, 2016. The firms will consolidate under the name and office of Perkins & Co.