| London term | Reverse takeover (AIM Rule 14) |
| Approval | general meeting of the quoted company |
| Document | new admission document for the enlarged company |
| Cash shell on AIM | 6 months to complete a reverse takeover |
| Aquis | corporate adviser compulsory for a possible reverse takeover |
| Updated | November 2026 |
What a listed shell is in London
A listed shell is a quoted company with little or no business of its own, into which an owner puts an operating business. In London the transaction is called a reverse takeover. The AIM Rules define it as any acquisition or series of acquisitions within 12 months that fundamentally changes the quoted company's business, board or voting control.
On AIM, a shell in the narrow sense is the cash shell. An AIM company that disposes of all or substantially all of its trading business becomes an AIM Rule 15 cash shell on completion. From then on it has 6 months to complete an acquisition that counts as a reverse takeover. So the shell has a use-by date, and anyone thinking of buying one should know it.
If you are searching for a listed shell to buy or a shell vendor, you will find no quoted companies on offer here. Our work begins when you have a specific company in view: we review its registers and records and run the administration through the transaction.
How a reverse takeover runs on AIM
The AIM Rules set the frame. In outline:
- 1
Conditional agreement
Any agreement that would bring about a reverse takeover is conditional on the approval of the AIM company's shareholders in general meeting.
- 2
Announcement and admission document
The company announces the transaction without delay and publishes an admission document for the enlarged company. Under the new prospectus rules, for a reverse takeover that is an MTF admission prospectus.
- 3
Trading may continue
Since the AIM Rules of 5 August 2026 the exchange can do without a suspension of trading where the Nominated Adviser is satisfied that suitable replacement disclosure is out.
- 4
Approval and completion
If shareholders approve, trading in the existing shares ends on completion of the acquisition.
- 5
Readmission
The enlarged company applies for admission like any new applicant, with a Nominated Adviser, deadlines and a dealing notice.
Aquis: the corporate adviser comes back
On the Aquis Growth Market, companies have been able to use Support Services instead of a standing corporate adviser since January 2026. Not for a reverse takeover: a company planning a transaction that could be a reverse takeover must appoint an Aquis corporate adviser. If you have an Aquis shell in view, budget for that appointment from the start.
The share exchange in company law
Most reverse takeovers run as a share exchange: the quoted PLC issues new shares and receives the shares in your operating business in return. In company law that is an allotment of shares for non-cash consideration. A PLC may generally allot shares for non-cash consideration only if the consideration has been independently valued, with the report made in the six months before allotment and sent to the allottee. The valuer must be eligible as statutory auditor and independent.
There is an important exception: the valuation duty does not apply where the shares are allotted in a share exchange open to all holders of shares in the target company. Whether that exception applies depends on how the offer is structured, not on its label. More under non-cash consideration. The tax side for shareholders in your home country is a separate topic; see share exchange into a UK PLC.
Reviewing the shell: our part
Before the advisers talk about valuation and documents, we look into the quoted company's files. Typical checks:
- Register of members against Companies House: do the number, class and holders of the shares match?
- Capital history: is there a resolution, a directors' authority and a filing for every allotment?
- Articles: share classes, pre-emption rights and restrictions that could stand in the way of issuing new shares
- Persons with significant control: are they filed, and have they verified their identity at Companies House?
- Directors and company secretary: are all appointments filed, all directors verified, and is the secretary qualified?
- Deadlines: were annual accounts, confirmation statements and market reports on time?
- General meetings: are there minutes and resolutions for recent years?
Why the shell is rarely the shortcut
The appeal of a shell is the hope of skipping the admission process. The rules barely allow it: on AIM the enlarged company needs an admission document and readmission like a first-time applicant. What you gain is an existing shareholder base and an existing trading history. What you take on with it are the failings of the past.
Add a small tax point on the Main Market: the Stamp Duty Reserve Tax relief for newly listed companies expressly does not apply on a change of control. If you want to look at the direct road instead, it is under PLC Going Public.
Common questions about listed shells
What does reversing into a listed shell mean?
You put the shares in your operating business into the quoted company and receive new shares in return. In London that is a reverse takeover, with a general meeting, an admission document and readmission of the enlarged company.
Is a SPAC the same as a listed shell?
Both are quoted companies that only acquire an operating business through a takeover. On AIM, a company without a trading business is a cash shell and has a 6-month deadline. Anything to do with raising capital and investors belongs with the regulated advisers.
What happens to the shell's company secretary?
A PLC must always have a company secretary, and the directors must make sure that person has the necessary experience and qualifications. In a reverse takeover we often take on that role once the registers have been reviewed.
How long does the register review take?
That depends on the state of the files. A well-kept company is reviewed quickly; missing resolutions and unfiled allotments take time, because they have to be remedied after the event.
Sources: London Stock Exchange: AIM Rules for Companies (August 2026, PDF); Aquis: Growth Market Access Rulebook v1.2 (January 2026, PDF); legislation.gov.uk: Companies Act 2006, section 593; legislation.gov.uk: Companies Act 2006, section 594; legislation.gov.uk: Companies Act 2006, section 1150; FCA: PS25/9 (PDF)
