Altira Exits ResFrac in Landmark Deal, Fueling Software's Geothermal Push

DENVER, CO – April 28, 2026 – Denver-based venture capital firm Altira Group has announced its successful and complete exit from ResFrac Corporation, a leader in subsurface simulation software. The move comes as ResFrac secures a significant new platform investment from Banneker Partners, a growth-oriented private equity firm. The transaction marks a major validation of Altira’s specialized investment strategy and provides ResFrac with substantial new capital to accelerate its expansion into emerging energy sectors, including enhanced geothermal systems.

This exit is a standout success for Altira Technology Fund VI LP, reinforcing the firm's model of identifying and scaling deeply technical, energy-native software companies into strategic industry assets. For ResFrac, the new partnership with Banneker Partners signals a new era of accelerated growth, aiming to solidify its technology as a foundational tool for the future of energy development.

A Blueprint for Venture Success

For over 28 years, Altira Group has carved a niche by investing at the intersection of energy, software, and industrial operations. The firm’s exit from ResFrac serves as a case study in its 'beyond capital' approach, which combines funding with deep industry integration. Altira’s model leverages strategic limited partners—major oil and gas operators—to validate, refine, and accelerate the adoption of new technologies.

"ResFrac is exactly the type of company Altira was built to support," said Dirk McDermott, Founder and Managing Partner of Altira. "When we first invested, the technical foundation was already exceptional. The opportunity was to help translate that capability into a scalable, mission-critical software platform embedded in how oil and gas operators make subsurface decisions."

Altira's initial investment in ResFrac's Series B round in 2020 came during a significant industry downturn, a testament to the firm's long-term conviction in the software's potential. Over the course of the partnership, Altira did more than just provide capital; it facilitated crucial feedback loops. "From early on, our oil and gas operating partners helped pressure-test the product in real field development decisions, refine workflows, and accelerate adoption," noted Sean Ebert, Senior Partner at Altira. "That's what ultimately drove the shift from a highly capable simulation tool to software that engineers rely on day-to-day."

This hands-on strategy proved critical. As Ebert explained, "technical differentiation alone isn't enough—you have to translate it into how operators actually work." The successful exit validates this philosophy, demonstrating how strategic venture capital can transform a technically brilliant product into an indispensable commercial platform, delivering top-tier returns in the process.

From Simulation Engine to Mission-Critical Platform

Founded in 2015 by Mark McClure, ResFrac distinguished itself with a first-principles physics approach. Its platform is the industry’s only fully integrated hydraulic fracturing and reservoir simulator, allowing engineers to model a well’s entire lifecycle—from the initial fracture stimulation to years of production—within a single, continuous model. This capability provides unprecedented accuracy in predicting well performance and optimizing designs, helping operators maximize resource recovery while minimizing capital risk.

With Altira's support, ResFrac evolved far beyond its initial high-fidelity simulation engine. The company methodically expanded its platform to become a comprehensive subsurface toolkit. New capabilities were added to address the daily needs of engineers, including automated history matching, production optimization, well interference analysis, and Diagnostic Fracture Injection Test (DFIT) interpretation. This transformation was key to its market adoption, making the software an essential part of the engineering workflow for a growing list of global clients, from nimble independents to supermajors and national oil companies.

Powering the Future of Energy: Beyond Oil and Gas

While its roots are firmly in oil and gas, ResFrac's future growth trajectory is increasingly tied to the energy transition. The platform's sophisticated modeling of hydraulic stimulation in complex geological formations has found a powerful new application in Enhanced Geothermal Systems (EGS). EGS aims to unlock vast, clean energy resources by creating engineered reservoirs in hot, low-permeability rock, a process that relies heavily on the same hydraulic fracturing principles that transformed the shale industry.

ResFrac's technology is proving indispensable for designing and de-risking these complex geothermal projects. Companies like Fervo Energy are already utilizing the platform to develop breakthrough EGS stimulation designs, achieving record-breaking flow rates that signal a viable path for geothermal energy at scale. This expansion significantly broadens ResFrac's addressable market and positions it as a critical enabler of next-generation renewable energy.

The company’s ability to bridge the gap between traditional energy expertise and clean energy innovation underscores a larger industry trend. Technologies honed in the oil and gas sector are becoming vital tools for decarbonization, and ResFrac is at the forefront of this convergence.

The New Chapter with Banneker Partners

The platform investment from Banneker Partners, a firm specializing in scaling proven software companies, marks the beginning of ResFrac's next chapter. This new partnership is designed to pour fuel on the fire, providing the operational expertise and financial runway to aggressively scale commercialization, deepen penetration within existing accounts, and continue extending the platform's capabilities.

"Their new investor partnership positions the company to scale commercialization, deepen account penetration, and extend the platform into adjacent subsurface workflows and energy applications," Ebert commented on the transition. "We're very happy to have had the opportunity to work in partnership with Mark and the team and excited to see what comes next!"

For ResFrac, the backing of a growth-focused firm like Banneker validates its market leadership and provides the resources to meet soaring demand. This new alliance provides ResFrac with the capital and operational expertise to not only deepen its presence in its core markets but also to lead the charge in applying advanced simulation to the next generation of energy challenges.