An IPO lock-up period is a contractual agreement with the underwriters not to sell your shares for a defined stretch after the offering, most commonly 180 days. It is not a securities law requirement. When it expires, the contractual restriction lifts, but securities rules, company trading policies, and blackout windows continue to apply.
Where the restriction comes from
Underwriters require lock-up agreements to prevent a flood of insider supply immediately after pricing, which would undermine the offering. Officers, directors, employees, and existing investors typically sign, and the agreement runs to the underwriters rather than to the company.
Because it is a contract, its terms vary. Read your own agreement rather than relying on what a colleague says, since duration, the definition of covered securities, permitted transfers, and release provisions differ between deals and sometimes between holders in the same deal.
The company’s registration statement describes the lock-up arrangements, and that description is a useful cross-check against what you were asked to sign.
What actually happens on expiration day
The contractual bar lifts, and a large block of previously restricted shares becomes eligible to trade. That is a supply event, and the market generally knows the date well in advance.
What does not change is everything else. If you are an affiliate, volume limits and filing requirements continue to apply, as covered in the article on Rule 144 volume limits stacking on top of a trading plan. If you hold material non-public information, you cannot trade regardless of the calendar.
Nor does the company’s own policy lift. Most issuers impose quarterly blackout windows around earnings that are more restrictive than the law requires, and expiration frequently lands inside one.
Early releases and staggered expirations
Modern lock-ups are less monolithic than the 180-day description suggests. Many include provisions that release a portion of shares early if defined conditions are met, commonly a combination of elapsed time since the offering, the filing of an earnings report, and the stock trading above a threshold relative to the offering price.
Others stagger release across multiple dates, or carve out a percentage for sale during a specified window. Underwriters can also waive the restriction, in whole or in part, at their discretion.
The practical consequence is that your first real opportunity to sell may come earlier than 180 days, and may cover only part of your position. Knowing which applies to you is the difference between a plan and a scramble.
Permitted transfers during the lock-up
- Gifts and estate planning transfers are frequently permitted if the recipient agrees to be bound by the same restrictions.
- Transfers to trusts for family members are commonly carved out on the same condition.
- Adopting a trading plan is often allowed during the lock-up, provided no sales occur under it before expiration and public disclosure of the plan is limited.
- Net settlement of vesting equity awards to cover withholding taxes is usually excluded from the restriction.
These carve-outs matter because they are the only planning moves available while you wait, and several of them are far more valuable before the stock appreciates than after.
What the restriction does to your risk
During the lock-up you hold a concentrated, undiversified, and unsellable position through the most volatile months in a newly public company’s life. That is the actual exposure, and it is worth naming clearly rather than treating the period as a waiting room.
The underlying problem is concentration, and it does not begin or end with the lock-up, as the article on a single stock dominating your net worth sets out.
Hedging is the obvious response and is usually unavailable, because lock-up agreements typically prohibit economically equivalent transactions and company policies frequently ban hedging outright. The specifics are covered in the guide to hedging during the lock-up.
What to do with the waiting period
Use it. The lock-up is the only period in this process where you have time and no ability to act impulsively, which makes it the ideal window for planning.
Determine your exact share counts by type and tax lot, calculate your expected tax liability under several price scenarios, decide what percentage of your net worth you are willing to leave in one stock, and understand your company’s trading windows and pre-clearance requirements.
Then convert that into a written plan for the first twelve months after expiration, which is the substance of the 90-day countdown checklist.
The questions to answer about your own agreement
Four items decide what your lock-up actually means for you, and none of them can be answered from a general description. Find the exact expiration date and how it is measured, whether from pricing, from the prospectus date, or from closing.
Identify which securities are covered. Agreements usually reach beyond shares you already hold to include shares acquired later through option exercises or vesting, and sometimes to securities convertible into or exercisable for common stock.
Locate the early release provisions and read the conditions precisely, since they typically require several things to be true at once rather than any one of them. And find the permitted transfer carve-outs, because those are the only planning actions available to you before the term ends.
The bottom line on lock-up periods
The lock-up is a contract with the underwriters, commonly 180 days, with terms that vary and increasingly include early release triggers. Expiration lifts that contract only; securities rules, blackout windows, and company policies continue. Read your own agreement, find your real first sale date, and use the waiting period to build the plan.
Is the 180-day lock-up required by the SEC?
No. It is a contractual agreement between shareholders and the underwriters. Duration and terms vary by deal, and underwriters can waive or release the restriction early at their discretion.
Can I sell the day the lock-up expires?
Only if no other restriction applies. Company blackout windows, pre-clearance requirements, affiliate volume limits, and possession of material non-public information all continue to apply after the contractual lock-up lifts.
What is an early lock-up release?
A provision that frees some shares before the full term ends, typically when defined conditions are met, such as elapsed time plus an earnings release plus the stock trading above a threshold. Terms differ by deal.
Can I transfer shares to a trust during the lock-up?
Frequently yes, if your agreement permits it and the recipient agrees to be bound by the same restrictions. Check your specific agreement, since permitted transfer provisions are not uniform.
This article is for general educational purposes only and is not tax, legal, or investment advice. Equity-compensation and wealth-planning rules are complex and depend on your specific situation; consult a qualified tax professional or financial advisor before acting.
