Sun Printing, Heyrman Printing & Delzer
Now Operating as PROOF.
About the company
Location: Wausau, WI | Green Bay, WI | Waukesha, WI
Acquired: 2023 & 2024
These three companies form a family of commercial printers offering digital, offset, and large-format printing, along with creative services, branding support, promotional products, and fulfillment.
“I think Wisconsin River Partners is a good option. They give you the resources that you need to keep the business going and to also grow the business.”
Partnership Journey-
Sun, Heyrman, and Delzer now operate together under PROOF., reflecting a shared commitment to quality, creativity, and service.
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We saw strong leadership, deep customer relationships, and an opportunity to strategically align complementary printing capabilities across Wisconsin.
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We’ve supported investment in updated technology, including an MIS tool that helps integrate operations across locations, strengthened collaboration, and maintained the legacy of each operation while building toward a more unified customer experience.
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We’re focused on smart, thoughtful integration to help PROOF. scale while staying grounded in Wisconsin craftsmanship.