Funding round
SandboxAQ Series E
SandboxAQ, which works in AI and quantum technology solutions development in Palo Alto, raised $450M in a Series E round announced on 4 Apr 2025. 11 firms took part. It is SandboxAQ's second venture round on record; the one before was a Growth in Dec 2024.
$450M
Amount raised
Not disclosed
Post-money valuation
11
Investors
no lead named
Valuation
What this round says about the price
SandboxAQ did not disclose a valuation in this round; its last disclosed one was $5.60B at the Growth (Dec 2024). It came 4 months after SandboxAQ's Growth. It is 60% of the $750M SandboxAQ has raised in the venture rounds on record. No later venture round is on record for SandboxAQ.
SandboxAQ's funding rounds
SandboxAQ has 2 venture rounds on record and 1 other deal. This one is highlighted.
- Growth 18 Dec 2024 $300M$5.60B post-money
- Series E this round 4 Apr 2025 $450M
- Grant not a venture round 17 Jun 2026, led by U.S. Department of Commerce $500M
Investors
Who put money in
11 firms took part; no lead investor was named.
Investors
- Ray Dalio new investor
- Horizon Kinetics new investor
- BNP Paribas new investor
- GV backs 428 venture-backed companies new investor
- NVIDIA new investor
- Breyer Capital backs 85 venture-backed companies new investor
- Alger new investor
- backs 48 venture-backed companies new investor
- S32 new investor
- TIME Ventures new investor
- T. Rowe Price Associates, Inc. new investor
Comparable rounds
How it compares
The closest in time: 2 in Software Development Services, then Series E rounds in any sector within 6 months:
| Company | Announced | Amount | Post-money | Led by |
|---|---|---|---|---|
| Deel Software Development Services | 20 Oct 2025 | $300M | $17.30B | Ribbit and Andreessen Horowitz |
| Baseten Software Development Services | 23 Jan 2026 | $300M | $5.00B | Institutional Venture Partners and CapitalG |
| ThreatLocker Tech Companies | 10 Apr 2025 | $60M | $1.20B | not named |
| Electronical Components Manufacturing | 2 Apr 2025 | $22M | $110M | 57 Stars |
| Book Publisher | 3 Apr 2025 | $20M | $100M | Jungle Ventures |
| Anthropic Tech Companies | 3 Mar 2025 | $3.50B | $61.50B | Lightspeed Venture Partners |
| Perplexity Tech Companies | 14 May 2025 | $500M | $14.00B | Accel |
| Ualá Money Transfer | 20 Mar 2025 | $366M | $2.75B | Allianz X |
Sources
Where this comes from
Reported by 2 sources.
Questions
Frequently asked
How much did SandboxAQ raise in its Series E round?
SandboxAQ raised $450M in its Series E round, announced in Apr 2025.
Which investors took part in SandboxAQ's Series E round?
Ray Dalio, Horizon Kinetics, BNP Paribas, GV, NVIDIA and Breyer Capital and 5 more.
What was SandboxAQ's valuation at the Series E round?
It was not disclosed; its last disclosed one was $5.60B at the Growth (Dec 2024).