Table of Contents

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

OF THE SECURITIES EXCHANGE ACT OF 1934

For the month of February 2017

Commission File Number: 001-36397

Weibo Corporation

(Registrant’s Name)

No.8 Sina Plaza, Courtyard 10, the West
XiBeiWang E. Road, HaiDian District
Beijing 100193, 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 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

Table of Contents

TABLE OF CONTENTS

Press Release regarding Financial Results of Fourth Quarter and Fiscal Year 2016 Ended December 31, 2016 Issued by Weibo Corporation on February 22, 2017

2

Table of Contents

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.

3

Exhibit 99.1

Weibo Reports Fourth Quarter and Fiscal Year 2016 Financial Results

BEIJING, China, February 22, 2017—Weibo Corporation (“Weibo” or the “Company”) (NASDAQ: WB), a leading social media in China, today announced its unaudited financial results for the fourth quarter and fiscal year ended December 31, 2016.

Fourth Quarter 2016 Highlights

·                  Net revenues increased 43% year over year to $212.7 million, exceeding the Company’s guidance between $205 million and $210 million.

·                  Advertising and marketing revenue increased 45% year over year to $187.9 million.

·                  Weibo Value-Added Services (“VAS”) revenue increased 28% year over year to $24.9 million.

·                  Net income attributable to Weibo increased 125% year over year to $43.0 million, and diluted net income per share was $0.19, compared to $0.09 for the same period last year.

·                  Non-GAAP net income attributable to Weibo increased 134% year over year to $77.0 million, and non-GAAP diluted net income per share was $0.34, compared to $0.15 for the same period last year.

·                  Adjusted EBITDA increased 111% year over year to $78.2 million.

·                  Monthly active users (“MAUs”) in December 2016 grew 33% year over year to 313 million, 90% of which were mobile users. Average daily active users (“DAUs”) in December 2016 grew 30% year over year to 139 million.

Fiscal Year 2016 Highlights

·                  Net revenues increased 37% year over year to $655.8 million.

·                  Advertising and marketing revenue increased 42% year over year to $571.0 million.

·                  Weibo VAS revenue increased 12% year over year to $84.8 million.

·                  Net income attributable to Weibo increased 211% year over year to $108.0 million, and diluted net income per share was $0.48, compared to $0.16 for the same period last year.

·                  Non-GAAP net income attributable to Weibo increased 167% year over year to $183.5 million, and non-GAAP diluted net income per share was $0.82, compared to $0.32 for the same period last year.

·                  Adjusted EBITDA increased 126% year over year to $193.7 million.

“Our growth in the fourth quarter was exceptional, with ad revenue from key accounts and SMEs doubling year over year. Weibo’s user scale, breadth of ad offering and leadership as a social media platform in China put us in a unique position to take advantage of the marketing budget shift toward mobile, social and video.” said Gaofei Wang, Weibo’s CEO. “Our focus to grow scale in users, content creators, customers on our platform is translating into significant operating leverage.”

Fourth Quarter 2016 Financial Results

For the fourth quarter of 2016, Weibo reported net revenues of $212.7 million, compared to $149.0 million for the same period last year. Advertising and marketing revenue totaled $187.9 million, compared to $129.5 million for the same period last year. Advertising and marketing revenue from key accounts and small & medium-sized enterprises (SMEs) was $163.2 million, compared to $81.3 million for the same period last year. Revenue from Alibaba was $24.7 million, compared to $48.2 million for the same period last year. Weibo VAS revenue totaled $24.9 million, compared to $19.5 million for the same period last year.

Costs and expenses for the fourth quarter of 2016 totaled $149.1 million, compared to $123.2 million for the same period last year. Non-GAAP costs and expenses were $139.2 million, compared to $116.3 million for the same period last year. The increase in non-GAAP costs and expenses was primarily due to an increase in marketing expenses, value added taxes and commission-based salaries, with the latter two increases primarily resulting from higher revenues.

Income from operations for the fourth quarter of 2016 was $63.7 million, compared to $25.8 million for the same period last year. Non-GAAP income from operations was $73.5 million, compared to $32.8 million for the same period last year.

Non-operating loss for the fourth quarter of 2016 was $21.3 million, which included investment impairment of $24.2 million. Non-operating loss for the same period last year was $5.8 million.

Net income attributable to Weibo for the fourth quarter of 2016 was $43.0 million, or diluted net income per share of $0.19, compared to $19.1 million for the same period last year, or diluted net income per share of $0.09. Non-GAAP net income attributable to Weibo for the fourth quarter of 2016 was $77.0 million, or diluted net income per share of $0.34, compared to $32.9 million for the same period last year, or diluted net income per share of $0.15.

As of December 31, 2016, Weibo’s cash, cash equivalents and short-term investments totaled $396.0 million. For the fourth quarter of 2016, cash provided by operating activities was $82.3 million, capital expenditures totaled $6.5 million, and depreciation and amortization expenses amounted to $3.5 million.

Fiscal 2016 Financial Results

For 2016, Weibo reported net revenues of $655.8 million, compared to $477.9 million in 2015. Advertising and marketing revenue totaled $571.0 million, compared to $402.4 million in 2015. Advertising and marketing revenue from key accounts and SMEs was $513.1 million, compared to $258.8 million for 2015. Revenue from Alibaba was $57.9 million, compared to $143.7 million for 2015. Weibo VAS revenue totaled $84.8 million, compared to $75.5 million for 2015.

Costs and expenses for fiscal 2016 totaled $514.8 million, compared to $440.4 million for 2015. Non-GAAP costs and expenses were $477.2 million, compared to $412.5 million for 2015. The increase in non-GAAP costs and expenses was primarily due to an increase in marketing expenses, bad debt expenses, value added taxes and commission-based salaries, with the latter three primarily resulting from higher revenues.

Income from operations for fiscal 2016 was $141.0 million, compared to $37.5 million for 2015. Non-GAAP income from operations was $178.6 million, compared to $65.4 million for 2015.

Non-operating loss for fiscal 2016 was $31.0 million, which included investment related impairment of $40.2 million. Non-operating loss for 2015 was $0.7 million.

Net income attributable to Weibo for fiscal 2016 was $108.0 million, or diluted net income per share of $0.48, compared to $34.7 million for 2015, or diluted net income per share of $0.16. Non-GAAP net income attributable to Weibo for fiscal 2016 was $183.5 million, or diluted net income per share of $0.82, compared to $68.8 million for 2015, or diluted net income per share of $0.32.

Business Outlook

For the first quarter of 2017, Weibo estimates that its net revenues to be between $185 million and $190 million, which assumes a RMB to US dollar average exchange rate of 6.9448. This forecast reflects Weibo’s current and preliminary view, which is subject to change.

Non-GAAP Measures

This release contains the following non-GAAP financial measures: non-GAAP costs and expenses, non-GAAP income from operations, non-GAAP net income attributable to Weibo, non-GAAP diluted net income per share attributable to Weibo and adjusted EBITDA. These non-GAAP financial measures should be considered in addition to, not as a substitute for, measures of the Company’s financial performance prepared in accordance with U.S. GAAP.

The Company’s non-GAAP financial measures exclude stock-based compensation, amortization of intangible assets, net gain on the sale of investments and impairment on investments, and dividend income, loss attributable to non-controlling interest, and provision for income tax related to the amortization of intangible assets (Other non-GAAP to GAAP reconciling items have no tax effect). Adjusted EBITDA excludes interest income, income tax expenses, and depreciation expenses. The Company’s management uses these non-GAAP financial measures in their financial and operating decision-making, because management believes these measures reflect the Company’s ongoing operating performance in a manner that allows more meaningful period-to-period comparisons. The Company believes that these non-GAAP financial measures provide useful information to investors and others in the following ways: (i) in comparing the Company’s current financial results with the Company’s past financial results in a consistent manner, and (ii) in understanding and evaluating the Company’s current operating performance and future prospects in the same manner as management does, if they so choose. The Company also believes that the non-GAAP financial measures provide useful information to both management and investors by excluding certain expenses, gains (losses) and other items (i) that are not expected to result in future cash payments or (ii) that are non-recurring in nature or may not be indicative of the Company’s core operating results and business outlook.

Use of non-GAAP financial measures has limitations. The Company’s non-GAAP financial measures do not include all income and expense items that affect the Company’s operations.  They may not be comparable to non-GAAP financial measures used by other companies.  Accordingly, care should be exercised in understanding how the Company defines its non-GAAP financial measures. Reconciliations of the Company’s non-GAAP measures to the nearest comparable GAAP measures are set forth in the section below titled “Unaudited Reconciliation of Non-GAAP to GAAP Results.”

Conference Call

Weibo will host a conference call at 8 PM – 9 PM Eastern Time on February 22, 2017 (or 9 AM — 10 AM Beijing Time on February 23, 2017) to present an overview of the Company’s financial performance and business operations. A live webcast of the call will be available through the Company’s corporate website at http://ir.weibo.com. The conference call can be accessed as follows:

US Toll Free:  +1 866-519-4004

Hong Kong Toll Free:  800-906-601

China Toll Free:  400-620-8038

International:  +65 6713-5090

Passcode for all regions:  71928899

A replay of the conference call will be available through midnight, Eastern Time on March 1, 2017. The dial-in number is +61 2-8199-0299. The passcode for the replay is 71928899.

About Weibo Corporation

Weibo is a leading social media for people to create, share and discover Chinese-language content. Weibo combines the means of public self-expression in real time with a powerful platform for social interaction, as well as content aggregation and distribution. Any user can create and post a feed of up to 140 Chinese characters and attach multi-media or long-form content. User relationships on Weibo may be asymmetric; any user can follow any other user and add comments to a feed while reposting. This simple, asymmetric and distributed nature of Weibo allows an original feed to become a live viral conversation stream.

Weibo enables its advertising and marketing customers to promote their brands, products and services to users. Weibo offers a wide variety of advertising and marketing solutions to its customers, ranging from large brand advertisers to Alibaba/e-commerce merchants to small and medium sized enterprises to individuals. The Company generates a substantial majority of revenues from the sale of advertising and marketing services, including the sale of social display ads, promoted feeds and event-based ad solutions. Weibo has developed and is continuously refining its social interest graph recommendation engine, which enables its customers to perform people marketing and target audiences based on user demographics, social relationships, interests and behaviors, to achieve greater relevance, engagement and marketing effectiveness.

Safe Harbor Statement

This press release contains forward-looking statements that relate to, among other things, Weibo’s expected financial performance and strategic and operational plans (as described, without limitation, in the “Business Outlook” section and in quotations from management in this press release. Weibo may also make forward-looking statements in the Company’s periodic reports to the U.S. Securities and Exchange Commission (“SEC”), in press releases and other written materials and in oral statements made by its officers, directors or employees to third parties. Statements that are not historical facts, including statements about the Company’s beliefs and expectations, are forward-looking statements. These forward-looking statements can be identified by terminology, such as “will,” “expects,” “anticipates,” “future,” “intends,” “plans,” “believes,” “confidence,” “estimates” and similar statements. Forward-looking statements involve inherent risks and uncertainties. A number of important factors could cause actual results to differ materially from those contained in any forward-looking statement. Potential risks and uncertainties include, but are not limited to, Weibo’s limited operating history in certain new businesses; failure to grow active user base and the level of user engagement; the uncertain regulatory landscape in China; fluctuations in the Company’s quarterly operating results; the Company’s reliance on advertising and marketing sales for a majority of its revenues; failure to successfully develop, introduce, drive adoption of or monetize new features and products; failure to compete effectively for advertising and marketing spending; failure to develop the small and medium enterprise market by the Company or through cooperation with other parties, including Alibaba; failure to successfully integrate acquired businesses; risks associated with the Company’s investments, including equity pick-up and impairment; failure to compete successfully against new entrants and established industry competitors; changes in the macro-economic environment, including the depreciation of the Renminbi; and adverse changes in economic and political policies of the PRC government and its impact on the Chinese economy. Further information regarding these and other risks is included in Weibo’s annual report on Form 20-F for the fiscal year ended December 31, 2015 filed with the SEC on April 28, 2016 and other filings with the SEC. All information provided in this press release is current as of the date hereof, and Weibo assumes no obligation to update such information, except as required under applicable law.

Contact:

Investor Relations

Weibo Corporation

Phone: +86 10 5898-3017

Email: ir@staff.weibo.com

WEIBO CORPORATION

UNAUDITED CONDENSED CONSOLIDATED STATEMENTS OF OPERATIONS

(In thousands, except per share data)

(a) Stock-based compensation in each category:

WEIBO CORPORATION

UNAUDITED CONDENSED CONSOLIDATED BALANCE SHEETS

(In thousands)

* Commencing on January 1, 2016, in order to enhance comparability with industry peers, payables that have been invoiced or formally agreed with the suppliers were recorded in accounts payable. To conform to current period presentations, the relevant amounts in prior periods have been reclassified from accrued liabilities accordingly. Such reclassification amounted to $37.9 million as of December 31, 2015.

WEIBO CORPORATION

UNAUDITED RECONCILIATION OF NON-GAAP TO GAAP RESULTS

(In thousands, except per share data)

Adjusted EBITDA:

WEIBO CORPORATION

UNAUDITED RECONCILIATION OF NON-GAAP TO GAAP RESULTS

(In thousands, except per share data)

(a)  To exclude stock-based compensation.

(b)  To exclude amortization of intangible assets.

(c)  To exclude net gain on the sale of investments and impairment on investments, and dividend income.

(d)  To exclude loss attributable to non-controlling interests.

(e)  To exclude the provision for income tax related to item (b). Other non-GAAP to GAAP reconciling items have no income tax effect.

Most of the reconciliation items were recorded in entities in tax free jurisdictions hence no income tax implications.

For impairment on investments, full valuation allowances were made as the Company does not expect to realize the benefit in the foreseeable future.

WEIBO CORPORATION

UNAUDITED ADDITIONAL INFORMATION

(In thousands)