AI deals in September 2025: 3 funding rounds and acquisitions, $3.1B disclosed

AI deals in September 2025: 3 funding rounds and acquisitions, $3.1B disclosed · Lounge.ai

Combined

$68.6B

companies

Largest

$61.5B

this month

Median

$54.4B

multiple

Updated

$47.2B

today

#	Company	Round	Valuation	Date
1	Northwind AIFoundation models	$5.5B	$75.5B	Oct 1
2	Halcyon LabsAI coding	$5.0B	$68.3B	Oct 2
3	QuarryInference	$4.6B	$61.0B	Oct 3
4	BrightlineRobotics	$4.1B	$53.8B	Oct 4
5	Meridian ComputeFoundation models	$3.6B	$46.5B	Oct 5
6	TessellateAI coding	$3.1B	$39.3B	Oct 6
7	IronwoodInference	$2.6B	$32.0B	Oct 7
8	ParallaxRobotics	$2.1B	$24.8B	Oct 8
9	Cobalt SystemsFoundation models	$1.7B	$17.5B	Oct 9
10	Lumen RoboticsAI coding	$1.2B	$10.3B	Oct 10
11	FathomInference	$690M	$3.0B	Oct 11
12	Verge AnalyticsRobotics	$207M	$85.3B	Oct 12

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