By Colin Kellaher

Csquare unveiled plans for an initial public offering that could give the data-center company backed by Brookfield an initial market capitalization topping $4 billion.

Csquare on Monday said it plans to sell 50 million shares at between $23 and $27 apiece in the IPO.

At the $25 midpoint of that price range, the Coppell, Texas, company said it expects net proceeds of about $1.19 billion, or roughly $1.37 billion if the underwriters exercise an option to buy an additional 7.5 million shares.

Csquare said it would have nearly 202.1 million shares outstanding after the IPO, assuming an exercise of the overallotment option, for a market capitalization of nearly $4.4 billion at the high end of pricing at $27 a share.

Alternative asset manager and investment firm Brookfield, which formed Csquare by combining Evoque Data Center Solutions and Cyxtera Technologies, will still own about 64% of the company after the IPO, assuming an exercise of the greenshoe.

Csquare said it has applied to list its shares on the New York Stock Exchange under the symbol CSQR.

Write to Colin Kellaher at colin.kellaher@wsj.com