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Scheffel Boyle CPAs acquiring Allison Knapp & Siekmann

ullrich siekmannDennis Ulrich, left, a CPA and managing principal at Scheffel Boyle, and Henry Siekmann, CPA and AKS managing principal.


EDWARDSVILLE – Scheffel Boyle, the region’s largest accounting firm, has announced it is acquiring the firm of Allison Knapp & Siekmann.

The deal is effective Oct 1.

In business since 1950, Allison Knapp & Siekmann has office locations in Belleville and Bethalto, where their professionals will remain on staff and continue their current positions as the newest members of the Scheffel Boyle team.

Now that AKS has joined forces with Scheffel Boyle, the full-service accounting, auditing, tax, business, and financial consulting firm has now expanded its footprint in the St. Louis metropolitan area to 10 offices and approximately 100 employees, while adding a greater depth of resources and expertise for their clients.

Scheffel Boyle’s Dennis Ulrich, CPA & managing partner, and Allison Knapp & Siekmann’s Henry Siekmann both feel the acquisition will only further enhance the quality of service.

“Bringing our two firms together is a great step not only for us, but for all our clients. We are constantly growing as a firm, bringing a new level of knowledge and expertise to the work we do. I feel AKS shares our dedication to an exceptional standard of service that we hold dear at Scheffel Boyle,” Ulrich said. “I’m confident that this combination will bring positive changes for both firms and our combined family of clients.”

AKS Managing Principal and CPA Henry Siekmann also believes this news is a step forward for both firms.

“All of my team at AKS is extremely excited to be joining forces with such a reputable firm as Scheffel Boyle. We have had a great working relationship for years and I’m excited to see what we can accomplish together,” Siekmann said. “Joining the Scheffel Boyle team will bring greater knowledge, resources, and fresh industry insight for our associates and clients. We look forward to what the future holds.”

Scheffel Boyle is recognized as the largest locally-owned accounting firm in Southwestern Illinois and as one of the largest accounting firms in the St. Louis region.

Their offices are currently located in Alton, Edwardsville, Belleville, Highland, Jerseyville, Columbia, Carrollton, and Bartelso. Established in 1924, their services include corporate, personal, and governmental tax, auditing, and accounting.

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