Ark Invest has expanded its stake in Circle Internet Group, the issuer of the USDC stablecoin. Through its ARKW exchange-traded fund, the firm acquired 35,403 shares of Circle for $2.9 million. This move continues a series of investments made by the company since Circle went public.

The firm previously executed significant purchases of Circle stock in 2026, including acquisitions worth $5.5 million in May and $17.3 million in August. In another recent transaction, Ark purchased 65,615 shares for approximately $5.2 million following a 7.1% decline in Circle's stock price to around $79.84.

Following these transactions, Circle accounts for roughly 4.3% of the ARKW fund's total holdings, with the position valued at approximately $67.8 million. Circle shares, traded on the NYSE under the ticker CRCL, have recently fluctuated between $80 and $82.

Concurrent with its recent acquisition of 65,615 Circle shares, Ark reduced its position in the ARKB Bitcoin ETF by approximately $15.9 million. Circle is currently pursuing a national trust bank charter to support its future operations and enhance its market credibility.