Press Release

PRA Acquires Leading Event and Communication Agency, One Smooth Stone

Today, PRA acquired One Smooth Stone, an event and communication agency, based in Chicago, serving industry leading brands globally. For more than 23 years, One Smooth Stone (OSS) has designed and produced events to help global brands achieve strategic objectives. By producing a variety of face-to-face and online business events, engagement strategies and communication campaigns, OSS helps hundreds of companies build beliefs and behaviors critical to achieving their business goals.

L-R: Mark Ledogar, One Smooth Stone, Tony Lorenz, PRA

“Today marks a new day in our endeavor to redefine our business in response to our clients’ expectation of us.” shared Tony Lorenz, CMM, Chief Executive Officer, PRA. “We have been asked by our clients repeatedly to build a toolkit of solutions that will meet more of their needs, especially on a creative and production level, in the delivery of business events. I have known the team at One Smooth Stone for many years and have always had high regard for their work and their culture. Their focus on service is completely in line with our core values at PRA.”

Mark Ledogar, President at OSS, states, “PRA’s strategy for the next generation of business events is spot on. We now have a stronger support system, and a broad footprint to activate anywhere in the world. Together, we provide an end-to-end, integrated solution that spans strategy, messaging, creative and execution, that is compelling to our clients in both organizations. The One Smooth Stone team is ready for an exciting journey ahead at PRA, anchored by our shared love of the live event experience.

One Smooth Stone will operate as One Smooth Stone, a PRA event and communication agency. OSS will align with PRA in all respects over time to underscore a singular PRA brand focus and consistency of service and outcome across all PRA businesses and locations throughout North America and beyond.


Headquartered in Chicago with 27 offices throughout North America, PRA is a leading business event management firm,creating experiences which move hearts, minds, and businesses forward. Through its ownership of events and communication agency One Smooth Stone, PRA offers end-to-end integrated solutions for event experiences.

PRA blends Passion, Reach and Authenticity to consistently deliver incomparable experiences that engage participants and exceed business goals. PRA’s reach runs deep, delivering value to millions of participants over nearly 40 years in every major destination across North America and beyond.  For information on our complete portfolio of services, please visit or email: Follow PRA on our blog or any of the following social media sites.

One Smooth Stone

For more than 23 years, One Smooth Stone, a PRA event and communication agency has created great experiences around the world for leading brands and organizations through the production of live events, creative communications and engagement strategies. As articulated by the agency’s statement of purpose, “We Love Live” is the driving force behind all events and communications projects produced by One Smooth Stone, including product launches, global sales meetings, leadership conferences, customer and channel events and employee engagement programs. For more information, visit or email:

One Comment

  1. Toni Deal November 21, 2018 at 7:07 pm - Reply

    Congratulations! Worked with Mark a few years ago on the CABI 5k when here in San Diego.

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