Box, Inc. disclosed tonight it filed a registration statement with the Securities and Exchange Commission for a proposed initial public offering of its common stock. The number of shares to be sold and the price range for the proposed offering have not yet been determined.

Box has developed a content sharing platform for companies and individuals using cloud services, an industry that encompasses a broad swathe of the tech sector, including Google (GOOG), NetSuite (N), WorkDay (WDAY) and Salesforce.com (CRM).

In Other After-Hours News

Shares of CommScope Holding Company (NASDAQ:COMM) are down nearly 2% after-hours as the telecommunications company said it has commenced an offering to sell 17.5 million shares of its common stock by an affiliate of The Carlyle Group. The selling stockholder has also granted the underwriters a 30-day option to purchase up to an additional 2,625,000 shares of COMM’s common stock. COMM will not receive any of the proceeds from the offering of shares by the selling stockholder.

COMM is down 1.7% at $24 in Monday’s after-hours trade, trending near the stock’s 52-week high of $25.89.

Shares of Medivation (NASDAQ:MDVN) are higher in Monday’s after-hours trade as Astellas Pharma says it has obtained marketing approval of the companies’ co-developed oral androgen receptor signaling inhibitor, XTANDI capsules 40mg for the treatment of patients with castration-resistant prostate cancer in Japan. Astellas filed the application for approval in Japan in May 2013. Upon receiving this marketing authorization in Japan, Astellas will provide MDVN with a $15 million milestone payment.