Series D funding is a later-stage equity round beyond Series C, raised by a mature growth-stage company. It is raised either to fuel continued aggressive growth (the "rocket" story) or to navigate a specific situation such as a delayed exit, market pressure, or extended private timeline (the "buying time" story). The round size, terms, and narrative make the difference between the two readings. By this stage, the company is no longer proving viability; it's a mature [Scale-Up] managing longevity, market defense, and the path to liquidity.
The 2025 benchmarks (Carta and PitchBook):
| Metric | 2025 typical range | Notes |
|---|---|---|
| Round size | $100M-$300M (median ~$150M) | Mega-rounds at $500M+ exist |
| Post-money valuation | $1B-$3B (unicorn... |