Bitcoin's Q3 Rally Ran on ETFs, Not Corporate Treasuries, 21Shares Says

Bitcoin's third-quarter surge had a new engine, and it wasn't the corporate treasury crowd. Research from 21Shares credits U.S. spot ETFs with driving the rally, as the coin climbed 42.7% over the quarter to close at $83,570 on Sept. 30. Those funds pulled in 79,800 BTC worth $6.2 billion — nearly triple the 41,300 BTC, valued at $2.9 billion, that miners brought into circulation over the same stretch.

The flip is dramatic. In the second quarter, the same ETF suites bled $4.8 billion in outflows, according to the 21Shares report. The comeback wasn't a steady drip either: two short windows, Aug. 17-27 and Sept. 21-25, accounted for 91% of all third-quarter ETF inflows measured in Bitcoin. Blink and you'd miss the buying.

Corporate treasuries went the other way. Purchases by listed companies holding Bitcoin on their books slid from $7.1 billion in Q2, landing near $1 billion in Q3. Strategy was the tell — it added just 1,700 BTC, about $240 million, after offloading $349 million across July and August.

Stack it up and ETFs plus treasury firms added roughly $7.2 billion in value during the quarter, about 2.4 times the worth of freshly mined Bitcoin. Someone was on the other side of that trade. Long-term holders trimmed 248,000 BTC worth $17.4 billion, and even while selling into strength, investors booked $9.3 billion in net realized profits — the first quarterly net gain of 2026.

21Shares' read on market health is murkier than the price chart. The MVRV ratio sat at 1.56x, below its historical median of 1.71x going back to 2013, and the firm flags the $97,000 holder-cost area as a spot where selling pressure could build. Roughly 30% of supply was still underwater when the quarter ended.

Derivatives told their own story: futures made up 88.2% of the quarter's $4 trillion in trading volume, which 21Shares says makes ETF flows the cleaner gauge of real demand. On-chain, transaction counts rose year over year, but transfer values, active addresses and public Lightning Network capacity all slipped.