About Fathom Fund
Fathom Fund is a venture capital firm founded in 2022. It is primarily based out of Houston, United States. As of May 2026, Fathom Fund is an active investor, having invested in 8 companies, with 3 new investments in the last 12 months. It primarily invests in Series A round in United States based startups. Its investments are spread across a wide range of sectors from High Tech to Enterprise Applications and Aerospace, Maritime and Defense Tech. Most recently it participated in the $***** Series A round of Observable Space Overall, Fathom Fund portfolio has seen 1 unicorn, namely Epirus. A lot of funds co-invest with Fathom Fund, with names like IAG Capital Partners sharing a substantial percentage of its portfolio. Fathom Fund has team of 2 people including 2 partners.Key Metrics
Team Members
Portfolio Count
Portfolio Sectors
Portfolio Locations
Rounds of Entry
Series A, Seed & 1 more
Portfolio Unicorns
Portfolio Soonicorns
Deals in last 12 months
Fathom Fund's List of Top Investments
Fathom Fund has a portfolio of 8 companies, one of which is a Unicorn. Their most notable investments are in Resource Chemical and Novolinc.Their portfolio spans across United States and Australia. They have invested in High Tech, Enterprise Applications, Aerospace, Maritime and Defense Tech and 6 other sectors, across stages such as Series A, Seed and 1 more. Here is the list of top investments by Fathom Fund:1. Epirus
Developer of high-power microwave systems for electronic warfare and air defense. The company combines solid-state, long-pulse high-power microwave systems with artificial intelligence and advanced electronics. It offers systems for layered short-range air defense and maneuver short-range defense. The company also provides testing and validation for electronic effects on long-range targets. It develops capabilities to defend high-value assets and provides compact electronic warfare. The company delivers air domain awareness using perception capabilities.
Key facts about Epirus
- Founded Year: 2017
- Location: Los Angeles (United States)
- Valuation: $*****
- Stage: Series D
- Total Funding till date: $595M
- Employee Count: 246 as on May 31, 2026
- Investors: T. Rowe Price, Greenspring Associates and 33 Others
- Latest Funding Round: Series D, Oct 09, 2025, $*****
- Highlight: Editors' Pick
Developer of photonic chips for high speed connections in data centers and performance computing systems. The company's chips connect various computing elements by using photonics to reduce power consumption, enabling businesses and research institutions with faster, more energy-efficient data processing.
Key facts about Xscape Photonics
- Founded Year: 2022
- Location: New York City (United States)
- Stage: Series A
- Total Funding till date: $95M
- Employee Count: 55 as on May 31, 2026
- Investors: Cisco Investments, Nvidia and 8 Others
- Latest Funding Round: Series A, Mar 11, 2026, $*****
- Highlight: Editors' Pick
3. ElectraLith
Developer of direct lithium extraction and refining technology using renewable energy. The company provides a technology that extracts and refines battery-grade lithium hydroxide. This single-step, scalable, and modular process requires no water or chemicals and is powered by renewable energy.
Key facts about ElectraLith
- Founded Year: 2021
- Location: Melbourne (Australia)
- Stage: Series A
- Total Funding till date: $17M
- Employee Count: 25 as on May 31, 2026
- Investors: In-Q-Tel, Investible and 12 Others
- Latest Funding Round: Series A, Jan 15, 2025, $*****
- Highlight: Editors' Pick
4. Nullspace
Delivers engineering simulation software for electromagnetic and electrostatic applications. Its software leverages a Python interface for the customization of workflow for automation and flexible integration into the environment. It is used for quantum computing applications and workflow optimization.
Key facts about Nullspace
- Founded Year: 2022
- Location: Irvine (United States)
- Stage: Seed
- Total Funding till date: $2.5M
- Employee Count: 17 as on May 31, 2026
- Investors: Golden Seeds, SummitSpark Partners and 1 Other
- Latest Funding Round: Seed, Aug 19, 2025, $*****
5. Novolinc
Developer of nanocomposite thermal interface materials for high-power electronic systems. It addresses the increasing thermal demands of electronic chipsets by offering solutions that reduce thermal resistance. The company's materials are customizable, reliable, and designed for scalable manufacturing, ensuring optimal performance and reliability in high-power systems. The materials offer excellent surface conformability and enable thermal bonding of substrates.
Key facts about Novolinc
- Location: Pittsburgh (United States)
- Stage: Series A
- Total Funding till date: $10.2M
- Investors: M Ventures, TDK Ventures and 4 Others
- Latest Funding Round: Series A, Dec 08, 2025, $*****
Fathom Fund's Year-on-Year Investment Trends
In 2025, it made 5 investments, while as of May 2026, it has made 1 investment in this year. Its most recent first time investment was in Observable Space.Year | No. of Investments | ||
|---|---|---|---|
1st Round | Follow-on | Total | |
2026 (YTD) | 1 | 0 | 1 |
2025 | 5 | 0 | 5 |
2024 | 1 | 0 | 1 |
Fathom Fund's Investments by Stage
Fathom Fund has made 4 investments in Series A stage with an average round size of $40.3M, 2 investments in Seed stage with an average round size of $14.8M and 1 investment in Series B stage with an average round size of $15M.Stage of entry | No. of Investments |
|---|---|
Series A | 4 |
Seed | 2 |
Series B | 1 |
Note: We have considered here, only first round of investments
Fathom Fund's Investments by Sector
Fathom Fund has a diverse portfolio, with companies operating in the High Tech, Enterprise Applications, Industrial Goods and Manufacturing, Semiconductors and Aerospace, Maritime and Defense Tech. Notably, it has invested in 7 Enterprise (B2B) companies, 7 Tech companies, 4 Tech hardware companies and at least 3 companies focusing on Software.Sector | No. of Investments |
|---|---|
High Tech | 4 |
Enterprise Applications | 3 |
Industrial Goods and Manufacturing | 2 |
Semiconductors | 2 |
Aerospace, Maritime and Defense Tech | 1 |
Others | 4 |
Note: We have considered here, only first round of investments
Fathom Fund's Investments by Geography
Fathom Fund has made most investments in United States (6), followed by Australia where it has made 1 investment.Country | No. of Investments |
|---|---|
United States | 6 |
Australia | 1 |
Note: We have considered here, only first round of investments
Fathom Fund's recent investments
Fathom Fund has made 1 investments in 2026 so far - Observable Space.Here are the most recent investments by Fathom Fund:
Filter this listDate | Company | Location | Round Details | Round Amount | Co-Investors |
|---|---|---|---|---|---|
May 28, 2026 | United States | Series A | 5237 | [+6] | |
Dec 08, 2025 | United States | Series A | 9506 | [+4] | |
Aug 19, 2025 | United States | Seed | 7313 | ||
May 14, 2025 | United States | Seed | 5053 | [+15] | |
Mar 10, 2025 | United States | Series B | 2596 | [+3] |
Unicorns in Fathom Fund's Portfolio
Fathom Fund has 1 unicorn in its portfolio - Epirus. The most recent unicorn in their portfolio is Epirus which became a unicorn in 2022, 4 years before Fathom Fund first invested in it.Here is a list of unicorns in Fathom Fund's portfolio:
Tracxn Score | Company | Short Description | Founded year | Sector | Location | Company Stage | First Investment/ Acquisition Details |
|---|---|---|---|---|---|---|---|
69 | Developer of high-power microwave systems for electronic warfare and air defense | 2017 | Los Angeles | Series D | vzdpqqs |
Team profile of Fathom Fund
Fathom Fund has a team of 2 members including 2 Partners located in United States. Fathom Fund's team does not sit on the board of any company as of now.Co-investors of Fathom Fund
Over the past 2 years, 58 investors have co-invested in Fathom Fund's portfolio companies. This includes funds and angels.
- Invested before Fathom Fund: Altair, SummitSpark Partners and 2 others have invested in rounds before Fathom Fund. There is 1 company where Altair has invested before Fathom Fund and 1 company where SummitSpark Partners has invested before Fathom Fund.
- Top Co-investors of Fathom Fund: 52 investors entered a company along with Fathom Fund. These include investors like IAG Capital Partners (1 company).
- Invested after Fathom Fund: Addition (1 company) and OSTI (1 company) are the investors which have invested in Fathom Fund's portfolio after their investments.
Recent News related to Fathom Fund
•
NovoLINC Secures Funding to Advance Thermal Tech for AI ChipsPR Newswire•Dec 18, 2025•Foothill Ventures, Carnegie Mellon University, Fathom Fund, Hitachi Ventures and 3 others
•
Nullspace Secures $2.5M Seed Round for RF and Quantum Simulation SoftwarePR Newswire•Aug 19, 2025•Fathom Fund, Nullspace, Golden Seeds
•
Persona AI Secures $27 Million in Pre-Seed Funding for Humanoid Robotsintelligence360•May 23, 2025•Persona Technologies, Unity Growth Fund, Tides Ventures, Mirae Asset and 13 others
•
Persona AI Secures $27M Pre-Seed Funding for Humanoid RobotsFinSMEs•May 14, 2025•, Mirae Asset, Invicta Growth, Fathom Fund and 12 others
•
ReSource Chemical Raises $15M in FundingFinSMEs•Mar 10, 2025•Resource Chemical, Khosla Ventures, Fathom Fund, Chevron and 1 other
•
Monash spinout raises $27.5m for cleaner lithium productionInnovationAus.com•Jan 16, 2025•ElectraLith, Main Sequence, Chevron, Fathom Fund and 2 others
•
Xscape Photonics: $44 Million (Series A) Raised To Support Next-Generation AI Data CentersPulse 2.0•Oct 29, 2024•Xscape Photonics, IAG Capital Partners, Altair, Cisco Investments and 4 others
•
Xscape Photonics: $44 Million (Series A) Raised For Supporting Next Generation Of AI Data CentersPulse 2.0•Oct 20, 2024•Xscape Photonics, Oxford University Press, Nvidia, Life Extension Ventures and 4 others
•
Developing laser -based chip connections, Xscape Photonics received an investment of $ 44 millionWebrazzi•Oct 16, 2024•Xscape Photonics, Cisco, Nvidia, Altair and 6 others
