Accounting and consulting firm Horne LLP has acquired the cybersecurity firm Halberd Group and established a new unit, Horne Cyber Solutions.

Net@Work founders have acquired the ecommerce practice of Pixafy, a Gold Partner of ecommerce software and platform provider Magento that develops ecommerce websites.

Panalitix, an Australian developer of software tools for public accountants, has acquired 2020 Group USA, a membership and educational group for accounting firms founded by CPA consultant Chris Frederiksen.

Sassetti LLC has merged in Brennan & Brosnan LLC in Naperville, Ill., effective Jan. 1, 2016, expanding Sassetti’s accounting, auditing and tax practice in the suburbs of Chicago.

UHY Advisors has merged in MohnAllen P.C., doubling the firm’s size in the Maryland area.

Ohio accounting firm Whalen & Company CPAs is starting a new venture this year by merging in the QuickBooks consulting firm Simplibooks and launching a new tax preparation service it is calling Simplitax.

Machen McChesney has acquired Wolf & Taunton, a Montgomery Ala.-based accounting firm, effective Dec. 1, 2015.

RKL eSolutions has acquired Sage 100 and manufacturing software provider Baesis to expand the company’s Sage practice.

Dixon Hughes Goodman LLP said Wednesday that Baltimore-based Stegman & Company will join the firm on June 1, 2016.

CBIZ, Inc. has acquired the non-attest business of the San Diego, Calif.-based firm Millimaki Eggert, LLP, effective January 1, 2016, while CBIZ’s affiliated CPA firm Mayer Hoffman McCann P.C. has acquired Millimaki Eggert’s attest business.