Top Private Equity Firms in Massachusetts — 48

Boston, MA, US

Deal sizes: $2M – $900M

JW Equity Ventures LLC is a private investment firm focused on acquiring small to mid-sized businesses. The team combines operating and investing experience with an entrepreneurial approach to build long-term value. The firm employs permanent capital and targets consolidation opportunities, capital markets execution, digital transformation, and operational improvement, maintaining an ownership horizon of 10 years or longer.

Boston, MA, US

Deal sizes: $10M – $50M

Candescent Partners is a Boston-based private equity firm investing in founder-led, lower middle market companies operating in fragmented sectors. The firm primarily targets healthcare services, business services, software, and consumer products and services, partnering with management to build professionally managed platform companies and accelerate growth through organic initiatives and complementary acquisitions. Founded in 2008 by Steve Jenks and Sandy McGrath, with Steve Sahlman joining in ...

Wellesley, MA, US

Deal sizes: $5M – $50M

Gemini Investors is a Massachusetts-based private equity firm focused on the smaller end of the middle market, partnering with established companies and experienced management teams. The firm provides flexible growth capital across control and minority transactions, typically investing $3-$8 million per deal through structures that include subordinated debt with warrants, preferred stock, and common equity. Gemini brings extensive experience leading transactions and co-investing alongside other ...

Boston, MA, US

Deal sizes: $10M – $100M

Riverside Partners is a Boston-based private investment firm focused on middle-market healthcare and technology companies. The firm is currently investing Riverside Fund V, a $561 million equity fund. Since 1988, Riverside Partners has partnered with owners and management teams of profitable businesses to accelerate growth and enhance long-term value. Riverside typically targets companies with revenues between $10 million and $100 million across a broad spectrum of healthcare and technology sub...

Marblehead, MA, US

Deal sizes: $5M – $40M

Sagepeak Capital is a private equity firm that partners with small to mid-sized companies to drive long-term, operationally led growth. Backed by patient, committed capital, the firm provides flexible capital solutions and transaction structures to support organic expansion and add-on acquisitions, and can execute decisively given its private capital base. Typical investments include leveraged buyouts, recapitalizations, and corporate divestitures. The firm targets businesses generating $5 mill...

Boston, MA, US

Deal sizes: $10M – $300M

Sandkey Capital is an investment firm that manages committed capital through affiliated vehicles, leveraging a long-standing track record and deep operational, strategic, and financial expertise across multiple sectors. The firm’s investment approach, target industries, and check sizes vary by fund. In the lower middle market, Sandkey focuses on consumer products, retail, manufacturing, and business services, targeting businesses in transition such as entrepreneur-led companies facing successio...

Northampton, MA, US

Deal sizes: $10M – $75M

Ventoux Holdings is a manufacturing and industrial investment firm that pursues a long-term, buy-and-hold strategy. As lead investors without external fundraising pressures or benchmark constraints, the Partners take a patient, team-oriented approach focused on steady organic growth and durable value creation for employees and stakeholders. The firm seeks control positions in U.S.-based manufacturers selling to commercial and industrial end users and distributors, with particular interest in co...

Gardner, MA, US

Deal sizes: $5M – $50M

Founded in 2004, Wheelock Partners is an operator-led private investment firm focused on acquiring, managing, and growing established manufacturing and service businesses across New England. The firm invests across a broad range of industries and typically assumes day-to-day operating roles post-acquisition to drive operational improvements and long-term value creation. Wheelock targets founder- and owner-led companies with revenues between $5 million and $50 million, with a particular emphasis...

Boston, MA, US

Exaltare Capital Partners is a Boston-based private equity firm that invests in owner-managed and family-controlled businesses, as well as corporate divestitures, often through management buyouts. The firm targets companies with EBITDA greater than $3 million that seek an active, growth-oriented partner. Guided by its name’s Latin meaning, “to elevate,” Exaltare focuses on niche-leading, superior operators and collaborates with strong management teams to preserve core strengths while accelerati...

Boston, Massachusetts, United States

Deal sizes: $3M+

Winding Lane is a long-term investment group with over $20 million in permanent committed capital. The firm partners with asset-light businesses operating in large, fragmented, and growing markets that generate recurring or reoccurring revenue. Its investor base consists of accomplished operators and private equity professionals rather than large institutions, enabling a patient, founder-friendly approach. As a long-term holding company, Winding Lane emphasizes small to medium-sized providers o...

Wakefield, Massachusetts, United States

Deal sizes: $3M – $50M

424 Capital is a private equity firm that invests in tech-enabled services companies across life sciences, healthcare, and critical infrastructure, including water, energy, and security. The firm targets lower middle market small to midsize enterprises and provides both growth capital and strategic resources to scale operations and accelerate growth. Working in close partnership with management teams, 424 Capital applies a collaborative, growth-oriented approach to build durable value and drive...

Newton, MA, US

Founded in 2006, Castle Island Partners is a long-term oriented investor focused on industrial manufacturing and distribution, as well as consumer and food businesses. The firm invests substantial personal capital alongside its partners and favors extended ownership horizons rather than the traditional 3–5 year private equity exit cycle. Castle Island Partners targets companies generating $1.5 million to $15 million of EBITDA and seeks significant control positions, acquiring 30% to 100% owners...

Ashland, Massachusetts, United States

Granite Street Partners is a private equity firm focused on lower middle market industrial and manufacturing companies. The firm targets businesses with EBITDA between $1 million and $5 million and applies a hands-on, operator-led approach to value creation. Working closely with owners and management teams, Granite Street Partners seeks to uncover operational and strategic opportunities, drive performance improvements, and build durable enterprise value and investor returns.

Boston, Massachusetts, United States

Heritage Holding is a Boston-based, lower middle market private equity firm with $220 million of committed institutional capital. Since 2016, the firm has completed more than 50 acquisitions, underscoring a disciplined buy-and-build approach. The firm focuses on essential B2B services businesses with stable operating histories, targeting companies that generate $1–10 million of EBITDA. Heritage Holding partners with management teams to drive long-term growth and value creation.

Boston, MA, US

Deal sizes: $5M – $150M

JMH Capital Partners is an operationally focused private equity firm based in Boston that invests in established, entrepreneur-led lower middle market companies generating $5 million to $150 million in revenue. The firm partners with management teams to provide strategic, financial, operational, and transactional resources to accelerate growth, with a goal of helping businesses double or triple in size. JMH Capital differentiates itself through deep senior-level operating experience across a ra...

Boston, Massachusetts, United States

Deal sizes: $5M – $25M

Wavecrest Growth Partners is a growth equity firm that invests in high-growth, capital-efficient B2B software and technology-enabled services businesses, including AI- and data-driven solutions. The firm targets companies generating $5–25 million in revenue and partners with management to scale these platforms to $50 million and beyond. Wavecrest provides growth capital alongside operating expertise and deep industry networks to accelerate go-to-market expansion, strengthen leadership through s...

Boston, MA, US

Battery Ventures is a global, technology-focused investment firm founded in 1983. The firm partners with exceptional entrepreneurs and management teams across venture capital and private equity, applying a rigorous, data-driven investment process and fostering a collaborative, humble culture. From offices including Boston, Silicon Valley, London and Israel, Battery backs high-potential companies and ideas worldwide. Battery invests across stages—from early startups to established market leaders...

Boston, MA, US

Kensington-SV Global (operating as KSV Global) is a Boston-based investment firm focused on growth equity opportunities across the United States, Europe, and Asia. The firm blends a family office environment with institutional investment discipline to build long-term, value-added partnerships with entrepreneurs and owners. KSV Global is sector-flexible with deep experience across consumer, healthcare, industrials, technology, and technology-enabled services. The firm targets strong business mod...

Wellesley Hills, MA, US

MedEquity Capital is a private equity firm focused exclusively on the healthcare sector, investing in small and lower middle market companies with resilient cash flow profiles. The firm partners closely with management teams to pursue both organic initiatives and strategic add-on acquisitions. Through an operationally oriented approach and disciplined capital deployment, MedEquity Capital aims to accelerate growth and enhance long-term value creation across its portfolio.

Boston, MA, US

Pleasant Bay Capital Partners is a merchant banking and private equity firm focused on the lower middle market, investing through control acquisitions, recapitalizations, and structured minority stakes. The firm partners with management teams and co-investors to provide flexible equity and debt solutions tailored to the needs of company owners and operators, with sector experience spanning Healthcare, Technology, Business Services, Industrial Products & Services, and Consumer Products & Services...