# Companies with in-house R&D headquartered in Beijing
Tamtam tracks 118 companies with in-house R&D headquartered in Beijing. This list ranks the 30 largest by number of employees on LinkedIn, led by CHINA STATE CONSTRUCTION (CSCEC), Baidu, Inc. and Xiaomi Technology. Their median headcount is 2,602. Half of them were founded in 2002 or later.
These Beijing-based companies conduct in-house research and development. They represent a mix of large established enterprises and younger technology firms. Key players include CHINA STATE CONSTRUCTION, a major construction and real estate conglomerate; Baidu, Inc., a leading AI company; Xiaomi Technology, known for smartphones and smart hardware; and the Chinese Academy of Sciences, a national scientific institution.
The data shows a strong concentration in software development and information technology, with several companies founded in the 2000s and 2010s, such as Baidu (2000), Xiaomi Technology (2010), and Kuaishou Technology (2011). There is also a notable presence of large institutions in research and education, like Tsinghua University and Beijing Institute of Technology.
π¨π³ Beijing Β· 30 companies Β· Updated Nov 11, 2026
| # | Company | Industry | Headquarters | Employees | Founded |
|---|---|---|---|---|---|
| 1 | [CHINA STATE CONSTRUCTION (CSCEC)](https://www.tamtam.ai/c/china-state-construction-cscec-beijing) (cscec.com.cn)
A leading construction and real estate conglomerate in China, specializing in housing construction, international contracting, infrastructure development, and real estate investment | Architecture and Planning | π¨π³ Beijing | 37,581 | |
| 2 | [Baidu, Inc.](https://www.tamtam.ai/c/baidu-inc) (baidu.com)
Leading AI company with comprehensive AI stack, diverse products, and services, serving millions of users, developers, and enterprises worldwide. | Software Development | π¨π³ Beijing | 26,390 | 2000 |
| 3 | [Xiaomi Technology](https://www.tamtam.ai/c/xiaomi-technology) (mi.com)
Designs and manufactures smartphones and smart hardware connected through a leading AIoT platform, serving users globally with innovative technology. | Software Development | π¨π³ Beijing | 25,411 | 2010 |
| 4 | [Chinese Academy of Sciences](https://www.tamtam.ai/c/chinese-academy-of-sciences) (english.cas.cn)
Leading national scientific institution in China, specializing in natural sciences, high technology development, research institutes, academic divisions, higher education, and national strategic research | Research Services | π¨π³ Beijing | 15,069 | |
| 5 | [Tsinghua University](https://www.tamtam.ai/c/tsinghua-university) (tsinghua.edu.cn)
A prestigious university in Beijing, China, Tsinghua University is dedicated to academic excellence, societal well-being, and global development | Higher Education | π¨π³ Beijing | 12,672 | 1911 |
| 6 | [BOE Technology Group Co., Ltd.](https://www.tamtam.ai/c/boe-technology-group-co-ltd) (boe.com)
Provides intelligent interface products and services for information interaction and human health, focusing on semiconductor display, IoT innovation, sensors, MLED, and smart engineering medicine. | Appliances, Electrical, and Electronics Manufacturing | π¨π³ Beijing | 7,559 | 1993 |
| 7 | [Xiaomi International](https://www.tamtam.ai/c/xiaomi-international) (mi.com)
Innovative tech firm creating high-quality hardware, software, and internet services with input from fans worldwide, focused on user-centric innovation | Technology, Information and Internet | π¨π³ Beijing | 7,286 | 2010 |
| 8 | [SANY Group](https://www.tamtam.ai/c/sany-group) (sanyglobal.com)
A global company founded in 1989, specializing in manufacturing machinery for various industries, with a strong presence in over 180 countries worldwide | Machinery Manufacturing | π¨π³ Beijing | 6,983 | |
| 9 | [Kuaishou Technology](https://www.tamtam.ai/c/kuaishou-technology) (kuaishou.com)
A technology company developing content sharing platforms, with a focus on fast and easy content production, distribution, and consumption globally | Software Development | π¨π³ Beijing | 6,231 | 2011 |
| 10 | [H3C](https://www.tamtam.ai/c/h3c) (h3c.com)
A global leader offering comprehensive digital solutions including cloud computing, big data, interconnectivity, security, and IT consultation services | Technology, Information and Internet | π¨π³ Beijing | 4,309 | |
| 11 | [yonyou Network Technology](https://www.tamtam.ai/c/yonyou-network-technology) (yonyou.com)
A leading provider of management software solutions and e-business services, driving commercial and social progress through IT since 1988 | Software Development | π¨π³ Beijing | 3,990 | |
| 12 | [δΈε»ΊδΊε±](https://www.tamtam.ai/c/company-12920146) (cscec2b.com.cn)
A major Chinese construction and engineering organization with expertise in a wide range of projects, including buildings, infrastructure, and international construction ventures | Construction | π¨π³ Beijing | 3,566 | 1952 |
| 13 | [Beijing Institute of Technology](https://www.tamtam.ai/c/beijing-institute-of-technology) (bit.edu.cn)
A top research-oriented university in China focused on science and technology, receiving national awards and high research funds annually | Research Services | π¨π³ Beijing | 3,047 | 1940 |
| 14 | [IBM](https://www.tamtam.ai/c/ibm-beijing) (ibm.com)
Leading technology and consulting employer focused on Hybrid Cloud, AI, and solving real-world problems through innovation and industry-based solutions in HealthTech | Software Development | π¨π³ Beijing | 2,688 | |
| 15 | [Perfect World Co., Ltd.](https://www.tamtam.ai/c/perfect-world-co-ltd) (wanmei.com)
An online game company founded in 2004, with headquarters in Beijing Develops, operates, and markets games globally, reaching over 100 countries | Computer Games | π¨π³ Beijing | 2,602 | |
| 16 | [Ruijie Networks](https://www.tamtam.ai/c/ruijie-networks) (ruijie.com)
A global network solutions provider focusing on innovation to enhance customer network experiences, serving telecom carriers, financial services, government agencies, and enterprises worldwide | Technology, Information and Internet | π¨π³ Beijing | 2,495 | |
| 17 | [η²ιͺ¨ζ(δΈε½)θ½―δ»Άη³»η»ζιε
¬εΈ](https://www.tamtam.ai/c/company-31698526) (oracle.com)
A computer software company based in China specialized in developing software systems | Software Development | π¨π³ Beijing | 2,413 | |
| 18 | [Pharmaron](https://www.tamtam.ai/c/pharmaron) (pharmaron.com)
Premier service provider for life sciences industry offering comprehensive research, development, and manufacturing services across multiple therapeutic modalities globally | Pharmaceutical Manufacturing | π¨π³ Beijing | 2,134 | 2004 |
| 19 | [State Grid Corporation of China](https://www.tamtam.ai/c/state-grid-corporation-of-china-beijing) (sgcc.com.cn)
An internet company based in Beijing, China that is focused on providing online services and solutions to users | Technology, Information and Internet | π¨π³ Beijing | 2,121 | 2002 |
| 20 | [China Energy Engineering Group Co. Ltd.](https://www.tamtam.ai/c/china-energy-engineering-group-co-ltd) (ceec.net.cn)
A leading global solutions provider in the power industry, offering comprehensive services from survey and design to project management | Oil and Gas | π¨π³ Beijing | 1,989 | 2014 |
| 21 | [China Railway Group Limited](https://www.tamtam.ai/c/china-railway-group-limited) (crec.cn)
Civil engineering company specializing in infrastructure construction, project management, and engineering services based in Beijing, China. | Civil Engineering | π¨π³ Beijing | 1,902 | |
| 22 | [Li Auto](https://www.tamtam.ai/c/li-auto) (liauto.com)
A leading Chinese new energy vehicle company that designs, manufactures, and sells premium smart electric vehicles, surpassing sales targets | Motor Vehicle Manufacturing | π¨π³ Beijing | 1,842 | 2015 |
| 23 | [Cheetah Mobile](https://www.tamtam.ai/c/cheetah-mobile) (cmcm.com)
A global technology company specializing in internet products, AI-driven robotic solutions, and service robots, focused on enhancing digital transformations | Technology, Information and Internet | π¨π³ Beijing | 1,836 | 2010 |
| 24 | [Kingsoft Office](https://www.tamtam.ai/c/kingsoft-office) (wps.com)
A global developer of office software solutions with over 25 years of experience, providing productivity applications for consumers and enterprises worldwide | Software Development | π¨π³ Beijing | 1,821 | 1988 |
| 25 | [Yuanfudao](https://www.tamtam.ai/c/yuanfudao) (yuanfudao.com)
Leader in China's online education sector, offering diverse services like online tutoring and smart learning through various education products and technologies since 2012 | Technology, Information and Internet | π¨π³ Beijing | 1,789 | |
| 26 | [BMW China](https://www.tamtam.ai/c/bmw-china) (bmw.com.cn)
Global leader in automobile and motorcycle manufacturing, setting high standards for premium individual mobility with worldwide reputation and innovative technologies | Motor Vehicle Manufacturing | π¨π³ Beijing | 1,751 | |
| 27 | [δΈε½δΈθ½¦](https://www.tamtam.ai/c/company-29383777) (crrcgc.cc)
Leading rail transit equipment supplier with diverse products and top-tier technology from the merger of CNR and CSR | Railroad Equipment Manufacturing | π¨π³ Beijing | 1,685 | |
| 28 | [δΈδΈιε·₯θ‘δ»½ζιε
¬εΈ](https://www.tamtam.ai/c/company-30411069) (sanyhi.com)
This company is a machinery company based in Beijing, China, specializing in heavy equipment manufacturing and construction machinery | Machinery Manufacturing | π¨π³ Beijing | 1,642 | |
| 29 | [Foton Motor](https://www.tamtam.ai/c/foton-motor) (foton-global.com)
A global commercial automotive company with a wide range of vehicles and machinery, partnerships with major brands, and a strong international presence | Motor Vehicle Manufacturing | π¨π³ Beijing | 1,620 | 1996 |
| 30 | [StarTimes](https://www.tamtam.ai/c/startimes) (startimes.com.cn)
A Chinese media group leading digital TV operations in Africa, providing technology, network, and content services to millions of subscribers | Broadcast Media Production and Distribution | π¨π³ Beijing | 1,600 | 1988 |
## How this list is built
Every company on this list has a Tamtam company profile. The industry is the one the company gives on LinkedIn; categories such as SaaS or fintech are classified by Tamtam's AI from the company's website and LinkedIn page; and the headquarters city must match the company's own address. Companies are ranked by the number of employees on LinkedIn, and the list is refreshed every night. Classifications can be wrong, so treat the list as a starting point rather than an official ranking. Last updated Nov 11, 2026.
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- [Corporate groups and holding companies in Beijing](https://www.tamtam.ai/l/holding-companies-beijing) (86)
- [Companies with a mobile app in Beijing](https://www.tamtam.ai/l/companies-with-mobile-app-beijing) (82)
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- [Manufacturers in Beijing](https://www.tamtam.ai/l/manufacturers-beijing) (67)
- [Hardware manufacturers in Beijing](https://www.tamtam.ai/l/hardware-companies-beijing) (61)
- [Critical infrastructure operators in Beijing](https://www.tamtam.ai/l/critical-infrastructure-operators-beijing) (57)
- [Education providers in Beijing](https://www.tamtam.ai/l/education-companies-beijing) (53)
- [Financial Services companies in Beijing](https://www.tamtam.ai/l/financial-services-companies-beijing) (50)
- [AI companies in Beijing](https://www.tamtam.ai/l/ai-companies-beijing) (47)
- [Retail chains in Beijing](https://www.tamtam.ai/l/retail-chains-beijing) (45)
- [Professional services firms in Beijing](https://www.tamtam.ai/l/professional-services-firms-beijing) (44)
- [IT Services and IT Consulting companies in Beijing](https://www.tamtam.ai/l/it-services-and-it-consulting-companies-beijing) (42)
- [Software Development companies in Beijing](https://www.tamtam.ai/l/software-development-companies-beijing) (36)
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- [Media companies and publishers in Beijing](https://www.tamtam.ai/l/media-companies-beijing) (31)
- [Energy companies in Beijing](https://www.tamtam.ai/l/energy-companies-beijing) (30)
- [Research institutes in Beijing](https://www.tamtam.ai/l/research-institutes-beijing) (27)
## The same list elsewhere in China
- [Companies with in-house R&D in China](https://www.tamtam.ai/l/r-and-d-companies-china) (981)
- [Companies with in-house R&D in Guangdong](https://www.tamtam.ai/l/r-and-d-companies-guangdong) (211)
- [Companies with in-house R&D in Jiangsu](https://www.tamtam.ai/l/r-and-d-companies-jiangsu) (95)
- [Companies with in-house R&D in Zhejiang](https://www.tamtam.ai/l/r-and-d-companies-zhejiang) (86)
- [Companies with in-house R&D in Shandong](https://www.tamtam.ai/l/r-and-d-companies-shandong) (51)
- [Companies with in-house R&D in Fujian](https://www.tamtam.ai/l/r-and-d-companies-fujian) (29)
- [Companies with in-house R&D in Shanghai](https://www.tamtam.ai/l/r-and-d-companies-shanghai) (119)
- [Companies with in-house R&D in Shenzhen](https://www.tamtam.ai/l/r-and-d-companies-shenzhen) (113)
- [Companies with in-house R&D in Hangzhou](https://www.tamtam.ai/l/r-and-d-companies-hangzhou) (45)
- [Companies with in-house R&D in Guangzhou](https://www.tamtam.ai/l/r-and-d-companies-guangzhou) (44)
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Source: https://www.tamtam.ai/l/r-and-d-companies-beijing