Funding round
Horizon3.ai Series E
Horizon3.ai, which works in autonomous penetration testing services in Dover, raised $250M in a Series E round announced on 3 Aug 2026, led by NightDragon and New Enterprise Associates, at a $2.00B post-money valuation. 14 firms took part, 7 of them already investors. It is Horizon3.ai's sixth venture round on record; the one before was a Series D in Jun 2025.
$250M
Amount raised
$2.00B
Post-money valuation
$1.75B pre-money
14
Investors
2 leads
40x
Step-up from the Series A
$50M in Feb 2021
13%
Stake sold
new money over the post-money
Valuation
What this round says about the price
This round priced Horizon3.ai at $2.00B after the new money, 40.0 times the $50M of its Series A (Feb 2021). The $250M bought investors about 13% of the company. It came 14 months after Horizon3.ai's Series D. It is 58% of the $429M Horizon3.ai has raised in the venture rounds on record. No later venture round is on record for Horizon3.ai.
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 10 Jun 2025, led by New Enterprise Associates $100M
- Series E this round 3 Aug 2026, led by NightDragon and New Enterprise Associates $250M$2.00B post-money
Investors
Who put money in
NightDragon and New Enterprise Associates led the round with 12 other firms. NightDragon, New Enterprise Associates, Craft Ventures and Prosperity7 Ventures and 3 more had backed Horizon3.ai before.
Lead investors
- backs 21 venture-backed companies existing investor
- New Enterprise Associates backs 286 venture-backed companies existing investor
Also in the round
- backs 97 venture-backed companies new investor
- backs 27 venture-backed companies new investor
- Demeter Group new investor
- EDBI backs 67 venture-backed companies new investor
- backs 53 venture-backed companies new investor
- backs 17 venture-backed companies new investor
- Sapphire Ventures backs 148 venture-backed companies new investor
- Craft Ventures backs 197 venture-backed companies existing investor
- backs 48 venture-backed companies existing investor
- Qualcomm Ventures backs 140 venture-backed companies existing investor
- backs 44 venture-backed companies existing investor
- backs 121 venture-backed companies existing investor
Joined the board: Dave DeWalt (NightDragon) and Morgan Kyauk (NightDragon).
Use of proceeds
What the money is for
According to the announcement, the money goes to product development, geographic expansion, sales and marketing, scaling operations and working capital.
- Product development
- Geographic expansion
- Sales and marketing
- Scaling operations
- Working capital
Comparable rounds
How it compares
27 Series E rounds in Tech Companies within a year either side disclosed an amount; the median was $203M, and this round was 1.2 times the median. The closest in time, other companies' Series E rounds in Tech Companies:
| Company | Announced | Amount | Post-money | Led by |
|---|---|---|---|---|
| Temporal Tech Companies | 14 Sep 2026 | $550M | $12.55B | Lightspeed Venture Partners and Wellington Management |
| Tech Companies | 2 Sep 2026 | $54M | not disclosed | Kathy Ireland |
| Tech Companies | 12 Sep 2026 | $17M | not disclosed | Global Brain |
| Legora Tech Companies | 21 Oct 2026 | $550M | $8.80B | Atreides Management |
| Tech Companies | 21 Oct 2026 | $250M | $2.30B | Scaleup Europe Fund |
| Tech Companies | 6 Oct 2026 | $120M | $1.90B | Citi |
| Tech Companies | 14 Oct 2026 | $100M | not disclosed | Infinitum Partners |
| Tech Companies | 14 Oct 2026 | $90M | not disclosed | Healthier Capital and Crosslink Capital |
Sources
Where this comes from
Reported by 6 sources.
Questions
Frequently asked
How much did Horizon3.ai raise in its Series E round?
Horizon3.ai raised $250M in its Series E round, announced in Aug 2026.
Who led Horizon3.ai's Series E round?
NightDragon and New Enterprise Associates led it, with Acrew Capital, Blue Cloud Ventures, Demeter Group, EDBI and PSG and 7 more.
What was Horizon3.ai's valuation at the Series E round?
$2.00B post-money ($1.75B pre-money).
How does it compare with other Series E rounds in Tech Companies?
27 Series E rounds in Tech Companies within a year either side disclosed an amount; the median was $203M, and this round was 1.2 times the median.