Funding round
United Solar Series B
United Solar, which works in polysilicon manufacturing in Oman, raised $30M in a Series B round announced on 22 Dec 2025, led by Waaree Solar Americas Inc.. 1 firm took part. It is United Solar's first venture round on record.
$30M
Amount raised
Not disclosed
Post-money valuation
1
Investors
1 lead
Valuation
What this round says about the price
United Solar did not disclose a valuation in this round. It is United Solar's first venture round on record, 2 years after it was founded in 2023. It is 1.2% of the $2.53B United Solar has raised in the venture rounds on record. United Solar raised again 1 month later: a Growth round of $900M in Jan 2026.
Investors
Who put money in
Waaree Solar Americas Inc. led the round.
Lead investor
- Waaree Solar Americas Inc. new investor
Use of proceeds
What the money is for
According to the announcement, the money goes to scaling operations.
- Scaling operations
Comparable rounds
How it compares
18 Series B rounds in Chemicals within a year either side disclosed an amount; the median was $24M, and this round was 1.3 times the median. The closest in time, other companies' Series B rounds in Chemicals:
| Company | Announced | Amount | Post-money | Led by |
|---|---|---|---|---|
| Chemicals | 21 Oct 2025 | $50M | not disclosed | Wing Venture Capital and Insight Partners |
| Chemicals | 10 Sep 2025 | $50M | not disclosed | World Fund and Khosla Ventures |
| Chemicals | 29 Sep 2025 | $28M | not disclosed | not named |
| Chemicals | 1 Jul 2025 | $18M | not disclosed | Inter IKEA Group |
| Chemicals | 5 May 2026 | $13M | not disclosed | HS Hyosung Advanced Materials |
| Chemicals | 17 Jun 2026 | $20M | not disclosed | Invest-NL and Maersk |
| Chemicals | 7 Jul 2026 | $100M | not disclosed | not named |
| Chemicals | 30 Jul 2026 | $55M | not disclosed | Treehouse Family Capital |
Sources
Where this comes from
Reported by 4 sources.
Questions
Frequently asked
How much did United Solar raise in its Series B round?
United Solar raised $30M in its Series B round, announced in Dec 2025.
Who led United Solar's Series B round?
Waaree Solar Americas Inc. led it.
What was United Solar's valuation at the Series B round?
It was not disclosed.
How does it compare with other Series B rounds in Chemicals?
18 Series B rounds in Chemicals within a year either side disclosed an amount; the median was $24M, and this round was 1.3 times the median.
Did United Solar raise again after this round?
Yes: a Growth round in Jan 2026 of $900M.