CMCM Cheetah Mobile Inc

UNITED STATES

SECURITIES AND EXCHANGE COMMISSION

WASHINGTON, D.C. 20549

FORM 6-K

REPORT OF FOREIGN PRIVATE ISSUER

PURSUANT TO RULE 13a-16 OR 15d-16 UNDER

THE SECURITIES EXCHANGE ACT OF 1934

For the month of April 2015

Commission File Number: 001-36427

CHEETAH MOBILE INC.

12/F, Fosun International Center Tower

No. 237 Chaoyang North Road

Chaoyang District, Beijing 100022

People’s Republic of China

(Address of principal executive offices)

Indicate by check mark whether the registrant files or will file annual reports under cover of Form 20-F or Form 40-F.

Form 20-F   x            Form 40-F   o

Indicate by check mark if the registrant is submitting the Form 6-K in paper as permitted by Regulation S-T Rule 101(b)(1): o

Indicate by check mark if the registrant is submitting the Form 6-K in paper as permitted by Regulation S-T Rule 101(b)(7): o

SIGNATURES

Pursuant to the requirements of the Securities Exchange Act of 1934, the registrant has duly caused this report to be signed on its behalf by the undersigned, thereunto duly authorized.

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Exhibit Index

3

Exhibit 99.1

Cheetah Mobile to Hold Annual General Meeting on May 20, 2015

Beijing, April 27, 2015—Cheetah Mobile Inc. (the “Company” or “Cheetah Mobile”) (NYSE: CMCM), a leading mobile internet company that provides mission critical applications to help make the internet and mobile experience speedier, simpler, and safer for users worldwide, today announced that it will hold its annual general meeting of shareholders at Kingsoft Tower, No. 8 Lianshan Alley, Jingshan Road, Jida, Zhuhai, Guangdong, China, on May 20, 2015 at 2:00 p.m. (local time).

No proposal will be submitted for shareholder approval at the annual general meeting.  Instead, the annual general meeting will serve as an open forum for shareholders of record and beneficial owners of the Company’s American Depositary Shares (“ADSs”) to discuss Company affairs with management.

The Board of Directors of the Company has fixed the close of business on April 27, 2015 as the record date (the “Record Date”) for determining the shareholders entitled to receive notice of the annual general meeting or any adjournment or postponement thereof.

Holders of record of the Company’s Class A and Class B ordinary shares at the close of business on the Record Date are entitled to attend the annual general meeting and any adjournment or postponement thereof in person. Beneficial owners of the Company’s ADSs are welcome to attend the annual general meeting in person.

The Company has filed its annual report (the “Annual Report”), which includes the Company’s audited financial statements for the fiscal year ended December 31, 2014, with the U.S. Securities and Exchange Commission (the “SEC”). The Company’s Annual Report can be accessed on the investor relations section of its website at http://ir.cmcm.com, as well as on the SEC’s website at http://www.sec.gov.

Holders of the Company’s Class A ordinary shares, Class B ordinary shares or ADSs may obtain a copy of the Company’s Annual Report, free of charge, by emailing Ms. Helen Jing Zhu, at IR@CMCM.com or by writing to:

12/F, Fosun International Center Tower
No. 237 Chaoyang North Road
Chaoyang District, Beijing 100022
People’s Republic of China
Attention: Ms. Helen Jing Zhu

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About Cheetah Mobile

Cheetah Mobile is a leading mobile internet company with approximately 395.4 million mobile monthly active users in December 2014. Its mission critical applications, including Clean Master, CM Security, Battery Doctor and Duba Anti-virus, help make the internet and mobile experience speedier, simpler, and safer for users worldwide. Cheetah Mobile is the publisher of Clean Master, the #1 mobile app in the Google Play Tools category worldwide by monthly downloads in December 2014, according to App Annie.

The Company also provides various platform products such as Duba.com, Cheetah browser, game centers, and mobile app stores to provide multiple user traffic entry points and global content distribution channels for its customers.

For more information about Cheetah Mobile, please visit http://www.cmcm.com/en-us/.

For investor and media inquiries, please contact:

Cheetah Mobile Inc.

Helen Jing Zhu

Tel: +8610 6292 7779

Email: IR@CMCM.com

ICR, Inc.

Chenjiazi Zhong

Tel: +1 (646) 417-5395

Email: IR@CMCM.com

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Exhibit 99.2

Cheetah Mobile Inc.

(incorporated in the Cayman Islands with limited liability)

(NYSE Ticker: CMCM)

NOTICE OF ANNUAL GENERAL MEETING

To be held on May 20, 2015

(or any adjourned or postponed meeting thereof)

NOTICE IS HEREBY GIVEN that an annual general meeting (the “AGM”) of Cheetah Mobile Inc. (the “Company”) will be held at Kingsoft Tower, No. 8 Lianshan Alley, Jingshan Road, Jida, Zhuhai, Guangdong, China on May 20, 2015 at 2:00 p.m. (local time).  No proposal will be submitted for shareholder approval at the AGM.  Instead, the AGM will serve as an open forum for shareholders of record and beneficial owners of the Company’s American Depositary Shares (“ADSs”) to discuss Company affairs with management.

The Board of Directors of the Company has fixed the close of business on April 27, 2015 as the record date (the “Record Date”) for determining the shareholders entitled to receive notice of the AGM or any adjournment or postponement thereof.

Holders of record of the Company’s Class A and Class B ordinary shares at the close of business on the Record Date are entitled to attend the AGM and any adjournment or postponement thereof in person.  Beneficial owners of the Company’s ADSs are welcome to attend the AGM in person.

Shareholders and ADS holders may obtain a copy of the Company’s annual report, free of charge, from the Company’s website at http://ir.cmcm.com, or by writing to Ms. Helen Jing Zhu, Cheetah Mobile Inc., 12/F, Fosun International Center, No. 237 Chaoyang North Road, Chaoyang District, Beijing 100022 PRC, or by email to IR@CMCM.com.