Do You Have to Disclose a Share Pledge on AIM?
Yes, if you are a director or other person discharging managerial responsibilities (PDMR) of the AIM company: Article 19 of UK MAR makes a share pledge a notifiable transaction, reported to the company and the FCA within three working days. Shareholder notices under DTR 5 and AIM Rule 17 follow changes in holdings or votes, which enforcement can cause.
Which rules apply to a share pledge on AIM?
Four sets of rules can apply to a pledge of AIM shares, and each asks a different question. The first is UK MAR, Regulation (EU) No 596/2014 on market abuse as it forms part of UK law, whose Article 19 governs personal transactions by directors and other persons discharging managerial responsibilities (PDMRs), and by persons closely associated with them, in issuers that have requested or approved admission or trading of their instruments on a UK regulated market or a UK multilateral trading facility (Article 19(4)). AIM is a UK multilateral trading facility and an SME growth market, operated and regulated by the London Stock Exchange as a recognised investment exchange.
The second is the AIM Rules for Companies, in the edition effective 5 August 2026, which require announcements of changes to significant shareholdings (rule 17) and a dealing policy for directors and applicable employees (rule 21). The third is chapter 5 of the FCA’s Disclosure Guidance and Transparency Rules (DTR 5), which governs notifications of major holdings of voting rights and applies to AIM companies incorporated in the United Kingdom. The fourth, for a company with its registered office in the United Kingdom, the Channel Islands or the Isle of Man, is the Takeover Code, which matters if enforcement could give a lender 30 per cent or more of the votes.
UK MAR remains in force. It is listed for revocation in Schedule 1 to the Financial Services and Markets Act 2023, but as at 27 October 2026 that revocation had not taken effect, and the FCA’s market abuse pages, last updated on 23 February 2026, describe the Article 19 regime as current. The EU’s 2024 Listing Act amendments to Article 19 of EU MAR do not apply in the United Kingdom.
Must an AIM director disclose a share pledge under UK MAR?
Yes, once the annual threshold is reached: Article 19(7)(a) of UK MAR provides that the transactions a PDMR or closely associated person must notify include "the pledging or lending of financial instruments" by them or on their behalf. Under Article 19(1) the notification goes to the issuer and to the FCA "promptly and no later than three working days after the date of the transaction", and under Article 19(3) the issuer must make it public within two working days of receipt; Article 19(16) defines working days by reference to England and Wales bank holidays. The notification carries the information listed in Article 19(6), which adds that in the case of a pledge whose terms provide for its value to change, this should be disclosed together with its value at the date of the pledge.
One carve-out is built into the text. The last subparagraph of Article 19(7) provides that a pledge, or a similar security interest, of financial instruments in connection with the depositing of the financial instruments in a custody account does not need to be notified "unless and until such time that such pledge or other security interest is designated to secure a specific credit facility". A security interest that arises simply because shares sit in a custody account is therefore outside the duty, but a pledge given to secure a loan is not, and a custody-account security interest becomes notifiable once it is designated to secure a specific facility.
The threshold in Article 19(8) of UK MAR remains EUR 5,000 within a calendar year, calculated by adding all transactions without netting. Article 19(9) allows the FCA to raise it to EUR 20,000, and the FCA’s page on the regime still gives EUR 5,000. This is a point of divergence from the EU, where Regulation (EU) 2024/2809 raised the threshold to EUR 20,000 from 4 December 2024 and allows a national authority to raise it to EUR 50,000 or lower it to EUR 10,000.
Can an AIM director pledge shares during a close period?
Not freely. Article 19(11) of UK MAR prohibits a PDMR from conducting "any transactions on its own account or for the account of a third party, directly or indirectly" relating to the issuer’s shares, debt instruments or linked instruments during a closed period of 30 calendar days before the announcement of an interim financial report or a year-end report which the issuer is obliged to make public under the rules of its trading venue or the law of the United Kingdom. Article 19(11) does not list transaction types, but ESMA’s Q&A on MAR (ESMA70-145-111, Q7.9) answers "Yes" when asked whether the transactions prohibited in a closed period are the same types as those that must be notified under Article 19(1), adding that the prohibition applies to the PDMR only, not to closely associated persons. Because Article 19(7)(a) brings pledging within the notifiable set, a pledge falls within the closed period on that reading. ESMA’s Q&A is not part of UK law, but the FCA still refers to it on its market abuse pages, and the UK wording of Articles 19(7) and 19(11) matches the EU wording on this point.
Article 19(12) lets the issuer allow a PDMR to trade in a closed period in two cases only: exceptional circumstances, such as severe financial difficulty, which require the immediate sale of shares; or the characteristics of the trading, for employee share or saving schemes, qualification or entitlement of shares, or transactions where the beneficial interest in the relevant security does not change. Under Articles 7 and 8 of the UK version of Commission Delegated Regulation (EU) 2016/522, an exceptional-circumstances request must explain why the sale of shares is the only reasonable alternative to obtain the necessary financing, and the circumstances must be extremely urgent, unforeseen and compelling. Because that route is drafted around an immediate sale, it is not an obvious fit for granting a new pledge.
The AIM Rules add a company-level layer. Rule 21 requires every AIM company to have a reasonable and effective dealing policy that, at a minimum, sets out its close periods during which directors and applicable employees cannot deal, when clearance to deal is needed, who grants it and how, and how the company will notify deals required to be made public under MAR. The August 2026 AIM Rules do not define "deal" or "close period", so whether a pledge needs clearance turns on the company’s own policy, and the guidance to rule 21 states that compliance with it does not mean the company has satisfied its obligations under Article 19 of MAR. Other markets are compared in can directors pledge shares during a closed period.
Does a pledge trigger a DTR 5 or AIM Rule 17 shareholder notification?
Not necessarily. DTR 5 turns on voting rights, so a pledge under which the holder keeps the shares and controls the votes does not of itself change the holder’s DTR 5 percentage, while AIM rule 17 uses a wider test of legal or beneficial interest that should be checked against the security terms. DTR 5 applies to an AIM company that is a public company within the meaning of section 4(2) of the Companies Act 2006, or another body corporate incorporated and with its principal place of business in the United Kingdom, whose shares are admitted to trading on a prescribed market (limb (2B)(b) of the definition of issuer in the FCA Glossary); the AIM Rules call these DTR companies. For them, DTR 5.1.2R requires a notification when a person’s voting rights reach, exceed or fall below 3 per cent and each 1 per cent threshold above it, and DTR 5.8.3R requires it to reach the company as soon as possible and within two trading days.
The collateral limb is DTR 5.2.1R(c): a person is treated as holding the voting rights attaching to shares lodged as collateral with it, "provided that person controls the voting rights and declares its intention of exercising them". A lender that holds the shares as collateral without control of the votes is not caught by that limb; one that controls the votes and declares an intention to exercise them is, and may have its own notification to make. The other limbs of DTR 5.2.1R should also be checked against the security terms.
AIM rule 17 requires the company to announce without delay any relevant change to a significant shareholder, with the details in Schedule Five, which include the date of the change, the nature of the transaction and the nature and extent of the shareholder’s interest in it. A significant shareholder holds 3 per cent or more of a class of AIM security, a relevant change moves a holding above 3 per cent through any single percentage, and a holding is any legal or beneficial interest, whether direct or indirect, including positions in financial instruments within DTR 5.3.1. DTR 5.8.12R(2) gives a prescribed-market issuer until the end of the third trading day to publish, but the guidance to rule 17 requires DTR companies to notify without delay. For AIM companies outside DTR 5, typically those incorporated outside the United Kingdom, the guidance advises requiring equivalent notifications in their constitutions.
The analysis changes if the arrangement moves legal title, for example by registering the shares in a lender’s nominee name or using a title transfer structure: the lender may then hold a legal interest within the AIM definition of holding, or the shares themselves for DTR 5 purposes. How a particular security document is treated is a question for UK counsel.
What has to be disclosed if the lender enforces the pledge?
Enforcement is often the point at which the shareholder regimes engage, because it changes who holds the shares. If the lender sells or appropriates the shares, the borrower’s holding falls and any transferee’s rises, so each must test the change against the DTR 5 thresholds of 3 per cent and every 1 per cent above it, in either direction, and the AIM company must announce any relevant change to a significant shareholder under rule 17. A sale in the market or by placing is also subject to the trade reporting and holder disclosure covered under do block trades have to be disclosed.
For a PDMR borrower, UK MAR does not deal expressly with enforcement. Article 19(1) requires notification of transactions conducted on the PDMR’s own account, and the list of notifiable transactions in Article 10(2)(a) of the UK version of Delegated Regulation 2016/522 includes a disposal. Whether a lender’s enforcement sale is a notifiable transaction of the PDMR, and whether an enforcement inside a closed period engages Article 19(11), are not answered in the text and are questions for UK counsel. The EU text now goes further: since 4 December 2024, Article 19(12a) of EU MAR requires an issuer to allow transactions in a closed period that result exclusively from external factors or actions of third parties, although it does not mention enforcement either. UK MAR has no equivalent provision.
Separately, the prohibition on insider dealing in Article 14 of UK MAR applies at all times and to everyone, including a lender that holds inside information when it decides to sell.
Does the Takeover Code affect a pledged AIM stake?
It can, for a large holding. Section 3(a)(i) of the Introduction to the Takeover Code applies the Code to any company with its registered office in the United Kingdom, the Channel Islands or the Isle of Man if any of its securities are admitted to trading on a UK regulated market, a UK MTF or a stock exchange in the Channel Islands or the Isle of Man; for a UK MTF such as AIM, only if the company approved trading, or requested admission to trading, of its securities there. Rule 9.1 requires a mandatory offer when a person acquires an interest in shares which, with those of persons acting in concert with it, carry 30 per cent or more of the voting rights, which an enforcement could in principle trigger for a lender.
The Notes on Dispensations from Rule 9 deal with this directly. Where shares are charged as security for a loan and, as a result of enforcement, the lender would otherwise incur an obligation to make an offer under Rule 9, the Panel will not normally require an offer if sufficient interests in shares are disposed of within a limited period to persons unconnected with the lender, so that the lender and its concert parties are interested in less than 30 per cent in a manner satisfactory to the Panel. Where arrangements transfer voting rights to the lender without amounting to enforcement, the Panel will wish to be convinced that they are necessary to preserve the lender’s security and that the security was not given at a time when the lender had reason to believe enforcement was likely. A purchaser from the lender after enforcement is subject to Rule 9 in the ordinary way. These references are to the Code as at 4 February 2026.
What does this mean for a holder financing an AIM stake?
As general information, a holder financing an AIM stake faces four practical questions. The first is status: a director or other PDMR, or a person closely associated with one, notifies the pledge under Article 19 of UK MAR within three working days, stating its value at the date of the pledge where its terms allow the value to change, unless it is a custody-account security interest not yet designated to secure a specific facility. The second is timing: because the exceptions in Article 19(12) are drafted around sales, employee schemes and transfers without a change in beneficial interest, a pledge is simpler to arrange outside the 30-day closed period and with any clearance the company’s dealing policy requires. The third is structure: whether the lender takes control of the votes or legal title decides whether DTR 5.2.1R(c), the AIM definition of holding or the Takeover Code’s Rule 9 notes come into play. The fourth is enforcement: a lender’s sale can move holdings across the DTR 5 and rule 17 thresholds and, for a PDMR, raises the open questions set out above.
Where pledged shares are held during a facility is covered under where are your shares held during a stock loan, and the market-level view is on the United Kingdom stock loans page. The position described is accurate as at 27 October 2026, on the August 2026 edition of the AIM Rules for Companies and UK MAR as it then stood. UK MAR is listed for revocation under the Financial Services and Markets Act 2023 and the AIM Rules were revised in August 2026, so the position should be confirmed against the current texts and independent UK legal advice taken on any specific transaction.
Frequently asked.
01Do AIM directors have to disclose a share pledge?
02Is a pledge over shares in a custody account notifiable under UK MAR?
03Can an AIM director pledge shares during a close period?
04Does a lender have to notify a holding of pledged AIM shares under DTR 5?
05What is the significant shareholder threshold on AIM?
06Does the Takeover Code apply if a lender enforces over 30 per cent of an AIM company?
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