Quantum Solutions cedes Japan’s top ETH treasury crown after $1.9M sale

Quantum Solutions sold 1,000 ETH for around $1.9 million, and lost its status as Japan’s largest corporate holder of Ether. Def consulting is now at the top spot. The money is earmarked for the company’s buildout of an AI data center.

Quantum swaps either for Nvidia GPUs

The disposal was recorded by the Tokyo-listed technology firm via its subsidiary GPT Pals Studio on July 30, according to a company filing. On average, the tokens sold for $1,903 each. It was worth around 311 million yen, or $1.903 million.

The proceeds will go toward the company’s AI Infrastructure Data Center division, including GPU hardware. Target purchases include Nvidia’s B300 and GB300 chips, the physical backbone of the AI business Quantum has been building since June.

With the sale completed, Quantum now holds about 4,764.8 ETH. Def consulting has 4,976 ETH. And that puts Def at the forefront of publicly traded Ether holders in Japan.

GPT Pals had already dumped 904 ETH for ~$1.6 million on June 16. In less than two months, Quantum has sold 1,904 ETH in two sales. That’s around 29% of the 6,668.8 ETH it held before it began selling, and the treasury is down 28.6% since mid-June.

Pledged collateral caps what Quantum can still sell

Quantum built most of its stack during the crypto run of late 2025, when Ether traded between $4,000 and $4,500. The remaining position is ~$9.1 million with ETH trading near $1,906 at the time of writing. The company expects to record a loss of about $100,000, or 17 million yen, on the latest sale. That charge hits earnings for the quarter of its fiscal year that ends in February 2027.

Quantum’s board has extended the runway for more selling. It raised the approved ceiling from 1,875 ETH to 4,375 ETH. That makes another 2,471 ETH clear for disposal through October 30 on paper.

Of the Ether still on its books, 3,050 ETH is pledged as collateral on a prior loan with a Singaporean lender. And there are 1,714.8 ETH in the trading account of GPT Pals. This leaves the freely sellable pile over 750 ETH short of the fresh authorization. Quantum would have to free up or swap out pledged collateral or buy more Ether to get to the full amount.

Future sales depend on Ether prices and how quickly the data center build-out burns through cash. BitMEX co-founder Arthur Hayes also cut his own exposure earlier this year, dumping ~6,000 ETH at a loss as the asset traded sideways. On-chain data at the time showed other large holders still accumulating their positions.