Most Active Series B Investors in Europe

What is a Series B round?

A Series B round is a priced equity financing round that typically follows a Series A and precedes a Series C. It sits in the growth stage of the funding lifecycle, after a startup has demonstrated product-market fit and initial commercial traction, and before the company reaches the scale required for late-stage or pre-IPO capital.

What distinguishes Series B from adjacent stages is the burden of proof. At Series A, investors are largely betting on a credible path to product-market fit and a strong founding team. At Series B, that bet has been partially validated. Investors expect to see consistent revenue growth, a repeatable go-to-market motion, and evidence that the business can scale efficiently. The conversation shifts from 'can this product work?' to 'can this company grow fast enough to justify the valuation and capture the market opportunity?'

Compared to Series C and beyond, Series B companies are still in the process of building out their operational infrastructure. The management team may not yet be fully professionalised, international expansion may be nascent, and unit economics, while improving, may not yet be at the efficiency levels institutional growth investors require. This makes Series B a transitional round — the company is no longer an early-stage experiment, but it has not yet reached the predictability of a late-stage growth business.

In European venture markets, Series B rounds have grown significantly in size over the past decade as more dedicated growth-stage funds have entered the ecosystem. The round is almost always structured as preferred equity with a negotiated pre-money valuation, rather than a convertible instrument, reflecting the greater capital deployed and the need for clear governance terms.

What are the goals of Series B funding?

Series B capital is primarily used to accelerate growth that has already been demonstrated at Series A scale. Rather than funding experimentation, it funds execution. The core deployment areas are sales and marketing expansion, geographic growth, team scaling, and in some cases product deepening to defend or extend a market position.

On the go-to-market side, founders typically use Series B proceeds to build out a more structured commercial function. This means hiring senior sales leadership, expanding the sales development and account executive workforce, investing in demand generation infrastructure, and often entering new customer segments or verticals where early signals exist but penetration is still low.

Geographic expansion is a particularly prominent use of Series B capital in Europe, where the fragmented nature of the market means that dominating one country rarely constitutes a large enough opportunity for institutional investors. A Series B round will frequently fund entry into two to four new European markets, or in some cases an initial push into the United States or other international markets.

Team buildout at the Series B stage often includes hiring the first wave of senior functional leaders — a VP of Engineering, CFO, Chief Revenue Officer, or VP of People — who can help transition the company from a founder-led operating model to a more scalable management structure.

Infrastructure investment is also common, including technology platform improvements to handle greater volume, data and analytics capabilities to manage a more complex business, and operational systems such as ERP or CRM implementations. The milestones the round is meant to fund typically centre on reaching a revenue level, geographic footprint, or market share position that makes the company a credible candidate for a Series C or an alternative liquidity path.

Is my startup ready to raise a Series B round?

Investors evaluating a Series B will look for a specific cluster of signals across revenue, growth efficiency, team maturity, and market position. No single metric is determinative, but the overall picture must suggest that capital deployment will accelerate a trajectory that is already clear.

On the revenue side, European Series B candidates typically have reached meaningful annual recurring revenue for SaaS businesses or equivalent revenue scale in other models. More important than the absolute number is the growth rate — consistent year-on-year or quarter-on-quarter growth that has been maintained over multiple periods, not a single spike. Investors want to see that growth is not decelerating sharply as the company scales.

Unit economics are scrutinised closely at Series B in a way they are not always at earlier stages. Customer acquisition costs, lifetime value ratios, payback periods, and gross margins must indicate that the business becomes more efficient as it grows, or at least that there is a credible path to efficiency. Net revenue retention above one hundred percent is a particularly strong signal in subscription businesses.

On the team side, investors look for evidence that the founding team has successfully hired and retained strong operators, and that the company is not entirely dependent on founder execution in every function. The presence of experienced sales, product, and engineering leaders signals institutional readiness.

Market signals matter as well. Investors want evidence that the total addressable market is large enough to justify a significant outcome, and that the startup has a defensible position within it — whether through technology differentiation, network effects, switching costs, or brand. A pipeline of inbound enterprise interest, expanding contract sizes, or early international traction can all contribute to a compelling readiness signal.

What is the typical size of a Series B round?

In Europe, Series B rounds have typically ranged from approximately fifteen million to eighty million euros, with the median for most sectors sitting somewhere in the thirty to fifty million euro range. However, round sizes vary considerably by sector, geography, and the specific growth trajectory of the company.

Deep tech, life sciences, and semiconductor companies often raise larger Series B rounds due to the capital intensity of their development cycles and the longer timelines to commercialisation. Enterprise software and fintech companies tend to cluster in the mid-range, while marketplace and consumer businesses can vary widely depending on the capital efficiency of their model.

Geography within Europe also influences round size. London-headquartered companies have historically raised larger Series B rounds, partly because the city attracts more international and US-based investors who are comfortable with higher valuations and larger check sizes. Scandinavian markets, particularly Sweden and Finland, have a strong track record of capital-efficient growth, and Series B rounds there can sometimes be on the smaller end of the range while still representing significant milestones. Southern and Eastern European startups are increasingly raising competitive rounds, though round sizes still tend to run slightly smaller on average due to lower local valuations and a smaller base of institutional capital.

Compared to Series A, which in Europe typically ranges from five to twenty million euros, Series B represents a meaningful step up in both round size and investor expectations. Compared to Series C, which in Europe can range from sixty million euros to several hundred million for breakout companies, Series B is still considered growth-stage rather than pre-IPO or late-stage capital. The valuation step-up from Series A to Series B, assuming on-track performance, is typically between two and four times.

Different types of Series B investors

How to create a fundraising strategy for a Series B round

A Series B fundraising process should be treated as a structured, time-bounded campaign rather than an open-ended series of conversations. The typical process runs six to twelve months from initial preparation to close, with the active market phase ideally compressed into eight to twelve weeks to maintain competitive tension and avoid process fatigue.

Preparation should begin three to six months before the founder intends to take the first external meeting. This means stress-testing the data room, ensuring financial models are investor-grade, identifying gaps in the story, and ideally resolving them before going to market. Founders should build a clear narrative that connects historical performance to future potential without overpromising, and prepare for rigorous diligence on unit economics, cohort data, and team depth.

Sequencing matters considerably. Founders should typically begin with investors they are most confident in as strategic fits, using early conversations to refine the pitch before approaching their highest-priority targets. Running conversations in parallel rather than sequentially is important for creating competitive dynamics that can influence valuation and terms. A term sheet from a credible lead investor often accelerates commitment from others.

Positioning at Series B should be anchored in metrics rather than vision. Investors at this stage are less persuaded by market size arguments alone and more focused on demonstrated momentum. The pitch should lead with what has been built, not what could be built.

Founders should also think carefully about investor mix. A well-constructed Series B syndicate often includes a lead with growth-stage expertise, one or two value-add co-investors, and potentially a strategic investor if relevant. Filling the round with too many small investors can complicate governance and future fundraising. Legal counsel experienced in European venture transactions should be engaged early to manage term sheet negotiation efficiently.

What terms and dilution should I expect at Series B?

Series B rounds in Europe are almost universally structured as priced equity rounds, issuing new preferred shares rather than convertible instruments such as SAFEs or convertible notes. By Series B, the company's valuation is substantial enough and the investor capital large enough that both parties benefit from a clearly negotiated pre-money valuation and a full set of investor rights captured in a shareholders' agreement.

The preferred shares issued at Series B typically carry liquidation preferences, anti-dilution protections, pro-rata rights for future rounds, and information rights. Liquidation preferences are most commonly one times non-participating, meaning investors receive their investment back ahead of common shareholders in a downside exit, but do not double-dip into the remaining proceeds. In competitive rounds, founders can sometimes negotiate away participating preferences, while in less competitive processes investors may push for one times participating structures.

Anti-dilution provisions are standard and usually structured as broad-based weighted average, which is less punitive to founders than full ratchet anti-dilution in a down round scenario. Pro-rata rights allow existing investors to maintain their ownership percentage in future rounds, which can become a negotiating point when the company is growing rapidly and future rounds are expected to be oversubscribed.

Founder dilution at Series B typically ranges from fifteen to twenty-five percent of the post-money capitalisation, depending on round size relative to valuation. When considered cumulatively with seed, Series A, and employee option pool expansion, founding teams at Series B close often hold between forty and sixty percent of the company on a fully diluted basis, though this varies considerably. Board composition typically shifts at Series B, with investors expecting one or two board seats and the introduction of one independent director being common.

Common mistakes founders make raising at Series B

One of the most common mistakes founders make at Series B is going to market too early. Unlike earlier stages where some investors will back potential, Series B investors are conducting serious financial diligence. If the metrics do not yet tell a compelling story, the process is likely to stall, and a failed or slow Series B process can damage both morale and market perception. Founders should be honest with themselves about whether the data is ready before launching.

A related mistake is underinvesting in the data room and financial model. Series B investors will stress-test cohort data, unit economics, and growth assumptions in detail. Presenting a financial model that does not reconcile with historical actuals, or being unable to answer granular questions about customer acquisition costs by channel, is a fast way to lose investor confidence.

Founders also frequently underestimate how long the process will take. Even in favourable conditions, Series B rounds in Europe commonly take six months or more from first meeting to close. Running out of runway during the process puts founders in a weak negotiating position and can force them to accept worse terms. Starting the process with at least twelve months of runway is a strong discipline.

Another common error is optimising only for valuation rather than for investor quality and syndicate composition. A higher valuation from an investor who does not add value beyond capital can create problems at Series C, particularly if the company's growth rate decelerates and the valuation step-up required is difficult to justify.

Finally, founders sometimes neglect existing investors during a Series B process. Existing lead investors who feel uninformed or bypassed can complicate rather than support a new round, particularly if their pro-rata rights or governance positions are affected by the new terms.

How does Series B funding differ across Europe?

The Series B landscape varies meaningfully across European geographies, shaped by the maturity of local venture ecosystems, the availability of domestic institutional capital, and the degree to which international investors are willing to lead rounds outside the most established hubs.

The United Kingdom, and London in particular, remains the most active Series B market in Europe. Companies headquartered there have access to a deep pool of domestic growth-stage funds, regular engagement from US investors, and a well-developed legal and advisory infrastructure for completing large rounds efficiently. Round sizes in London tend to be at or above the European median, and processes move relatively quickly.

The DACH region, particularly Germany, has a growing Series B market centred on Berlin and Munich. German companies often benefit from strong enterprise relationships and a serious engineering talent base, but the investor ecosystem has historically been more conservative in valuation terms than London or the Nordics. International investors are increasingly active here, particularly in B2B software and industrial technology.

The Nordic countries have produced a disproportionate share of European Series B companies relative to their population, particularly in Sweden and Finland. Nordic founders tend to be capital-efficient and metric-driven, and the region has developed a credible base of domestic growth-stage investors alongside strong relationships with international funds.

Southern European markets, including Spain, France, and Italy, have seen significant growth in Series B activity over the past several years, partly supported by increased government-backed fund activity and a growing cohort of experienced repeat founders. France in particular has seen substantial Series B deal flow in fintech, deep tech, and enterprise software.

Eastern European startups raising Series B rounds frequently do so with a pan-European or international investor syndicate, as domestic institutional capital at this stage remains limited, though the region continues to develop rapidly.

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