Definition
A Series B is a venture financing round that generally follows Series A and is associated with a company that has progressed further in developing and validating its business. The capital is typically used to expand operations, increase customer acquisition, enter new markets, strengthen the team, develop the product, or pursue other growth opportunities.
Series B is an industry convention rather than a globally standardised legal or financial classification. The characteristics of companies raising Series B vary across countries, sectors, business models, and investor markets. The OECD has documented significant differences in how venture investment stages are classified internationally.
Series B financing is commonly structured as equity investment, although the precise securities, valuation, investor rights, and other terms depend on the transaction and applicable jurisdiction.
What is Series B funding used for?
Series B capital is generally intended to help a company move from establishing a viable business toward larger-scale growth.
Depending on the company, funding may support:
Expanding into new geographic markets
Increasing sales and marketing
Growing the product and engineering organisation
Hiring senior leadership
Expanding operational capacity
Increasing production
Developing additional products
Strengthening infrastructure
Acquiring customers at greater scale
Supporting strategic acquisitions
The appropriate use of Series B capital depends on what the company has already achieved and what it needs to accomplish next.
What does a company typically demonstrate before Series B?
There is no universal Series B checklist.
Investors may evaluate evidence such as:
Sustained revenue or user growth
Stronger customer adoption
Evidence of product-market fit
Repeatable customer acquisition
Improving unit economics
Market expansion opportunities
A scalable operating model
A strong management team
A large addressable market
A credible path to continued growth
The relevant evidence varies considerably by industry.
A SaaS company may be evaluated heavily on recurring revenue, retention, customer acquisition efficiency, and expansion revenue. A marketplace may be evaluated on transaction volume, liquidity, retention, and network development. A deep-tech company may place greater emphasis on technical milestones, commercialisation, or regulatory progress.
Who invests in Series B rounds?
Series B investors may include:
Venture capital firms
Growth-oriented venture capital firms commonly participate in Series B financing.
Existing investors
Investors from earlier rounds may participate again to maintain their ownership or increase their investment.
New institutional investors
A Series B can introduce new investors whose investment criteria are focused on companies at a later stage of development.
Strategic investors
Corporate or strategic investors may participate when the company's technology, market position, or products align with their strategic interests.
The right investor is determined by more than stage. Sector, geography, investment thesis, portfolio strategy, cheque size, and strategic fit can all matter.
How does a Series B round work?
The process generally follows the same broad structure as other institutional equity financings:
Establish the fundraising objective
Identify suitable investors
Present the company and growth opportunity
Conduct investor evaluation
Complete due diligence
Negotiate financing terms
Execute legal documentation
Close the investment
The exact process and documentation depend on the financing structure and jurisdiction.
Series B vs. Series A
The distinction is primarily about company maturity and the purpose of the capital.
Series A | Series B | |
|---|---|---|
Typical company position | Early commercial development | More established growth |
Main objective | Build and validate a scalable business | Expand and scale |
Product | Established and developing | More mature |
Market evidence | Meaningful early evidence | Generally broader evidence |
Capital use | Team, product, early go-to-market | Expansion, scale, new markets |
Investor profile | Early-stage institutional investors | Later-stage venture and growth investors |
These are broad patterns, not requirements.
A company can raise an unusually large Series A or a relatively small Series B. The round label alone does not establish the company's revenue, valuation, growth rate, or maturity.
Series B vs. Series C
Series C generally represents a later stage of financing than Series B, but there is no universal threshold separating the two.
Broadly:
Series B: scaling an increasingly established business.
Series C: providing additional capital for substantial expansion, market development, acquisitions, or other later-stage objectives.
Some companies may raise several rounds between these labels, while others may use different financing structures altogether.
How much is a Series B?
There is no globally applicable Series B amount.
Round sizes vary according to:
Geography
Industry
Company maturity
Revenue and growth
Capital intensity
Market conditions
Investor demand
Currency
Financing strategy
A fixed amount should therefore not be treated as part of the definition.
If Uma publishes Series B funding statistics, they should be presented as dated research with the relevant geography and methodology.
Does Series B mean the company is profitable?
No.
A Series B company may be profitable, approaching profitability, or intentionally investing heavily in growth.
Profitability is influenced by the company's business model, growth strategy, capital requirements, and market conditions. The Series B label does not establish a company's financial position.
Does Series B mean the company has product-market fit?
Not automatically.
Many companies raising Series B have developed substantial evidence of product-market fit, but the concept is not a formal requirement of the financing stage.
Investors may assess product-market fit through different indicators depending on the business.
Example
A B2B software company raised a Series A after demonstrating strong early customer adoption and a repeatable sales process.
Over the following period, it expands its customer base, increases recurring revenue, and establishes operations in its initial market.
The company now wants to enter several additional countries and significantly expand its sales and engineering teams.
It raises a Series B from new and existing venture investors.
The financing provides capital to scale the organisation and pursue international expansion.
Common misconception
Series B is simply a larger version of Series A.
Not necessarily.
The amount raised may be larger, but the more meaningful distinction is the company's stage of development and the purpose of the financing.
Series A is generally associated with developing a scalable business after early validation. Series B is generally associated with scaling a more established business.
The labels themselves are conventions, not universal definitions.
