Secondaries: Trading Fully Paid-Up Shares in a UK Private Company

This guide assumes fully paid ordinary shares in a UK private limited company, where all pre-emption rights have been waived or satisfied, and the parties have agreed commercial terms.

The standard instrument of transfer for fully paid shares in a UK company is the J30 stock transfer form, prescribed under Schedule 1 of the Stock Transfer Act 1963. Section 770 of the Companies Act 2006 requires that a "proper instrument of transfer" be delivered to the company before it may register a change in ownership.

The transferor (seller) must complete the following fields on the J30:

• Full name of the company in which shares are held, together with the company registration number.
• A full description of the security being transferred — for example, "Ordinary Shares of £1.00 each."
• The number of shares being transferred, stated in both words and figures.
• The consideration — the amount being paid for the shares, stated in both words and figures. If no consideration is being paid, this should be recorded as "NIL."
• The full name(s) and address(es) of the transferor.
• The full name(s) and address(es) of the transferee (buyer).

The transferor signs and dates the form. Under the Stock Transfer Act 1963, execution by the transferor alone is sufficient for fully paid shares — the transferee's signature is not required unless the company's articles of association stipulate otherwise. The form does not need to be witnessed.

Where a broker or agent is acting on behalf of the transferor, the form includes a designated field for the agent's stamp or identifying details. The form should be completed in block capitals and black ink. Any errors should be crossed out and initialled — correction fluid should not be used.

Stamp duty is payable on the transfer of shares in a UK company where chargeable consideration exceeds £1,000. The rate is 0.5% of the consideration, rounded up to the nearest £5. The liability falls on the transferee.

There are three scenarios:

• Consideration exceeds £1,000: Stamp duty is payable. Do not complete either certificate on the reverse of the J30. The form must be submitted to HMRC.
• Consideration is £1,000 or less and the transfer does not form part of a larger transaction exceeding £1,000 in aggregate: Complete Certificate 1 on the reverse of the J30. No submission to HMRC is required.
• No chargeable consideration (e.g. a gift, transfer between spouses, or transfer between trustees): Complete Certificate 2 on the reverse of the J30. No submission to HMRC is required.
• Consideration is nil with no exemption claimed: Neither certificate needs to be completed and the form does not need to be submitted to HMRC.

Where stamp duty is payable, the transferee (or their agent) must submit the signed J30 to HMRC and pay the duty within 30 days of the date of execution. Late submission may attract penalties and interest.

Submission is made by email to HMRC's Stamp Taxes mailbox. The physical stamping process was permanently withdrawn in March 2020. HMRC now processes the submission and issues a confirmation letter, which serves as evidence that the instrument has been duly stamped. HMRC aims to process 80% of submissions within 15 working days.

Once the J30 has been executed and, where applicable, stamped or certified as exempt, the following documents should be delivered to the company (specifically to the company secretary, the board, or the company's registrar — not to Companies House):

• The completed and signed J30 stock transfer form.
• The transferor's existing share certificate(s) covering the shares being transferred.
• The HMRC confirmation letter, if stamp duty was paid.

The company should not register the transfer until it has received a properly executed instrument of transfer. Any transfer registered without a proper instrument may be invalid.

The directors of the company must consider and, if appropriate, resolve to approve the registration of the transfer. This is typically done by board resolution, either at a board meeting or by written resolution, depending on the company's articles.

Many private company articles give directors discretion to refuse to register a transfer. If the board declines to register, it must notify the transferee within two months of the date on which the transfer was lodged, giving reasons for the refusal.

The board resolution should be recorded in the company's minute book, noting the details of the transfer, the shares involved, and the decision to approve registration.

Upon board approval, the company secretary (or directors, if no company secretary is appointed) updates the statutory register of members to reflect the change in ownership. This is the decisive step — legal title to the shares passes to the transferee at the point the register is updated, and not before.

The register of members is the definitive record of share ownership in a UK company. It takes precedence over share certificates, Companies House filings, and any contractual documentation.

If the transfer results in a change to any person with significant control over the company — for example, if the transferee crosses the 25% threshold — the company must also update its PSC register and file the appropriate notification with Companies House.

The company must issue a new share certificate to the transferee within two months of the date on which the transfer is registered. The certificate should state the company name and registration number, the name of the shareholder, the number and class of shares held, the nominal value of those shares, and any distinguishing numbers (if applicable).

The transferor's old certificate is cancelled and retained with the company's records. If the transferor retained a portion of their holding, a balance certificate is issued for the remaining shares.

Share certificates are prima facie evidence of title — they evidence what the register of members records, but they are not in themselves proof of ownership.

No separate filing is required at Companies House at the time of transfer. The updated shareholding is reflected in the company's next annual confirmation statement (form CS01), which confirms the company's details — including its current statement of capital and list of shareholders — as at the confirmation date.

If the company has elected to keep its register of members on the Companies House central register (available since 2016), the update is made directly to the central register rather than to a privately maintained register, and the change is reflected in the public record from the point of update.

Where stamp duty was paid and the company is repurchasing its own shares, a form SH03 should be filed with Companies House, accompanied by a copy of the HMRC confirmation letter.