The offering of shares by existing shareholders typically does not involve the issuance of new shares, so the company does not receive proceeds from the sale. However, such sales can increase the stock's liquidity, which might be positive. On the other hand, the market may perceive the increase in available shares as a dilution of value, especially if demand does not match the increased supply, which could lead to a decrease in the stock price. The impact is considered significant due to the potential dilution and the number of shares being offered.