Martin Klenk, cofounder and CTO of Celonis, helped turn a university project into one of Europe’s most valuable software companies by building a global leader in process mining and process intelligence. Since launching Celonis in 2011 with Alexander Rinke and Bastian Nominacher, he has been central to the company’s technical vision, helping scale its platform as major enterprises use it to uncover inefficiencies, optimize operations, and strengthen AI-driven execution. Known for deep product focus and a lower public profile, Klenk stands out as one of the key technical architects behind Celonis’s rise.

Bastian Nominacher, cofounder and co-CEO of Celonis, helped turn a Munich startup into one of Europe’s most valuable software companies by building a global leader in process mining and process intelligence. Since launching Celonis in 2011, he has helped scale the company into a major enterprise software force serving thousands of deployments worldwide, as businesses use its platform to uncover inefficiencies, streamline operations, and make AI more effective in real-world workflows. Known for execution-focused leadership and long-term product conviction, Nominacher has become one of the standout founders in European tech.

Alexander Rinke, cofounder and co-CEO of Celonis, helped turn a university project into one of Europe’s most valuable software companies by building a global leader in process mining and process intelligence. Since cofounding Celonis in 2011, he has guided its rise into a major enterprise software force serving thousands of deployments worldwide, as companies use its technology to uncover inefficiencies, improve operations, and accelerate AI-driven decision-making. Known for product conviction and execution-focused leadership, Rinke has become one of the standout founders in European tech.

William C. Stone, chairman and CEO of SS&C Technologies, built one of the most influential financial software and services companies serving asset managers, banks, and insurers worldwide. Since acquiring SS&C in 1986, Stone expanded the firm through relentless acquisitions and disciplined integration, transforming it into a global platform providing investment management software, fund administration, and financial operations services. Known for aggressive dealmaking and operational efficiency, he has positioned SS&C as a critical infrastructure provider to the global financial industry.

Jeff Green, cofounder and CEO of The Trade Desk, has become one of the most influential leaders in digital advertising by building the world’s leading independent programmatic ad platform. Since launching the company in 2009, he has championed transparency, data-driven buying, and an open internet—positioning The Trade Desk as a counterweight to walled gardens like Google and Meta. Under his leadership, the company has grown into a multibillion-dollar powerhouse serving major brands, agencies, and media companies across the globe. Known for his strategic clarity and outspoken industry perspective, Green has reshaped how digital ads are bought, measured, and optimized.

Ed Hallen is the co‑founder and Chief Product Officer (later Chief Strategy Officer) of Klaviyo, the Boston-based SaaS platform powering email/SMS marketing and customer data for over 100,000 brands, including Unilever and Citizen Watches  . A systems engineering graduate from UVA and MIT Sloan MBA, he previously led product at Applied Predictive Technologies and held roles at Google before launching Team Engine in 2018.

Dan Kurzius is the American co-founder and Chief Customer Officer of Mailchimp. A former web developer and Mailchimp’s first support agent, he built the company’s support organization and champions user advocacy across product and data teams. Known for his focus on customer experience and corporate citizenship, he avoids venture funding and has helped build Mailchimp into a multi-billion‑dollar SaaS success. 

Chad Richison is the American entrepreneur who founded Paycom in 1998 and has served as its President, CEO, and Chairman since inception. A University of Central Oklahoma graduate, he pioneered fully online payroll and HR solutions through Paycom, leading its IPO in 2014, and growing it into a $1.9 billion SaaS company. Richison is also a committed philanthropist—founding the Green Shoe Foundation and donating tens of millions to educational and mental health causes—and is a signatory of The Giving Pledge.

Ben Chestnut is the co-founder and former long-time CEO of Mailchimp, the bootstrapped email marketing and automation platform he helped grow from a side project in 2001 to a $12 billion acquisition by Intuit in 2021. A Georgia Tech–trained industrial designer from humble roots, Chestnut built Mailchimp into a global SaaS powerhouse without venture funding—earning billionaire status and pioneering a “Dragon” exit in tech. 

Anthony Casalena is the founder, CEO, and driving force behind Squarespace—a web‑building pioneer he launched from his University of Maryland dorm room in 2003. Over two decades, he transformed the platform into a billion‑dollar SaaS powerhouse used by millions, navigating a public listing in 2021 and steering the company again through a $6.6 billion take‑private deal in 2024.

Andrew Bialecki is the co‑founder and CEO of Klaviyo, the Boston‑based marketing automation unicorn. A Harvard‑trained engineer and physicist, he bootstrapped Klaviyo since 2012 and retained a rare ~38% ownership at IPO, guiding the company to a multibillion-dollar valuation through disciplined, data‑driven growth.

Alexis Le-Quoc is the co-founder and Chief Technology Officer of Datadog, a leading cloud monitoring and cybersecurity platform used by enterprises worldwide. With a background in engineering and infrastructure, Le-Quoc helped build Datadog into one of the most trusted tools for DevOps, enabling real-time observability across complex systems. His technical leadership has been central to the company’s rapid growth and global adoption.