Funding round
TerraPower Growth
Reported as "Growth Equity"
TerraPower, which works in advanced reactor design and development in Bellevue, raised $650M in a Growth round announced on 18 Jun 2025, led by NVentures. 3 firms took part, 2 of them already investors. It is TerraPower's third venture round on record; the one before was a Growth in Nov 2022.
$650M
Amount raised
Not disclosed
Post-money valuation
3
Investors
1 lead
Valuation
What this round says about the price
TerraPower did not disclose a valuation in this round. It came 31 months after TerraPower's Growth. It is 43% of the $1.51B TerraPower has raised in the venture rounds on record. No later venture round is on record for TerraPower.
Investors
Who put money in
NVentures led the round with 2 other firms. HD Hyundai and Breakthrough Energy had backed TerraPower before.
Lead investor
- NVentures new investor
Also in the round
- HD Hyundai existing investor
- Breakthrough Energy backs 113 venture-backed companies existing investor
Use of proceeds
What the money is for
According to the announcement, the money goes to product development and scaling operations.
- Product development
- Scaling operations
Comparable rounds
How it compares
23 Growth rounds in Renewable energy companies within a year either side disclosed an amount; the median was $101M, and this round was 6.5 times the median. The closest in time, other companies' Growth rounds in Renewable energy companies:
| Company | Announced | Amount | Post-money | Led by |
|---|---|---|---|---|
| Renewable energy companies | 2 Jun 2025 | $150M | not disclosed | New Enterprise Associates |
| Renewable energy companies | 3 Jun 2025 | $101M | not disclosed | Canada Growth Fund |
| Renewable energy companies | 1 Jul 2025 | $38M | not disclosed | 92 Capital |
| Renewable energy companies | 17 Jul 2025 | $27M | not disclosed | At One Ventures and Supernova Invest |
| Renewable energy companies | 22 Apr 2025 | $50M | not disclosed | Ember Infrastructure |
| Renewable energy companies | 9 Sep 2025 | $200M | not disclosed | Magnetar Capital |
| Renewable energy companies | 28 Mar 2025 | $54M | not disclosed | not named |
| Renewable energy companies | 10 Mar 2025 | $40M | not disclosed | not named |
Sources
Where this comes from
Reported by 6 sources.
Questions
Frequently asked
How much did TerraPower raise in its Growth round?
TerraPower raised $650M in its Growth round, announced in Jun 2025.
Who led TerraPower's Growth round?
NVentures led it, with HD Hyundai and Breakthrough Energy.
What was TerraPower's valuation at the Growth round?
It was not disclosed.
How does it compare with other Growth rounds in Renewable energy companies?
23 Growth rounds in Renewable energy companies within a year either side disclosed an amount; the median was $101M, and this round was 6.5 times the median.