Omega II is offering 90 kronor per share.
The Board of Directors of Fortnox recommends that shareholders accept the bid, writes Fortnox in a separate press release.
The bid – described as "reasonable from a financial perspective" in a statement from Ernst & Young – has a premium of 38 percent compared to the closing price of the Fortnox share on Friday.
Fortnox's Chairman of the Board Olof Hallrup did not participate in the decision to recommend that shareholders accept the bid, as he, through the company First Kraft, is part of the consortium that made the bid.