I received a dividend from an Israeli company but only got 75% of what was declared. Is that correct?

Yes, this is typically correct if no treaty exemption applies. The standard Israeli withholding tax on dividends paid to non-residents holding less than 10% of the company is 25%, which explains the 75% net payment. If your country has a tax treaty with Israel that provides for a lower rate, you may be entitled to reclaim the difference by applying to the Israeli Tax Authority. Start by obtaining a certificate of tax residence from your home country's tax authority.