KeyBanc analyst Edward Yruma told investors in a research note that Blue Apron's (APRN) expansion of its on-demand meal kits at Costco (COST) continues to progress well, spreading to the Midwest and Southern areas of the U.S., and that this reinforces his increasingly constructive stance. While still small compared to direct-to-consumer, Yruma says the kits provide an opportunity for Blue Apron to conveniently reach new customers with a best-in-class national partner and that its upside prospects are becoming more favorable. Yruma maintains a Sector Weight rating, says valuation looks reasonable, and adds that operational issues at the Linden fulfillment centers are "largely in the past."