Anton Oilfield Services Group — Proxy Solicitation & Information Statement 2013

May 19, 2013

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Anton Oilfield Services Group 安東油田服務集團

(incorporated in the Cayman Islands with limited liability) Stock Code: 3337

16 May 2013

Dear Investor[(Note)] ,

“ ” – “ ” Anton Oilfield Services Group (the Company ) EGM Circular (the Current Corporate Communications )

We are pleased to inform you that the English and Chinese versions of the Current Corporate Communications are now available on Hong Kong Exchanges and Clearing Limited’s website at www.hkexnews.hk and the Company’s website at www.antonoil.com. You may access the Current Corporate Communications by clicking “Investor Relationship – Company Information” on the homepage of the Company’s website.

If you want to receive a printed copy of the Current Corporate Communications, please complete the request form (the “ Request Form ”) on the reverse side and send it to the Company c/o the Company’s Hong Kong share registrar, Computershare Hong Kong Investor Services Limited, by post using the mailing label at the bottom of the Request Form (no stamp is needed if posted in Hong Kong). The address of the Company’s Hong Kong share registrar is 17M Floor, Hopewell Centre, 183 Queen’s Road East, Wan Chai, Hong Kong. You may also send an email with a scanned copy of the Request Form to antonoil@computershare.com.hk. The Company’s Hong Kong share registrar will arrange to send the printed copy of the Current Corporate Communications to you upon receipt of the Request Form.

If you have any query about how to obtain a copy of the Current Corporate Communications or how to access the Current Corporate Communications on the Company’s website, please contact us at (852) 2862 8688 during business hours from 9:00 a.m. to 6:00 p.m., Monday to Friday, excluding public holidays.

Yours faithfully, Anton Oilfield Services Group

Note: This notification letter is being sent to the non-registered holders of the shares of the Company, whose shares are held in Central Clearing and Settlement System (CCASS) and who have notified the Company through Hong Kong Securities Clearing Company Limited that they wish to receive the Current Corporate Communications. If you have sold or transferred your shares in the Company, please disregard this notification letter and the Request Form enclosed.

致投資者[(][附註][)] ：

「 － “ ” 安東油田服務集團（ 本公司」） 特別股東大會通函 ( 本次公司通訊文件 )

本公司欣然知會 閣下本公司之本次公司通訊文件的中、英文版本現已登載於香港交易及結算所有限公司之披露易網站 （ www.hkexnews.hk ）及本公司網站（ www.antonoil.com ）。 閣下可於本公司網址首頁點擊「投資者關係 - 公司資料」 , 即可下載及瀏 覽本次公司通訊文件。

倘 閣下欲收取本次公司通訊文件之印刷本，請填妥在本函背面的申請表格（「申請表格」），並使用申請表格下方的郵寄標籤 寄回本公司之香港股份過戶處，香港中央證券登記有限公司（如在香港投寄則毋須貼上郵票），地址爲香港灣仔皇后大道東 183 號 合和中心 17M 樓。 閣下亦可把已填妥之申請表格的掃描副本電郵到 antonoil@computershare.com.hk 。本公司之香港股份過戶處在收到 申請表格後會安排寄發本次公司通訊文件的印刷本予 閣下。

倘 閣下對於如何索取本次公司通訊文件或如何在本公司網站上閱覽本次公司通訊文件有任何疑問 , 請致電本公司電話熱線 (852) 2862 8688 ，辦公時間為星期一至五上午 9 時正至下午 6 時正（公眾假期除外）。

安東油田服務集團 謹啟

2013 年 5 月 16 日

附註：本通知函件收件對象為本公司非登記股份持有人。該等人士的股份存放於中央結算及交收系統（中央結算系統）及他們已經通過香港中央結算有限公司通知本公司， 希望收到本次公司通訊文件。如果 閣下已出售或轉讓所持有的本公司股份，則無需理會本通知函件及所附申請表格。

Request Form 申請表格

To: Anton Oilfield Services Group (the “Company”) 致： 安東油田服務集團 ( 「本公司」 ) (Stock Code: 3337) （股份代號： 3337 ） c/o Computershare Hong Kong Investor Services Limited 經香港中央證券登記有限公司 17M Floor, Hopewell Centre, 香港灣仔皇后大道東 183 號 183 Queen’s Road East, 合和中心 17M 樓 Wanchai, Hong Kong

I/We would like to receive a printed copy of the EGM Circular of the Company as indicated below: 本人／我們希望以下列方式收取 貴公司之 特別股東大會通函 之印刷本：

(Please mark ONLY ONE （ X ） of the following boxes)

( 請從下列選擇中，僅在其中 一個空格 內劃上「 X 」號 )

• I/We would like to receive the printed English version.

• □ 本人／我們希望收取一份英文印刷本。

I/We would like to receive the printed Chinese version. □ 本人／我們希望收取一份中文印刷本。

I/We would like to receive both the printed English and Chinese versions. □ 本人／我們希望收取英文和中文各一份印刷本。

Contact telephone Signature number Date 簽名 聯絡電話號碼 日期

Notes 附註：

1. This Request Form is to be completed by the non-registered holders of the shares of the Company, whose shares are held in Central Clearing and Settlement System (CCASS) and who have notified the Company through Hong Kong Securities Clearing Company Limited that they wish to receive the Current Corporate Communication. Please complete all your details clearly.

2. 本申請表格應由本公司非登記股份持有人填寫。該等人士的股份存放於中央結算及交收系統（中央結算系統），他們並已經通過香港中央結算有限公司通知 本公司，希望收到本次公司通訊文件。請 閣下清楚填妥所有資料。

3. Any form with more than one box marked (X), with no box marked (X), with no signature or otherwise incorrectly completed will be void. 如在本表格作出超過一項選擇、或未有作出選擇、或未有簽署、或在其他方面填寫不正確，則本表格將會作廢。

4. For the avoidance of doubt, we do not accept any special instructions written on this Request Form. 為免存疑，任何在本申請表格上的額外手寫指示，本公司將不予處理。

AOSH-16052013-1(1)

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郵寄標籤 MAILING LABEL

閣下寄回此申請表格時，請將郵寄標籤剪貼於信封上。 如在本港投寄毋須貼上郵票。 Please cut the mailing label and stick this on the envelope to return this Request Form to us.

No postage stamp necessary if posted in Hong Kong.

香港中央證券登記有限公司 Computershare Hong Kong Investor Services Limited 簡便回郵號碼 Freepost No. 37 香港 Hong Kong