It's been a busy time for the lean legal team at reverse-logistics firm Optoro. The startup, which designs software to help retailers manage and sell returned merchandise and excess inventory, recently raised $46.5 million in Series D funding, the company's fifth round of investments since it was founded in 2010.

Optoro's client list includes many of the country's top retailers, including Groupon and BJ's Wholesale.

In December, the company announced a strategic partnership with delivery service UPS to further expand its reach.