Selling Stockholders

Affiliates of Warburg Pincus are selling all 22,965,437 shares held and certain investment funds managed by Yorktown Partners LLC are selling 3,000,000 shares held.

Total Shares Offered by the Selling Stockholders

25,965,437 shares of common stock.

Total Shares Outstanding After This Offering

503,419,919 shares of common stock.

Use of Proceeds

The Company will not receive any proceeds from the sale of shares of common stock by the selling stockholders in this offering.

Exchange Listing

Our common stock is traded on the New York Stock Exchange under the symbol “AM.”

Dividend Policy

Our board of directors declared a cash dividend on the shares of our common stock of $0.3075 per share for the quarter ended September 30, 2019, which will be payable on November 13, 2019 to stockholders of record as of November 1, 2019. As the record date has already passed, investors in this offering will not be entitled to such dividend.

We are not obligated to pay dividends on shares of our common stock. Subject to preferences that may be applicable to any outstanding shares or series of preferred stock, holders of our common stock are only entitled to receive ratably such dividends (payable in cash, stock or otherwise), if any, as may be declared from time to time by our board of directors out of funds legally available for dividend payments. Our board of directors makes a determination each quarter as to the actual amount, if any, of dividends to pay on our common stock, based on various factors, some of which are beyond our control, including our operating cash flows, our working capital needs, our ability to access capital markets for debt and equity financing on reasonable terms, the restrictions contained in our debt instruments, our debt service requirements, credit metrics and the cost of acquisitions, if any. We may not have sufficient cash each quarter to pay dividends or maintain current or expected levels of dividends. Accordingly, we cannot guarantee that we will declare any future dividends.

Lock-up Agreements

We and investment funds affiliated with Yorktown Partners LLC have agreed that, subject to certain exceptions, without the prior written consent of the underwriter, we and they will not directly or indirectly, (1) offer for sale, sell, pledge or otherwise dispose of any shares of common stock (other than shares of common stock issued pursuant to employee benefit plans, qualified stock option plans or other employee compensation plans existing on the date of this prospectus or described herein) or sell or grant options, rights or warrants with respect to any shares of common stock, (2) enter into any swap or other derivatives transaction that transfers to another, in whole or in part, any of the economic benefits or risks of ownership of the shares of common stock, whether any such transaction described in clause (1) or clause (2) is to be settled by delivery of the shares of common stock or other securities, in cash or otherwise, (3) file or cause to be filed a registration statement, including any amendments thereto, with respect to the registration of any shares of common stock or securities convertible, exercisable or exchangeable into shares of common stock or any of our other securities (other than any registration statement on Form S-8), or (4) publicly disclose the intention to do any of the foregoing for a period of 30 days after the date of this prospectus.

The underwriter, in its sole discretion, may release the shares of common stock and other securities subject to the lock-up agreements described above in whole or in part at any time with or without notice. When determining whether or not to release shares of common stock and other securities from lock-up agreements, the underwriter will consider, among other factors, the holder’s reasons for requesting the release, the number of shares of common stock and other securities for which the release is being requested and market conditions at the time.