They can demand it in general meetings.
"A minority of the shareholders have the right to demand a so called minority dividend to be distributed. Such right belongs to shareholders having at a minimum one tenth (1/10), or a lesser amount stipulated in the articles of association, of all the shares in the company. Half of the profits of the financial period, deducted by the items that according to the articles of association shall be left undistributed, may be demanded to be distributed to the shareholders as a minority dividend.
A shareholder may not, however, demand a sum exceeding eight per cent (8 %) of the company’s equity to be distributed as dividend. A condition for a minority dividend to be distributed is furthermore that the company has distributable assets and that the distribution does not compromise the solvency of the company. Possible dividends distributed for the financial period prior to the annual general meeting shall be deducted from the amount to be distributed.
The demand concerning the distribution of a minority dividend shall be presented at the annual general meeting before making the resolution on the use of the profits. The demand of the minority may only be directed to the profit of the previous financial period but not to other distributable assets indicated on the balance sheet.
The articles of association may have differing provisions regarding minority dividends. This means that the rights of minority shareholders may be both improved and restricted by a provision in the articles of association. The right to a minority dividend may, however, be restricted only with the consent of all shareholders."
Link:
https://virtuallawyer.fondia.com/en/articles/minority-dividend