Aeration activates undesirable microorganisms that cause silage spoilage, which can be seen by the increase in silage temperature. In addition, aeration decreases the concentration of lactic acid and volatile fatty acids (VFA). Lactic acid is the main preservative acid, while acetic acid provides longer aerobic stability of silage. Lyophilized lactic acid bacteria are used as inoculants in the production of silage. In this way, proper fermentation and acid production, as well as higher aerobic stability of silages, are enabled. The aim of this study was to investigate the influence of the addition of the inoculant Lactiplantibacillus plantarum during silage preparation on the aerobic stability of high-moisture corn during the seven-day aeration period. Changes in the concentrations of lactic acid, VFA, ethanol, and methanol in silages with and without the addition of the inoculant were observed over a 7-day period, quantified by the HPLC method, as well as ST and the temperature of the silage. Throughout the aeration period, the silages remained stable, as the temperature in the silages was not 2 °C higher than the ambient temperature. Silage dry matter remained stable throughout the period (P=0.257), whereas all other parameters showed significant changes during aeration (for all parameters P<0.001 except for propionic acid P=0.024 and methanol P=0.012). Silages with inoculant addition had higher lactic acid concentration than control silages throughout the aeration period (P<0.001), while VFAs and alcohols were higher in control silages (acetic and propionic acid P=0.002; alcohols P<0.001), indicating that ensiling was homofermentative in silages with inoculant addition. At the end of aeration, lactic acid concentrations were twice as low in control silages compared to the beginning (11.05 vs. 6.84 g/kg DM), while they remained stable in inoculated samples (18.24 vs. 17.96 g/kg DM). During aeration, acetic acid concentration decreased in the silages with inoculant (from 1.30 to 0.91 g/kg DM), while in the control silages there was an increase in acetic acid (from 1.90 to 2.61 g/kg DM). Propionic acid, methanol and ethanol showed similar changes in silages with inoculant and control silages, but with different intensity. The research results show that although the silages remained stable throughout the aeration period, the addition of inoculants affected the temperature changes in the silages as well as the changes in acids and alcohols. It can be concluded that the addition of inoculants during ensiling affects the change of acids and alcohol and the aerobic stability of silage during aeration.