Modular Nuclear Reactor (SMR) Developers: 37 SMR, Microreactor and Advanced Reactor Developers with Design, Type, Capacity and NRC/ONR Status (Partial List, Sources Linked)
37 organisations developing small modular reactors, microreactors or other advanced reactor designs, one row per developer (US 18, plus developers in the UK, Italy, Finland, Sweden, Denmark, France and Argentina). Each row gives the design name(s), reactor type and capacity exactly as the source states them, the US NRC status (pre-application, construction permit application, construction permit, standard design approval) with dates and docket numbers, the UK ONR Generic Design Assessment step where applicable, US DOE awards (Reactor Pilot Program, ARDP, Gen III+ SMR), up to three announced deployments, the website, and the source URLs with the exact wording relied on. 30 rows carry an NRC status, 3 a UK GDA status, 17 a DOE selection or award, and 10 a stock listing checked against the SEC company record. Built from NRC and DOE pages (US federal), SEC filings, UK ONR pages and reports, and developers' own websites, read on 2026-10-12. No single official list of SMR developers exists; this is not a complete list (excluded candidates and reasons are listed).
Data Preview
* The first 5 rows of the full list (real data).| developer_name | hq_country | listing | design_name | reactor_type | stated_capacity |
|---|---|---|---|---|---|
| Aalo Atomics, Inc. | not stated in sources used | not stated in source used | Aalo-1 (Idaho Nuclear Project: one unit of seven Aalo-1 microreactors) | microreactor | not stated in sources used |
| Advanced Energy Bridge (AEB) | not stated in sources used | not stated in source used | Nuclear Vault System (NVS) | not stated in sources used | not stated in sources used |
| Antares Nuclear, Inc. | United States (Los Angeles, CA) | not stated in source used | not stated in sources used (kilowatt-class microreactor) | microreactor | kilowatt-class (no figure stated) |
| Apollo Atomics, Inc. | United States (Cambridge, MA) | not stated in source used | not stated in sources used | not stated in sources used | 1 MW demonstrator (2027) and 10 MW commercial pilot capacity, as stated by the company (MW basis not specified) |
| ARC Clean Technology | not stated in sources used | not stated in source used | ARC-100 | sodium-cooled fast reactor (SFR) | not stated in sources used |
Showing 6 of 13 columns. All columns are listed below.
Full list: 37 rows · CSV · last verified Oct 12, 2026
* One-time payment via Stripe · Organization info only · No change-of-mind refunds (digital product)
Where the source data is published
Everything here can be read free of charge: NRC pages (nrc.gov), DOE pages (energy.gov), SEC filings on EDGAR, UK ONR pages and reports (onr.org.uk), and the developers' web pages cited. URLs are in every row. ReqoData's work is finding each developer across 79 documents, separating developers from utilities and site applicants, keeping type and capacity in the source's own words, checking listings against the SEC record, and keeping the exact wording beside each row.
Read the full noteAbout this list
- Rows
- 37
- Columns
- 13
- Format
- CSV (UTF-8, opens in Excel)
- Last verified
- Oct 12, 2026
Source data as of
NRC pre-application and application pages (last updated 2026-09-14 to 2026-10-06); DOE press releases and pages (2020-12 to 2025-12); SEC filings (Forms 10-Q for Q2 2026, Terrestrial 10-K for 2025, newcleo F-1 filed 2026-10-06); UK ONR GDA pages and news (to 2026-03-31) and the Rolls-Royce SMR Step 2 summary report; developer web pages; all read on 2026-10-12
Last verified is the date we fetched the source data and confirmed it was the latest version the publishers had released.
What this list adds to the free source data
- One row per developer across regulators: the NRC pre-application page, the developer's own NRC application page (construction permit, standard design approval), the UK ONR GDA page and DOE award announcements are joined in one row, with dates and docket numbers.
- Reactor type and capacity are kept exactly as the regulator or developer states them, with the unit (MWe, MWt, MW); each was taken only from a line that itself contains the type or number, never from a category heading.
- Listings (NYSE/Nasdaq tickers) are given only where the SEC company record shows them (10 rows) and matched to that record by the build script; newly listed developers (X-energy, Deep Fission, Hadron, Terrestrial, Terra Innovatum, newcleo) are included.
- DOE programmes that are hard to cross-reference are attached to the developer: 9 of the 10 companies named by DOE for the Reactor Pilot Program (Atomic Alchemy is excluded), ARDP demonstration and risk-reduction awards with award values, ARC-20 and the Gen III+ SMR awards.
- Every row carries the exact source wording (evidence_quote); a script re-checked every quote against the 79 source documents on 2026-10-12 and refuses to build if any quote or keyword check fails.
Limitations and what's not included
- Not a complete list of SMR developers. 37 developers are included; 18 candidates or groups are excluded with the reason in excluded_candidates. Notable gaps: Canadian VDR status (the CNSC site's terms forbid commercial reproduction, so CNSC status is not given for any row); IAEA ARIS (terms could not be read); developers whose own websites forbid copying and that have no regulator or SEC source (Moltex, Saltfoss/Seaborg, Calogena); Korea (KHNP robots.txt disallows all), Russia (Rosatom site unreachable); and Japanese, Indian and Chinese developers (CNNC's ACP100 page was too thin to use), which were not reviewed in this build.
- US coverage is driven by the NRC pre-application list and DOE announcements, so US developers dominate. Several rows have fields 'not stated in sources used' because the only reusable source (often the NRC page) does not give them; the developer's own website was not used where its terms forbid copying (Aalo, Blue Energy, First American Nuclear, Last Energy).
- Regulatory status is as of each page's last-updated date (shown in the row) or filing date. 'NRC pre-application' means the NRC lists the organisation as engaged in pre-application activities; it is not an application or approval. Applications filed by utilities or universities (TVA, Long Mott Energy/Dow, Palisades SMR, Abilene Christian University, University of Illinois) are shown in the developer's row and say who the applicant is.
- Where an NRC milestone table marks a construction-permit decision with a date, the row repeats that wording (e.g. Kemmerer 'Construction Permit Decision 03/09/2026 - A'); the row does not claim more than the table states. Company statements of reactor criticality (Deployable Energy, Valar Atomics) are the companies' own statements.
- Capacity is as stated and in the stated unit and basis (gross/net, per module or per plant); it is not converted. Announced deployments are as stated by the regulator or developer and include non-binding agreements where the source says so.
- Websites and tickers come only from the NRC page, the SEC company record or the developer's own site; 'not stated in sources used' otherwise.
- Organisation data only: no people's names or contact details. Delivered as CSV; no API.
Where the source data is published
Everything here can be read free of charge: NRC pages (nrc.gov), DOE pages (energy.gov), SEC filings on EDGAR, UK ONR pages and reports (onr.org.uk), and the developers' web pages cited. URLs are in every row. ReqoData's work is finding each developer across 79 documents, separating developers from utilities and site applicants, keeping type and capacity in the source's own words, checking listings against the SEC record, and keeping the exact wording beside each row.
Organization info only. The list contains no personal contact details of individuals.
Columns in the CSV (13)
| Column | Description |
|---|---|
| developer_name | Organisation developing the reactor design (one row per developer). |
| hq_country | Head-office country, with city where the source gives it; 'not stated in sources used' otherwise. |
| listing | Exchange and ticker only as shown by the SEC company record; 'not stated in source used' otherwise. |
| design_name | Design or product name(s) as written in the source. |
| reactor_type | Reactor type as stated in the quoted line (e.g. PWR, HTGR, sodium fast reactor, molten salt, lead-cooled, microreactor). Not inferred from a category heading. |
| stated_capacity | Capacity exactly as stated, with its unit (MWe / MWt / MW). Not converted. |
| regulatory_status | US NRC and UK ONR GDA status with dates and docket numbers, read from the regulator's page (and company filings where marked). CNSC status is not given (CNSC site not used). |
| doe_awards | US DOE selections/awards named in DOE or SEC sources (Reactor Pilot Program, ARDP, Gen III+ SMR, ARC-20). |
| announced_deployments | Up to three sites/projects as stated by the regulator or the developer; not an assessment of likelihood. |
| website | Website as given by the NRC page, the SEC record or the developer's own site; 'not stated in sources used' otherwise. |
| source_url | Primary source URL(s) for the row, separated by ' | '. |
| evidence_quote | Exact wording relied on (several quotes separated by ' || '). Spanish/French quotes kept in the original language. |
| last_verified | Date ReqoData last re-checked every quote for the row against the source. |
Sources and licenses
- US NRC - Advanced reactor pre-application pages and application pages (construction permits, standard design approval)ToS judgement: usable. US federal government work (public domain); robots.txt allows these paths for general user agents; requests spaced several seconds apart
- US DOE - Reactor Pilot Program selections, ARDP pages and award articles, Gen III+ SMR selections, Project Pele articleToS judgement: usable. US federal government work (public domain)
- SEC EDGAR - 10-Q/10-K/F-1 filings of NuScale, Oklo, X-Energy, Nano Nuclear, Terrestrial Energy, Terra Innovatum, Deep Fission, Hadron Energy, newcleo; company records for listingsToS judgement: usable. US government records; SEC fair-access policy followed (declared user agent, low request rate)
- UK ONR - Generic Design Assessment pages, news and the Rolls-Royce SMR Step 2 summary reportToS judgement: usable. Contains public sector information published by the Office for Nuclear Regulation and licensed under the Open Government Licence v3.0 (https://www.nationalarchives.gov.uk/doc/open-government-licence/version/3/)
- Argentina.gob.ar - CNEA SMR pageToS judgement: usable. Site content licensed under Creative Commons Attribution 4.0 International (https://creativecommons.org/licenses/by/4.0/) unless stated otherwise (source: Argentina.gob.ar / CNEA)
- Developer websites without reuse restrictions found: Steady Energy, Copenhagen Atomics, Blykalla, Stellaria, Natura Resources, Valar Atomics, Deployable Energy, REPLOY Power, Apollo AtomicsToS judgement: usable for facts with short quotations. No terms of use restricting reuse were found (copyright notices or cookie/privacy policies only); robots.txt allows the pages fetched
Last verified: Oct 12, 2026
Frequently Asked Questions
Q.Where does the data come from?
Mainly from the official registers and other public data listed on this page under “Sources and licenses”. For some lists, ReqoData added columns (such as website URLs) after checking each organization's own website; those sources are listed there too. Organization info only — no personal contact details.
Q.Is the full list available now?
Yes. After payment you get the CSV (37 rows, last verified Oct 12, 2026) on a download page right away.
Q.What does it cost?
$149, a one-time card payment through Stripe. There is no subscription. As a digital product, it can't be returned for change of mind; if the file has a material error, report it from the download page and we'll provide a corrected file or a refund.
Q.Is the list updated after purchase?
No. The CSV reflects the sources as of NRC pre-application and application pages (last updated 2026-09-14 to 2026-10-06); DOE press releases and pages (2020-12 to 2025-12); SEC filings (Forms 10-Q for Q2 2026, Terrestrial 10-K for 2025, newcleo F-1 filed 2026-10-06); UK ONR GDA pages and news (to 2026-03-31) and the Rolls-Royce SMR Step 2 summary report; developer web pages; all read on 2026-10-12; on Oct 12, 2026 (last verified) we confirmed these were the latest versions published. It isn't updated automatically, and there is no API. If you download it again later, you get the version of this list we provide at that time.
Q.What format is it delivered in?
CSV (opens in Excel or Google Sheets). There is no API.