Series B funding is the round of investment a venture-backed company typically raises after its Series A, once it has a working product, a growing base of customers and some evidence of a repeatable business model. Where earlier rounds pay for building and testing, Series B money is mainly used to expand: hiring sales and engineering teams, entering new markets, adding products or buying smaller rivals.
The name comes from the class of preferred shares issued in the round, "Series B Preferred", following the Series A shares sold earlier. Later rounds continue the alphabet with Series C, D and beyond. Series B rounds are usually led by venture capital firms that specialise in growth-stage companies, and they follow the seed funding and Series A stages that carry the earliest risk.
Series B funding in plain terms
Picture a bakery that started at a market stall with money from a few friends, then raised enough to open one shop. The shop is busy, customers come back and the recipes work. The owner now wants to open ten shops in nearby towns and build a central kitchen. That plan needs far more money than the first shop did, and it comes from bigger investors who are less interested in whether the bread is good, since that is already proven, and more interested in whether the model can be copied.
Series B is that second, larger push. Investors pay a higher price per share than before, because the business is less risky, but they expect it to grow quickly.
How Series B differs from earlier rounds
| Stage | Main purpose | Typical lead investors |
|---|---|---|
| Seed | Build a product and test demand | Angels, accelerators, seed funds |
| Series A | Prove a repeatable business model | Early-stage venture firms |
| Series B | Scale sales, teams and markets | Growth-focused venture firms |
| Series C and later | Expand further, prepare for exit | Late-stage funds, private equity, corporates |
Investors at Series B pay closer attention to measurable results such as revenue growth, customer retention, gross margins and the cost of acquiring each customer. The valuation is usually several times higher than at Series A, though it can also be lower, a "down round", when the company has missed targets or markets have fallen.
Typical terms
Series B investors usually buy convertible preferred stock, which carries rights that ordinary shareholders do not have. Common terms, negotiated in a term sheet, include:
- Liquidation preference. Investors get their money back, sometimes with a multiple, before ordinary shareholders if the company is sold or wound up.
- Anti-dilution protection. If later shares are sold at a lower price, the conversion terms adjust in the investors' favour.
- Board seats and protective provisions. The lead investor often joins the board of directors and gains veto rights over major decisions.
- Pro-rata rights. Investors may keep the right to invest in future rounds to maintain their percentage.
Each new round dilutes existing holders, and the changes are recorded in the company's cap table. Existing investors, including Series A backers, often take part again. Rounds are sometimes split into tranches released when the company hits agreed targets, and companies that need money before they are ready for a full Series C may raise an extension, often labelled "Series B-2" or similar, on terms close to the original round. Strategic investors, such as large companies in the same industry, may join to gain a partnership or an early look at a possible acquisition.
Due diligence
Because the sums are larger, Series B investors carry out deeper due diligence than earlier backers. They examine financial statements, contracts, customer data, legal structure, intellectual property and regulatory status. For fintech and crypto firms this includes licences, banking relationships and compliance programmes, since a missing money transmitter licence or weak anti-money laundering controls can threaten the whole business.
Series B in fintech and crypto
Fintech companies often raise Series B rounds to fund expansion into new countries, where each market brings separate licensing and partnership costs. Crypto companies such as exchanges, custodians and infrastructure providers raise conventional equity rounds in the same way, while protocol projects may combine equity with token warrants. During the 2021 boom many crypto and fintech firms raised large Series B rounds at high valuations, and several later raised again at lower prices or closed when markets turned in 2022.
Risks
A Series B round raises expectations: the company must now show rapid growth to justify its valuation and to raise again. Spending heavily on expansion before the model is truly proven can leave a firm with high costs and little cash, and liquidation preferences mean ordinary shareholders, including staff with stock options, may receive little in a modest sale. For investors, shares remain illiquid until an initial public offering or acquisition, which may never come. Nothing here is advice to invest.