Bitcoin (BTC) Miners MARA, CleanSpark Post $851 Million Loss

Bitcoin (BTC) miners MARA Holdings and CleanSpark disclosed heavy quarterly losses on August 6, adding to a weak stretch across the broader Bitcoin mining sector as weaker token prices produced large non-cash writedowns. MARA's second-quarter result was a $611.3 million net loss, equal to $1.60 per share, reversing an $808.2 million profit from the same period last year. Revenue declined 27% to $174.9 million, and the company linked about $343 million of the shortfall to lower valuations on its Bitcoin treasury. CleanSpark's fiscal third quarter produced $138 million in revenue, a 30.5% annual decline, and a $239.8 million net loss. Adjusted EBITDA fell to negative $113 million, while a fair-value loss on Bitcoin exceeding $116 million deepened the damage. Taken together, the two producers recorded $851.1 million in net losses, with roughly $459 million tied to Bitcoin fair-value reductions, underscoring how balance-sheet exposure can amplify a bear-market phase for listed miners. The disclosures followed similarly weak results earlier in the sector, including Hut 8's own quarterly loss, and they arrived after a period in which Bitcoin's retreat from prior highs reduced the carrying value of corporate treasuries. In regular Thursday trading, MARA shares declined 5.25% to $10.65 and CleanSpark fell 5.56% to $12.75, though both tickers firmed slightly after the results were released.

The earnings pressure has not paused the sector's push into artificial intelligence and data-center leasing, giving Bitcoin exposure a second possible revenue line. CleanSpark secured a $6.6 billion, 20-year lease tied to its Sandersville site, with an investment-grade tenant intended to provide long-duration cash flow. MARA, meanwhile, has framed mining and AI infrastructure as complementary uses of power rather than rival businesses. The company operates 19 data centers and controls rights to a 2-gigawatt location in Texas, giving it scale to market electricity and compute capacity to large customers. Other listed miners are moving in the same direction. TeraWulf derived 71% of its $44.8 million quarterly revenue from high-performance computing rentals, while its two-decade Anthropic contract is valued at about $19 billion in future revenue. Core Scientific reported $1.155 billion in net losses against $164.2 million of revenue and disclosed an AMD agreement covering as much as 2.5 gigawatts of capacity. The pattern shows miners trying to convert ASIC mining sites into multi-purpose energy and compute assets, even though most AI leasing revenue will arrive in later years. That timing matters because the contracts are meant to offset shrinking mining margins, but they also require capital, construction discipline and tenant delivery before the full financial benefit appears.

MARA's filing detail shows how the price slump, following Bitcoin's retreat from its all-time high, masked operational progress. MARA's 10-Q SEC filing showed a $611.3 million second-quarter net loss, compared with $808.2 million of net income a year earlier, while diluted earnings per share moved from $1.84 to negative $1.60. Production increased: MARA produced 2,422 Bitcoin during the period, a 3% annual increase, but management said an approximate 28% decline in the average Bitcoin price outweighed the higher output. Its balance sheet held 35,577 Bitcoin valued at $2.1 billion on June 30, making it the fourth-largest public corporate holder behind Strategy, Twenty One Capital and Metaplanet. CFO Salman Khan described the quarter as defined by difficult pricing and a reshaped power portfolio. MARA is also pursuing AI and high-performance computing through its Exaion acquisition, a Starwood partnership and a pending $1.5 billion Long Ridge Energy and Power deal, while targeting at least two AI or HPC leases before year-end. The company's Matagorda County land deal is expected to provide access to as much as 2 gigawatts by April 2028. Chief Executive Fred Thiel added that mining remains the core cash-flow business, with each megawatt directed toward its highest-value application, whether Bitcoin production, AI infrastructure, sovereign cloud or enterprise computing.

On-chain data from the same week revealed that MARA and Riot Platforms collectively deposited 581 BTC—valued at approximately $37 million—to institutional custodian NYDIG, with MARA contributing 200 BTC and Riot adding 381 BTC in a single day. Analysts generally interpret such custodian transfers as a precursor to selling, since NYDIG's liquidity services enable large holders to offload coins without directly impacting exchange order books. Riot had executed a comparable 500 BTC transfer to NYDIG in July, consistent with a recurring pattern of raising capital to fund its AI data-center transition. The combined activity suggests that near-term selling pressure from major listed miners may persist even as Bitcoin has stabilized from earlier quarterly lows.

CleanSpark's quarterly revenue also fell short of Wall Street expectations, with analyst consensus compiled by Yahoo Finance at $142.2 million against the reported $138 million, marking a second consecutive loss-making quarter after a $378.3 million net loss in the fiscal period ended March 31. Despite the sustained earnings pressure, the company expanded its infrastructure footprint, securing 585 megawatts of ERCOT-approved Texas capacity for additional AI and high-performance computing projects while doubling its contracted megawatts year over year. CleanSpark's Bitcoin holdings grew 14% from a year earlier, with average monthly hashrate climbing 18%, and the company ended the March quarter holding $925.2 million in Bitcoin alongside $260.3 million in cash. Shares recovered roughly 3% in Friday pre-market trading to above $13.10 after Thursday's decline.

(as of 11:07 UTC) COINOTAG's analysis ties these disclosures to one theme: listed Bitcoin miners are trying to turn volatile block rewards into contracted compute revenue while their treasuries absorb price swings. The primary record supports that tension. MARA's 10-Q filing states the company mined 2,422 BTC and held 35,577 BTC worth $2.1 billion as of June 30, yet still recorded a $611.3 million quarterly loss. CleanSpark's $6.6 billion Sandersville lease adds a long-term offset, but future AI revenue remains largely deferred. The key variable is whether power contracts can stabilize cash flow before further Bitcoin drawdowns create additional non-cash losses.