What Is an Underwriting Agreement? Types, Fees, and Provisions

An underwriting agreement is the contract between a company issuing new securities and the investment bank that sells those securities to the public. It governs initial public offerings and most secondary stock offerings, and it decides three things: who takes the loss if shares don’t sell, how much the bank earns, and what each side legally promises the other. If something goes wrong after the offering closes, this contract is where the lawyers start.

What the Agreement Decides

Three questions sit at the center of every underwriting agreement.

The first is risk. When a company issues stock, someone has to be on the hook if investors don’t buy at the expected price. The agreement names that party. The second is compensation. The bank isn’t working for free, and the contract specifies how it gets paid out of the offering. The third is disclosure and liability. The issuer makes a long list of formal statements about its business and finances, and the agreement determines what happens if any of those statements turns out to be wrong.

Everything else in a typical agreement, including closing conditions, termination rights, and post-offering restrictions on insiders, exists to support those three answers.

Types of Underwriting Commitments

The single most important variable is who absorbs the risk of unsold shares. That question determines the commitment type.

Firm Commitment

The underwriter buys every share from the issuer outright, whether or not it can resell them. The bank acts as a buyer, not a middleman, and any unsold inventory is its own loss.¹ The issuer knows exactly how much capital it will receive at closing. Because the bank takes real inventory risk, firm commitments carry the highest fees, and nearly all large IPOs use this structure.

Best Efforts

The underwriter acts only as an agent. It agrees to try to sell the shares but guarantees no particular result. The issuer might hit its target or fall well short. This structure appears in smaller or more speculative offerings where banks won’t put their own capital at risk.²

All-or-None

A best-efforts deal with a hard minimum. Every share in the offering must be sold by a deadline, or the deal is canceled. Federal rules require that investor money sit in a separate escrow account until the contingency is met, and if the deadline passes without a complete sellout, the escrow agent returns every dollar to investors.³

Mini-Maxi

A middle ground. The agreement sets both a floor and a ceiling on shares sold. If subscriptions don’t reach the floor, the deal is canceled and funds are returned from escrow. Above the floor, the offering proceeds even if the ceiling isn’t hit. A company might offer up to one million shares, for example, but require that at least 750,000 sell before it will close.

How the Underwriter Gets Paid

Compensation comes from the underwriting spread, the difference between what the bank pays the company per share and what it charges the public. If the bank pays the issuer $47 and sells to investors at $50, the $3 gap is its cut. For moderately sized U.S. IPOs, the spread clusters tightly around 7% of the offering price, and larger offerings often negotiate lower spreads because per-share distribution costs fall as volume rises.⁴

Promises Inside the Contract

Representations and Warranties

The issuer makes formal factual statements about itself: that it is legally in good standing, that its financial statements are accurate, and that the registration statement filed with the SEC is complete. In its IPO underwriting agreement, Facebook represented that the registration statement “did not contain any untrue statement of a material fact or omit to state a material fact required to be stated therein or necessary to make the statements therein not misleading.”⁵ If any representation turns out to be false, it opens the door to indemnification claims and investor lawsuits.

Indemnification

The issuer typically agrees to cover the underwriter’s losses from errors in the registration statement and prospectus. The underwriter, in turn, indemnifies the issuer for misstatements traceable to information the underwriter provided. In practice, the issuer’s obligation is far broader because it controls almost all of the disclosure content.

Conditions to Closing

The agreement lists what must happen before money and securities change hands. Standard conditions include a legal opinion from the issuer’s counsel, a “comfort letter” from the issuer’s independent auditors confirming that financial data in the prospectus matches the audited statements, and confirmation that no material litigation has erupted since signing.⁶ Each item gives the underwriter a checkpoint to verify nothing has changed since the deal was priced.

The Bank’s Escape Hatches

Every underwriting agreement gives the bank a way out if conditions deteriorate between signing and closing.

A “market out” clause covers external shocks. Typical triggers include a suspension of trading on the major exchanges, a disruption to securities settlement, a declared banking moratorium, or an outbreak of hostilities or market calamity that makes proceeding impracticable.⁵ The last of these is deliberately broad and gives the underwriter room to walk during events that don’t fit the other categories.

A Material Adverse Change (MAC) clause covers internal shocks. It lets the underwriter terminate if something happens to the issuer’s own business, financial condition, or earnings prospects, such as a restatement of financials or the loss of a major customer.

The Over-Allotment (Green Shoe) Option

Most firm-commitment agreements include a “green shoe” clause, named after the Green Shoe Manufacturing Company. It lets the underwriter sell up to 15% more shares than the original offering size, and it has up to 30 days after the IPO to exercise the option.⁷

The clause serves a price-stabilization purpose. In the first days of trading, the underwriter often oversells the offering by the green shoe amount, creating a short position. If the stock drops below the offering price, the bank buys shares in the open market to cover, which supports the price. If the price holds or rises, the bank exercises the option to get the extra shares from the issuer instead. Stabilization of this kind is permitted under SEC Regulation M, which otherwise restricts market activity during offerings.⁸

Lock-Up Provisions

Alongside the underwriting agreement, the company and its bank negotiate a lock-up that prevents insiders from selling their shares for a set period after the offering. Most lock-ups last 180 days and cover company employees, their family members, and pre-IPO investors such as venture capital firms.⁹

Lock-ups are contractual, not regulatory. No SEC rule requires them. The underwriter insists on them because a sudden flood of insider shares hitting the market right after an IPO could crush the stock price. Delaying that supply gives the new stock time to find its level. When a lock-up expires, the stock often dips as insiders begin to sell, which is why expiration dates get close attention from investors.

Why the Contract Is So Detailed: Section 11 Liability

The heavy focus on representations, investigations, and paper trails makes sense once you know what sits behind the agreement. Section 11 of the Securities Act of 1933 creates personal liability for anyone connected to a flawed registration statement. Investors who bought in the offering can sue if it contained a material misstatement or omitted a material fact, and the list of potential defendants is long: everyone who signed the statement, every director of the issuer at filing, every expert who certified a portion of it, and every underwriter on the deal.¹⁰

Issuers face strict liability. They cannot escape a claim by arguing they didn’t know. Underwriters and other non-issuer defendants can raise a due diligence defense, but only by showing they conducted a reasonable investigation and had reasonable grounds to believe the statement was accurate.¹⁰ The issuer’s disclosures, the underwriter’s investigation, the auditor’s comfort letter, and counsel’s legal opinion all build the paper trail each party will point to if a Section 11 suit arrives. The agreement doesn’t just allocate business risk; it constructs each side’s legal defense.

FINRA Review

The underwriting agreement itself isn’t a private matter between the parties. Before an offering can proceed, the agreement and related documents must be filed with FINRA through its Public Offering System, generally no later than three business days after any submission to the SEC, or at least 15 business days before sales begin if no SEC filing is involved.⁷

FINRA reviews the terms mainly to ensure the underwriter’s compensation is fair. Rule 5110 prohibits arrangements it considers unreasonable, including non-accountable expense allowances above 3% of offering proceeds and over-allotment options larger than 15% of the shares offered. All forms of compensation, including warrants and rights of first refusal on future deals, must be disclosed and valued.⁷ The review acts as a check on the underwriter’s negotiating power, which matters most in smaller offerings where the issuer has less leverage to push back on fees.

1
Nasdaq. Firm Commitment Underwriting
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U.S. Securities and Exchange Commission. ADOMANI, Inc. – Form of Underwriting Agreement
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eCFR. 17 CFR 240.15c2-4 – Transmission or Maintenance of Payments Received in Connection With Underwritings
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U.S. Securities and Exchange Commission. Data Appendix – The Middle-Market IPO Tax
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U.S. Securities and Exchange Commission. Form of Underwriting Agreement – Facebook, Inc.
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Public Company Accounting Oversight Board. AS 6101 – Letters for Underwriters and Certain Other Requesting Parties
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FINRA. Corporate Financing Rule – Underwriting Terms and Arrangements
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eCFR. 17 CFR 242.104 – Stabilizing and Other Activities in Connection With an Offering
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U.S. Securities and Exchange Commission. Initial Public Offerings, Lockup Agreements
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Office of the Law Revision Counsel. 15 USC 77k – Civil Liabilities on Account of False Registration Statement