Exhibit 99.1 Bilibili Inc. Announces First Quarter 2021 Financial Results SHANGHAI, May 13, 2021 — Bilibili Inc. ("Bilibili" or the "Company") (NASDAQ: BILI and HKEX: 9626), an iconic brand and a leading video community for young generations in China, today announced its unaudited financial results for the first quarter ended March 31, 2021. First Quarter 2021 Highlights: • Total net revenues reached RMB3,901.1 million (US$595.4 million), a 68% increase from the same period in 2020. • Average monthly active ...

Reporting and Compliance - Bilibili Inc. will not prepare or publish an annual report according to the Hong Kong Listing Rules[2] - Shareholders and potential investors can access the annual report submitted to the SEC on March 5, 2021, via the company's website[2] Financial Performance - Financial performance for the year ended December 31, 2020, is available in the prospectus dated March 18, 2021[2]

Table of Contents UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 20-F (Mark One) ☐ REGISTRATION STATEMENT PURSUANT TO SECTION 12(b) OR 12(g) OF THE SECURITIES EXCHANGE ACT OF 1934 OR ☒ ANNUAL REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 For the fiscal year ended December 31, 2020 OR ☐ TRANSITION REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 OR ☐ SHELL COMPANY REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIE ...

Table of Contents Title of Each ClassTrading Symbol(s)Name of Each Exchange On Which Registered American depositary shares, each representing one Class Z ordinary share BILI Nasdaq Global Select Market Class Z ordinary shares, par value US$0.0001 per share* Nasdaq Global Select Market* UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 20-F (Mark One) ☐ REGISTRATION STATEMENT PURSUANT TO SECTION 12(b) OR 12(g) OF THE SECURITIES EXCHANGE ACT OF 1934 OR ☒ ANNUAL REPORT PURSUANT TO SE ...

Table of Contents UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 20-F (Mark One) o REGISTRATION STATEMENT PURSUANT TO SECTION 12(b) OR 12(g) OF THE SECURITIES EXCHANGE ACT OF 1934 OR x ANNUAL REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 For the fiscal year ended December 31, 2018 OR o TRANSITION REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 For the transition period from to OR o SHELL COMPANY REPORT PURSUANT TO SE ...