AAC Technologies Holdings Inc. — Proxy Solicitation & Information Statement 2022

Aug 2, 2022

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(Incorporated in the Cayman Islands with limited liability)

（於開曼群島註冊成立之有限公司）

(Stock code 股份代號 : 2018)

3 August 2022

Dear Non-registered Shareholder(s)[ (Note)] ,

AAC Technologies Holdings Inc. (the “Company”)

- Extraordinary General Meeting (“EGM”) of the Company to be held on Saturday, 20 August 2022

In view of the ongoing COVID-19 pandemic and recent requirements for prevention and control from the HKSAR government, the EGM of the Company will be held as a virtual meeting, organised at the principal place of business in Hong Kong, on Saturday, 20 August 2022 at 9:30 a.m. The Shareholders are through online access to attend, participate and vote at the EGM. Shareholders attending the EGM using the Online Platform will be able to cast their votes and submit questions at this virtual EGM meeting. The Company strongly encourages the Shareholders: (i) via the Online Platform, to exercise your rights to attend and vote at the EGM; or (ii) to appoint the chairman of the EGM as your proxy to vote on relevant resolutions.

Online Attendance at the EGM

You, as a Non-registered Shareholder whose shares are held in the Central Clearing and Settlement System (CCASS) through banks, brokers, custodians, nominees or HKSCC Nominees Limited (together, the “Intermediary”), may opt to attend the EGM online. If you choose to attend the EGM online, you will be able to view a live webcast of the EGM, cast your votes on the resolutions in real time and submit online questions to the Company. From 9:00 a.m. on Saturday, 20 August 2022, you can log in to the EGM online platform by visiting http://meetings.computershare.com/MJRN7N2.

In order to attend the EGM online, you need to (i) contact your Intermediary to appoint you as a proxy and (ii) provide your e-mail address to your Intermediary, before the deadline required by your Intermediary. Details regarding the EGM arrangements including the login details to access the EGM online platform will be sent by Computershare Hong Kong Investor Services Limited, the Company’s Hong Kong Branch Share Registrar, to the e-mail address provided by you.

If you require any technical support during login or have any question in relation to this letter, please call the telephone hotline of Computershare Hong Kong Investor Services Limited, the Company’s Hong Kong Branch Share Registrar, at (852) 2862 8555 during business hours from 9:00 a.m. to 6:00 p.m., Monday to Friday, excluding Hong Kong public holidays. Please note that the hotline service hours of our Branch Share Registrar will be extended from 8:45 a.m. to 10:30 a.m. on the day of the Extraordinary General Meeting.

By Order of the Board AAC Technologies Holdings Inc. Ho Siu Tak Jonathan Company Secretary

Note: This Letter is addressed to Non-registered Shareholder(s) of the shares in the Company (“ Non-registered Shareholder ” means such person or company whose shares are held in the Central Clearing and Settlement System (CCASS) and who has notified the Company from time to time through Hong Kong Securities Clearing Company Limited that he/she/it wishes to receive the Corporate Communications). If you have sold or transferred your shares in the Company, please disregard this Letter.

各位非登記股東（附註）：

瑞聲科技控股有限公司（「本公司」） - 於 2022 年 8 月 20 日（星期六）舉行之本公司股東特別大會（「股東特別大會」）

鑒於新冠肺炎疫情持續及近期香港特區政府實施預防及控制病毒傳播規定，本公司之股東特別大會將於 2022 年 8 月 20 日（星期六）上午 9 時 30 分以網上大會方式於香港主要營業地點舉行。股東將以網上方式出席及參與股東特別大會並於會上投票。使用網上平台出席股東特別大會 之股東將可於本網上股東特別大會投票及提交問題。本公司強烈建議股東 (i)透過網上平台行使出席股東特別大會並於會上投票的權利；或 (ii) 委任股東特別大會主席為受委代表以就相關決議案代為投票。

以網上方式出席股東特別大會

如 閣下為通過銀行、經紀、託管商、代理人或香港中央結算（代理人）有限公司（統稱「中介公司」）於中央結算及交收系統（中央結算系 統）持有股份的非登記股東，閣下可選擇以網上方式出席股東特別大會。如 閣下選擇以網上方式出席股東特別大會，將可透過網上直播觀 看股東特別大會，實時就決議案投票，並可於網上向本公司提交問題。由 2022 年 8 月 20 日（星期六）上午 9 時正開始， 閣下可瀏覽 http://meetings.computershare.com/MJRN7N2 以登入股東特別大會網上平台。

閣下須 (i)聯絡 閣下之中介公司以委任 閣下為代表；及 (ii)於 閣下之中介公司所規定之期限前向該中介公司提供 閣下之電郵地址，以便 以網上方式出席股東特別大會。有關股東特別大會安排之詳情（包括進入股東特別大會網上平台之登入資料），將會由本公司之香港股份過戶 登記分處香港中央證券登記有限公司發送至 閣下所提供之電郵地址。

閣下如需要任何技術支援或任何與本函內容有關的疑問，請致電香港股份過戶登記分處香港中央證券登記有限公司電話熱線 (852) 2862 8555， 辦公時間為星期一至星期五（香港公眾假期除外）上午 9 時正至下午 6 時正。股份過戶登記分處在股東特別大會當日將會延長電話熱線服務 由上午 8 時 45 分至上午 10 時 30 分。

代表董事會 瑞聲科技控股有限公司 公司秘書 何紹德

2022 年 8 月 3 日

附註： 此為致本公司股份非登記股東（「 非登記股東 」指所持有本公司股份並存放於中央結算及交收系統（中央結算系統）的人士或公司，透過香港中央結算有限公司不時向本公司 發出通知，表示欲收取公司通訊）之函件。倘 閣下已出售或轉讓所持有之本公司股份，則毋須理會本函件。