UK user asks about SEC registration rules for US companies incorporated in a single state

User wonders if a company incorporated only in Delaware can sell shares without operating in other states. They ask whether the company name must end with a specific suffix like Inc, LLC, or Corp and what the initial SEC filing entails, including whether state formation documents must be submitted.

Why it matters: They also inquire about any asset or investor thresholds that trigger mandatory SEC registration versus an opt‑in approach.