Info Gulp

What Is an Overallotment?


Last Updated:
Info Gulp employs strict editorial principles to provide accurate, clear and actionable information. Learn more about our Editorial Policy.

    Highlights

  • An overallotment allows underwriters to sell up to 15% more shares than planned in an IPO or follow-on offering
  • It is also known as a greenshoe option and can be exercised within 30 days
  • Underwriters use it to raise additional capital when demand is high or to stabilize stock prices
  • In Snap Inc
  • 's 2017 IPO, underwriters exercised the option to issue an extra 30 million shares
Table of Contents

What Is an Overallotment?

Let me explain what an overallotment is—it's an option that underwriters often have, allowing them to sell additional shares when a company issues stock in an initial public offering or a secondary/follow-on offering. You should know that this option lets underwriters issue up to 15% more shares than what was originally planned. They can exercise it within 30 days of the offering, and it doesn't all have to happen on the same day.

People also call this a 'greenshoe option.'

Overallotment Explained

Underwriters might choose to exercise the overallotment option if demand for the shares is strong and they're trading above the offering price. In that case, it helps the issuing company bring in more capital.

Sometimes, the goal is to keep the stock price stable and prevent it from falling below the offering price. If the price does drop, underwriters can buy back some shares cheaper than they sold them, which reduces supply and should push the price up. If the stock goes above the offering price, the overallotment lets them buy back the extra shares at the offering price, avoiding any losses.

Example of an Overallotment

Take Snap Inc. in March 2017—they offered 200 million shares at $17.00 each in their highly anticipated IPO. Right after placing those original shares, the underwriters exercised their overallotment option and released another 30 million shares into the market.

Other articles for you

What Are Articles of Association?
What Are Articles of Association?

Articles of Association are internal documents that outline a company's purpose, operations, and rules for tasks like appointing directors and managing finances.

What Is a Hard Loan?
What Is a Hard Loan?

A hard loan is a foreign loan repaid in a stable hard currency to minimize risks for lenders.

What Is a Financial Asset?
What Is a Financial Asset?

A financial asset is a non-physical, liquid asset deriving value from ownership claims or contractual rights, such as cash, stocks, and bonds.

What Is a With Approved Credit (WAC) Statement?
What Is a With Approved Credit (WAC) Statement?

A With Approved Credit (WAC) statement is a disclaimer in ads that conditions promotional financing offers on the buyer's credit approval to avoid misleading advertising.

What Is a Program Evaluation Review Technique (PERT) Chart?
What Is a Program Evaluation Review Technique (PERT) Chart?

A PERT chart is a graphical tool for mapping project timelines and tasks to manage schedules effectively.

What Is Hedonic Regression?
What Is Hedonic Regression?

Hedonic regression uses statistical models to estimate how various attributes influence the price or demand of a good.

Understanding Make-or-Buy Decisions
Understanding Make-or-Buy Decisions

Make-or-buy decisions help companies choose between producing items in-house or buying from suppliers by evaluating costs and benefits.

What Is Monetary Policy?
What Is Monetary Policy?

Monetary policy involves central bank strategies to manage money supply and achieve economic stability.

Understanding the Break-Even Point
Understanding the Break-Even Point

The break-even point is the sales level where a business's revenue exactly matches its total costs, resulting in no profit or loss.

Understanding Actuarial Science
Understanding Actuarial Science

Actuarial science applies math and statistics to assess and manage financial risks in insurance and finance.

Follow Us

Share



by using this website you agree to our Cookies Policy

Copyright © Info Gulp 2025