Premera Blue Cross and its subsidiary LifeWise are capturing the majority of folks enrolling in Washington’s new health insurance marketplace, according to data released Thursday by state officials. Nearly 43,000 people — almost two-thirds of the total enrollees — signed up for coverage from the two insurance companies through the end of December. Group Health Cooperative was the next most popular company, selling plans to more than 18 percent of enrollees. The insurance marketplace — called Washington Healthplanfinder — launched in October as part of the Affordable Care Act and sells individual and family health insurance plans. Plans are also...