Cultivating Growth & Prosperity
JM Longyear is a family-owned and professionally managed investment and operating company with a diverse portfolio spanning natural resources, advanced manufacturing, real estate, and strategic investments. For more than 150 years, we’ve embraced opportunity with a long-term approach that helps our businesses, people, and communities thrive.
A Diverse Portfolio | One shared purpose
Rooted in Legacy,
Growing for Generations.
Our spirit of innovation began in the 1800s with founder John Munro Longyear and a pioneering approach to natural resources. More than 150 years later, that same entrepreneurial spirit continues to shape how we invest, evolve, and build for what comes next.
Our Approach
Across our branches, a long-term perspective guides how we manage assets, support our companies, and invest in the people and communities around us.
EMBRACING OPPORTUNITY
We remain entrepreneurial and open to new possibilities across industries.
GROWING LONG-TERM VALUE
We make decisions with lasting performance and prosperity in mind.
HELPING PEOPLE & COMMUNITIES THRIVE
Our success is connected to the strength of our businesses, people, communities, and environment.
Our 2025 impact study indicated that JML's economic contribution supported 742 jobs in Michigan with 617 of those jobs in the UP.
In the same study, our employment multiplier was 3.4 - meaning that 1 job at JML translates to 3.4 jobs across Michigan as the money we spend is spent and re-spent.