Suppose you hold shares in a private company that has appreciated significantly. A secondary sale is one option, but you want to keep your upside exposure — or you are subject to a lock-up that prevents a sale. So you explore structures that effectively lock in today's value without technically transferring the shares. The problem is that the IRS anticipated exactly this scenario. Section 1259 of the Internal Revenue Code, the constructive sale rule, treats certain hedging arrangements as if you sold the appreciated position on the date you entered the hedge — which means you owe tax immediately, even though you still own the shares.
This article is a general educational overview. It is not tax or legal advice. Anyone considering a hedging strategy involving appreciated private securities should work with a qualified tax advisor before proceeding.
What Section 1259 actually says
A constructive sale occurs when a taxpayer holds an appreciated financial position and then enters into a transaction that leaves them with no meaningful risk of loss and no opportunity for gain on that position. The classic example is a short sale against the box: you own 1,000 shares and you short 1,000 shares of the same stock. You have locked in the current price — you cannot lose more, and you cannot gain more. The IRS treats that as a sale on the date you entered the short.
The statutory language is intentionally broad. It reaches beyond short sales to include forward contracts, futures contracts, and certain notional principal contracts (swaps) that eliminate substantially all risk of loss and opportunity for gain. In private securities, this most commonly arises with forward contracts, because short selling is not available for non-public shares.
How this applies to pre-IPO holders specifically
Pre-IPO shareholders sometimes explore forward contracts as a way to monetize appreciated shares without an immediate outright sale. A forward contract in the private securities context typically involves an agreement to deliver shares (or the cash equivalent) at a fixed future price. If that contract is structured to eliminate substantially all downside risk, Section 1259 treats the execution of the contract as a constructive sale — triggering recognition of the gain at that moment, at the share's then-current fair market value.
The fair market value question is genuinely complicated for private shares. The IRS does not accept a handshake valuation. The most defensible reference point is the company's most recent 409A appraisal, though a 409A is a floor for options pricing, not necessarily the value a secondary market would assign. If the secondary market price exceeds the 409A, the IRS could use the secondary price as evidence of fair market value for constructive sale purposes. This creates a situation where secondary market liquidity, rather than helping the holder, exposes them to a higher taxable gain on a deemed sale they did not intend to make.
The exception: closing the position within 30 days
Section 1259 includes a narrow exception that practitioners sometimes call the 30-day window. If you enter a transaction that would otherwise be a constructive sale, you can avoid constructive sale treatment if you close the offsetting position within 30 days after the end of the tax year in which you entered it, and you hold the original position unhedged for 60 days thereafter. Both conditions must be met — close the hedge and hold the underlying unhedged for the required period.
In practice, this exception is difficult to execute cleanly with private securities. The 60-day unhedged holding period must be free of any other arrangement that substantially diminishes risk of loss. For a pre-IPO holder who has entered a forward and then wants to unwind, finding a counterparty willing to cancel or offset the forward on a tight timeline — with private shares as the underlying — is not straightforward. The exception exists, but it is not a reliable planning tool for most holders.
Structures that are not constructive sales — and why the line is blurry
Not every hedging arrangement triggers Section 1259. Protective put options, for example, eliminate downside risk but preserve upside — the holder benefits if the stock rises above the strike. Because upside opportunity is preserved, a standalone put does not meet the statutory definition of a constructive sale. Collars that retain meaningful upside have also been argued to fall outside the rule, though the analysis depends heavily on how much upside is actually retained and whether the IRS views the specific terms as eliminating substantially all opportunity for gain.
The problem for pre-IPO holders is that puts and collars on private company shares do not exist in any liquid market. Any such arrangement would need to be negotiated bilaterally with a counterparty — typically a bank or broker-dealer that specializes in concentrated stock solutions — and the counterparty will price in the illiquidity, the lock-up, and the uncertainty of when (or whether) the shares become publicly tradeable. The economics often make these arrangements impractical unless the position is very large.
What sellers actually do: clean secondary sale versus complexity
For most pre-IPO holders, a clean secondary sale is a more tax-predictable path than a hedging structure. A secondary sale produces a realized gain or loss in the year of settlement, the holding period is clear, the tax treatment of long-term versus short-term gain is determined by the share class and acquisition date, and QSBS exclusion under Section 1202 — if applicable — is a defined calculation. There is no ambiguity about whether a deemed sale has occurred.
The trade-off is that a secondary sale terminates upside participation entirely. Holders who want to retain exposure to a company they believe has significant runway should make that choice explicitly — not by default, and not by assuming a hedging structure has cleanly solved the problem without creating a new tax event in the process.
Practical steps before you pursue any hedging strategy
- Confirm your shares' current fair market value — get the most recent 409A and, separately, check secondary market price indications for your issuer as a cross-reference.
- Determine your cost basis and acquisition date for each lot, including whether any lots qualify for Section 1202 QSBS treatment — hedging a qualifying QSBS position can forfeit the exclusion in ways that are distinct from constructive sale rules.
- Ask your tax advisor specifically whether the proposed structure eliminates substantially all risk of loss and opportunity for gain under Section 1259 — the answer to that question determines everything.
- If you are subject to a company transfer restriction or lock-up, confirm whether the hedging arrangement itself would constitute a prohibited transfer under your equity award agreement or the company's transfer policy.
- Model the after-tax proceeds of a clean secondary sale against the projected after-tax outcome of the hedging structure, including the advisor fees and counterparty costs on the hedge — the comparison is often closer than expected.
If a straightforward secondary sale fits your objectives, Limen Markets lists confirmed seller-side supply across 28 issuers with 1–5 day settlement. You can review current listings at /marketplace or read through the seller timing framework at /resources/seller-timing-a-secondary-sale-around-company-milestones before deciding.