No. Derivative status is for the investor's spouse and unmarried children under twenty-one. The donors gain nothing from having funded the investment.
Funding the case does not join the case
This is a common and expensive misunderstanding. The immigrant investor petition covers the investor and, as derivatives, a spouse and unmarried children under twenty-one at the relevant time, with the Child Status Protection Act affecting how a child's age is calculated during processing. Parents are not derivatives at any age or contribution level. If they eventually want to live in the United States too, their routes are separate: their own investment, their own qualification under another immigrant category, or, once their daughter is a citizen rather than merely a resident, a family petition available only to citizens for parents. That last route has a long lead time, because naturalisation follows years of permanent residence. Families should map those timelines before deciding whose name the investment goes in.
Hypothetical example: a restaurant-group owner invests while her son is twenty years and ten months old and plans to finish school before moving. A first review produces an age calendar, the son's civil records and the intended immigration sequence. The petition filing date and processing time can affect the statutory age calculation, so the family should obtain specific advice before treating a later move as harmless. If he cannot remain a derivative, he needs an independent basis to immigrate or study. The investment cannot simply be amended later to add an adult child as though age did not matter.