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M33 Growth
M33 seeks to partner with ambitious bootstrapped entrepreneurs by providing both capital and resources to accelerate growth and develop their already-great...
M33 Growth
M33 seeks to partner with ambitious bootstrapped entrepreneurs by providing both capital and resources to accelerate growth and develop their already-great businesses into market leaders. The firm intentionally builds a concentrated portfolio so that each company is not a small fish in a big pond, with its next investment #19 as the active lead. Its world revolves around its portfolio companies.
General information
Firm type
Private Equity
Year founded
2017
Location
Region
North America
Country
United States
City
Boston
Corporate office
Boston, MA, United States
Principals
Michael Anello
Co-Founder & Managing Director
Brian Shortsleeve
Co-Founder & Managing Director
Gabriel Ling
Co-Founder & Managing Director
Sector focus
Frequently asked questions
Who founded M33 Growth and what is their background?
The firm was founded in 2017 by Michael Anello, Brian Shortsleeve, and Gabriel Ling. Anello and Shortsleeve previously held senior roles focused on growth-stage operational investing. The team brought together a hybrid of private equity execution and hands-on operating expertise, positioning M33 as a commercial-scale partner rather than a passive growth-capital provider.
Does M33 Growth participate in early-stage venture rounds or only growth-stage deals?
M33 Growth almost exclusively targets revenue-stage companies generating $10 million to $75 million in annual recurring revenue. The firm does not run a seed or Series A practice. Its model is designed to acquire majority positions in bootstrapped or lightly capitalized businesses that have established product-market fit and need go-to-market execution.
How does M33 Growth source its portfolio companies?
The firm uses a proprietary outbound sourcing model concentrated on founder-owned software and digital health companies. M33 specifically targets businesses outside the coastal venture hubs — particularly in the Midwest and Southeast — that have grown without institutional capital. The partnership pool runs shared origination, and the firm often engages founders through direct conversations about liquidity and scaling, rather than through competitive auction processes.
Is M33 Growth a venture capital firm or a private equity firm?
M33 Growth is structured as a private equity firm that operates with a growth-buyout mandate. It acquires majority control in cash-flowing software companies, a posture closer to traditional growth equity with operating influence than to venture capital. The firm embeds sales and revenue operations resources into its portfolio to drive post-close execution.
What investment stages does M33 Growth typically target?
M33 Growth targets growth-stage and growth-buyout opportunities. The firm writes checks ranging from roughly $30 million to over $100 million per platform, focusing on companies with product-market fit and recurring revenue between $10 million and $75 million. It does not participate in early-stage or pre-revenue venture rounds.
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