Global startups have closed at least 114 Series A rounds of $100 million or more so far this year, with more than 70% going to AI companies, Crunchbase reported in late September. For seed founders outside that group, the record megarounds hide a contraction: U. S. startups closed only 272 Series A rounds in the third quarter. That concentration of capital at the top matters because the Series A bar keeps rising while fewer companies clear it.
Why Series A counts fell as seed checks grew
U. S. Series A volume dropped to 272 rounds in the third quarter from 377 a year earlier, a decline of about 28%, while seed volume held up better at 984 rounds against 1,059. The median U. S. seed round reached about $3 million last year, three times its 2018 level. Yet progression has stalled: only 24% of companies that raised a $1 million-plus seed in 2023 have moved past seed, and just 16% of the 2024 cohort, down from 55% or higher through 2020.
Series A investors now expect $2 million to $3 million in ARR, sometimes $4 million, according to Andy McLoughlin of Uncork Capital. The time from seed to Series A has stretched past two years, so a seed round must fund the company to that revenue mark with six months to spare. His advice is blunt: if the capital will not carry the startup to the bar, accepting a smaller round on better terms is preferable to an oversized seed that creates false comfort.
Atomic, a New York supply chain planning software company founded in 2023, shows that a bigger seed is not required. It raised a $3 million seed in April 2025, exactly at the median, led by Madrona and DVx Ventures. About 17 months later it closed a $12.5 million Series A led by Madrona and Klass Capital. Funds sized from $100 million to $500 million typically lead the Series A, so founders are advised to map which firms lead at their stage and track fund cycles.
What the higher revenue bar means for founders
For companies building or buying AI products, the practical shift is that Series A has become a go-to-market test rather than a product milestone. A team at $2 million in ARR with a sales process a new hire can operate looks stronger than one at $3 million dependent on founder-led deals nobody else can repeat. That distinction favors early investment in outbound reach, qualification, funnel discipline and hiring assessment over adding features.
The same logic changes how seed capital should be planned and which help to seek. MGV describes a first session called Sales Jumpstart that interviews founders and staff, then scores the firm on a proprietary matrix covering current position, target state and gaps in the sales machine. Follow-up workshops cover profiling, objection handling, compensation plans, deck building, storytelling and investor introductions, with mentoring alongside. Founders should verify whether such programs produce repeatable pipeline, not just pitch polish, and ask for references.
The marker to watch is the share of the 2023 and 2024 seed cohorts that advance beyond seed over the next four quarters. If the 24% and 16% conversion rates stabilize or climb while Series A counts recover from 272 per quarter, the squeeze is easing. If megarounds keep growing while conversion stays low, capital will remain concentrated in AI leaders and late-seed execution.
