CLSK vs MSTR: Which Is the Better Buy in 2026?

Same yardstick, side by side (as of October 2026). Valuation lined up like this is most meaningful for two names in the same corner of the market, which these are. Figures are approximate; verify before investing.

The metrics above tell you which is the marginally better business. The bigger risk for most people is not picking the slightly worse stock, it is over-concentrating. CLSK and MSTR share themes, so owning both, or adding either to what you already hold, can quietly push a large share of your portfolio into one bet.

This is the part a generic comparison page cannot answer, because it depends on what you own. Connect your brokerage and Walnut shows your real, combined CLSK and MSTR exposure, flags overlap with your existing positions, and tells you if adding one would tip you past a concentration you are comfortable with, read-only by default, with your login staying at your broker. Walnut is not an investment adviser.

CleanSpark is a Las Vegas-based bitcoin mining company that operates data centers, mostly in the southeastern United States, packed with specialized ASIC machines that compete to validate bitcoin transactions and earn newly minted coins plus fees. It makes money primarily by selling some of the bitcoin it mines and by keeping the rest on its balance sheet as a treasury; reported metrics that matter most are operational hash rate (about 50 EH/s as of early 2026), cost to mine each coin (roughly $44,800 in the quarter ended March 2026), and the size of the bitcoin stack it holds (around 13,600 BTC as of June 2026). Because revenue is paid in bitcoin and a chunk of the balance sheet is bitcoin, both the income statement and reported book value swing with the crypto price.

Full CLSK guide

Strategy Inc, which traded as MicroStrategy until an August 2025 rebrand, began as an enterprise business-intelligence and analytics software vendor and still sells that software (now branded around its AI-powered Strategy One platform). Since 2020 the company has pivoted almost entirely toward accumulating bitcoin as its primary treasury reserve asset, funding purchases through convertible notes, several classes of preferred stock (STRK, STRF, STRD, STRC) and at-the-market common equity sales. As of early July 2026 it held roughly 843,000 to 847,000 BTC at an average cost near $66,000 per coin, about 4% of all bitcoin, making it the largest corporate bitcoin holder in the world. It kept raising capital after that, including more than $2 billion of common stock sold in August 2026.

Full MSTR guide

Both fit overlapping themes, but they are not interchangeable. The useful comparison is which set of drivers and risks you want exposure to.

• CLSK drivers: Scaled, low-cost hash rate; Cheap-power energy footprint.
• MSTR drivers: Leveraged bitcoin exposure; Capital-markets machine.

A faster-growing, richer-valued name usually swings harder, so it suits a longer horizon and a higher tolerance for volatility; a steadier, more cash-generative business suits a more conservative or income-minded investor. The honest test is which set of risks you could hold through a drawdown: CLSK carries direct bitcoin price exposure: when bitcoin falls, mining revenue and the treasury both decline, and the stock has historically moved more than bitcoin itself. For MSTR, the overwhelming risk is bitcoin price: a large drawdown in BTC would hit both the asset value and the leveraged equity far harder, and the company has reported net losses of ~$12.8 billion in Q1 2026 and ~$8.6 billion in Q2 2026, mostly non-cash bitcoin markdowns.

Growth-minded investors who believe the theme has years to run tend to accept the richer multiple for more upside; value-minded investors lean toward the cheaper forward earnings and steadier profile. Pick CLSK if you believe its drivers more; MSTR if you believe its. Many investors hold both, but since they share themes, that is a concentrated bet, not diversification. Decide deliberately and check overlap. For the full detail, see the CLSK and MSTR guides.

CLSK. CleanSpark's reported results are tightly correlated with the price of bitcoin, and the three quarters through June 2026 all produced large net losses driven mostly by non-cash marks on its bitcoin holdings. With no earnings to price, the market values CLSK on its coins, hash rate and power footprint: at the $8.80 close on October 16, 2026 its bitcoin reportedly covered about 40% of the market cap, while debt of about $1.79 billion adds leverage. The 14-analyst mean target of about $23.89 sits far above the current price, which shows how wide the range of views on miners has become.

MSTR. Traditional earnings multiples do not describe Strategy well because quarterly results are dominated by non-cash bitcoin mark-to-market swings: net losses of ~$12.8 billion in Q1 2026 and ~$8.6 billion in Q2 2026 on about $120 million of quarterly software revenue. Investors instead watch the market value of its bitcoin, the mNAV premium or discount to those coins, and the size of the debt and preferred obligations. A ~$59 billion market cap against roughly $69 billion of bitcoin implies the common equity trades below the coins' value before netting debt and preferreds; Q3 2026 results are due October 29.

Headline figures (approximate, October 2026): CLSK shows revenue (ttm) ~$679 million, quarterly revenue (quarter ended jun 2026) ~$138 million (down ~31% YoY), net loss (quarter ended jun 2026) ~$240 million (EPS -$0.39 vs -$0.33 est.), net income (ttm) ~-$1.03 billion; MSTR shows bitcoin held ~843,000-847,000 BTC (early July 2026 count; ~4% of supply), avg btc cost basis ~$66,000 per coin (~$33.1B total), btc holdings value ~$69B at ~$81,000 per bitcoin (mid-October 2026), software revenue (quarterly) ~$122M (Q2 2026); ~$498M TTM, +7% YoY.

CLSK and MSTR are related but distinct: same themes, different businesses and risks. Neither wins in the abstract; the right pick is whichever thesis you actually believe, sized so you are not over-concentrated in one theme. Walnut can show your combined CLSK and MSTR exposure against your real portfolio. It is not an investment adviser.