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Third Sphere — Portfolio

Investor actively backing innovative startups and growth-stage companies across various industries and funding rounds.

99
Companies
$456.5M
Total invested
$5.4M
Avg. check
68
Industries
Manufacturing 5Robotics 4Infrastructure 3Energy 3Hardware 3CleanTech 3+62 more
Founder contacts

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Portfolio companies

Showing 124 of 99
EVA
September 2022

EVA develops drone charging infrastructure to facilitate drone applications all across the globe.

Aerospace · BrooklynGrant
Photon Marine
September 2024

Photon Marine is building the world’s most powerful and intelligent electric outboard motor system tailored to commercial boat fleets.

Clean Energy · PortlandGrant
Partsimony
September 2023

Your manufacturing supply chain superpower in a world of uncertainty.

B2B · New YorkSeed
Urbio
August 2023

Urbio is a software that accelerates the transition of utilities towards clean energy.

Artificial Intelligence (AI) · SionGrant
Applied Carbon
August 2024

Applied Carbon, a technology business developing automated biochar production technologies.

Artificial Intelligence (AI) · Houston$1.1M Grant
Wright Electric
August 2024

Wright Electric is a leader in the future of sustainable, lower emissions air travel.

Aerospace · AlbanyGrant
Metalmark Innovations
July 2023

Metalmark creates nanostructured materials that destroy airborne pollutants and toxins to support healthy indoor air quality.

Health Care · BostonNon-equity Assistance
ChargeLab
July 2026

ChargeLab develops software for managing electric vehicle charging infrastructure across various environments.

Automotive · Toronto$400K Grant
ClearRoad
July 2021

ClearRoad enables Stripe-for-Tolling, leveraging in-vehicle tech & data for next-generation pricing of the road.

Autonomous Vehicles · Brooklyn$2.4M Seed
SOS
June 2023

SOS is transforming access to health and wellness on the go through a network of smart vending machines.

Beauty · Boston$7.6M Series A
Singularity Energy
May 2022

Singularity Energy uses real-time carbon data to make better energy decisions.

Clean Energy · Somerville$4.5M Seed
Focal
May 2023

Personalized electric heating systems for restaurants and outdoor spaces—reducing costs and improving guest comfort.

Heating · San Francisco$4.0M Pre-Seed
Miles
May 2022

Miles is a startup that offers rewards for traveling, regardless of the mode of transportation.

Apps · Redwood CitySeries B
Sention Technologies
April 2026

Sention Technologies is a battery cell intelligence firm that uses advanced diagnostic techniques and machine learning.

Battery · London$806K Grant
Wasted*
April 2026

Wasted* is a waste management company that provides eco-friendly portable toilets and restroom trailers for recycling and waste disposal.

Environmental Consulting · Williston$3.2M Venture - Series Unknown
Phuc Labs
April 2023

Phuc Labs implements robotics to automate the method of identifying, separating, and reclaiming particles from water.

Recycling · BostonSeed
Oonee
April 2024

Oonee builds, finances, and operates automated bike parking infrastructure that humanizes public spaces.

CleanTech · Brooklyn$146K Equity Crowdfunding
Dorothy
April 2025

Dorothy uses data and AI to quickly identify storm-damaged properties

Apps · New York$650K Undisclosed
Shellworks
March 2026

Shellworks is a biomaterials company that develops and manufactures materials that offers alternative to conventional plastics.

Biotechnology · London$15.0M Series A
Flair
March 2026

Flair makes smart vents and wireless thermostats and advanced software for residential heating and cooling.

Energy Management · Berkeley$5.7M Series B
Loamist
February 2024

Loamist operates as a climate-tech startup.

Environmental Consulting · Berkeley$1.0M Pre-Seed
Swellcycle
February 2025

Swellcycle manufactures board cores, artboards, and 3D printed sculptures.

3D Printing · Santa Cruz$1.0M Pre-Seed
Toggle
February 2023

Toggle is a construction company.

Building Material · Bohemia$3.0M Series A
Kiwibot
October 2025

Kiwibot designs and manufactures a fleet of mobile robots used for food delivery on college campuses.

Delivery · Berkeley$6.8M Venture - Series Unknown

Where Third Sphere invests

Manufacturing5
Robotics4
Infrastructure3
Energy3
Hardware3
CleanTech3

About Third Sphere's portfolio

How many companies has Third Sphere invested in?

Third Sphere has invested in 99 companies tracked in our database. The portfolio spans multiple industries and funding stages, from seed-stage startups to late-stage companies.

What industries does Third Sphere invest in?

Third Sphere's top investment sectors include Manufacturing, Robotics, Infrastructure, Energy, Hardware. The firm invests across 68 different industry categories.

What is Third Sphere's largest investment?

Among tracked funding rounds, Shellworks received $15.0M in a Series A round. Third Sphere's total known invested capital is $456.5M.

What is the average investment size for Third Sphere?

Third Sphere's average investment size is $5.4M across its portfolio of 99 companies.

What are Third Sphere's most recent investments?

Recent Third Sphere portfolio additions include EVA, Photon Marine, Partsimony, Urbio, Applied Carbon. These companies were founded in 2020 or later.

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