Background <p>Stable isotopes are widely applied in various fields. Unfortunately, their concentration in gas centrifuge cascades raises a&#xa0;number of problems. One of them is the enrichment of isotopes with intermediate masses, associated with their concentration in additional products of a&#xa0;multi-stream cascade.</p> Aim <p>To develop a&#xa0;calculation method for a&#xa0;multi-stream squared-off cascade with several additional products.</p> Materials and methods <p>Isotopes of ^92–100Mo contained in a&#xa0;seven-component mixture of molybdenum hexafluoride were studied. A&#xa0;computational experiment included the simultaneous concentration of ⁹⁵Mo and ⁹⁶Mo in two additional products of a&#xa0;three-section cascade.</p> Results <p>The results of the study have demonstrated the concentration of ⁹⁵Mo and ⁹⁶Mo above 59.5% achieved in additional products of the considered 60-stage cascade. Concentration can be carried out effectively without stream swirling at the section boundaries.</p> Conclusion <p>The proposed method can solve the problem of simultaneous concentration for intermediate components in several additional products of a&#xa0;single squared-off cascade. The developed method needs verification.</p>