To have a private offering, there are guidelines indicating who the investors can be, how much money can be raised, and a series of other parameters. Two of the most widely used pieces of legislation companies use to avoid unwanted excessive reporting requirements are Section 4(a)(2) and Rule 506 of Regulation D.

Filing exemptions, SEC Regulation D, Securities Act of 1933

What are the options to do a private offering?

SEC Rule 506(b) of Regulation D - https://www.investor.gov/introduction-investing/investing-basics/glossary/rule-506-regulation-d

Accredited investor - https://www.investopedia.com/terms/a/accreditedinvestor.asp

Private placements - https://www.sec.gov/smallbusiness/exemptofferings/rule506b