Bitcoin miner MARA Holdings sold 13,597 bitcoin after the third quarter ended, at around $81,039 each, for proceeds of about $1.1 billion, its Q3 2026 shareholder letter filed with the SEC on 9 November says. By our arithmetic, that is 40% of the 34,012 bitcoin it held at the end of September.

Most of the cash went to debt, not data centres: MARA says it used $750.0 million to fully repay its bitcoin-collateralized term loans, about 68% of the proceeds by our arithmetic, which released 17,477 bitcoin that had been pledged as collateral.

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The key insight: As we read the letter, the sale was mainly a balance-sheet move: $750.0 million of the roughly $1.1 billion repaid bitcoin-backed loans, which MARA says left less than 5% of its bitcoin holdings loaned or pledged.

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What MARA Says the Rest Is For

MARA says it intends “to continue using bitcoin to build cash for purposes such as AI infrastructure opportunities”, to cover puts on its convertible notes that become exercisable next year, and for potential share repurchases. After the quarter its board authorized a buyback of up to $500.0 million, the letter says.

The letter also says “this is not a pivot away from bitcoin” and calls mining a way to monetize power while it develops higher-value infrastructure. By our arithmetic, about $350 million of the proceeds was left after the loan repayment; the letter does not say how that cash will be split.

The Power Behind the AI Plan

MARA says it owns and operates about 1 GW of sites and expects the portfolio to reach over 4 GW, subject to closing the Long Ridge purchase and energizing a site in Matagorda County, Texas. Long Ridge, a natural gas plant, is authorized to sell 485 MW, rising to its 505 MW nameplate in the first half of 2027, the letter says; Matagorda has rights to up to 2 GW of power capacity.

Its Exaion unit signed a four-year $79 million GPU-as-a-service contract on 100% take-or-pay terms with its first U.S. customer, and MARA describes a pipeline of over $3 billion as indications of demand that are not yet contracted. Miners selling power to AI customers is a pattern we have covered before, as in Riot Platforms’ 191 MW deal with Anthropic.

The Numbers in Context

In the third quarter itself, MARA produced 2,247 bitcoin and sold 3,891 at an average price of $75,300, the letter says. By our arithmetic, the post-quarter sale was about 3.5x the quarter’s sales. Year to date, MARA says it has cut total debt by $1.4 billion, or 37%.

Q3 revenue was $164.2 million, down 35% from $252.4 million a year earlier, and net income was $632.1 million, the letter says. Energized hashrate was 71.2 EH/s, up 18% from a year earlier.

The Structural Read

As we read it, the AI plan rests on power MARA does not yet fully control: growth from about 1 GW to over 4 GW depends on closing Long Ridge and energizing Matagorda, the letter says.

As we read the Exaion figures, the contracted part of the GPU business is small beside the pipeline: a four-year $79 million contract against an over-$3 billion pipeline that MARA says is not yet contracted.

MARA Holdings, Q3 2026 shareholder letter

“Bitcoin remains our operating foundation and a flexible way to monetize power while we develop higher-value infrastructure opportunities”

Three Implications

FOR MARA’S BALANCE SHEET MARA says it has cut total debt by $1.4 billion, or 37%, this year, and the repayment released 17,477 pledged bitcoin.

FOR THE BITCOIN IT SELLS The 13,597 bitcoin sold after the quarter compare with 3,891 sold during it, about 3.5x by our arithmetic.

FOR AI INFRASTRUCTURE MARA says it intends to keep using bitcoin to build cash for purposes such as AI infrastructure opportunities.

The Business Engineer Lens

This story maps onto the Business Engineer framework The State of AI Data Centers.

The framework says: “Companies that solve the power equation will dominate the AI era; those that don’t will watch their chips sit idle.”

As we read it, a miner with about 1 GW of sites selling bitcoin to clear debt is one example of a company positioning around power; the framework does not discuss this story.

What Is Not Established

The letter does not give the exact dates of the sale or the buyers. The 40% figure compares the sale with holdings at 30 September, which include digital assets receivable; the letter does not give a post-sale holding. The Exaion pipeline is not contracted, MARA says. Posts on X describing the sale as paying for AI data centres overstate what the letter says: most of the proceeds repaid debt.

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The Bottom Line

MARA sold 13,597 bitcoin for about $1.1 billion after the quarter and used $750.0 million to repay bitcoin-backed loans, its shareholder letter says; it intends to keep using bitcoin to build cash for AI infrastructure opportunities, convertible-note puts and potential buybacks.

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A note on sourcing. Figures come from MARA Holdings’ Q3 2026 shareholder letter, furnished with a Form 8-K filed with the SEC on 9 November 2026, read in full on 15 November 2026. Percentages, the remainder and ratios are our arithmetic.

Sources: MARA Holdings, Q3 2026 shareholder letter (SEC Form 8-K Ex. 99.1, 9 Nov 2026) · MARA Holdings, Q3 2026 results announcement (Ex. 99.2, 9 Nov 2026)

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