Cipher Digital Inc. (Nasdaq: CIFR), the data-center operator formerly named Cipher Mining Inc., issued $850.0 million of 0.00% convertible senior notes due 1 November 2032 on 16 October 2026. The closing Form 8-K is a capital-markets event. It is not a disclosed bitcoin purchase.
The same filing says Cipher already carries $1.3 billion of 0.00% convertible notes due 2031, plus a leftover $6.6 million of 1.75% notes due 2030 after a share exchange. Bitcoin (BTC) sat at $81,449 on our CoinGecko snapshot fetched at 2026-10-17T04:54:29+00:00 (24-hour change −0.65%). That tape is context. The document is about notes, shares, and HPC cash.
What happened
EDGAR accepted the 8-K at 17:26:24 Eastern Time on 16 October 2026 (21:26:24 UTC). Co-President and Chief Legal Officer William Iwaschuk signed it that day. The period of report still shows 13 October 2026, the pricing date for the capped calls and the 2030-note exchange agreements. Items on the cover are 1.01, 2.03, 3.02, 7.01, and 9.01.
On 16 October 2026 Cipher issued $850.0 million aggregate principal of 0.00% Convertible Senior Notes due 2032 under an indenture with U.S. Bank Trust Company, National Association, as trustee. The notes are senior and unsecured, pay no regular interest, and do not accrete. They mature on 1 November 2032 unless repurchased, redeemed, or converted earlier. Holders get an optional cash put on 1 November 2030 unless Cipher has already called all outstanding notes.
The initial conversion rate is 65.3211 shares of common stock per $1,000 principal, or about $15.31 per share. Cipher may settle conversions in cash, stock, or a mix, at its election. The initial purchasers still hold a 13-day option to buy up to another $150.0 million of the same notes. Until that option expires or is exercised, the printed size is $850.0 million, not $1.0 billion.
On 13 October 2026, when the deal was priced, Cipher entered privately negotiated capped call transactions. The cap starts at $28.35, a 150% premium to the last reported sale of $11.34 that session. The contracts cost about $89.7 million and cover, subject to anti-dilution adjustments, the shares that initially underlie the notes. Holders have no rights in those contracts.
The same day Cipher agreed to exchange about $165.9 million principal of the 1.75% notes due 2030 for about 40.7 million common shares, inclusive of accrued interest. That exchange closed on 16 October 2026. About $6.6 million of the 2030 notes remains outstanding on the old terms. The new notes rank equal with that stub and with the $1.3 billion 2031 zero-coupon converts. They sit behind Cipher’s $200.0 million senior secured revolving credit facility to the extent of collateral, and behind subsidiary liabilities.
The notes were sold to initial purchasers under Securities Act Section 4(a)(2) and resold to qualified institutional buyers under Rule 144A. The 40.7 million exchange shares went out under Section 3(a)(9). Item 7.01 furnishes notices that default settlement on both the remaining 2030 notes and the 0.00% notes due 2031 is now physical stock, unless Cipher specifies otherwise on a given conversion.
Context
Two days before the close, Cipher’s 14 October 2026 pricing press release (Exhibit 99.1 to a separate 8-K) estimated net proceeds at about $835.1 million after initial purchasers’ discounts and commissions, or about $982.5 million if the $150 million option is taken in full, and before issuer expenses. About $89.7 million funds the capped calls. The remainder is intended for additional equity in the Barber Lake project, the near-term high-performance computing pipeline, more development sites, and general corporate purposes. Extra capped calls would soak up part of any greenshoe cash. The word bitcoin does not appear in that use-of-proceeds paragraph.
The conversion price is a stated 35.0% premium to the $11.34 last sale on 13 October 2026. Issuer calls are blocked until 5 November 2029, and then only if the stock has traded above 130% of conversion price for the specified window and liquidity conditions hold. Cleanup redemption is allowed if less than 10% of original principal remains. Cross-default and judgment thresholds in the indenture sit at $80 million. Those are note terms, not a mining-hashrate print.
Cipher still presents itself as an industrial-scale data-center developer built for HPC tenants. IREN’s FY26 8-K already showed AI cloud revenue crossing bitcoin mining in one quarter. Cipher’s 2032 notes are a financing stack for that kind of story: zero coupon, conversion premium, capped calls, and shares to shrink an older convert. It is not a spot-bitcoin add.
Bitcoin itself is still inside a known range, not a break. Coinbase BTC-USD stats fetched at 2026-10-17T05:12:09Z showed last $81,505.13, session high $82,831.01, low $80,693.69, and open $82,052.16 (Coinbase Exchange 24-hour stats). That is the same $80,694–$82,831 box the desk has been watching on this tape, not a decisive range break. Ether (ETH) was $2,424.02 (−0.49% on the same snapshot). Solana (SOL) was $104.62. None of those prints change the 8-K math.
Share supply does change. Roughly 40.7 million new shares went to 2030-note holders. The 2032 notes can deliver more stock later at $15.31 unless Cipher elects cash. Capped calls blunt that dilution only up to $28.35. The pricing release also warned that exchanging holders and option counterparties may buy or sell CIFR and run derivatives around the trade. That is mechanical flow, not a bitcoin bid.
Compare that with a true coin-custody filing. Riot’s BitGo 8-K moved a vendor, not a stack. Cipher’s pages move indentures and share counts. If you still think every miner 8-K is a treasury print, read the items: 2.03 is a direct financial obligation. 3.02 is an unregistered equity sale. There is no Item 8.01 bitcoin-holdings table here.
Our read
I read this close as HPC and campus equity finance sitting on top of an already large convert stack, not as a delayed bitcoin buy. Cipher is adding $850 million of zero-coupon paper due 2032, keeping $1.3 billion of 2031 zeros, shrinking the 2030 coupon notes mostly into stock, and paying $89.7 million for a call spread that only covers conversion up to $28.35. The company told investors in the pricing release where the cash is supposed to go: Barber Lake equity, HPC build-out, more sites, and corporate uses. That is the stance.
The physical-settlement notices on the older series fit the same read. Cipher is telling remaining 2030 and 2031 holders that, unless it says otherwise, conversions come in shares. That conserves cash for campuses. It also leaves equity overhang on the tape. Traders who want a bitcoin-treasury headline have to ignore both the use-of-proceeds paragraph and Item 3.02.
The range is still the bitcoin story this weekend, not Cipher. See the Bitcoin history page and our market snapshot guide for the longer cycle and a clean timestamp. CIFR’s notes do not move that range. They tell you how one former miner is paying for HPC dirt.
Falsifiable claim: By 2026-11-16 23:59 UTC, Cipher’s next Form 8-K or Form 10-Q will still describe the 16 October 2026 0.00% notes due 2032 as issued in an $850.0 million principal amount (or up to $1.0 billion only if a later 8-K shows the $150.0 million option was exercised), and will not state that those net proceeds were used primarily to purchase bitcoin or another spot crypto-asset treasury. If Cipher amends the closing 8-K to say the $850.0 million notes were not issued, or a subsequent filing says the dominant use of those net proceeds was a bitcoin (or ether) purchase, this read is wrong.
What to watch next
First, the 13-day greenshoe. A follow-on 8-K would show whether initial purchasers took any of the extra $150.0 million and whether Cipher bought more capped calls. Until that file appears, do not write the deal as a round billion.
Second, the next 10-Q cash-flow and debt footnotes. Barber Lake equity, HPC construction spend, and remaining revolver capacity should move if the stated use is real. A sudden, large digital-asset line would contradict the pricing paragraph.
Third, CIFR stock versus $15.31 and $28.35. Conversion value and the capped-call ceiling are the mechanical levels. Hedge rebalancing around those prints can hit the share, not BTC. Watch the optional put on 1 November 2030 as a refinancing date, not a bitcoin date.
Fourth, bitcoin’s own box. Coinbase’s 16–17 October session still lived between $80,693.69 and $82,831.01. A last trade through either side of that session range, held on the next Coinbase daily stats pull, would be a tape event. Cipher’s indenture would still be a note event. For more miner and treasury 8-Ks, stay in Bitcoin News.