# Book Runner: Definition, Duties, Vs. Other Underwriters

![Book Runner: The primary underwriter or lead coordinator in the issuance of new equity, debt, or securities instruments. ](https://www.investopedia.com/thmb/ijMr2gdlqDXVtKvM-kpI4Rj-pbs=/1500x0/filters:no_upscale():max_bytes(150000):strip_icc()/bookrunner.asp-1-FINAL-1-1-1-9a19a48cd3ba4b85bc3ab48822fe6e0a.png)

*— Investopedia / Joules Garcia*

> **Definition**
>
> A book runner is the primary underwriter in investment banking, taking charge of the issuance and pricing of new securities like equity and debt. As a lead manager during these financial operations, the book runner not only coordinates with various firms but also mitigates risks associated with these transactions. Learn more about the integral role of book runners compared to other underwriters in the industry.

## What Is a Book Runner?

A book runner, or bookrunner, is the primary [underwriter](https://www.investopedia.com/terms/u/underwriter.asp) or lead coordinator when an [investment](https://www.investopedia.com/best-stock-trading-apps-4587996) bank issues new equity, debt, or securities instruments.

The book runner is the lead underwriting firm that runs or is in charge of the books in investment banking. Book runners may also coordinate with others in order to mitigate their risk such as those that represent companies in large, [leveraged buyouts](https://www.investopedia.com/terms/l/leveragedbuyout.asp) (LBOs).

### Key Takeaways

*   A book runner is the lead underwriter during the issuance of new equity, debt, or securities.  
    
*   Book runners often form syndicates with other investment banks to reduce their risk and create a sales force for shares.  
    
*   They play a key role in initial public offerings (IPOs) by determining the initial value and quantity of shares to be sold.  
    
*   Book runners can earn a significant commission by assuming the most responsibility during the issuance.  
    
*   In leveraged buyouts, a book runner represents one of the companies and collaborates with others.

## How Book Runners Operate in Investment Banking

Book runners are the lead underwriters involved in different parts of the financial industry including [initial public offerings](https://www.investopedia.com/terms/i/ipo.asp) (IPOs) and LBOs. As such, they're also known in the industry as lead arrangers or lead managers. With IPOs, the book runner assesses a company's financials and current market conditions to arrive at the initial value and quantity of shares to be sold to private parties. While most often done during an IPO, book runners may also do this through a [secondary offering](https://www.investopedia.com/terms/s/secondaryoffering.asp).

To reduce its risk, the book runner syndicates with other underwriting firms for the issuance of the new [equity](https://www.investopedia.com/terms/e/equity.asp), debt, or security. This is fairly common in the investment banking industry and is a temporary arrangement between entities. The book runner serves as lead underwriter, working with other investment banks to establish an [underwriter syndicate](https://www.investopedia.com/terms/u/underwriter-syndicate.asp), thereby creating the initial sales force for the shares. These shares are then sold to institutional and retail clients. These new shares carry a hefty [commission](https://www.investopedia.com/terms/c/commission.asp)—as much as 6% to 8%—for the underwriter syndicate, with the majority of shares held by the lead underwriter.

> **Important**
>
> A book runner often syndicates with other underwriting firms to reduce their risk.

The lead-left book runner, also called managing underwriter or [syndicate](https://www.investopedia.com/terms/s/syndicate.asp) manager, is listed first among the other underwriters participating in the issuance. The lead-left book runner plays the most important role in the [transaction](https://www.investopedia.com/terms/t/transaction.asp) and will typically assign parts of the new issue to other underwriting firms for placement while retaining the most significant portion for themselves. This book runner's name is also the first bank to be listed on the prospectus, in the upper left-hand corner.

Book runners also work with large, leveraged buyouts, which often involve multiple businesses. LBOs take place when a company makes an [acquisition](https://www.investopedia.com/terms/a/acquisition.asp) using [borrowed capital](https://www.investopedia.com/terms/b/borrowed-capital.asp). In these cases, the book runner represents one of the participating companies and coordinates with the other participating firms. One company generally takes the responsibility of running or managing the books, though more than one book runner—also called a joint book runner—can control a security issuance.

## Key Considerations for Book Runners

In [securities](https://www.investopedia.com/terms/s/security.asp), an underwriter usually represents a business entity, often an [investment bank](https://www.investopedia.com/terms/i/investmentbank.asp). The underwriter ensures all documentation and reporting needs are met and works with investors to market the offering and assess interest. An underwriting institution may offer guarantees regarding the amount of stock to be purchased. They may also buy securities to meet the minimum guarantee.

A book runner performs the same duties as an underwriter while also coordinating the efforts of multiple involved parties and information sources. In this regard, the book runner functions as a central point for all information regarding the potential offering or [issue](https://www.investopedia.com/terms/i/issue.asp). This pivotal position may allow the book runner and his associated firm to know new information before it is widely known.

## Essential Responsibilities of a Book Runner 

Setting the final [offering price](https://www.investopedia.com/terms/o/offeringprice.asp) is a major underwriter responsibility. The price impacts the proceeds size for the issuer. It also determines how easily the underwriter can sell the securities.

The issuer and lead book runner usually work together to determine the price. Once they agree on a price for the securities and the [Securities and Exchange Commission](https://www.investopedia.com/terms/s/sec.asp) (SEC) makes the registration statement effective, the underwriters call the subscribers to confirm their orders. If demand is particularly high, the underwriters and the issuer may raise the price and reconfirm the sale with subscribers.

A [book](https://www.investopedia.com/terms/b/book.asp) runner must compile a working list to track parties interested in the new offering. This information helps set an opening price for the IPO and gauges potential [investor](https://www.investopedia.com/terms/i/investor.asp) interest.

Being the lead underwriter for a stock offering, especially an IPO, can bring a large payday if the market shows a high demand for the shares. The stock issuer will often allow the lead underwriter to create an over-allotment of [shares](https://www.investopedia.com/terms/s/shares.asp) if demand is high which can bring in even more money to the underwriting firm. This is called a [greenshoe option](https://www.investopedia.com/terms/g/greenshoe.asp).

There are substantial risks involved in underwriting stock [offerings](https://www.investopedia.com/terms/o/offering.asp). For instance, any company could plummet in the [open market](https://www.investopedia.com/terms/o/open-market.asp) once public trading begins. This is why large investment banks look to conduct many diverse offerings in the course of a year. The more transactions and offerings take place, the more the risk is spread out between them instead of concentrated on the outcomes of a single company's offering.

## What Is a Leveraged Buyout?

A leveraged buyout is when one company buys another using a large amount of borrowed money to fund the purchase. Often, the assets of the company being purchased are used as collateral for the loans taken out by the buyer.

## What Is the Difference Between a Book Runner and a Lead Manager?

A book runner is responsible for the entire underwriting process during the an IPO or a leveraged buyout. A lead manager is responsible for finding buyers for an IPO and ensure there are no barriers to the sale. These roles are often filled by the same firm.

## Do Underwriters Always Work for Investment Banks?

Underwriters are responsible for assessing risk during financial transactions and deciding whether they or the company they work for will assume that risk. Investment banks are one type of company that employs underwriters. Insurers and other financial institutions also employ underwriters. The entire underwriting department of an investment bank can serve as book runner.

## The Bottom Line

The book runner is the lead underwriter in financial transactions, such as IPOs, where they coordinate efforts to issue new equity, debt, or securities. They manage the books and form an underwriter syndicate with other investment banks, which helps distribute initial shares and mitigate risk. While syndication spreads the risk and lowers individual profits, the book runner receives the highest commission for their central role in managing the deal. This pivotal role gives them early access to market information, making them essential to successful financial offerings.