Solestial
Techstars '19Tempe, US · Founded 2019 · Delaware corporation · 6 known investors
Solestial develops and manufactures radiation-hardened silicon solar power modules for satellites and space applications. The company serves commercial and government customers requiring power solutions for large satellite constellations and space infrastructure.
CleantechDeep TechEnergyHardwareSpace Tech
Founders & leadership
Solestial was founded in 2019 by Stan Herasimenka, Mikhail Reginevich, and Andrew Atherton.
SH
Stan HerasimenkainCTO and Co-Founder
MR
Mikhail ReginevichinChief Engineer, Tooling and R&D; and Co-Founder
AA
Andrew AthertonCo-founder
Board
BJ
Beckett JacksonBoard director
MC
Mathieu CostesBoard director
Investors · 6
.jpeg){kind=logo}
Reported raises · per SEC filings
Form D private placements$26.2M disclosed across 2 rounds · 2022–2024
▶$15.1MraisedSep 2024 · 12 investors · OtherRule 506(b)
▶$15.1MraisedSep 2024 · 12 investors · Other
Rule 506(b)Officers, directors & promoters on the filing
- Beckett JacksonDirector
- Mathieu CostesDirector
- Mikhail ReginevichExecutive Officer
- Stanislau HerasimenkaExecutive Officer, Director, Promoter
- Andrew AthertonExecutive Officer, Director, Promoter
- Offering amount
- $21.9M
- Amount sold
- $15.1M
- First sale
- Sep 2024
- Incorporated
- Corporation, Delaware, 2019
- Federal exemptions
- 06b
▶$11.2MraisedOct 2022 · 32 investors · OtherRule 506(b)
▶$11.2MraisedOct 2022 · 32 investors · Other
Rule 506(b)Officers, directors & promoters on the filing
- Stanislau HerasimenkaExecutive Officer, Director, Promoter
- Andrew AthertonExecutive Officer, Director
- Mikhail ReginevichExecutive Officer
- Mathieu CostesDirector
- Offering amount
- $11.2M
- Amount sold
- $11.2M
- First sale
- Sep 2022
- Incorporated
- Corporation, Delaware, 2019
- Federal exemptions
- 06b
Source: SEC EDGAR Form D. Amounts as filed; amended filings shown once at their latest values.
Competitors · 3
by search overlapEnergySage68 shared keywordsEnergySage operates an online marketplace where consumers and businesses can compare and shop for clean energy products such as solar panels, battery backup power, heating and cooling systems, electric vehicles, and smart home technology. The platform also offers clean energy financing and publishes market reports like its Solar & Storage Marketplace Report.
Space35 shared keywordsSpace.com is a media outlet that publishes space and astronomy news, expert commentary, and live event coverage such as eclipse reporting. It serves a general audience of space enthusiasts and readers.
Interestingengineering34 shared keywordsInteresting Engineering is an online media publication covering news and analysis on engineering, science, and technology topics including nuclear energy, semiconductors, robotics, quantum computing, and defense. It offers articles, columns, case studies, and research along with a subscription for ad-free access.
Companies competing with Solestial for the same Google search keywords, organic and paid, via search-intersection analysis.
Non-dilutive funding · 9 SBIR/STTR awards
Federal grants — no equity taken| Agency | Phase | Year | Amount |
|---|---|---|---|
| NASA | Phase II | 2023 | $850K |
| NASA | Phase I | 2023 | $150K |
| U.S. Air ForceAir Force | Phase I | 2023 | $70.9K |
| NASA | Phase II | 2022 | $749.9K |
| National Science Foundation | Phase II | 2021 | $999.8K |
| NASA | Phase I | 2021 | $125K |
| National Science Foundation | Phase I | 2019 | $224.8K |
| NASA | Phase I | 2019 | $124.7K |
| U.S. Air ForceAir Force | Phase I | 2018 | $150K |
Source: SBIR.gov award data (U.S. Small Business Administration). SBIR/STTR awards are competitive federal R&D grants and contracts — non-dilutive capital alongside any venture rounds above.
In the news
The Weekly Notable Startup Funding Report: 7/6/26 – AlleyWatchalleywatch.com · Jul 2026Frequently asked questions
- What does Solestial do?
- Solestial develops and manufactures radiation-hardened silicon solar power modules for satellites and space applications. The company serves commercial and government customers requiring power solutions for large satellite constellations and space infrastructure.
- Who founded Solestial?
- Solestial was founded by Stan Herasimenka, Mikhail Reginevich, Andrew Atherton in 2019.
- Who are Solestial's investors?
- Solestial's investors include Boeing HorizonX Ventures, Crosscut Ventures, Global Brain, Industrious Ventures, Techstars, Silent Ventures.
- How much funding has Solestial raised?
- Solestial has disclosed $26.2M raised across 2 rounds.
- Where is Solestial headquartered?
- Solestial is headquartered in Tempe, US.