Campbell Conroy & O'Neill, P.C.

Campbell Conroy & O'Neill, P.C., also known as CC&O, P.C., is a law firm headquartered in the United States of America. The firm provides legal counsel and advisory services to a range of corporate clients. Its practice includes representing numerous Fortune 500 and Global 500 companies operating in sectors such as automotive, aviation, and healthcare. The firm’s attorneys handle matters that span regulatory compliance, transactional work, and litigation support for these large enterprises. By focusing on high‑profile multinational corporations, the firm positions itself within the corporate law market serving complex, cross‑industry clients.

Campbell Conroy & O'Neill’s distinguishing attribute is its concentration on advising major industrial and technology‑driven enterprises, which requires deep familiarity with industry‑specific regulations and business practices. The firm’s involvement with Fortune 500 and Global 500 clients indicates a capacity to manage high‑stakes, multifaceted legal matters that often involve significant financial and operational implications. In February 2021 the firm experienced a ransomware attack that disrupted network access and exposed sensitive personal information, including names, Social Security numbers, financial data, medical records and credentials. The incident prompted the engagement of forensic experts and law enforcement, and the firm offered affected individuals credit monitoring and identity theft services. While the firm’s ownership structure or parent‑subsidiary relationships are not disclosed in the available sources, its status as a professional corporation (P.C.) reflects a common legal entity format for law firms in the United States.