Funding round
Horizon3.ai Series D
Horizon3.ai, which works in autonomous penetration testing services in Dover, raised $100M in a Series D round announced on 10 Jun 2025, led by New Enterprise Associates. 4 firms took part. It is Horizon3.ai's fifth venture round on record; the one before was a Series C in Aug 2023.
$100M
Amount raised
Not disclosed
Post-money valuation
4
Investors
1 lead
Valuation
What this round says about the price
Horizon3.ai did not disclose a valuation in this round; its last disclosed one was $50M at the Series A (Feb 2021). It came 22 months after Horizon3.ai's Series C. It is 23% of the $429M Horizon3.ai has raised in the venture rounds on record. Horizon3.ai raised again 14 months later: a Series E round of $250M in Aug 2026, at $2.00B post-money.
Horizon3.ai's funding rounds
Horizon3.ai has 6 venture rounds on record. This one is highlighted.
- Seed 23 Jan 2020, led by SignalFire $3.5M
- Series A 1 Feb 2021, led by SignalFire $5.0M$50M post-money
- Series B 2 Nov 2021, led by SignalFire $30M
- Series C 8 Aug 2023, led by Craft Ventures $40M
- Series D this round 10 Jun 2025, led by New Enterprise Associates $100M
- Series E 3 Aug 2026, led by NightDragon and New Enterprise Associates $250M$2.00B post-money
Investors
Who put money in
New Enterprise Associates led the round with 3 other firms.
Lead investor
- New Enterprise Associates backs 286 venture-backed companies new investor
Also in the round
- backs 121 venture-backed companies new investor
- Craft Ventures backs 197 venture-backed companies new investor
- 9Yards Capital new investor
Joined the board: Lila Tretikov (NEA).
Comparable rounds
How it compares
107 Series D rounds in Tech Companies within a year either side disclosed an amount; the median was $100M, and this round was close to the median. The closest in time, other companies' Series D rounds in Tech Companies:
| Company | Announced | Amount | Post-money | Led by |
|---|---|---|---|---|
| Tech Companies | 12 Jun 2025 | $125M | $1.25B | Cox Enterprises |
| Tech Companies | 24 Jun 2025 | $99M | $1.00B | BOND |
| Tech Companies | 12 Jun 2025 | $80M | $600M | Brighton Park Capital |
| Vanta Tech Companies | 23 Jul 2025 | $150M | $4.15B | Wellington Management |
| Tech Companies | 13 May 2025 | $120M | not disclosed | Goldman Sachs Alternatives’ Growth Equity and Smith Point Capital |
| Tech Companies | 1 May 2025 | $93M | not disclosed | Bain Capital Ventures |
| Tech Companies | 17 Jul 2025 | $80M | $800M | JMI Equity |
| Tech Companies | 30 May 2025 | $53M | not disclosed | YvY Capital |
Sources
Where this comes from
Reported by 7 sources.
Questions
Frequently asked
How much did Horizon3.ai raise in its Series D round?
Horizon3.ai raised $100M in its Series D round, announced in Jun 2025.
Who led Horizon3.ai's Series D round?
New Enterprise Associates led it, with SignalFire, Craft Ventures and 9Yards Capital.
What was Horizon3.ai's valuation at the Series D round?
It was not disclosed; its last disclosed one was $50M at the Series A (Feb 2021).
How does it compare with other Series D rounds in Tech Companies?
107 Series D rounds in Tech Companies within a year either side disclosed an amount; the median was $100M, and this round was close to the median.
Did Horizon3.ai raise again after this round?
Yes: a Series E round in Aug 2026 of $250M at $2.00B post-money.