Mark J. Lotke is the Founder and Managing Partner of Harmony Partners. See sector focus and contact routes.
Mark J. Lotke is the Founder and Managing Partner of Harmony Partners, a New York-based venture capital firm he established in 2010 after leading the software group at FTV Capital and serving as a pre-IPO Managing Director at Internet Capital Group. He invests exclusively in expansion-stage high-growth software, internet, and tech-enabled companies, primarily in the United States. Harmony Partners typically leads Series A and B rounds, deploying flexible growth capital with check sizes ranging from $30 million to $50 million per company. His notable portfolio includes Klaviyo, UiPath, Postmates, and Arctic Wolf, with investments spanning over 75 technology companies totaling more than $750 million. Lotke distinguishes himself by providing “founder-friendly” expansion capital and has held board roles at companies like Bambuser and Axonify, reflecting a hands-on governance approach. He has not published public investment essays, but his 25+ year track record since 1993 underscores a consistent focus on scalable software businesses.
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