Quiet Period: After filing for an IPO, companies enter a quiet period where they limit publicity to avoid influencing stock prices unfairly.

Dutch Auctions: Google famously used a Dutch auction for its IPO, allowing all investors to bid on the same terms.

Direct Listings: Unlike traditional IPOs, direct listings allow companies to go public without issuing new shares or raising capital.

Lock-Up Period: Insiders and early investors in an IPO are typically restricted from selling their shares for a certain duration post-IPO.

Underwriters’ Greenshoe Option: This provision allows underwriters to buy additional shares from the company at the offering price.

Red Herring Prospectus: A preliminary IPO document that outlines the company's business but lacks key details, like the offer price.

Quiet Filing: Companies can confidentially file for an IPO with the SEC, keeping their plans under wraps until later stages.

IPO Roadshow: Companies conduct roadshows to pitch their stock to potential investors before going public.

SPACs vs. Traditional IPOs: Special Purpose Acquisition Companies (SPACs) offer an alternative route to going public compared to traditional IPOs.

Flipping Shares: Some IPO investors quickly sell their shares for a profit immediately after the stock starts trading publicly.

Regulation A+: This allows smaller companies to raise capital from the public without extensive SEC registration requirements.

IPO Pop: The initial surge in stock price on an IPO day is known as the IPO pop, fueled by investor excitement.

Quiet Period Expiration: After the quiet period ends, analysts from the underwriting banks can publish reports, affecting stock prices.

FOMO & IPOs: Fear of Missing Out (FOMO) often drives investors to rush into buying IPO shares, impacting market demand.

Market Timing: Companies strategically choose when to go public based on market conditions, aiming for optimal investor interest.