Digital pen maker Wacom, long a flagship of Clark County's technology sector, said Thursday that it will move its headquarters for the Americas from Vancouver to Portland's Pearl District next spring. The Japan-based company, which makes digital pens and pads used by illustrators, animators and industrial designers, said it will relocate nearly all of its 160 employees to Portland. There, the company will occupy the top three floors of a nine-story building now under construction at Northwest 14th Avenue and Irving Street in the Pearl District. The company also will operate a ground-level retail store at the new location, said Doug Little, Wacom's senior public relations manager. The new office will provide 55,000 square feet, an increase from the company's present headquarters at 1311 S.E. Cardinal Court in Vancouver, Little said. About five employees will remain in Vancouver, providing return and repair services to the company's customers, Little said.