AION SILICON LIMITED
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Cash
£3.2m
+622.4% highest in 3 filed years
Net assets
£4.9m
+114% highest in 3 filed years
Employees
36
-41% lowest in 3 filed years
Profit before tax
£9.7m
+297.4% highest in 3 filed years
Net assets
3-year trend · vs Industrials median
Accounts
3-year trend · Δ = latest vs prior filed period · latest reflected 2025-12-31
| Metric | Trend | 2023-12-31 | 2024-12-31 | 2025-12-31 | Δ vs prior |
|---|---|---|---|---|---|
| Turnover | £9,178,211 | £7,891,170 | £11,216,653 | +42.1% | |
| Operating profit | -£16,583,287 | -£3,375,792 | £9,675,593 | +386.6% | |
| Profit before tax | -£17,225,203 | -£4,889,708 | £9,651,178 | +297.4% | |
| Net profit | -£20,333,233 | -£4,077,885 | £15,268,508 | +474.4% | |
| Cash | £877 | £447,121 | £3,229,892 | +622.4% | |
| Total assets less current liabilities | -£25,718,441 | -£27,898,563 | £4,893,367 | +117.5% | |
| Net assets | -£30,945,519 | -£35,023,404 | £4,893,367 | +114% | |
| Equity | — | — | £4,893,367 | — | |
| Average employees | 49 | 61 | 36 | -41% | |
| Wages | £3,529,482 | £4,166,859 | £2,636,150 | -36.7% | |
| Directors' remuneration | £280,000 | £348,333 | — | — |
Values shown as filed in the company's annual accounts. — indicates the figure wasn't present under that line item in that period. The Δ column is the change from the prior filed period as a percentage of |prior|; lines a company doesn't report show —. About these numbers
Ratios
Computed from the line items above — sparklines read oldest → newest
| Ratio | Trend | 2023-12-31 | 2024-12-31 | 2025-12-31 |
|---|---|---|---|---|
| Operating margin | -180.7% | -42.8% | 86.3% | |
| Net margin | — | -51.7% | 136.1% | |
| Return on capital employed | — | — | 197.7% | |
| Gearing (liabilities / total assets) | 499.1% | 611.5% | — | |
| Current ratio | 0.13x | 0.19x | — | |
| Interest cover | -25.83x | -2.23x | — |
Margins divide P&L lines by turnover. Gearing is liabilities over total assets. Current ratio is current assets over creditors falling due within one year. Interest cover is operating profit over absolute finance costs. Margin ratios are hidden where reported turnover is too small relative to profit to yield a meaningful figure — typical of holding companies whose income is mostly subsidiary dividends rather than trading revenue. Sector-distribution context coming next.
Name history
Renamed 1 time since incorporation
- AION SILICON LIMITED 2025-04-28 → present
- SONDREL LIMITED 2002-07-23 → 2025-04-28
Audit & accounting basis
- Accounting basis
- FRS 102
- Reporting scope
- Standalone (parent only)
- Auditor
- Grant Thornton UK LLP
- Audit opinion
- Unqualified (clean)
- Going concern
- Affirmed
“The directors have reviewed the cash flow forecasts for the group covering a period of at least 12 months from the date of the approval of the financial statements and together with the projected revenue and available cash reserves. They are confident that sufficient funding is available to support ongoing trading activity and investment plans for the business.”
Group structure
- AION SILICON LIMITED · parent
- Sondrel (Xi'an) Company Limited 100%
Significant events
- “In 2025, the company completed a comprehensive rebrand from Sondrel Limited to Aion Silicon Limited, fundamentally repositioning the business for the next phase of its growth journey.”
- “The company passed a special resolution on 15 April 2025 and changed its name on 28 April 2025 from Sondrel Limited to Aion Silicon Limited.”
- “While the decision to close the group's Xi'an office was taken during the year ended 31 December 2025, the orderly closure commenced after the reporting date and no substantive closure activities had occurred at year end. Actions taken after the reporting date include vacating the premises, terminating contracts, and initiating statutory tax deregistration.”
Auditor, going-concern and subsidiary information is drawn from the narrative of the latest annual accounts. About these numbers
People
2 active · 8 resigned
| Name | Role | Appointed | Born | Nationality |
|---|---|---|---|---|
| JONES, Oliver William Adam | Director | 2025-01-30 | May 1981 | British |
| JULIO, Mark Steven | Director | 2025-01-30 | Mar 1978 | British |
Show 8 resigned officers
| Name | Role | Appointed | Resigned |
|---|---|---|---|
| CURREN, Claire | Secretary | 2006-08-10 | 2022-10-21 |
| HARRISON, Ian Neil | Secretary | 2003-06-24 | 2006-08-10 |
| SPOONER, Richard Michael | Secretary | 2002-07-23 | 2003-06-24 |
| BRIGHTON SECRETARY LIMITED | Corporate Nominee Secretary | 2002-07-23 | 2002-07-25 |
| ONE ADVISORY LIMITED | Corporate Secretary | 2022-10-21 | 2024-08-31 |
| CURREN, Graham Stephen | Director | 2002-07-23 | 2025-01-30 |
| HARRISON, Ian Neil | Director | 2002-07-23 | 2006-08-10 |
| BRIGHTON DIRECTOR LIMITED | Corporate Nominee Director | 2002-07-23 | 2002-07-25 |
Ownership
Persons with significant control
| Name | Kind | Nature of control | Notified | Status |
|---|---|---|---|---|
| Sondrel (Holdings) Limited | Corporate entity | Shares 75–100%, Voting 75–100%, Appoints directors | 2016-04-06 | Active |
Filing timeline
Last 20 of 117 total filings
Material constitutional events — rename, articles re-file, resolution
- 2025-04-28 CERTNM Certificate change of name company PDF
| Date | Type | Category | Description | |
|---|---|---|---|---|
| 2026-07-28 | AA | accounts | Accounts with accounts type full | |
| 2026-06-25 | CS01 | confirmation-statement | Confirmation statement with updates | |
| 2026-06-23 | PSC05 | persons-with-significant-control | Change to a person with significant control | |
| 2025-10-06 | AA | accounts | Accounts with accounts type full | |
| 2025-06-23 | CS01 | confirmation-statement | Confirmation statement with updates | |
| 2025-05-16 | CH01 | officers | Change person director company with change date | |
| 2025-05-15 | PSC05 | persons-with-significant-control | Change to a person with significant control | |
| 2025-05-15 | AD01 | address | Change registered office address company with date old address new address | |
| 2025-05-15 | CH01 | officers | Change person director company with change date | |
| 2025-04-28 | CERTNM | change-of-name | Certificate change of name company | |
| 2025-02-06 | AP01 | officers | Appoint person director company with name date | |
| 2025-02-06 | TM01 | officers | Termination director company with name termination date | |
| 2025-02-06 | AP01 | officers | Appoint person director company with name date | |
| 2024-12-19 | AA | accounts | Accounts with accounts type full | |
| 2024-11-14 | MR01 | mortgage | Mortgage create with deed with charge number charge creation date | |
| 2024-09-18 | PSC05 | persons-with-significant-control | Change to a person with significant control | |
| 2024-09-11 | TM02 | officers | Termination secretary company with name termination date | |
| 2024-08-06 | MR04 | mortgage | Mortgage satisfy charge full | |
| 2024-08-06 | MR04 | mortgage | Mortgage satisfy charge full | |
| 2024-07-03 | CS01 | confirmation-statement | Confirmation statement with no updates |
Public-record activity
Raw counts from Companies House — last 12–24 months
- Filings
- 4
- Capital events
- 0
- Officers appointed
- 0
- Officers resigned
- 0
last 12 months
last 24 months
last 12 months
last 12 months
Direct counts from the register. No score, no rating — see the Filing timeline for the underlying events.