Stablecoin Market Cap Tops $323.3 Billion as Weekly Inflows Log $1.5 Billion

In a remarkable display of growth, the stablecoin market surged to unprecedented heights, reaching a staggering $323.343 billion in the past week, fueled by an influx of $1.542 billion in new capital. Tether's $USDT maintained its stronghold on the market, accounting for approximately 58.67% of the total stablecoin market share, despite only experiencing a modest 0.04% increase in value.

A notable performer during this period was Sky's USDS, which saw an impressive 11.5% jump, propelling its market capitalization to $8.79 billion and bringing it tantalizingly close to the $10 billion milestone. In contrast, Circle's $USDC suffered a decline of 1.22%, resulting in a loss of over $950 million and a market capitalization of $77.068 billion, representing a 1.98% decrease since April 16.

Western Union's USDPT made headlines with a staggering 597,568% increase, although its market capitalization remains relatively modest at $1.5 million. Tether's dominance in the stablecoin sector was further solidified, with its market capitalization standing at $189.7 billion after adding $68.2 million since May 9.

Other notable stablecoins experienced significant fluctuations, with Sky's $DAI, the fourth-largest stablecoin, shedding $46 million in value, while $USD1 from World Liberty Financial gained 1.97% and saw its market capitalization rise to $4.52 billion. USDe from Ethena climbed 6.77%, and PYUSD from Paypal advanced 1.32%, while BUIDL from Blackrock and USDG from Global Dollar recorded increases of 8.01% and 9.63%, respectively. USYC from Circle experienced a minor decline of 0.30%. As of May 16, 2026, these developments have significantly impacted the stablecoin landscape, according to data from defillama.com.