CleanSpark, Inc. priced a $2.276 billion note deal on 18 September 2026. It did not close that deal.
The issuer is CSDC Finance I, LLC, a wholly owned indirect subsidiary. The paper is 7.875% senior secured notes due 2031, sold at 98.500% of principal. The company says it expects to close on 25 September 2026, subject to customary conditions. Until a closing 8-K lands, this is a priced book, not cash in the treasury.
That distinction matters on a tape where Bitcoin is already bouncing. The desk CoinGecko snapshot fetched at 2026-09-19T00:07:15+00:00 printed Bitcoin at $80,844, up 5.90% over 24 hours, with Ethereum at $2,608.78 (+6.76%) and a global crypto market cap near $2.777 trillion. A miner-developer printing a coupon is not the same event as a range break, and it is not a bitcoin buy.
What happened
EDGAR posted CleanSpark’s Form 8-K for the event date 18 September 2026, accession 0001193125-26-395727, under Item 8.01 Other Events. The current report says CSDC Finance I priced $2.276 billion aggregate principal amount of 7.875% senior secured notes due 2031 at 98.500% of principal. The notes are aimed at people reasonably believed to be qualified institutional buyers under Rule 144A and at non-U.S. persons under Regulation S. They are not a registered retail offering.
Exhibit 99.1, the 18 September 2026 pricing press release incorporated by that 8-K, adds the use of proceeds and the security package. Net proceeds are intended (a) to finance the remaining cost of the Sandersville Facility data-center build-out, (b) to reimburse CleanSpark for certain prior equity contributions on that facility, and (c) to fund debt service reserves. CSRE Properties Sandersville, LLC is slated to fully and unconditionally guarantee the notes. The notes and guarantee are described as first-priority liens on substantially all assets of the issuer and that guarantor, other than excluded property, plus all equity interests of the issuer held by CSDC Holdings I, LLC. CleanSpark itself is offering a completion guarantee: it will fund the issuer as needed so Sandersville still finishes if note proceeds are not enough.
The same exhibit repeats the close date: 25 September 2026, subject to customary closing conditions. It also says there can be no assurance as to whether, when, or on what terms the offering may be completed. That sentence is the whole story in one line.
This is an update to the desk’s earlier read, not a new company. On 17 September 2026 CleanSpark launched a proposed $2.227 billion note package. We treated that launch as a pitch. The 18 September 8-K is the pricing print: size up to $2.276 billion, coupon 7.875%, issue price 98.500% of par, close still in the future. We are not retracting the cash warning. We are tightening it.
Context
Bitcoin miners have spent two years selling the market a second identity: data-center landlord. CleanSpark’s own exhibit leans that way. It calls the company a data-center developer and points the money at Sandersville, not at a spot bitcoin bid. If you care about Bitcoin’s market history, you still have to read this as project finance sitting next to a proof-of-work operator, not as a treasury addition.
The coupon is not cheap. 7.875% on a 2031 senior secured note, sold at 98.5 cents on the dollar, is the price a private book pays for construction risk, completion-guarantee risk, and a single-asset story. Gross proceeds before fees would be about $2.242 billion if the full $2.276 billion principal is issued at that 98.500% price. The 8-K does not state net proceeds after discounts, commissions, or reserves, and we will not invent that number.
The security package also tells you who is on the hook. The notes are issued by a finance subsidiary, backed by a Sandersville property-company guarantee, and completed (if needed) by the parent. That is a stacked counterparty-risk chain, not a simple CleanSpark unsecured IOU. If Sandersville slips, the completion guarantee is the clause that tries to keep the project from stalling. It is also the clause that can pull cash out of the parent after close.
The bitcoin tape around the filing was firm, not frozen. The same 2026-09-19T00:07:15+00:00 CoinGecko snapshot showed Solana at $112.57 (+10.94% over 24 hours) and bitcoin dominance near 58.35%. On Coinbase Exchange, BTC-USD 24-hour stats retrieved 2026-09-19T00:12:00+00:00 showed a last trade at $80,900.69, a session high of $81,388.47, a low of $76,444.32, and 24-hour volume of about 12,255 BTC (Coinbase Exchange 24h stats). The level-2 book at that retrieval had a mid near $80,917, with roughly $11.5 million of bids and $15.6 million of asks inside 1% of mid (Coinbase Exchange level-2 book). That is usable book depth for a liquid coin. It is not a substitute for a closed bond deal.
A priced high-yield note also does not refill spot ETF demand. U.S. bitcoin ETF flow tables were not reachable this hour (Farside returned HTTP 403 to the desk crawler), so we are not going to guess the latest print. Price bounce plus a miner coupon is still just two separate facts until someone files that the notes funded.
Our read
I am updating yesterday’s view, not reversing it. The 17 September launch was a pitch. The 18 September 8-K is a priced pitch. Cash still is not in.
Stance: Treat $2.276 billion as a coupon and a close date, not as dry powder. The use of proceeds is Sandersville construction, reimbursement of prior equity contributions, and debt-service reserves. None of those lines is “buy bitcoin.” The 7.875% coupon at 98.500% of par is the market telling you this is leveraged project paper, not a gift from a covered issuer.
The earlier CleanSpark note reaction said the $2.227 billion headline was not cash. That claim still holds. What changed is specificity: we now have a coupon, a price, a slightly larger principal, a completion guarantee, and a stated expected close of 25 September 2026. Specificity is not settlement.
Falsifiable claim: If, by 23:59 UTC on 26 September 2026, CleanSpark files an 8-K stating that the CSDC Finance I 7.875% senior secured notes due 2031 closed at about $2.276 billion aggregate principal and that the issuer received the net proceeds, then the “priced-not-funded” half of this read is wrong for that date. If by that same deadline EDGAR shows a withdrawn deal, a material downsize, a delayed close with no proceeds, or an 8-K that the offering did not complete, the cash warning stands and the expected-25-September close is the part that missed.
What to watch next
First, the closing 8-K. Look for Item 2.03 or another 8.01 that states the notes were issued, the amount actually sold, and whether the 7.875% / 98.500% terms survived. A silent 25 September is a delay, not a close.
Second, the proceeds waterfall versus bitcoin. If a later filing says net proceeds bought BTC, that would be a different story than Sandersville. Until then, keep this in the Bitcoin news bucket as miner balance-sheet news, not as a spot bid.
Third, the completion guarantee in action. Watch whether CleanSpark discloses extra parent funding into CSDC Finance I after close. That would mean the notes were not enough, which is exactly the risk the guarantee describes.
Fourth, the bitcoin range itself. $80,844 on the 2026-09-19T00:07:15+00:00 snapshot is a bounce, not a decisive break by itself. Pair the next CLSK filing with a clean snapshot the same way you would read any market snapshot: timestamp, range, then the document. Coupon prints are loud. Settlement is quieter, and it is the only number that changes the cash line.
Liquidity in BTC-USD can stay thick while CLSK’s private notes are still in escrow. Do not confuse those two books. The first is a public liquidity tape. The second is a Rule 144A project deal that has named a close date and has not yet said it got there.