About Longmen
Longmen is a venture capital firm founded in 2017. It is primarily based out of Zhuhai, China. As of Dec 2020, Longmen has invested in 8 companies. It primarily invests in Series D round in United States based startups. Its investments are spread across a wide range of sectors from High Tech to Blockchain Technology and Life Sciences. Most recently it participated in the $***** Series D round of huiweikang.com Overall, Longmen portfolio has seen 2 IPOs, namely Bitcoin and Sirnaomics. A lot of funds co-invest with Longmen, with names like Rotating Boulder Fund sharing a substantial percentage of its portfolio. Longmen has team of 1 people including 1 partners.Key Metrics
Team Members
Portfolio Count
Portfolio Sectors
Portfolio Locations
Rounds of Entry
Series D
Portfolio IPOs
Longmen's List of Top Investments
Longmen has a portfolio of 8 companies. Their most notable investmentis in huiweikang.comTheir portfolio spans across United States, Canada, China and 1 more locations. They have invested in High Tech, Blockchain Technology, Life Sciences and 6 other sectors, across stages such as Series D stage. Here is the list of top investments by Longmen:1. Bitcoin
Decentralized P2P cryptocurrency for payments. It is based on the Bitcoin Blockchain. It enables users to send, receive, and make payments using digital currencies. It allows transfers through wallets, exchanges, events, and more.
Key facts about Bitcoin
- Founded Year: 2009
- Location: Las Vegas (United States)
- Stage: Public
- Total Funding till date: $100M
- Employee Count: 50 - 199 as on Mar 01, 2026
- Investors: 2020 Ventures, World Capital Holdings Group and 78 Others
- Latest Funding Round: Post IPO, Oct 21, 2021, $*****
- Highlight: Public
2. Sirnaomics
Developer of RNA-based therapeutics for the treatment of cancer and fibrosis disease. The company has proprietary delivery technologies, a polypeptide nanoparticle RNAi platform and GalNAc RNAi platform, GalAhead, to develop drug candidate pipeline which include STP122G for cardiovascular disease treatment. It also, develops pipeline of drugs for cancers, skin conditions, fibrosis-related diseases, antiviral and cardiometabolic diseases, and medical aesthetics.
Key facts about Sirnaomics
- Founded Year: 2007
- Location: Gaithersburg (United States)
- Stage: Public
- Total Funding till date: $267M
- Employee Count: 88 as on Dec 31, 2022
- Investors: Rotating Boulder Fund, RiverHead Capital and 16 Others
- Latest Funding Round: Post IPO, Sep 07, 2025, $*****
- Highlight: Public
3. Mixin
Decentralized P2P transaction network. Allows the users to send and receive cryptocurrency. Also offers messaging features and a cryptocurrency wallet. The platform supports Bitcoin, Bitcoin Cash, Litecoin, Ethereum, Ethreum Classic, Ripple, and Sia. App is available for the iOS and Android platforms.
Key facts about Mixin
- Founded Year: 2013
- Location: Brighton (United Kingdom)
- Stage: Funding Raised
- Employee Count: 8 as on Aug 31, 2026
- Investors: Blockchain R&I, Longmen and 1 Other
Privacy-protecting digital currency enabling private peer-to-peer electronic cash transactions. It is a cryptocurrency focused on providing enhanced privacy through zero-knowledge encryption. The platform aims to offer accessible and open financial tools, allowing users to conduct transactions with control and confidentiality. It supports a decentralized ecosystem with wallets, exchanges, and developer tools. The network facilitates fast, low-fee transactions and enables sending secret messages. The project is community-driven, encouraging participation through building, learning, and discussion. It emphasizes self-funded development and offers resources for understanding and utilizing the protocol. The technology is designed for private everyday payments and long-term savings, promoting financial privacy in the digital age.
Key facts about Zcash Electric Coin Company
- Founded Year: 2016
- Location: Boulder (United States)
- Stage: Seed
- Employee Count: 6 as on Dec 31, 2022
- Investors: 27th Street Capital, Boost VC and 19 Others
- Latest Funding Round: Seed, May 14, 2018, $*****
- Highlight: Editors' Pick
5. EOS
EOS is an open-source blockchain protocol network. It provides enterprise-grade blockchain platform to develop decentralized applications. It provides an operating system for the decentralized application, smart contract platform, and cryptocurrency. It supports both private and public blockchain applications.
Key facts about EOS
- Founded Year: 2017
- Location: Hong Kong (China)
- Stage: Funding Raised
- Employee Count: 51 - 200 as on Jul 01, 2024
- Investors: All Blue Capital, Fundamental Labs and 34 Others
- Latest Funding Round: ICO, Jun 11, 2018, $*****
- Highlight: Editors' Pick
Longmen's Year-on-Year Investment Trends
Its most recent first time investment was in huiweikang.com.Longmen's Investments by Stage
Longmen has made 2 investments in Series D stage with an average round size of $85.4M.Longmen's Investments by Sector
Longmen has a diverse portfolio, with companies operating in the Consumer, High Tech, Life Sciences and Retail. Notably, it has invested in 7 Tech companies, 5 Blockchain companies, 5 Consumer (B2C) companies and at least 4 companies focusing on Enterprise (B2B).Sector | No. of Investments |
|---|---|
Consumer | 1 |
High Tech | 1 |
Life Sciences | 1 |
Retail | 1 |
Note: We have considered here, only first round of investments
Longmen's Investments by Geography
Longmen has made most investments in United States (1).Longmen's recent investments
Longmen has not made any investment in 2026 so far.Here are the most recent investments by Longmen:
Filter this listDate | Company | Location | Round Details | Round Amount | Co-Investors |
|---|---|---|---|---|---|
Dec 17, 2020 | - | Series D | 6206 | ||
Oct 22, 2020 | United States | Series D | 7574 |
IPOs and Publicly Listed companies in Longmen's Portfolio
2 of Longmen's portfolio companies have become public. Sirnaomics got listed on the Hong Kong Exchanges (HKG), in Dec 2021 at marketcap of $821M and Bitcoin got listed on the Toronto Stock Exchange (TSX).Here are Longmen's portfolio companies that went public:
Company | IPO Date | First Invested on | First Round of Investment | Round Size |
|---|---|---|---|---|
Dec 30, 2021 | Oct 22, 2020 | Series D | 1469 | |
Feb 18, 2021 | - | - | 7484 |
Team profile of Longmen
Longmen has a team of 1 member located in China. Longmen's team does not sit on the board of any company as of now.Co-investors of Longmen
Over the past 6 years, 18 investors have co-invested in Longmen's portfolio companies. This includes only funds.
- Invested before Longmen: Maryland, Rich Yield Capital and 6 others have invested in rounds before Longmen. There is 1 company where Maryland has invested before Longmen and 1 company where Rich Yield Capital has invested before Longmen.
- Top Co-investors of Longmen: 9 investors entered a company along with Longmen. These include investors like Rotating Boulder Fund (1 company).
- Invested after Longmen: Bloomage Biotechnology (1 company) is the only investor which has invested in Longmen's portfolio after their investments.
Recent News related to Longmen
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The Leading Gene completed the A round of financing, led by Huakong FundOriginalPEdaily•Apr 11, 2021•Tsinghua Holdings Capital, Genechem, Longmen, Inno Angel Fund
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Hodder Biotechnology received tens of millions of yuan in A+ round of financingPEdaily•Dec 09, 2020•Longmen
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Chinese investors pour $105m into US biopharma firm Sirnaomics’s Series DDeal Street Asia•Oct 22, 2020•Sirnaomics, Rotating Boulder Fund, Walvax, RiverHead Capital and 6 others
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Dingdang Kuaiyao obtains 1 billion yuan in B+ round of financing, and old shareholders such as SoftBank China jointly invest36Kr•Oct 20, 2020•Jingle fast medicine, Taikang Insurance Group, Haier, Longmen and 13 others
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Tencent invests in Chinese healthtech firm Shanghai Kyee TechnologyInternational Finance•Sep 17, 2020•Tencent, Zhenghai Capital, Deyi Capital, Longmen Capital and 3 others
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Chinese Pharma Co. Raises $90M For Respiratory TherapiesLaw360•Jan 02, 2020•CF PharmTech, New Alliance Capital, Langmafeng Venture Capital, China Resources and 13 others
