Strategy just disclosed its largest single-week Bitcoin purchase in recent filings. The May 18, 2026 8-K covers the period May 11 through May 17 and reports 24,869 BTC acquired at an average price of $80,985 per coin, for a total outlay of approximately $2.01 billion. Every dollar came from ATM equity proceeds.

Aggregate holdings now sit at 843,738 BTC. The all-in average cost across the entire position is $75,700 per coin, with a total aggregate purchase price of approximately $63.87 billion, per the same filing.

The ATM Is Doing the Heavy Lifting

The purchase mechanics matter as much as the size. Strategy is running two overlapping ATM facilities. The existing program is the active vehicle. The March 23, 2026 $MSTR Increase, a new $21.0 billion offering, sits behind it and cannot begin until the current facility is substantially depleted. That sequencing means the company has a long runway of equity-funded acquisition capacity before it needs to tap the debt markets or launch a new capital raise.

The filing notes that net proceeds are presented after sales commissions, so the $2.01 billion figure is the net amount deployed into Bitcoin, not gross ATM receipts. That distinction matters when modeling the actual BTC acquired per dollar of dilution.

Position Scale Against the Last Filed Valuation

For context on position scale: Strategy disclosed an aggregate fair market value of approximately $64.04 billion as of April 26, 2026, per the May 6 10-Q, at a per-BTC price of $78,258. The May 18 8-K adds roughly 24,869 BTC on top of that base, acquired at a higher average cost of $80,985. The current position is larger than the April 26 snapshot in both coin count and total cost basis.

The BTC Exposure Score for $MSTR sits at 85, reflecting that Bitcoin is the central variable in the equity's research case. That score is not a directional view. It describes how completely the balance sheet is organized around Bitcoin price movements, and at 843,738 BTC, the answer is: almost entirely.

Filing Cadence Signals Ongoing Capital Activity

$MSTR's Filing Risk Score is at the ceiling, driven by the density of capital markets disclosures the company generates. This 8-K is the latest in a sequence of weekly BTC update filings that have become the company's primary investor communication channel. The elevated disclosure cadence reflects a business model that requires continuous equity issuance to fund continuous Bitcoin acquisition, not a one-time event.

The Regulation FD item included in this filing alongside the Other Events item is standard for these BTC update disclosures. Strategy uses the dual-item structure to ensure the weekly holdings update reaches all investors simultaneously.

$MSTR's price context shows the stock down roughly 7% over the trailing week as of May 20, while the 90-day picture shows a gain of approximately 26%. The one-year picture is sharply negative, down roughly 60% from a year ago. That spread between the short recovery and the longer drawdown captures the volatility embedded in a leveraged Bitcoin treasury structure operating through a period of significant Bitcoin price swings.

The crypto Fear and Greed index registered 29 at the time of this filing, a fear reading, while Bitcoin 30-day realized volatility was running at approximately 25% annualized, a relatively calm regime by Bitcoin standards. That combination means the ATM purchases are happening into a market that is cautious but not panicked, and into a Bitcoin tape that is not in a high-volatility stress period.

What the Next Filing Will Confirm

The next BTC update 8-K will show whether the ATM pace held through the following week or stepped down. If the existing facility is approaching depletion, the filing will also signal when the $21.0 billion $MSTR Increase becomes the active vehicle. That transition is the next structural event to track in the capital program.

Research only. Not investment advice.