WASHINGTON — APCO Worldwide and Erie Street have launched a partnership to support continued expansion of APCO’s strategic advisory offering and geographical footprint. In addition to the strategic partnership, Terry Graunke, chairman and CEO of Erie Street, was appointed as lead director of APCO’s board of directors. Erie Street is a Chicago-based, independent advisory firm that offers a range of corporate advisory and go-to-market strategy services to mitigate risk, realize potential and deliver exceptional value for clients in highly disruptive and constantly changing business environments.

ARDMORE, PA —Gregory FCA has acquired KM Digital Relations, a digital and social marketing agency based in Ft. Washington, Pa. Headed by former Gregory FCA employee Kwan Morrow, KM Digital Relations provides social media, digital marketing, and lead generation services to a portfolio of national B2B clients. The move will bring new digital and social offerings to Gregory FCA as well as amplify the firm’s current services, including advanced social media capabilities, digital advertising, employee and executive social programs.

NEW YORK — London research and insights firm Opinium has launched a New York office. Opinium has expertise in financial services, tech, healthcare, retail and CPG sectors, providing insights for a diverse range of brands including Vanguard, Fidelity, Worldpay, Samsung, SnapChat, LinkedIn, Nike, Adidas, Estee Lauder, Sanofi and BAE Systems. It also works with a number of leading communications consultancies, including Burson Cohn & Wolfe, Edelman, FleishmanHillard Fishburn, Hill+Knowlton Strategies, Lansons Intermarket, Porter Novelli and WE Communications, conducting research in multiple geographies.