Keystone Construction Partners with Otter & Company Capital Holdings to Accelerate Growth and Innovation
St. Louis, MO – July 8, 2025 – Keystone Construction, a cornerstone in St. Louis' commercial design/build industry, announces an exciting new chapter with its transition to Otter & Company Capital Holdings. Known for their expertise in industrial, sports and entertainment, office, multifamily, retail, and healthcare projects, Keystone is poised to leverage this partnership to drive innovation and expand its market footprint.
Under the continued leadership of President Bill Hardie and Vice President Mike Kaiman, Keystone Construction will continue to deliver cutting-edge structures tailored to client needs. "Partnering with Otter & Company represents a strategic alignment of values and vision," says Hardie. "It allows us to focus on what we do best—creating groundbreaking spaces that redefine our clients' expectations."
Otter & Company, led by seasoned professionals including Tom Kaiman and Jim Cook, brings a wealth of experience in real estate development and strategic growth. This partnership ensures Keystone's commitment to excellence remains steadfast, with plans to enhance service delivery and seek out next-generation innovations in the construction industry.
"We’re incredibly excited to combine Keystone’s legacy of excellence with the resources, expertise, and strategic capabilities we bring to the table at Otter & Co.," says Tom Kaiman, Founder of Otter & Company Capital Holdings. "This partnership is about unlocking growth—empowering Keystone to reach new heights while staying true to what makes them great."
Currently, Keystone is spearheading the CarShield Sportsplex, a state-of-the-art hockey and soccer facility set to revolutionize sports infrastructure in the St. Louis Metro Area. This project exemplifies Keystone's dedication to pushing boundaries and setting new standards in construction excellence.
Keystone will continue to operate under its existing name and maintain its headquarters in Chesterfield, ensuring seamless continuity for clients, partners, and staff. The company remains committed to delivering exceptional service and maintaining its stellar reputation in the industry.
"We are excited about the possibilities this partnership brings," adds Hardie. "With Otter & Company's support, we look forward to writing the next chapter of Keystone Construction's success story."
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About Keystone Construction
For nearly four decades, Keystone Construction has delivered projects that reflect a deep commitment to design excellence, quality craftsmanship, and lasting value. As a full-service general contractor, Keystone simplifies the construction process—offering clients a streamlined, design/build experience tailored to their vision. The company’s award-winning work has earned multiple honors, including Building St. Louis Awards (2017, 2019, 2021), the Project 64 West Excellence in Community Development Award, and the Excellence in Design Award from American Builders Company. Keystone’s innovative approach even served as the basis for a Harvard University course study titled “How to Do Design/Build Right.” Learn more at keystone-stl.com.
About Otter & Co. Capital Holdings
Otter & Co. Capital Holdings (O&Co) is a St. Louis-based investment firm specializing in acquiring, partnering with, and growing small operating businesses across the Midwest and beyond. With a focus on creating sustainable, long-term growth, Otter & Co. Capital Holdings invests strategically to unlock synergies and accelerate business performance through operational excellence and strategic partnerships. Learn more at ottercompanycapital.com.
For more information, contact: Sarah Stiehr, Triple Loop Marketing, 847.946.1880
