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Washington Harbour Partners

Activity from announced rounds

All recorded activity

Washington Harbour Partners invests in technology businesses addressing US economic and national-security needs, including space, autonomous systems, cybersecurity, energy and the industrial base.

Its focus is on commercial technologies that fill specific mission gaps for government and enterprise customers. The investment team works alongside operating partners and advisers with experience in these sectors.

The firm emphasises access to end customers and understanding how the technology will be used. That is particularly relevant for founders whose route to scale depends on government procurement, defence requirements or deployment within critical infrastructure.

Sources
Rounds participated in
16
Confirmed lead rounds
1
13 roles undisclosed
New companies
14
First participation on record · 2 follow-on
Funding in participating rounds
$4.4B
15 disclosed · full round size, not this investor’s share

By stage

Series A5
Series C+5
Series B4
Seed1
Undisclosed1

By primary sector

Space tech8
Defense tech5
Climate tech1
Developer tools1
Industrial tech1

By country

United States16

Rounds

16 in all activity
Stoke Space Technologies

Stoke Space develops Nova rockets with reusable first and second stages for commercial and government launch customers.

$1BSeries E initial closing
Participant
Hadrian

Builds highly automated factories producing defense and aerospace systems

$1.4BSeries D
Lead
Mariana Minerals

Builds and operates AI-driven mines and refineries for critical minerals

$310MSeries B
Role not disclosed
Array Labs

Building a new way to understand the physical world

$21MStrategic
Role not disclosed
Apex

Apex manufactures configurable satellite platforms and provides mission services for commercial and national-security space programs.

>$200MSeries E
Role not disclosed
NinjaOne

Provides a unified IT operations platform for simplifying work

$400MSeries C
Role not disclosed
Scout Space

Builds platform-agnostic in-space sensors and software to detect, track, and characterize orbital objects for SDA missions

$18MSeries A
Role not disclosed
ANELLO Photonics

ANELLO Photonics makes silicon-photonics gyroscopes and inertial navigation systems for vehicles operating where GPS is unreliable or unavailable.

$25MSeries B-2
Participant
Firestorm Labs

Develops containerized manufacturing platform for drone systems

$82MSeries B
Role not disclosed
Turion Space

Delivers space superiority via integrated spacecraft, sensors, and software for orbital intelligence

$75MSeries B
Role not disclosed
Citra Space

Develops space object identification and characterization technology

$15MSeries A
Role not disclosed
Worldscape.ai

Provides AI-native geospatial intelligence software for defense and enterprise applications

$6MSeed
Role not disclosed
Smack Technologies

Frontier AI lab building domain-specific decision-making models for the military

$32MSeries A
Role not disclosed
Stoke Space Technologies

Stoke Space develops Nova rockets with reusable first and second stages for commercial and government launch customers.

$860MSeries D
Role not disclosed
Standard Nuclear

Produces TRISO nuclear fuel for advanced nuclear reactors

$140MSeries A
Role not disclosed
Array Labs

Building a new way to understand the physical world

$20MSeries A
Role not disclosed