TLDRArk Invest purchased 217,896 Circle shares worth about $13.7 million across its ARKK, ARKW, and ARKF ETFs.Ark Invest sold 85,319 Robinhood shares valued at approximately $9.8 million during the same trading session.Circle stock declined 1.65% on the day and extended its monthly losses to over 20%.Robinhood shares rose 1.39% to close at $115.11 as Ark reduced its position.Ark Invest has deployed more than $37 million into Circle stock over the past two months.The firm continues to rebalance holdings to ensure no single asset exceeds 10% of its ETF portfolios.Cathie Wood’s Ark Invest increased its exposure to Circle Internet Group while reducing its position in Robinhood on Thursday. The firm disclosed a purchase worth about $13.7 million alongside a partial divestment in the trading platform. The move reflects Ark Invest’s ongoing portfolio adjustments across its exchange-traded funds.Ark expands Circle position across key ETFsArk Invest purchased 217,896 shares of Circle across ARKK, ARKW, and ARKF funds. The transaction totaled about $13.7 million based on the stock’s closing price of $63.01. Ark Invest executed the trade as Circle shares declined during the session.Circle stock fell 1.65% on Thursday, extending its one-month drop to over 20%. The decline followed the launch of Open USD, a competing stablecoin backed by several major financial firms. Ark Invest added shares during this period of downward price movement.The purchase adds to earlier acquisitions made by Ark Invest in recent months. The firm bought approximately $18 million worth of Circle shares on July 1. It also invested about $5.5 million following the company’s earnings release in May.Robinhood stake reduced as shares riseArk Invest sold 85,319 shares of Robinhood during the same trading session. The transaction carried an estimated value of $9.8 million based on market prices. Ark Invest reduced its exposure as Robinhood shares moved higher.Robinhood stock closed at $115.11, reflecting a 1.39% gain on the day. The sale occurred as the stock traded near recent highs. Ark Invest adjusted its holdings in line with its portfolio allocation rules.The firm maintains a policy limiting individual holdings to 10% of a fund’s total value. Therefore, Ark Invest rebalances positions when price movements shift asset weightings. This approach ensures diversification across its actively managed ETFs.Market context and Circle fundamentalsCircle operates as the issuer of USDC, one of the largest stablecoins in circulation. The company went public in 2025 and experienced significant price gains after listing. However, Ark Invest entered the stock below earlier peak levels.Circle’s business model depends heavily on interest income from reserves backing USDC. As a result, revenue fluctuates with changes in broader interest rate conditions. Ark Invest continues to accumulate shares despite these structural dependencies.The company also faces competition from Tether, which leads the global stablecoin market share. Meanwhile, new entrants such as Open USD have increased competitive pressure. Ark Invest has continued purchases during this evolving market environment.Continued accumulation signals portfolio strategyArk Invest has deployed over $37 million into Circle shares within roughly two months. The recent purchase forms part of a broader accumulation trend in the stock. Ark Invest has steadily increased its exposure through multiple transactions.The firm’s strategy involves reallocating capital between assets based on market movements. It sold Robinhood shares while increasing its Circle position during the same session. Ark Invest applied this approach across its ETF portfolios.The latest filings show Ark Invest maintaining active adjustments within its holdings. The firm continues to rebalance positions as prices fluctuate across sectors. These transactions highlight Ark Invest’s ongoing portfolio management activity.The post Ark Invest Adds Circle Holdings While Trimming Robinhood Position appeared first on Blockonomi.