Item 12. SECURITY OWNERSHIP OF CERTAIN BENEFICIAL OWNERS AND MANAGEMENT AND RELATED STOCKHOLDER MATTERS

We incorporate by reference in this Item 12 the information relating to ownership of our common stock by certain persons contained under the headings "Common Stock Ownership-Common Stock Ownership by Management" and "Common Stock Ownership-Common Stock Ownership by Non-Management Shareholders" from our 2019 Proxy Statement.

The following table provides certain information as of December 31, 2018 concerning the shares of our common stock that may be issued under existing equity compensation plans. For more information on these plans, see "Note 12—Share-Based Awards and Options" in the notes to the accompanying consolidated financial statements.

The number of securities remaining available for future issuance under equity compensation plans reflected in column (c) above includes 10,610,164 shares authorized for issuance under our 2011 Amended and Restated Incentive Plan, all of which are available for issuance pursuant to grants of full-value stock awards, 2,173,140 shares authorized under our 2000 Employee Stock Purchase Plan, 33,684 shares authorized under our Amended and Restated 2005 Incentive Plan and 66,336 shares authorized under our 2000 Non-Employee Director Stock Option Plan. We do not intend to issue shares under either the Amended and Restated 2005 Incentive Plan or the 2000 Non-Employee Director Stock Option Plan.