Quantum Solutions, a publicly traded company in Japan, has expanded its Ethereum holdings by 500.43 ETH through its subsidiary, GPT Pals Studio Limited. The purchase, made on October 23rd, amounted to $1.9255 million, bringing the company's total Ethereum holdings to 4,366.27 ETH, valued at approximately $17.7798 million. The average acquisition price was $4,072.09 per ETH.