On-chain data from Santiment and CryptoQuant reveals a striking divergence between Bitcoin and Ethereum exchange supply trends in May 2026. While Bitcoin’s exchange balance remains at a multi-year low, Ethereum’s supply has risen sharply, signaling a potential shift in holder behavior.
Bitcoin exchange supply currently sits at 5.623%, the lowest level since 2018, according to Santiment. Despite brief periods of positive net inflows—such as the +2.5K to +4K BTC daily bars between May 11 and May 14—the percentage has held flat. This indicates that deposit and withdrawal pressures are evenly matched, with an active holder base absorbing exchange deposits rather than a passive accumulation pattern.
In contrast, Ethereum exchange supply climbed from 4.2% to 4.6% within just ten days. The catalyst was a single-day inflow spike on May 10 of approximately 240,000 ETH, the largest bar on CryptoQuant’s netflow chart covering April 15 to May 16. Although subsequent days showed net outflows (the most recent reading is -14.2K ETH), they have not been sufficient to reverse the supply accumulation triggered by that spike.
This divergence is significant because both assets were previously declining in exchange supply in tandem. The rise in ETH exchange balances—while still near historic lows since 2015—suggests that ETH holders may be entering a distribution phase, moving coins to exchanges for potential selling or active trading. Meanwhile, Bitcoin’s flat supply at an 8-year low signals continued long-term accumulation and resilience against short-term volatility, including a PPI-driven price shock and recovery above $82,000.
Analysts caution that if Ethereum exchange supply remains above 4.5% through the end of May with further large inflow spikes, the divergence would become structural, indicating a behavioral split between the two largest cryptocurrency holder bases.
