SILEX SYSTEMS LIMITED
SILEX Systems Limited is an Australian public company registered with Australian Business Number (ABN) 69 003 372 067, which the Australian Business Register confirms also carries Australian Company Number (ACN) 003 372 067 and an “Australian Public Company” entity type, current as of this review. Company records on file give SILEX Systems Limited’s incorporation date as 31 May 2000; separate market-data sources instead cite a September 1987 ACN registration date for the same ACN, a discrepancy that could not be resolved against a primary ASIC company extract during this review. SILEX Systems Limited’s registered office and principal place of business is Building 64, Lucas Heights Science and Technology Centre, New Illawarra Road, Lucas Heights, New South Wales 2234, Australia, per the company’s own half-year report. The company has traded on the Australian Securities Exchange since 1998 under ticker SLX (ISIN AU000000SLX4). SILEX Systems Limited develops and licenses the SILEX laser enrichment process, a technology that separates isotopes using tuned lasers. Its principal commercial application is uranium enrichment for nuclear fuel, exclusively licensed to Global Laser Enrichment LLC, a United States joint venture in which SILEX Systems Limited holds a 51% interest and Canadian nuclear-fuel group Cameco Corporation holds the remaining 49%, with an option, confirmed in Cameco Corporation’s own regulatory filings, to increase its interest to 75%; Global Laser Enrichment LLC holds a licence from the United States Nuclear Regulatory Commission for a laser-enrichment facility at Paducah, Kentucky. Beyond uranium enrichment, SILEX Systems Limited is developing further commercial applications of its underlying laser technology, including “zero-spin” enriched silicon-28 for silicon-based quantum-computing hardware and isotope enrichment for medical and cancer-therapy uses. SILEX Systems Limited reports its results across three segments: Silex Systems, the Australian parent covering the core enrichment technology and its quantum and medical isotope programmes; Translucent, a wholly owned United States subsidiary that previously developed cREO rare-earth oxide semiconductor materials, related intellectual property having since been acquired by UK-listed IQE plc; and Silex USA. Reported revenue and employee figures for a recent financial year could not be confirmed against a primary filing in the sources reviewed on 18 September 2026.
- Company fundamentals
- Corporate linkage & group structures
- Digitized company financials
- Firmographics — websites, social profiles, revenue and employee estimates
Shareholders
2
Shareholders of SILEX Systems Limited
SILEX Systems Limited is listed on the Australian Securities Exchange (ASX: SLX), and Australian continuous-disclosure rules require only holders whose voting power reaches or changes across a 5% threshold to lodge a substantial-holder notice; the company does not otherwise publish a complete shareholder register. On that basis, disclosed substantial holders include Van Eck Associates Corporation, which lodged a notice of becoming a substantial holder around May 2026 reporting voting power of approximately 5.39% (over 12.8 million ordinary shares) through its funds-management business, and The Bank of New York Mellon Corporation and its group entities, which lodged a notice ceasing to be a substantial holder around 12 March 2026. Multiple third-party market-data providers separately and consistently report Jardvan Pty Ltd as the largest holder, with a stake commonly cited between approximately 11% and 12.5%, and cite The Vanguard Group, Inc. and Majenta Holdings Pty Ltd among other notable holders; these figures could not be independently verified against a primary ASX substantial-holder notice during this review and are reported here only as third-party estimates, not as confirmed disclosures. The same data providers estimate that individuals and the general public hold more than half of the register, consistent with a broadly held ASX-listed company.
Ultimate beneficial ownership
No authoritative source reviewed identifies an individual ultimate beneficial owner of SILEX Systems Limited, and no complete, dated ownership chain is available to calculate an effective UBO percentage. If Jardvan Pty Ltd is confirmed as a substantial corporate shareholder, a further ownership disclosure for that entity would be required before any natural-person UBO could be identified; no such disclosure was located.
Data availability
Major shareholders only: as an ASX-listed public company, SILEX Systems Limited discloses substantial shareholders (5% and above) through ASX substantial-holder notices, but the complete shareholder register is not publicly available. The disclosed substantial-holder figures above are dated between March 2026 and May 2026.
Sources
- ASX Market Announcements, SILEX Systems Limited (SLX), Becoming a substantial holder – Van Eck Associates Corporation, on or about May 2026, referenced via listcorp.com/asx/slx, retrieved 18 September 2026
- ASX Market Announcements, SILEX Systems Limited (SLX), Ceasing to be a substantial holder – BNY Mellon group entities, on or about 12 March 2026, referenced via listcorp.com/asx/slx, retrieved 18 September 2026
Registry feed — rows exactly as filed with Australian Securities and Investments Commission (ASIC), including entries the profile above does not cover.
| Shareholder | Type | Holding | Source Document |
|---|---|---|---|
| GLOBAL X FUNDS-Global X Uranium ETF | 25.8% | Australian Securities and Investments Commission (ASIC) | |
| EXCHANGE TRADED CONCEPTS TRUST-Range Nuclear Renaissance Index ETF | 10.7% | Australian Securities and Investments Commission (ASIC) |
Officers
7
Directors and officers of SILEX Systems Limited
According to SILEX Systems Limited’s official website, the current board comprises four directors: Craig Roy (Chair and Non-Executive Director), Dr Michael Goldsworthy (Managing Director and Chief Executive Officer, the board’s sole executive director), Christopher Wilks (Non-Executive Director) and Susan Corlett (Non-Executive Director, appointed to the board in November 2024). The senior executive team disclosed alongside the board also includes Julie Russell as Chief Financial Officer and Company Secretary, and Dr Geordie Graetz as Chief Commercial Officer. Nationality is not inferred from any name in this overview, and the source reviewed does not disclose nationality, country of residence, occupation or appointment dates for these individuals beyond Ms Corlett’s November 2024 appointment.
Recent officer changes
- November 2024 – Susan Corlett appointed as a Non-Executive Director, per the company’s official leadership page.
Data availability
Partial: SILEX Systems Limited’s official website names its current directors and senior executives and their roles, but does not itemise individual appointment dates (other than the November 2024 appointment noted above), occupation, nationality or country of residence; a complete history of former officers was not located in the sources reviewed.
Sources
- SILEX Systems Limited, “Board of Directors and Executive Management,” silex.com.au/corporate-values/leadership/, retrieved 18 September 2026
Registry feed — rows exactly as filed with Australian Securities and Investments Commission (ASIC), including entries the profile above does not cover.
Group Structure
Group structure of SILEX Systems Limited
SILEX Systems Limited is an ASX-listed parent company and is not disclosed as a subsidiary of any other entity. Its most significant disclosed corporate relationship is Global Laser Enrichment LLC, a United States joint-venture entity holding the exclusive worldwide licence to the SILEX laser uranium-enrichment technology; SILEX Systems Limited holds a 51% interest in Global Laser Enrichment LLC, with Canadian nuclear-fuel group Cameco Corporation holding the remaining 49% and an option, confirmed in Cameco Corporation’s own regulatory filings, to increase its interest to 75%. SILEX Systems Limited reports Translucent as a wholly owned United States subsidiary, based in North Carolina, which previously developed cREO rare-earth oxide semiconductor materials; the related intellectual property has since been acquired by UK-listed IQE plc. The company also reports a “Silex USA” segment, based in North Carolina, though a distinct registered entity name and registration number for Silex USA were not located in the sources reviewed. No parent company above SILEX Systems Limited is disclosed.
Verified corporate relationships
| Entity | Country | Registration number | Relationship | Ownership | Status | Information date |
|---|---|---|---|---|---|---|
| Global Laser Enrichment LLC | United States | Not disclosed in sources reviewed | Joint venture | 51% SILEX Systems Limited; 49% Cameco Corporation (option to increase to 75%) | Active | 2024, per Cameco Corporation regulatory filings |
| Translucent, Inc. | United States | Not disclosed in sources reviewed | Direct subsidiary (wholly owned) | 100% | Active | Not dated in sources reviewed |
Recent structural changes
No verified acquisition, disposal, merger or reorganisation affecting SILEX Systems Limited’s own group structure was located beyond the earlier restructuring of Global Laser Enrichment LLC’s ownership between SILEX Systems Limited and Cameco Corporation.
Data availability
Partial: SILEX Systems Limited’s interest in Global Laser Enrichment LLC and its ownership of Translucent are disclosed by the company and by joint-venture partner Cameco Corporation, but registration numbers for these United States entities and a complete list of any further subsidiaries were not located in the sources reviewed.
Sources
- SILEX Systems Limited, “Global Laser Enrichment,” silex.com.au/silex-technology/global-laser-enrichment/, retrieved 18 September 2026
- Cameco Corporation, Form 6-K filings regarding Global Laser Enrichment ownership restructuring, sec.gov/Archives/edgar/data/1009001/, retrieved 18 September 2026
SILEX SYSTEMS LIMITED
Australia
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Frequently Asked Questions
What does SILEX Systems Limited do?
SILEX Systems Limited is an Australian technology company that develops and licenses the SILEX laser enrichment process, an isotope-separation technology used principally for uranium enrichment, and is also developing applications of the technology for silicon-based quantum computing and medical isotope production.
What is SILEX Systems Limited's registration number?
SILEX Systems Limited's Australian Business Number (ABN) is 69 003 372 067, confirmed via the Australian Business Register, which also lists Australian Company Number (ACN) 003 372 067 for the same entity.
What is SILEX Systems Limited's legal form?
The Australian Business Register classifies SILEX Systems Limited as an Australian Public Company, consistent with its status as a company listed on the Australian Securities Exchange.
When was SILEX Systems Limited incorporated?
Company records on file give an incorporation date of 31 May 2000. Separate third-party market-data sources instead cite a September 1987 registration date for the same Australian Company Number, and this discrepancy could not be resolved against a primary ASIC record during this review.
What is SILEX Systems Limited's registered address?
SILEX Systems Limited's registered office and principal place of business is Building 64, Lucas Heights Science and Technology Centre, New Illawarra Road, Lucas Heights, New South Wales 2234, Australia.
Is SILEX Systems Limited publicly listed?
Yes. SILEX Systems Limited has traded on the Australian Securities Exchange under ticker SLX since 1998, with ISIN AU000000SLX4.
What is SILEX Systems Limited's current company status?
The Australian Business Register shows SILEX Systems Limited as an active, GST-registered entity (registered for GST from 1 July 2000), and the company continues to trade on the Australian Securities Exchange as at this review.
Who is the CEO of SILEX Systems Limited?
Dr Michael Goldsworthy is SILEX Systems Limited's Managing Director and Chief Executive Officer, and the sole executive director on its board, according to the company's official website.
Who are SILEX Systems Limited's current directors?
SILEX Systems Limited's board comprises Craig Roy (Chair, Non-Executive Director), Dr Michael Goldsworthy (Managing Director and CEO), Christopher Wilks (Non-Executive Director) and Susan Corlett (Non-Executive Director, appointed November 2024), per the company's official website.
What is Global Laser Enrichment?
Global Laser Enrichment LLC is a United States joint venture holding the exclusive worldwide licence to SILEX Systems Limited's laser uranium-enrichment technology. SILEX Systems Limited holds a 51% interest, and Cameco Corporation holds the remaining 49% with an option to increase its stake to 75%, per Cameco Corporation's regulatory filings.
Does SILEX Systems Limited have subsidiaries?
SILEX Systems Limited reports Translucent, Inc. as a wholly owned United States subsidiary, and a Silex USA segment based in North Carolina; a distinct registered entity name and registration number for Silex USA were not located in the sources reviewed.
Who are SILEX Systems Limited's major shareholders?
As an ASX-listed company, SILEX Systems Limited discloses only substantial shareholders (5% and above) through ASX substantial-holder notices; recent disclosed holders include Van Eck Associates Corporation (around 5.39%, notified May 2026), while BNY Mellon group entities ceased to be a substantial holder around 12 March 2026. A complete shareholder register is not publicly available.
What is SILEX Systems Limited's official website?
SILEX Systems Limited's official website is www.silex.com.au.
What quantum-computing application is SILEX Systems Limited developing?
SILEX Systems Limited is developing "zero-spin" enriched silicon-28 using its SILEX laser separation technology, intended as a substrate material for silicon-based quantum-computing hardware, in addition to its core uranium-enrichment licensing business.