---
title: "Follow-On Investment"
url: "https://mahouse.world/glossary/follow-on-investment"
type: "glossary term"
topic: "Venture funding"
author: "Ihor Vlasov"
reviewed: "2026-09-20"
published: "2026-08-10"
---

# Follow-On Investment

A follow-on investment is money an existing investor puts into a company's later round — exercising its pro-rata right to keep its stake, or investing more to increase it — from reserves the fund set aside when it first invested. Follow-ons are how venture funds concentrate capital in their winners, how founders read which investors believe in them, and what a new lead investor watches before it commits.

**Also known as:** Follow-on, Follow-on round, Reserves

## Key facts

- **Used at:** every round after an investor's first; typically half of a venture fund's capital is reserved for follow-ons into its existing portfolio
- **Binding:** the pro-rata right in the shareholders' agreement gives the option; the fund's reserves policy decides whether it is taken
- **Typical reserve:** 1–2× the initial investment for seed funds, 1× for later-stage; the reserve is allocated to the companies that are working and withheld from the ones that are not
- **Typical signal:** an existing investor taking its full pro-rata is a positive the new lead reads; one declining is a question the new lead asks; one leading the round itself (an "inside round") is either strong conviction or a lack of outside interest
- **Parties:** the existing investors and their reserves, the founders, and the new lead, who prices partly on what the insiders do

## How follow-on investment works in practice

A seed fund invests €1m in a company at a €10m post-money — 10%. The company raises a Series A of €8m at €32m pre-money. The fund's pro-rata is 10% of the round, €800,000, which keeps its stake at 10%; it can take less and be diluted, or, if the lead allows, more. The fund has reserved €1.5m for this company and takes the full pro-rata. At the Series B, €20m at €80m pre, its pro-rata is €2m; it has €700,000 left and takes that, diluting to 8.6%. At the C it has nothing left and dilutes to 7%. Its €2.5m invested is worth €14m at the C price — the follow-ons doubled its money in the company against what the initial cheque alone would have held.

Reserves policy is the fund's portfolio discipline. Follow-on into every company and the fund's return is the average; follow-on into the winners and starve the rest and the return is the winners'. Funds therefore decide follow-ons company by company, and a decision not to follow is a decision — one the founders learn from the term sheet and the new lead learns from the cap table.

In fintech rounds the follow-on has a regulatory shadow: an investor whose stake crosses 10% through follow-ons becomes a controller, and the regulator's approval is required before, not after.

## Example

A Series A fund with 20% of a lending fintech and €4m of reserves faces the Series B: €25m at €75m pre-money, pro-rata €5m. Its options: take €4m (diluting to 19%); take €5m by borrowing €1m from another portfolio company's reserve; or take nothing and dilute to 15%. The company's metrics are ahead of plan and the new lead has asked whether insiders are "supportive". The fund takes the full €5m, reallocating €1m from a company it has decided not to bridge. Two years later the fintech sells for €400m: the fund's 19% is €76m on €9m invested; the €5m follow-on alone returned €38m. The company whose reserve was reallocated closed eight months later, which was why the reserve was available.

## Common mistakes

- Following on into every company pro rata, so the reserves go to the average rather than the winners.
- Reserves exhausted at the Series A so the fund cannot support the B, and the new lead reads the absence.
- Founders treating an insider's follow-on as an entitlement rather than a decision.
- An insider follow-on that crosses a control threshold without the regulator's prior approval.
- New leads pricing an inside round as validation when the insiders were the only bidders.

## Related terms

- [Pro Rata Right](https://mahouse.world/glossary/pro-rata-right.md)
- [Series B](https://mahouse.world/glossary/series-b.md)
- [Bridge Financing](https://mahouse.world/glossary/bridge-financing.md)
- [Venture Capital](https://mahouse.world/glossary/venture-capital.md)
- [Cap Table](https://mahouse.world/glossary/cap-table.md)
- [Anti-Dilution Protection](https://mahouse.world/glossary/anti-dilution-protection.md)

— Ihor Vlasov, M&A FinTech Expert. Last reviewed 2026-09-20. https://mahouse.world/authors/ihor-vlasov