Opal is raising more cash. A new SEC filing reveals that the Portland startup, previously known as Opal Labs, has raised $12 million of a larger investment round. Opal CEO Steve Giannini confirmed that the company is raising more money, but did not reveal more details about investors or how Opal will use the fresh funding. Founded in 2011, Opal helps businesses streamline the production of marketing and social media campaigns with one central platform and framework. Clients include NASA, Nike, Starbucks, Target, Airbnb, and others. In 2014, Opal raised an $8 million Series A round led by Seattle-based Madrona Ventures. Len Jordan, managing director at…...