Provided by Dow Jones By Kimberly Chin DiamondHead Holdings Corp., a blank-check company, filed for an initial public offering with the U.S. Securities and Exchange Commission on Friday. Also known as a special-purpose acquisition company, DiamondHead plans to offer 30 million units at $10 per unit. Each unit will consist of a share of common stock and one-fourth of a redeemable warrant. Each warrant enables the holder to buy a share for $11.50 apiece. Underwriters will also be given a 45-day option to buy up to 4.5 million additional units to cover any over-allotments, the company said. DiamondHead's sponsor DHP SPAC-II Sponsor LLC and certain institutional investors, including funds and accounts managed by subsidiaries of BlackRock Inc. and Millennium Management LLC, have committed to purchase an aggregate of 5.3 million warrants at $1.50 per warrant in a private placement.