Private Equity Firms in Maryland

Ecosystem Investment Partners (EIP) is a private equity firm dedicated to environmental impact through market-based conservation solutions. Founded with the mission of aligning ecological preservation with financial returns, EIP develops and manages large-scale ecological restoration projects across the United States. The firm partners with public and private stakeholders to implement nature-based solutions that address water quality, biodiversity, and habitat restoration. EIP specializes in mitigation banking, habitat restoration, and conservation finance, offering investors access to a unique asset class rooted in sustainability and long-term value creation. The firm’s approach combines ecological science with financial expertise to structure projects that generate measurable environmental benefits alongside competitive returns. By leveraging regulatory-driven demand for ecosystem services, EIP provides scalable solutions that benefit both nature and investors. With a seasoned team of scientists, engineers, and investment professionals, Ecosystem Investment Partners continues to expand its portfolio of projects that restore and preserve thousands of acres of critical ecosystems. From wetlands and streams to endangered species habitats, EIP’s projects have restored over 45,000 acres of land to date, reinforcing its position as a leader in conservation-based investment strategies.

HA Sustainable Infrastructure Capital (HASI) is an investment firm dedicated to advancing the energy transition through sustainable infrastructure investments. The firm provides flexible capital solutions and leverages long-term partnerships to generate value for clients, investors, and the environment. HASI's investment strategy focuses on assets that deliver measurable environmental benefits and superior risk-adjusted returns, primarily within the United States.Founded in 1981, HASI has grown to manage over $16 billion in assets as of December 31, 2025. The firm has been publicly listed on the New York Stock Exchange (Ticker: HASI) since 2013, underscoring its commitment to transparency and long-term value creation. HASI's approach is characterized by permanent capital, structuring flexibility, transaction efficiencies, broad expertise in energy markets and financial structuring, and execution certainty.HASI's investment portfolio is diversified across three primary climate solutions markets: Behind-the-Meter, Grid-Connected, and Fuels, Transport & Nature. Behind-the-Meter investments include distributed energy solutions such as on-site and near-site solar and storage systems, as well as energy-efficiency projects. Grid-Connected projects encompass utility-scale clean energy assets like solar farms, onshore wind parks, and grid-scale battery energy storage systems. The Fuels, Transport & Nature segment extends beyond electricity and the built environment, focusing on renewable natural gas projects, clean transportation fleets, and ecological restoration initiatives.The firm is led by an experienced executive team, including Jeffrey A. Lipson as President and CEO, Nitya Gopalakrishnan as Senior Managing Director and Chief Operating Officer, and Charles W. Melko as Senior Managing Director, Chief Financial Officer and Treasurer. The leadership team brings deep expertise in finance, energy markets, and client relations, enabling HASI to deliver tailored financing solutions and maintain strong client partnerships throughout the investment lifecycle.

JMI Equity is a growth equity firm that partners with leading software companies. Founded in 1992, JMI has invested in over 190 businesses, including more than 100 cloud investments, and has completed over 120 exits. The firm's portfolio companies collectively generate $10 billion in revenue and represent $80 billion in enterprise value, employing over 36,000 people. With offices in Baltimore, San Diego, and Washington, D.C., JMI Equity provides flexible capital, strategic guidance, and operational support to help companies scale and build lasting value. The firm typically invests between $25 million and $250 million in companies with proven business models, high recurring revenue, and long-term growth potential. JMI Equity focuses on sectors such as cloud computing, energy, utilities, real estate, education, finance, insurance, legal, government, digital health, and information technology, primarily targeting companies in North America and Europe.

Marlinspike Partners is a U.S.-based venture capital firm established in 2020, focusing on investments in "dual-use" technologies. The firm targets innovative startups whose products serve both national security needs and possess significant commercial market potential. Their investment strategy is centered on bridging the gap between cutting-edge commercial innovation and the requirements of the defense sector.The firm was founded in 2020 by Neil Keegan and Mislav Tolusic, who serve as Co-Managing Partner & CEO and Co-Managing Partner & CIO, respectively. Marlinspike emerged from a conviction that the next generation of national security advantage will be driven by commercial innovation. The team comprises individuals with deep roots in national security, defense technology, and venture capital, including former senior intelligence officials and military officers.Marlinspike invests across key sectors such as aerospace, artificial intelligence, autonomy, robotics, and cybersecurity. Notable investments include companies like JetZero, Layup Parts, Chariot Defense, Observable Space, Hypori, Armada, and Heliux. The firm emphasizes providing not only capital but also deep operational and strategic support to help founders navigate the complex landscape of defense procurement, government partnerships, and scaling in high-stakes environments.The team's expertise is a cornerstone of Marlinspike's approach. Key members include Neil Keegan, Mislav Tolusic, Chip Walter (Partner, Managing Director), and Grace McGill (Partner, CFO). Additionally, Ellen M. Lord, former Under Secretary of Defense for Acquisition and Sustainment, serves as a Strategic Advisor, bringing unparalleled experience in defense acquisition and industrial challenges to the firm.

Northlane Capital Partners is a private equity firm headquartered in Bethesda, Maryland, focusing on investments in lower middle-market companies. Established in 2015 as a spin-out from American Capital, the firm targets healthcare and business services sectors with enterprise values between $50 and $200 million.With more than $1 billion in assets under management, Northlane partners with entrepreneurs and management teams to accelerate growth, optimize operations, and build long-term value. The firm typically makes control equity investments and supports both organic and acquisitive expansion strategies.Northlane Capital has a seasoned team with deep sector knowledge and strong transaction execution capabilities. The firm invests across the U.S., maintaining a network of advisors and operating partners to support portfolio performance.