Funding Rounds
Startups raise money in stages, from a few hundred thousand dollars at seed to billions for the biggest companies. Here is how rounds are named, who invests at each stage and the record-setting rounds of 2026.
The typical ladder
| Stage | Typical purpose | Typical investors |
|---|---|---|
| Pre-seed and seed | Build a first product, find early customers | Founders, friends, angels, seed funds |
| Series A | Prove the business can grow | Venture capital firms |
| Series B and C | Scale sales, hire, expand | Larger VC and growth funds |
| Late stage | Dominate a market, prepare to go public | Growth funds, corporations, sovereign funds |
Amounts vary widely by industry and era.
Instruments
Early money often comes through convertible notes or simple agreements for future equity, which turn into shares at a later priced round, usually at a discount. From Series A on, investors typically buy preferred stock, which carries extra rights such as getting their money back first if the company is sold.
The 2026 mega-rounds
Artificial intelligence companies raised the largest private rounds in history. OpenAI closed a $122 billion round on March 31, 2026, at an $852 billion valuation, including more than $3 billion from individual investors through bank channels. On May 28, 2026, Anthropic announced a $65 billion Series H at a $965 billion valuation, more than double its $380 billion valuation from February.
What each round signals
- An up round, at a higher valuation, signals progress and investor confidence.
- A flat or down round, at the same or lower valuation, signals trouble or a cooler market.
- Big rounds fund big spending; they do not guarantee success.
- Most startups never reach later rounds.
Key takeaways
- Startups raise money in stages from seed to late stage.
- Later investors usually get preferred stock with extra rights.
- AI companies raised record rounds in 2026.
- Up rounds signal progress; down rounds signal trouble.