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OnMark Capital is a leading acquisition advisory firm providing dedicated outsourced corporate development and deal origination services to a select group of family offices, independent sponsors, private equity firms, and corporations across North America and Europe. Our services are designed for acquirers who are seeking new platforms, add-ons, or strategic acquisitions of middle market companies. Our specialization is helping clients build and execute a sustainable, long-term inorganic growth strategy rather than an individual, opportunistic approach.

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As a trusted advisor, our clients depend on OnMark Capital to help execute one of their most important strategic growth initiatives – M&A. We can deliver on this unwavering commitment to obtaining superior outcomes because we are 100% focused on acquisitions. We are experts in developing consistent and ongoing data-driven marketing campaigns; and we manage the process of discreet and professional outreach to middle market privately held companies, family and founder-owned businesses. Our targeted approach is strategic, tailored, flexible, and results-driven. 

OnMark Capital was founded on the principles of integrity, honesty, tenacity, and transparency. We believe that building trust and cultivating long-term relationships are essential to delivering impactful results to both buyers and sellers throughout an M&A process.


Eric B. Nelson, CFP®, CM&AA®


Eric B. Nelson, CFP®, CM&AA® – Founder and President

Eric is the President and Founder of OnMark Capital and leads the acquisition advisory practice for the firm. He is a buy-side M&A expert and provides outsourced corporate development support to institutional investors and corporations seeking to grow through strategic M&A. 

Prior to launching OnMark Capital, Eric was a Director in the buy-side practice at Citizens M&A Advisory, a top ten U.S. middle market advisory firm. Eric led the practice’s marketing and business development efforts, with a focus on generating proprietary, off-market deal flow for his clients. The aggregate valuation of the buy-side transactions initiated, both domestically and for multinational clients, was over $600 million. He was recruited by Citizens Financial Group in 2013 to launch a national business development channel focused on the middle market and large corporate segments.


Prior to joining Citizens, Eric was a Private Wealth Advisor for Morgan Stanley, advising private, high-net worth individuals, entrepreneurs and affluent families on how to invest their portfolios and develop plans to meet their financial goals.

Eric was recruited by Morgan Stanley after the successful sale of United Funding Corp, a company he founded in 2002 and served as its CEO for close to a decade. Leading all aspects of this financial services firm, he drove its growth from an unknown entity to an area-leading service provider with an exceptional reputation.

Early in his career, Eric served in a variety of sales and leadership roles at several Fortune 100 companies.

Eric graduated from the University of Massachusetts-Dartmouth with a bachelor’s degree in Accounting. He also holds an MBA from Boston College’s Carroll Graduate School of Management. Eric is a Certified Mergers & Acquisition Advisor (CM&AA®) and a Certified Financial Planner (CFP®). Eric holds the FINRA Series 7 (General Securities Registered Representative), 79 (Investment Banking), and 63 (Uniform Securities Agent State Law) securities registrations.  

Eric resides in the Boston area with his wife, Evelyn, and spends his free time with his family and friends, golfing, traveling, and skiing. He is involved in several civic and social service organizations as well. 

Eric was instrumental in helping us to build a pipeline of future acquisition targets. He developed a strong understand of our business and applied his superior relationship skills to build a network of high quality opportunities that aligned with our strategic priorities. Eric was a key partner in helping us to successfully close a proprietary strategic acquisition.

– Thomas Dewey, Executive Vice President, People & Strategy, Medical Mutual


to learn how our expertise and approach can help your company’s acquisition strategy.