Distribution Solutions (DSGR) 8-K Changes in Registrant's Certifying Accountant

Exhibit 16.1

Tel: 312-856-9100 Fax: 312-856-1379 www.bdo.com 330 N Wabash, Suite 3200 Chicago, IL 60611

May 25, 2023

Securities and Exchange Commission

100 F Street N.E.

Washington, D.C. 20549

We have been furnished with a copy of the response to Item 4.01 of Form 8-K for the event that occurred on May 19, 2023, to be filed by our former client, Distribution Solutions Group, Inc. We agree with the statements made in response to that Item insofar as they relate to our Firm.

Very truly yours,

/s/ BDO USA, LLP

BDO USA, LLP, a Delaware limited liability partnership, is the U.S. member of BDO International Limited, a UK company limited by guarantee, and forms part of the international BDO network of independent member firms.

BDO is the brand name for the BDO network and for each of the BDO Member Firms.