Sotera Health has filed with the SEC to confirm its intent to raise nearly $1.1 billion in an initial public offering.

Broadview Heights, Ohio-based Sotera Health said in the filing out yesterday that it expects to sell 46.6 million shares of its common stock at an assumed IPO price of $21.50 per share, totaling $949.3 million. However, if underwriters exercise their option to purchase additional shares in full, that total would reach $1.0917 billion.

Sotera Health works with Sterigenics, Nelson Labs and Nordion to provide sterilization and lab testing services to medical device and pharmaceutical companies around the world.

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