Jīngguò jǐ lún róngzī, chuàngshǐrén de chígǔ bǐlì jiàngdào le bǎi fēn zhī shí yǐxià.
After several rounds of funding, the founder's stake has fallen below 10%.
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usage
A business-news word: 持股比例, the share of a company someone holds, and 员工持股计划, an employee share-ownership plan. Holding enough to control the company is 控股.