Archrock, Inc.

Stockholder of Record. If you are a stockholder of record, you may vote over the telephone, by Internet, by mailing in a proxy card, in person at the Annual Meeting or you can give a proxy to be voted at the meeting. Please refer to the specific voting instructions set forth on the Notice of Internet Availability of Proxy Materials.

Street Name Holder. If, like most of our stockholders, you hold your shares through a bank, broker or other nominee (in “street name”), you must vote your shares in the manner prescribed by your bank, broker or other nominee. Your broker or other nominee will either explain how to vote your stock or enclose a voting instruction card for you to use in directing the broker or other nominee how to vote your stock. If you are a street name holder, you may vote your stock in person at the Annual Meeting only if you obtain a signed proxy from your broker or other nominee giving you a right to vote the stock.