Private companies still have boards of directors. It's possible to have a board of directors with only one member but this is a rarity; even non-profits and pre-funding startups will usually have a board with more than one person.
It is actually extremely common for corporations which aren’t regular business as such - for example, trustees of family trusts are commonly corporations with a single director who is the person who ultimately controls the trust. Also a common structure for sole proprietorship businesses that want some protection from legal liability.
I own a company which never has done anything (I was daydreaming). Its board of directors has one member-me. Legally, I am required to hold annual board meetings with myself, although I believe the legal obligation is met if I hold them in my head. “This year’s financial results: zero revenue, zero expenses, zero assets, zero liabilities, zero employees-another great year at does-nothing-corp!”
Otherwise, it’s easier to pierce the veil.
I once worked for a small Corp that the office manager was the board secretary and literally had a meeting with just herself for such a purpose.
I'm guessing what you actually mean is "Also a common structure for one person who does business on their own, who has incorporated, and who is their own sole board member." Is my inference correct?
[https://find-and-update.company-information.service.gov.uk/c...]
Interestingly, they're overdue on their bill with Companies House it looks like. Oops.
Lots of entities in Delaware named Twitter Inc. (3) plus what might be a holding company or two. Hard to tell without more digging.
[https://icis.corp.delaware.gov/eCorp/EntitySearch/NameSearch...]