Current Business Investments

Storm Source Software

StormSource Software is the developer of a product, Appointment-Plus, that is a leading online appointment scheduling software company (SaaS).

Main Street Gourmet

Main Street Gourmet is a custom bakery specializing in custom foods such as cookies, muffins, brownies, granola, loaf cakes, toppings and desserts.


D-Tools designs, maps and documents Internet connected devices such as cameras, speakers, sensors, lights, and more. It is used by corporate IT staffs to document their campuses, integrators to propose and install complex systems, government agencies, colleges, and more.

Real Estate Institute

Real Estate Institute and Bookmark Education provide continuing education for real estate, mortgage, insurance, and legal professionals.

Sites for Law Firms

Sites for Law Firms provides websites for law firms with built in marketing and self-editable content.

Murphy Business Brokerage

Murphy Business logo
Murphy Business is the #1 business brokerage company in North America.

Summit Professional Education

Summit Professional Education
Summit Professional Education provides continuing education for allied health professionals. provides world-class animation education online.

Lapels Dry Cleaning

Lapels Dry Cleaning is the future of dry cleaning providing environmentally friendly dry cleaning services and free local delivery services.

ProHome International

ProHome International provides reliable and innovative Third-Party Quality Assurance Programs and Warranty Management Systems for thousands of new home builders.

Capstone Event Group

With a portfolio of races serving 110,000 runners annually, Capstone Races is the premier running series in North America.

Grand Welcome

Grand Welcome is the premier vacation rental property management company in the United States.

Previous Investments

ABC Sports Camps

ABC Sports Camps provides registration services for sport camps and events while offering complete online management, marketing and reporting tools.


Onsource is a platform that connects insurance companies who need photos taken to a network of independent contractors who take photos.

Selected Business Investments Prior to the
Formation of Greybull Stewardship

National Holistic Institute

National Holistic Institute is the leading college of massage therapy in the United States. The school was founded in 1979 and was the first massage therapy school accredited in California and one of the first in the world. It’s faculty and staff have won numerous awards and recognitions, and it has been a leader in massage education for decades. The college currently has seven campuses in California.


Zipcar is the world’s leading car-sharing service with more than 400,000 members and 7,000 vehicles in urban areas and college campuses throughout the United States, Canada and the United Kingdom. Zipcar offers more than 30 makes and models of self-service vehicles by the hour or day to residents and businesses looking for an alternative to the high costs and hassles of owning a car.