In the same week that Strategy sold bitcoin for the fourth time and Riot leased its power to an AI lab, MARA Holdings did something quieter and arguably more consequential: it pledged 18,750 BTC — about $1.2 billion of coin, and 53% of everything it holds — as collateral for $600 million of new borrowing. Corporate bitcoin-backed credit is becoming a standard treasury tool in 2026, and the filings that describe these loans are dense enough that headline coverage routinely gets the numbers wrong. This guide walks through how to read one, using MARA's August facilities as the worked example. All figures are from MARA's August 6 quarterly SEC filing as reported by crypto.news, as of August 11, 2026.
MARA pledged 18,750 Bitcoin as collateral for $600M in new borrowing. 💸 That equals about 53% of its 35,577 $BTC holdings. The loans were arranged through Coinbase Credit and Two Prime Lending.
— CryptosRus (@CryptosR_Us) August 9, 2026
First principles: what a bitcoin-backed loan is
The structure is simple in outline: a borrower posts bitcoin as collateral with a lender (or a custodian acting for the lender) and receives dollars. The borrower keeps price exposure to the coin — if bitcoin rises, the upside is theirs — but must service interest and, crucially, must keep the collateral's value above agreed thresholds. If the coin's price falls far enough, the lender issues a margin call: post more bitcoin or repay principal. Fail to do either and the lender can liquidate the collateral. It is the same mechanic that governs a retail margin account, scaled to nine figures.
Why borrow instead of sell? Three reasons dominate corporate thinking: selling realizes gains or losses (with tax and optics consequences — note that Strategy's current sales print a roughly 15% loss to basis every week); selling permanently forfeits upside; and debt lets a company fund expansion while advertising that it still 'hodls.' The trade-off is that borrowed dollars come with covenants, interest, and a liquidation trigger that a simple sale doesn't have.
The five numbers to find in the filing
1. New money versus headline principal. MARA's two facilities carry $750 million of combined principal — but only $600 million is new borrowing. Coinbase Credit provided a $450 million facility consisting of $300 million in fresh funding plus a refinancing of MARA's existing $150 million credit line; Two Prime Lending provided a fully drawn $300 million term loan. Coverage that says '$750M loan' and coverage that says '$600M loan' are describing the same deal from different angles. Always separate the new liquidity from the reshuffled debt.
2. The collateral count, and what share of the treasury it is. 18,750 BTC secures the facilities — roughly $1.2 billion at the time of the deal, and about 53% of the 35,577 BTC MARA reported holding at June 30. That percentage is the single most important risk number in the filing: it tells you how much of the company's flagship asset is now encumbered. For context, MARA already had 4,528 BTC pledged elsewhere and 4,742 BTC out on loan before these facilities.
3. The rate structure. Two Prime's $300 million is fixed at 7.65%. Coinbase's facility floats at the midpoint of the federal funds target range plus 3.875% — with the Fed's range at 3.50–3.75%, that's about 7.5% today, but it moves with every FOMC decision. At current rates, full drawdown implies roughly $56.7 million in annual interest (a calculated figure, not company guidance). A fixed/floating split like this is a small bet on the rate path: if the Fed's next move is the hike that three dissenters wanted in July, the Coinbase leg gets more expensive.
4. Maturity and extensions. Both loans mature in August 2028 — Two Prime on August 3, Coinbase on August 4, with the Coinbase facility auto-extending a year unless either party cancels. Two years is long enough to span a bitcoin cycle leg in either direction.
5. The margin-call and default language. MARA must maintain agreed collateral ratios; if pledged value falls below the margin-call limits it must add collateral or take other permitted action, and failure is an event of default allowing the lenders to liquidate pledged bitcoin. Here is the detail readers should notice: the filing does not disclose the exact thresholds. Public information therefore cannot tell you the bitcoin price at which MARA gets the call. Whenever a filing withholds that trigger, treat any confident third-party 'liquidation price' as a guess.
The LTV math, illustrated
Loan-to-value is the lender's yardstick: principal divided by collateral value. Using the full $750 million principal against 18,750 BTC, here is how LTV moves with price — illustrative math only, since actual thresholds are undisclosed:
| BTC price | Collateral value (18,750 BTC) | LTV vs $750M principal |
|---|---|---|
| $64,000 (≈today) | $1.20B | 62.5% |
| $75,000 | $1.41B | 53.3% |
| $55,000 | $1.03B | 72.7% |
| $45,000 | $0.84B | 88.9% |
| $40,000 | $0.75B | 100% |
Note that at deal pricing the starting LTV was roughly 50% on the $600 million of new money — a conservative opening ratio by crypto-lending standards, which typically run 40–70% for institutional facilities. The table shows why the undisclosed threshold matters: somewhere between today's price and $40,000, a call arrives, and each margin call answered with more coins raises the encumbered share of the treasury above 53%.
https://www.youtube.com/watch?v=SKTHSQoXaFw
What the money is for — and the deadline behind it
MARA says proceeds are for general corporate purposes including part of the cash consideration for its planned acquisition of Long Ridge Energy & Power in Hannibal, Ohio — a deal announced in April at an enterprise value of about $1.5 billion including up to roughly $900 million of assumed debt, with a Barclays commitment for a 364-day bridge facility of up to $785 million as backstop. There's a clock: MARA could owe a $75 million termination fee if the acquisition isn't completed by November 30, 2026 (extendable to June 30, 2027 on regulatory grounds). Read together, the loan is the bridge between MARA's bitcoin balance sheet and its AI-and-energy buildout — the same pivot Riot just monetized with its reported Anthropic lease, funded a different way.
Borrowing is also not replacing selling: MARA sold about 23,093 BTC for $1.6 billion in the first half of 2026 to fund operations. The treasury is a working capital source on every margin at once — sold, lent, and pledged.
One treasury, three playbooks
It helps to place MARA's choice on the spectrum the market offered this same week. Strategy is selling: 1,690 BTC last week at an average $64,262, its fourth consecutive weekly disposal, realizing roughly a 15% loss to its cost basis to defend a preferred stock. Riot is leasing: converting its power capacity into a reported $9.1 billion, 20-year AI data center contract without touching a bitcoin stack it valued at roughly $666 million at quarter-end. MARA is borrowing: keeping its remaining coins but encumbering half of them to fund an energy acquisition. Same asset, three different answers to the same question — how do you turn a bitcoin treasury into growth capital? Each answer has a distinct failure mode: the seller forfeits the recovery, the landlord takes counterparty and buildout risk, and the borrower takes liquidation risk. When you read the next miner filing, identifying which playbook is in use — and which failure mode management has accepted — is most of the analysis.
The history lesson: why the 2022 vintage matters
Miner lending has been here before. In 2021–22, miners borrowed heavily against both coins and rigs; when prices halved, margin calls cascaded — lenders like Celsius and BlockFi failed, and several miners restructured. The structural differences this cycle: opening LTVs are lower, lenders are larger and better capitalized, and the collateral is liquid spot bitcoin rather than illiquid mining hardware. The structural similarity: a levered bet that bitcoin's price stays above an undisclosed line. Both things are true, and a reader of these filings should hold them simultaneously.
https://www.youtube.com/watch?v=vfEDTTYyNhw
Checklist: reading any bitcoin-backed corporate loan
| Question | Where to look | MARA answer |
|---|---|---|
| How much is genuinely new money? | Facility descriptions in the 10-Q/8-K | $600M of $750M principal |
| What share of the treasury is encumbered? | Collateral count vs holdings | 18,750 of 35,577 BTC (~53%), plus prior pledges/loans |
| Fixed or floating? | Interest rate terms | $300M fixed 7.65%; $450M floating ~7.5% today |
| When is it due? | Maturity clauses | August 2028, one auto-extension |
| Where is the margin call? | Collateral maintenance covenants | Not disclosed — the key unknown |
FAQ
Does pledging bitcoin mean MARA sold it? No. Pledged coins remain MARA's assets unless a default triggers liquidation. But they are no longer free to sell or move while pledged.
What happens if bitcoin's price drops sharply? MARA must post additional collateral or reduce principal to restore the required ratio. Failure would be an event of default, permitting Coinbase or Two Prime to liquidate pledged coins.
Is a 50% starting LTV safe? Safer than the 2021–22 vintage, but 'safe' depends on the undisclosed margin-call threshold and bitcoin's drawdown behavior — a 33% fall from current prices took place within single quarters in past cycles.
Why not just sell the bitcoin instead? Selling forfeits upside and realizes losses at prices well below many corporate cost bases. Borrowing preserves exposure at the cost of interest and liquidation risk — MARA is notably doing both.
Do these loans affect the bitcoin market itself? Directly, pledged coins are supply taken off the market (they can't be sold while pledged). Indirectly, they create conditional supply: a deep price drop can force liquidations, adding sell pressure exactly when the market is weakest.
Where can I verify these numbers myself? The primary source is MARA's quarterly filing on the SEC's EDGAR system, filed August 6, 2026. Secondary coverage with the facility breakdown is at crypto.news, linked above. Always prefer the filing when a headline number conflicts with it.
Disclaimer: This article is for informational and educational purposes only and does not constitute investment, financial, or legal advice. Cryptocurrency markets are volatile and carry significant risk, including the possible loss of principal. Always do your own research and consult a licensed financial advisor before making investment decisions.