I-Mab Announces Upcoming Participation at October Conferences

SHANGHAI and GAITHERSBURG,Md.,Oct. 1,2021 --I-Mab (the "Company") (Nasdaq: IMAB),a clinical stage biopharmaceutical company committed to the discovery,development and commercialization of novel biologics,today announced its participation in the following conferences in October. Details of the conferences are as follows:

J.P. Morgan Global Healthcare Conference

One-on-one and small group meetings: October 12-13,2021

Location: Ritz-Carlton Hotel,Shanghai

Management participants: Dr. Jingwu Zang,Founder,Chairman and Director,Dr. Joan Huaqiong Shen,Director and Chief Executive Officer,Mr. Jielun Zhu,Director and Chief Financial Officer,Mr. Tianyi Zhang,Executive Director Investor Relations,Mr. Tyler Ehler,Senior Director Investor Relations and Phoebe Peng,Associate Director Investor Relations

For more information,please contact your J.P. Morgan representative.

Jefferies China Biotech Summit (Virtual)

One-on-one and small group meetings: October 26,2021

Management participants: Dr. Jingwu Zang,please contact your Jefferies representative.

About I-Mab

I-Mab (Nasdaq: IMAB) is an innovation-driven global biotech company focusing on discovery,development and soon commercialization of novel and highly differentiated biologics in immuno-oncology therapeutic area. The Company's mission is to bring transformational medicines to patients around the world through drug innovation. I-Mab's globally competitive pipeline of more than 15 clinical and pre-clinical stage drug candidates is driven by its internal R&D capability and global licensing partnerships,based on the Company's unique Fast-to-Proof-of-Concept and Fast-to-Market pipeline development strategies. The Company is now rapidly progressing from a clinical stage biotech company to a fully integrated global biopharmaceutical company with cutting-edge global R&D capabilities,a world-class GMP manufacturing facility and commercialization capability. I-Mab has established its global footprint in Shanghai (headquarters),Beijing,Hangzhou,Guangzhou,Lishui and Hong Kong in China,and Maryland and San Diego in the United States. For more information,please visithttp://ir.i-mabbiopharma.comand follow I-Mab onLinkedIn,TwitterandWeChat.

For more information,please contact:

I-Mab

Jielun Zhu,Chief Financial Officer

E-mail: jielun.zhu@i-mabbiopharma.com

Office line: +86 21 6057 8000

Gigi Feng,Chief Communications Officer

E-mail: gigi.feng@i-mabbiopharma.com

Office line: +86 21 6057 5709

Investor Inquiries:

The Piacente Group,Inc.

Emilie Wu

E-mail: emilie@thepiacentegroup.com

Office line: + 86 21 6039 8363

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