Co-invest rights: what they are, why secondary buyers rarely get them, and how to price that gap.

Every sophisticated venture investor knows that the headline check is only part of the return story. The other part is the pro-rata right — the contractual entitlement to participate in future financing rounds at the same terms as new investors, up to a defined percentage of the new round. For early investors in companies like Stripe, SpaceX, or Anthropic, those pro-rata rights have been worth more than the original investment itself. When you buy a secondary interest, you almost never get them.

What pro-rata and co-invest rights actually mean

A pro-rata right gives an existing shareholder the option to buy enough shares in a new financing round to maintain their percentage ownership. If you own 1% of the company before a Series D, a pro-rata right lets you buy 1% of the Series D. You are not diluted — unless you choose not to exercise.

A co-invest right is a related but distinct privilege. It typically grants an investor the option to participate in a deal alongside the lead investor — sometimes at the same terms, sometimes in a dedicated side vehicle — beyond what their pro-rata allocation would allow. Both rights are negotiated at the time of the primary investment and recorded in the investor rights agreement or side letter.

Neither right is attached to the share itself. They are attached to the person or entity named in the investor rights agreement. That distinction is everything in a secondary transaction.

Why secondary buyers almost never inherit these rights

When a seller transfers shares on the secondary market — whether through a direct transfer, a special purpose vehicle (SPV), or a forward contract — they are moving economic exposure, not contractual identity. The company's investor rights agreement almost always says that pro-rata rights are personal to the original investor and non-transferable. The transfer agreement the company countersigns typically confirms this explicitly.

Even in a direct secondary where you receive actual shares (not an SPV interest), you become a new entry on the cap table as a late-arriving stockholder with no separately negotiated rights. You get the economics of the shares — dividends if any, liquidation proceeds, conversion rights if preferred — but not the governance participation rights the original holder negotiated years ago.

There are rare exceptions. Some companies — particularly those actively managing their cap tables — will negotiate new information rights or even limited participation rights for large incoming secondary buyers as a condition of granting transfer approval. This is more common in structured block trades above $50 million and is negotiated directly with the company's general counsel. For most secondary transactions in the $25k–$5M range, it does not happen.

How to price the rights gap

The loss of pro-rata rights matters most in companies that are still early in their fundraising trajectory — where multiple future rounds are expected and those rounds are likely to be highly dilutive to passive holders. For a company perceived to be approaching an IPO or a terminal liquidity event in the next 12–24 months, the practical impact is smaller: there may not be another primary round to participate in.

The framework most experienced secondary buyers use is a dilution sensitivity model. Start with the current fully diluted share count. Estimate one to two additional financing rounds before a liquidity event, using the company's recent round history as a base. Model your ownership percentage after each round, assuming you exercise no pro-rata. Compare that ending ownership to what it would have been had you been an original investor with pro-rata rights. The difference in exit proceeds is your rights gap.

For high-growth companies still in early growth stages — Perplexity, Mistral AI, Cohere, and others on our marketplace that are several rounds away from a liquidity event — this gap can be meaningful. A company that raises two more rounds at increasing valuations and issues 15–20% new shares each time could dilute a passive secondary holder by 25–30% relative to an active pro-rata exerciser.

• Estimate the number of remaining rounds before liquidity based on the company's stage and capital intensity.
• Apply a historical dilution-per-round assumption (typically 10–20% for growth-stage companies).
• Calculate cumulative dilution and apply it to your projected exit proceeds.
• Discount the secondary price you are willing to pay by the present value of the foregone pro-rata upside.

This analysis will not give you a precise number — private company modeling never does. But it will tell you whether the rights gap is likely to be 2% of your return or 20%. That range matters when you are deciding whether the current secondary ask price is fair.

What secondary buyers do get

It is worth being precise about what transfers along with the economic interest. In most secondary transactions, the buyer inherits the same liquidation preferences, conversion rights, anti-dilution protections, and drag-along obligations that attach to the share class itself. If you are buying Series B preferred shares, you get Series B preferred economics. The rights gap is specifically about the contractual privileges in the investor rights agreement — not the share certificate.

In an SPV structure, you own a membership interest in a vehicle that holds the underlying shares. You still benefit from the underlying share economics, but you also carry the SPV's fee and carry structure, which adds another layer of return drag. Reading the SPV operating agreement carefully — particularly the sections on GP discretion, exit distribution waterfall, and fees — is essential before committing capital.

Questions to ask before you commit

1. What share class am I buying, and what are its liquidation and conversion terms?
2. Does the investor rights agreement survive transfer, and which provisions are personal to the original investor?
3. How many additional primary rounds does management signal before a liquidity event?
4. At the current secondary price, what is my implied return if I am diluted by one more round vs. two?
5. If buying via SPV, what are the total fees and carry, and when does carry attach?

We include issuer-level transfer policy summaries and share class documentation in deal materials for every listing on Limen Markets, so you can answer most of these questions before you submit an indication of interest. Browse the current listings at /marketplace to see what documentation is available for each issuer.