What is the SAST takeover code and the open-offer trigger

Why the takeover code exists

When a person or group acquires a substantial stake in a listed company, or takes control of it, the value and the future of every other shareholder's investment can change overnight. The SAST regulations, commonly called the takeover code, exist to make sure the public shareholders are not left stranded when this happens. The core protection is the open offer: an acquirer who crosses a defined threshold cannot simply take control quietly, but must extend an offer to the public to buy their shares too, at a price determined by the rules, so that minority holders can exit if they do not want to ride with the new controller.

The principle is fairness in a change of control. The person taking over is usually paying a premium to the seller for the controlling block, and the open-offer requirement ensures that ordinary shareholders get a comparable chance to sell, rather than only the departing promoter cashing in. It turns a private deal between a buyer and a selling promoter into an event that includes the public.

The triggers and the open-offer size

There are two main triggers. The first is crossing 25% of the voting rights of the company: an acquirer (alone or with persons acting in concert) whose holding reaches or passes that level must make an open offer. The second is acquiring control of the company, regardless of the exact shareholding percentage, because control can be gained through board composition or agreements as well as through shares. Either trigger sets off the obligation.

When triggered, the open offer must be for a minimum of 26% of the total shares of the target company, made to the public shareholders at the open-offer price set under the regulations. So a successful acquirer can end up holding well above the trigger level once the open offer is taken up. The 26% minimum is calibrated so that a meaningful chunk of the public float gets a chance to exit, not a token slice. The open-offer price is governed by a formula based on past traded prices and the deal price, which stops an acquirer from low-balling the public after paying the promoter a premium.

Creeping acquisition and what it means for you

Above the initial trigger, the code allows controlled increases through what is called creeping acquisition. A holder who already owns more than 25% but less than 75% can acquire up to a further 5% of voting rights in a financial year without triggering a fresh open offer. This lets an established promoter consolidate gradually within limits, while anything beyond that pace brings the open-offer machinery back into play. There is also an overall ceiling tied to the minimum public shareholding the company must maintain, so a promoter cannot creep all the way to full ownership without delisting.

For a retail investor, a SAST open offer is a genuine event, not background noise. If a company you hold receives an open offer, you have a decision: tender your shares to the acquirer at the offer price, or hold on and continue as a shareholder under the new control. The open offer is a disclosed, regulated process with a defined price and window, so reading the offer document tells you the price and the timeline. Knowing that crossing 25% or taking control forces this offer is what lets you recognise, the moment a substantial-acquisition disclosure appears, that an exit opportunity at a regulated price may be coming.

Open offer versus delisting, and other triggers

It is easy to confuse an open offer with a delisting offer, but they aim at opposite outcomes. A SAST open offer is about a change of control: the acquirer wants to take over the company and is offering the public a chance to exit, but the company stays listed and the acquirer typically does not want to cross the limit that would force a delisting. A delisting offer, by contrast, is specifically an attempt to remove the company from the exchange entirely by buying out almost all the public, governed by separate delisting rules with a much higher success threshold. The same acquirer might first make an open offer to gain control and only later, as a distinct step, attempt a delisting.

There are also voluntary and indirect routes within the takeover code itself. An acquirer who already holds a stake can make a voluntary open offer to increase it, subject to conditions. An acquisition can be indirect, where control of the listed company is obtained by buying its parent or holding company, and the code reaches through to require an offer to the listed company's public shareholders too. Exemptions exist for certain situations such as inter-promoter transfers or rescue acquisitions of distressed companies. The detail varies case to case, which is why the open-offer document and the disclosure that accompanies a substantial acquisition are the documents to read, but the spine is always the same: when control moves, the public gets a regulated chance to move with it.

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