Quarter Circle 3 Ventures

In June of 1925, at the age of 23, Luis Eisaguirre left his home in the small village of Ibarrangelu in Basque Country of Spain bound for America. He quickly found in the mountains of western Colorado his opportunity. As was tradition, he labored hard as a sheep herder, soon earning his own small herd. He partnered with his brother Rufo and together they entrepreneured a modest but fruitful family business, the original Eisaguirre family venture.

Luis's son Joe was born into this family business, and it was formally passed to him in June, 1962 documented through a formal "Quarter Circle 3" livestock brand conveyance. Joe further expanded the operation to include cattle ranching with properties and leased range operations throughout southwestern Colorado.

Lew Eisaguirre, Joe's son was born into this traditional and entrepreneurial environment. With his father's strong encouragement and sponsorship, he obtained an education in economics with an MBA and the perception that the ranching business model of the time that had run its most fruitful cycle.

Lew seized on the ranching entrepreneurial spirit and launched a number of his own business ventures over the subsequent 30+ years, many successful, some not so, but all focused on potentially disruptive technologies and innovative business models. He also professionally managed a successful venture oriented family office. This inspired and lead to the formation of Quarter Circle 3 Ventures in 2025 combining efforts with his 2 sons Joseph and Jake who had found professional success and skills striking out on their own.

Today QC3 Ventures is founded on the premise that the diversified experience and skills of a integrated family operation and office and convictions of a highly functional team has compounding network. Lew's prior ventures have focused on the emerging technologies of their time while experiencing the volatility of all the major tech cycles of the past 40 years, from the rise of telecom and media, too personal computing and the internet, through the mobile and social media revolution, to today's era of cloud, artificial intelligence, and now physical AI. Coupled with the period's major financial cycles of the dot-com bubble, the 2008 global financial crisis, crypto booms, and periods of rapid expansion and volatility, Lew's journey reflects a deep understanding of both technological transformations, innovations and the economic forces shaping our world.

Joseph and Jake's successful careers are founded on an innovative understanding and experience with data engineering, statistic modeling and research disciplines grounded in real world earth sciences.

Together this generational experience uniquely positions this venture office to develop applied and integrated emerging technologies, and specifically the opportunity of this lifetime: Physical AI.

At QC3 Ventures we look to expand our family and partner with other like-minded enterprises and prospective team members leveraging our experience and commitment in building companies and recruiting effective teams and strategic partners. We are confident to lead initiatives and support others in the development of their big niche ideas within our Physical AI thesis.

Although modest by many capital and family office standards, we are comfortable incubating big niche concepts, seeding ideas, building teams, and rolling up complementary technologies coupled with the experience of growing and combining enterprises to successful exits and IPO.