Bitcoin Miner Selling Pressure in 2026: $1.78B Dump, Record Sales, and What Comes Next

Comparison to ETF Outflows

The miner selling is significant but smaller than the institutional exit. U.S. spot Bitcoin ETFs saw net outflows exceeding $4.4 billion over a 13-day streak in May–June 2026, and cumulative first-half outflows exceeded $5.4 billion . The ETF outflows thus dwarf miner sales by roughly 2.5–3x in dollar terms. The two-month total for May–June alone approached $6.5 billion . However, unlike the ETF outflows, which slowed after their June peak, miner selling is structurally driven and likely to persist .

Marathon Digital (MARA) — The Dominant Seller

MARA Holdings, the world's largest publicly traded Bitcoin miner, accounted for the lion's share of miner sales. It sold 23,093 BTC for approximately $1.63 billion in the first half of 2026, at an average price of ~$70,631 per BTC, per its August 6 Form 10-Q filing . This cut MARA's reserves from 53,822 BTC to 35,577 BTC — a 34% reduction . Proceeds were used to pay down debt, fund operations, and pivot toward AI infrastructure . MARA also posted a $1.87 billion net loss for the period . The bulk of the sales — 15,133 BTC worth nearly $1.1 billion — occurred in March to repurchase convertible notes . MARA also secured $600 million in loans from Coinbase and Two Prime, backed by 18,750 BTC, signaling a shift from pure accumulation to a hybrid treasury strategy using both sales and collateralized loans .

Miner Profitability Crisis

• Transaction fees made up just 0.69% of miner revenue as of August 11, 2026, near a 10-year low, according to Glassnode data . Fees have been below 1% of miner revenue for almost a year . Glassnode co-founder Rafael Schultze-Kraft noted that Bitcoin was below $400 the last time fee share was this low . The only lower figure was 0.52% in April 2026 . Daily Bitcoin transaction fees fell to just 2.443 BTC in early April, down 69% year-over-year .
• Production cost: JPMorgan estimated the all-in production cost at roughly $78,000 per BTC as of June 2026 . CoinShares estimated the weighted average cash cost among publicly listed miners at approximately $79,995 per BTC in Q4 2025 . Other estimates range from $32,000–$59,000 at $0.07/kWh excluding capex, with the spread driven by hardware efficiency . The $78,000–$80,000 range likely reflects fully loaded costs for less efficient operators.
• Spot price: Bitcoin was trading just under $64,000 in mid-August 2026, down approximately 27% year-to-date and roughly 18% below the estimated production cost — meaning many miners are mining at a loss . JPMorgan noted that Bitcoin traded below estimated mining cost for five consecutive months, leaving roughly one in five miners unprofitable .

Outlook for Further Selling Pressure

The outlook remains bearish on the supply side for several reasons:

• Structural cost-driven selling: With fees at decade lows and production costs above spot, listed miners have little choice but to keep liquidating BTC to cover operating expenses and service debt . Hashprice, the revenue a miner earns per unit of computing power, fell to post-halving lows in the high-$20s per petahash per day by mid-2026, well below the roughly $35 breakeven threshold .
• ETF outflows: Institutional outflows have slowed from their June peak but remain a persistent drain. First-half outflows totaled $5.4 billion . Q1 institutional holdings in BTC ETFs fell 17% . The selling was broad, with hedge funds cutting positions by 31,400 BTC (down 39%) and brokerages reducing by 18,800 BTC (down 53%) .
• Corporate treasury disposals: Strategy (formerly MicroStrategy) and other corporate holders have also been selling, adding further supply . Strategy sold Bitcoin for the first time since 2022 during the same period .
• MARA's pivot: MARA signaled it will not purchase additional mining hardware and is pivoting to AI, implying reduced BTC accumulation and continued treasury monetization . The company announced it will not purchase additional mining hardware and is pivoting instead toward AI infrastructure, with proceeds from Q1 sales used to cut total debt from $3.3 billion to $2.3 billion, a 30% reduction .
• No capitulation signal — yet: Hashrate declines have been controlled rather than showing full miner capitulation, suggesting the selling is orderly but persistent . Bitcoin analyst Axel Adler Jr. noted that miners face tighter economics, yet the hashrate decline remains controlled rather than showing signs of major capitulation . The risk is that a further price drop could trigger forced liquidations from over-leveraged operators.

The consensus across sources is that miner selling, ETF outflows, and corporate treasury sales together form a persistent multi-source supply overhang that continues to weigh on Bitcoin's price recovery unless demand materially reaccelerates .