IPO Lockup Expiration: What Executives Need to Know Before the Clock Runs Out

The day your company went public, you gained equity on paper — and lost the ability to sell any of it for the next six months. The lockup expiration date felt distant. Now it's approaching, and the assumption that lockup end equals freedom to sell turns out to be incorrect for most executive officers.

Between Rule 144 volume limits, company-imposed blackout windows, and the SEC's 10b5-1 cooling-off period (which must run before your first trade), many executives find that the window of actual optionality at lockup expiration is far shorter than expected — and the tax consequences of acting quickly versus deliberately can differ by hundreds of thousands of dollars.

This guide covers what the lockup period is, what restrictions remain after it ends, how to set up a 10b5-1 plan correctly, and how to think about the tax math for your first post-lockup sales.

What the IPO lockup period is — and what it isn't

A lockup agreement is a contractual commitment — between the company, its executives and major shareholders, and the underwriting banks — prohibiting covered shareholders from selling shares for a specified period after the IPO. The SEC does not require lockups; they are deal terms negotiated by underwriters to stabilize the stock price after listing.¹

The standard IPO lockup for executive officers is 180 days from the IPO date, though the exact term is in your lockup agreement and may vary. The agreement covers you as an individual and typically applies to all shares and options you hold at IPO, including restricted stock that predates the offering.

What the lockup does not do: It does not address the SEC trading rules that apply to you because you're an affiliate of a public company. Those rules remain in effect after lockup expires.

What you still can't freely do after lockup expires

Rule 144: affiliate volume limits and Form 144 filings

As an executive officer, you are an "affiliate" of a public company under SEC rules. Rule 144 provides the safe harbor for affiliates to sell restricted or control securities, but it imposes conditions that don't go away at lockup expiration.²

The key affiliate restrictions under Rule 144:

• Volume limitation: You may sell no more than the greater of (1) 1% of the company's outstanding shares of that class, or (2) the average weekly trading volume during the four calendar weeks preceding the sale — in any 3-month period
• Manner of sale: Shares must be sold in brokers' transactions, directly with market makers, or in riskless principal transactions
• Current public information: The company must be current in its Exchange Act reporting (SEC filings)
• Form 144 filing: If you plan to sell more than 5,000 shares or receive proceeds over $50,000 in any 3-month period, you must file a Form 144 with the SEC concurrently with the sale order²

Company-imposed blackout periods

Nearly all public companies adopt insider trading policies that prohibit trades during "blackout periods" — typically the 30 days before each quarter's earnings release and for 2 business days after. For a company reporting quarterly, this creates four ~6-week blackout windows per year, leaving only four brief open windows when even unrestricted trading is permitted.

The practical effect: lockup expiration that falls during a blackout period means you cannot sell a single share until the open window that follows. Executives whose lockup expires in early January (Q4 earnings season) or early April (Q1 earnings season) may face an additional 4–8 week wait after the 180-day lockup ends.

10b5-1 plans: the timing problem executives underestimate

For executive officers, the only practical mechanism for selling meaningful quantities of stock without incurring insider trading exposure is a Rule 10b5-1 trading plan — a pre-scheduled arrangement that gives an affirmative defense against insider trading claims because trades are determined in advance, when you are not in possession of material nonpublic information (MNPI).

The 2023 SEC amendments to Rule 10b5-1 introduced a mandatory cooling-off period for officers and directors: after you adopt or modify a 10b5-1 plan, you must wait the later of (1) 90 days, or (2) two business days following the public disclosure of financial results for the fiscal quarter in which the plan was adopted — before any trades can execute. This period is capped at 120 days.³

Additional requirements under the 2023 amendments: at plan adoption, you must certify in writing that (1) you are not aware of any MNPI about the company or its securities, and (2) you are adopting the plan in good faith and not as part of a scheme to evade Rule 10b-5. The plan document must include this certification.³

Single-trade plans — used to sell a specific quantity of shares on a specific date — are limited to one per 12-month period under the 2023 amendments. Volume-based or time-scheduled plans remain available without this restriction.

Tax planning for your first post-lockup sales

Holding periods: what's long-term and what isn't

The tax rate on your post-lockup sales depends entirely on how long you've held the shares. For most executive officers, the answer differs by instrument:

• RSUs: Your holding period starts on the vest date (when shares were delivered and ordinary income tax was withheld). RSUs that vested more than 12 months before your first post-lockup sale are already long-term. RSUs that vested in the 6 months before or during the lockup period may still be short-term at lockup expiration.
• Stock options exercised before or at IPO: Your holding period starts on the exercise date. Pre-IPO exercises may already be long-term. Options exercised at or near IPO — even with a 180-day lockup — will likely be short-term at lockup expiration.
• Founder shares / pre-IPO restricted stock: Holding period starts at acquisition or vesting. If you received founder shares years ago, these are almost certainly long-term, and may qualify for QSBS treatment (see below).

2026 long-term capital gains rates

For 2026, the federal long-term capital gains (LTCG) tax rates and thresholds are:⁴

The Net Investment Income Tax (NIIT) adds 3.8% on top of LTCG for single filers with MAGI above $200,000 and MFJ filers above $250,000. These NIIT thresholds are statutory and not inflation-adjusted.⁵ An executive officer selling appreciated stock at a meaningful gain will typically owe 23.8% federal LTCG + NIIT (20% + 3.8%) plus applicable state tax.

Short-term gains are taxed as ordinary income — 37% federal for executives in the top bracket, plus NIIT plus state tax. The difference between 23.8% and ~45%+ on a $5M sale is more than $1M. Holding for long-term treatment where possible is worth significant coordination.

QSBS: Is your pre-IPO stock eligible for the Section 1202 exclusion?

If you received stock in the company before it grew substantially and the company was a "qualified small business" at issuance, a portion of your gain may be excludable under IRC § 1202 — the QSBS exclusion. Under the One Big Beautiful Bill Act (OBBBA, July 2025), the exclusion was permanently increased to $15 million (up from the old $10M cap), with tiered exclusion rates based on holding period: 50% exclusion at 3 years, 75% at 4 years, and 100% at 5 or more years.⁶

QSBS eligibility requires:

• The company was a domestic C corporation at issuance (not an S corp, LLC, or partnership)
• The company's aggregate gross assets did not exceed $50 million at the time the stock was issued
• The stock was acquired as an original issuance (from the company, not a secondary purchase) in exchange for money, property, or services
• You have held the stock for more than 5 years for the 100% exclusion (3+ years for partial exclusion)
• The company is in a qualifying trade or business (broadly including technology, manufacturing, and most non-professional service businesses)

For executives with pre-IPO stock in a company that was small at issuance, QSBS analysis is worth doing carefully before any sale. Even a partial exclusion can eliminate millions in federal capital gains tax.

Concentrated stock: the case against selling everything at once

The end of the lockup period creates psychological pressure to diversify — to finally convert paper wealth into real wealth. But selling your entire position at lockup expiration has three costs that are often underestimated:

1. Tax rate: Mixing long-term and short-term positions by selling everything creates a blended effective rate. Separating sales by holding period can reduce the average rate materially.
2. Timing concentration: Selling a large block on a single date into post-lockup supply (when all insiders are also selling) typically occurs at lower prices. Rule 144's volume caps exist partly for this reason.
3. Optionality loss: If the company continues to appreciate post-IPO, a gradual sell-down captures more upside while reducing risk. If it declines, you've at least diversified the portion already sold.

A structured 10b5-1 plan spread over 12–24 months — selling a fixed number of shares per open window — accomplishes most diversification goals while staying within Rule 144 volume limits, avoiding blackout periods automatically, and smoothing tax concentration across years.

NQDC at a newly public company

If you had a non-qualified deferred compensation (NQDC) arrangement that was in place before the IPO, the IPO itself is not a Section 409A distribution trigger. Your elections and distribution schedule continue unchanged. However, if your NQDC was denominated in company stock or had a stock-settled payout, the plan document should be reviewed post-IPO to confirm the settlement mechanics work correctly for a public company and that the plan has not inadvertently triggered a 409A violation in the IPO structure.

See the full NQDC distribution framework at NQDC Planning: Elections, Triggers & 409A Rules.

Common mistakes executives make at lockup expiration

• Waiting until the lockup expires to think about a 10b5-1 plan. By then, you're in a blackout period or the next earnings cycle is imminent, and you can't adopt a plan in time for the first open window post-lockup. Plan adoption needs to happen 4–5 months before lockup expiration.
• Selling short-term shares and holding long-term shares. This is backward — short-term shares will season into LTCG if held past their one-year mark; long-term shares are already tax-efficient. Identify which lot is which and sell in the right order.
• Ignoring QSBS analysis. Most executives are unaware whether their pre-IPO shares qualify, and the question is complex enough that many advisors miss it. At $15M of potential federal exclusion, it's worth a dedicated analysis.
• Treating Rule 144 as optional. Sales that exceed the volume limit or are made without required Form 144 filings are violations, not technicalities. The SEC does pursue affiliate trading violations.
• Taking distributions from NQDC in the same year as large equity sales. NQDC distributions are ordinary income. If you also have a large short-term gain from stock sales, the combined income may push you into higher brackets and increase IRMAA Medicare surcharges. Year-to-year sequencing matters.

1. Cooley LLP, IPO Go — "Shares Eligible for Future Sale: Lock-Up Agreements." Lock-up periods are contractual between insiders and underwriters; the SEC imposes no mandatory lockup period. ipogo.cooley.com. Early release provisions (e.g., when stock trades above 130% of IPO price for a specified period) are common and negotiated at deal time.
2. SEC Rule 144, 17 CFR § 230.144 — affiliate volume limitation (1% of outstanding shares or 4-week avg weekly volume per 3-month period), current public information requirement, manner-of-sale requirement, Form 144 filing threshold ($50,000 or 5,000 shares in any 3-month period). sec.gov/smallbusiness/exemptofferings/rule144.
3. SEC Final Rule 33-11138 (December 2022, effective February 27, 2023) — amended Rule 10b5-1 cooling-off period for directors and officers: the later of (a) 90 days after plan adoption, or (b) two business days following the public disclosure of financial results for the fiscal quarter in which the plan was adopted; capped at 120 days. Written certification of no MNPI and good-faith adoption required at plan inception. sec.gov/newsroom/press-releases/2022-222.
4. IRS Rev. Proc. 2025-32 — 2026 long-term capital gains rate thresholds: 0% for taxable income ≤$49,450 (single) / ≤$98,900 (MFJ); 15% up to $545,500 (single) / $613,700 (MFJ); 20% above those amounts. irs.gov/pub/irs-drop/rp-25-32.pdf.
5. IRC § 1411 — Net Investment Income Tax: 3.8% on net investment income (including capital gains) for single filers with MAGI >$200,000 and MFJ filers with MAGI >$250,000. Thresholds are statutory (not inflation-adjusted). law.cornell.edu/uscode/text/26/1411.
6. IRC § 1202 as amended by the One Big Beautiful Bill Act (OBBBA, July 2025) — QSBS exclusion increased to $15M (from $10M) per taxpayer per issuer; tiered rates: 50% exclusion for stock held 3–4 years, 75% for 4–5 years, 100% for 5+ years; $50M gross assets test at issuance unchanged; original issuance requirement unchanged. law.cornell.edu/uscode/text/26/1202.

Rule 144 volume limits and Form 144 requirements per 17 CFR § 230.144, unchanged. 10b5-1 cooling-off period per SEC Final Rule 33-11138 (effective February 27, 2023). 2026 LTCG rates per IRS Rev. Proc. 2025-32. NIIT thresholds per IRC § 1411, statutory. QSBS exclusion per IRC § 1202 as amended by OBBBA (July 2025). Values verified April 2026.