When you buy a share of Apple on the Nasdaq, millions of shares change hands every day. The float — the portion of shares available for public trading — is enormous, and any individual buyer has near-zero impact on price discovery. In private markets, none of that is true. Secondary float is tiny, illiquid, and concentrated. That single fact shapes everything downstream: pricing, timing, counterparty risk, and whether your indication ever converts to a closed trade.
What 'float' means in a private secondary context
In public markets, float refers to shares freely tradeable by the public. In private secondaries, the equivalent concept is simpler and starker: it is the set of holders willing and legally permitted to sell at any given moment. That pool is far smaller than the total shares outstanding — often a fraction of a percent of the cap table.
Several forces compress the supply side. First, many employees and early investors are still under vesting schedules or post-grant holding requirements. Second, transfer restrictions in shareholder agreements and company bylaws require company consent before any transfer, and companies routinely exercise a Right of First Refusal (ROFR) — buying back shares at the agreed transfer price rather than letting a third party in. Third, sophisticated long-term holders simply choose not to sell, especially in names where the next liquidity event looks close. What remains as tradeable supply at any given time is thin.
Why supply concentration changes your risk calculus
When supply is concentrated — meaning a small number of sellers account for most of the available float — buyers face two hidden risks that rarely show up in price discussion.
The first is fall-through risk. A fall-through occurs when a matched trade fails to close: the seller withdraws consent, the company exercises ROFR, or a transfer restriction proves harder to navigate than either party anticipated. In a deep market, a fall-through is an inconvenience. In a thin market, it can mean waiting months for another seller to surface. If your indication was matched against one of only three willing sellers in a name, a single fall-through removes roughly a third of your available supply.
The second is price fragility. When supply is thin, a single motivated buyer — or a short burst of demand following a news event like a fundraising round or a rumored tender offer — can push prices sharply. You may have been quoted $38 per share on Monday based on a seller willing to transact at that level. By Thursday, that seller has received competing interest and revised their ask. The price you anchored on was real but fleeting.
How ROFR amplifies supply concentration
ROFR — the company's contractual right to step into a buyer's shoes and purchase the shares at the agreed transfer price — is the mechanism most responsible for secondary float evaporating at the worst moment. If a company receives notice of a proposed transfer and elects to exercise its ROFR, the original buyer receives nothing: no shares, no compensation for due diligence time, no priority on the next available lot. The seller receives their proceeds, but from the company, not you.
Companies are more likely to exercise ROFR when they want to manage cap table composition — limiting the number of outside investors — or when the transfer price implies a valuation they consider unflattering ahead of a raise. That means ROFR risk is highest precisely when you most want to buy: after a strong primary round when sentiment is positive and supply is already being absorbed.
How to evaluate supply depth before you commit
Buyers who consistently close trades ask the right questions before submitting an indication. The goal is to understand not just whether supply exists at the quoted price but how durable that supply is.
- Ask whether supply is confirmed at the moment of your indication, or whether it is indicative — a soft estimate of what might be available based on prior conversations with potential sellers.
- Ask how many distinct sellers make up the available lot. A single $500k seller offering you the whole block is structurally different from five sellers each contributing $100k.
- Ask about ROFR history for the issuer. Has the company exercised ROFR on recent transfers? At what frequency? This is a proxy for how likely your trade is to close as structured.
- Ask what the settlement timeline looks like assuming ROFR is cleared and company consent is granted. A quoted 1–5 day settlement is meaningful only if ROFR is being managed in parallel, not sequentially.
- Ask whether the marketplace uses templated transfer and SPV documents or bespoke agreements. Bespoke legal work is a common source of delay that erodes the value of an otherwise attractive price.
At Limen Markets, confirmed seller-side supply is a baseline requirement before a listing reaches the marketplace. Our ROFR process runs in parallel with execution — not after — so settlement timelines of one to five business days are structurally achievable rather than theoretical.
Supply concentration by name: not all issuers are equal
Across the 28 issuers on our platform, secondary float varies significantly. Some names — where the company has historically been permissive of transfers and where a large, distributed employee base creates regular selling interest — tend to have broader supply at any given time. Others are tightly held: founder-controlled, with transfer restrictions that require board approval and where even willing sellers may be contractually limited in the size of the position they can sell in a rolling period.
Names at an earlier stage on the IPO path tend to have thinner float because early holders are still waiting for the primary liquidity event. Names where a tender offer has recently completed may temporarily have even thinner float: the tender absorbed willing sellers, and remaining holders have a stronger conviction view — meaning they are less likely to sell at current secondary marks.
Names that have raised a large primary round within the past six to twelve months often see a temporary uptick in secondary supply as early employees and angels reassess their concentration after seeing a new headline valuation. That window is typically narrow: three to six months after a primary close before supply tightens again.
The SPV structure's effect on float perception
When you buy through a Special Purpose Vehicle (SPV), you are purchasing a membership interest in an entity that holds shares — not the shares directly. This matters for float analysis because the same underlying position can appear in the market multiple times: once as a direct transfer opportunity and once as an SPV interest being sold by an earlier SPV investor. Buyers should confirm they are not inadvertently bidding against themselves across different listings of economically equivalent exposure.
SPV structures also add one more party — the GP or fund manager — whose consent and cooperation is required for the transfer of your membership interest. In a thin market, delays at the GP level can be as costly as delays at the company level. Always confirm whether the SPV's operating agreement permits secondary transfers of LP or member interests, and whether the GP has a pattern of approving them promptly.
Practical takeaways
- Treat confirmed supply as a precondition, not a nice-to-have. An indicative price without confirmed supply is a starting point for a conversation, not a trade.
- Evaluate ROFR history for any issuer before submitting a large indication. A company with a pattern of exercising ROFR changes your expected-value calculation materially.
- Diversify across names where possible. In thin markets, concentration in a single issuer exposes you to both the company risk and the supply risk simultaneously.
- Move with reasonable speed when supply is confirmed. In concentrated secondary markets, hesitation has a real cost — supply evaporates faster than public market prices move.
- Clarify whether your marketplace clears ROFR in parallel with, or after, execution. Sequential ROFR processes add weeks to settlement and introduce optionality for the company to re-evaluate.
Understanding float in private secondaries will not guarantee a trade closes, but it will significantly improve the quality of your decision-making at the indication stage. Browse current listings with confirmed supply across all 28 issuers on the Limen Markets marketplace to see where depth currently exists.