Mega Series A funding rounds are increasing in frequency
Hot startups are experiencing a steady increase in the typical size of Series A financing, with artificial intelligence driving a record-breaking surge in mega-rounds valued at $100 million or greater globally.
Hot startups are seeing a steady increase in the typical size of a Series A financing.
According to Crunchbase figures, startups around the world have closed at least 114 Series A rounds 1 valued at $100 million or greater so far this year. This represents the highest annual total seen in years, putting the metric well on pace to surpass historical peaks.
Furthermore, a substantial portion of these massive early-stage investments greatly surpass the $100 million mark. In total, this cohort of Series A beneficiaries has pulled in roughly $33 billion this year, featuring at least 12 individual funding events valued at $500 million or higher.
An AI thing
This surge in funding has been primarily propelled by artificial intelligence. Crunchbase statistics indicate that upwards of 70% of Series A transactions totaling $100 million or more were awarded to AI-centric companies.
This percentage includes several of the most substantial early-stage investments of the year. Notable examples feature a $1.2 billion injection into River AI, a Silicon Valley developer platform designed for training and serving custom models, alongside a $900 million investment in China-based Xpeng Robotics, which builds AI-powered humanoid robots.
A representative sample of 10 of the biggest Series A rounds, heavily featuring AI alongside a few other sectors, is highlighted below.
The heavy concentration of AI deals mirrors broader investment trends observed across all funding stages. During the first half of this year, total venture and growth funding directed at artificial intelligence startups reached an estimated $394 billion, accounting for approximately 77% of all invested capital. While the majority of those dollars went toward later-stage transactions, the Series A numbers demonstrate that the early-stage landscape shares a very similar AI footprint.
US leads for jumbo Series A deals.
Crunchbase data shows that roughly half of this year’s Series A rounds exceeding $100 million—and the capital associated with them—went to startups headquartered in the U.S. This amounts to about 62 transactions with a combined worth of approximately $15 billion thus far in 2026, keeping the country on schedule for a record-breaking year.
Nevertheless, mega-financings at the Series A level exhibit greater global distribution than overall venture capital investments this year. During the first half of 2026, over 75% of worldwide funding from seed through growth stages was captured by American enterprises, largely driven by massive funding events for Silicon Valley mainstays Anthropic and OpenAI.
When investors like the same things
Multiple factors beyond the expansion of AI help explain the upward trend in Series A megarounds. Most notably, top-tier startup investors maintain exceptionally deep pools of capital ready for deployment. Moreover, historical and recent exit multiples heavily favor those who pursue ambitious goals rather than modest ones.
At the Series A phase, another contributing element appears to be a stronger-than-usual consensus among investors regarding the specific industries, business models, and founding teams worthy of backing. Because paying a premium price for a winning enterprise remains preferable to securing a discounted stake in a struggling one, financiers are aggressively backing perceived frontrunners in the early stages.
Related Crunchbase queries:
- Global 2026 Series A Rounds Of $100M+
- Sample List Of Large 2026 Series A
Related reading:
- Crunchbase Data: Global Startup Investment Hit Record $510B in H1 2026 As AI Boom Accelerates Funding And Exits
Illustration: Dom Guzman
-
The dataset includes rounds that were explicitly announced as Series A rounds as well as financings that had characteristics of Series A but were not explicitly labeled by the recipient as such.↩
Frequently Asked Questions
01What is considered a jumbo Series A round?
In the context of recent market data, jumbo Series A rounds refer to early-stage financing events valued at $100 million or more, with some exceeding $500 million or even $1 billion.
02Which sector is driving the rise in large Series A rounds?
Artificial intelligence is the primary driver, accounting for more than 70% of Series A rounds valued at $100 million or more.
03Which region leads in capturing these mega early-stage deals?
U.S.-based startups capture roughly half of all Series A rounds and funding of $100 million-plus, keeping the country on track for a record year.
