Exhibit 2.6

CERTAIN CONFIDENTIAL PORTIONS OF THIS EXHIBIT WERE OMITTED BY MEANS OF MARKING SUCH PORTIONS WITH BRACKETS (“[***]”) BECAUSE THE IDENTIFIED CONFIDENTIAL PORTIONS (I) ARE NOT MATERIAL AND (II) ETHZILLA CORPORATION CUSTOMARILY AND ACTUALLY TREATS THAT INFORMATION AS PRIVATE OR CONFIDENTIAL.

ENGINE SALE AND PURCHASE AGREEMENT

Dated as of March 27, 2026

BETWEEN

AERO ENGINE SOLUTIONS, INC.

as Seller

and

EURUS AEROSPACE TOKEN I LLC

as Buyer

with respect to the sale and purchase of one (1) CFM International model CFM56-5B5/P aircraft
engine bearing manufacturer’s serial number [***]

ENGINE SALE AND PURCHASE AGREEMENT

THIS ENGINE SALE AND PURCHASE AGREEMENT (this “Agreement”) is dated as of this 27 day of March, 2026 and entered into by and between:

Seller and Buyer may collectively be referred to as the “Parties” or each one individually referred to as a “Party” as the context so requires.

In consideration of and subject to the mutual covenants, terms and conditions contained in this Agreement, Seller hereby agrees to sell to Buyer and Buyer hereby agrees to purchase from Seller the Engine (as defined below), and Seller and Buyer further agree as follows:

“Affiliate” means a Person or an entity that directly or indirectly controls, is controlled by, or is under common control with, another Person or entity, including, among the others, executive officers, directors, large stockholders, subsidiaries, parent entities and sister companies.

“Bill of Sale” means a warranty bill of sale substantially in the form of Exhibit A hereto.

“Business Day” means a day other than a Saturday or Sunday on which the banks in West Palm Beach, Florida, are open for the transaction of business of the type required by this Agreement.

“Buyer Indemnitees” means each of Buyer and its successors and assigns, shareholders, subsidiaries, directors, partners, members, beneficial interest holders, representatives, servants, contractors, trustees, officers, agents, employees and Affiliates of each of the foregoing entities.

“Cape Town Treaty” means, collectively, the official English language text of the Convention on International Interests in Mobile Equipment and the Protocol to the Convention on International Interests in Mobile Equipment on Matters specific to Aircraft Equipment each adopted on November 16, 2001 at a diplomatic conference in Cape Town, South Africa.

“Casualty Event” means the actual or constructive total loss or destruction of the Engine or the loss of possession of the Engine for more than sixty (60) days by reason of seizure, requisition, theft, disappearance, or otherwise.

“Claims” has the meaning given to such term in Section 10(a).

“Closing” means the transfer of title to the Engine as evidenced by Seller’s execution and delivery of the Bill of Sale to Buyer.

“Closing Date” means the date on which Closing actually occurs.

“Cutoff Date” has the meaning given to such term in Section 11(a).

“Delivery Location” means the Lessee’s facility located in Tulsa, Oklahoma or such other location mutually agreed upon by Buyer and Seller in writing, acting reasonably.

“Delivery Receipt” means a delivery receipt in the form of Exhibit B hereto.

“Dollars” and the sign “$” means the lawful currency of the United States of America.

“Engine” means one (1) CFM International model CFM56-5B5/P aircraft engine bearing manufacturer’s serial number [***] in as-installed QEC configuration described in Schedule 1 hereto, together with all Parts and Engine Records but excluding engine stand, nose cowl and thrust reverser.

“Engine Activity” means, in relation to the Engine, the ownership, possession, use, import, export, registration, re-registration, deregistration, non-registration, manufacture, performance, transportation, management, location, movement, acquisition, disposal, transfer, exchange, control, design, condition, defect, testing, inspection, acceptance, delivery, redelivery, leasing, subleasing, pooling, interchange, maintenance, repair, loss, damage, emissions, refurbishment, insurance, reinsurance, service, modification, overhaul, replacement, alteration, storage, removal or operation of the Engine or any Part (whether in the air or on the ground or otherwise).

“Engine Records” means all records, logs, technical data, manuals and other documents (including any electronically stored documents) relating to the Engine, to the extent such documents are in Seller’s possession or control.

“Engine Stand” means one (1) engine stand bearing manufacturer’s serial number [***].

“FAA” means the Federal Aviation Administration.

“FAA Counsel” means the law firm of [***].

“Final Closing Date” means March 31, 2026 or such later date as may be agreed between the Parties in writing.

“Financing Lien” means the Lien granted by Seller to [***] over the Engine in connection with Seller’s financing of the Engine with [***].

“Government Entity” means any (a) nation, state, county, city, town, village, district, or other jurisdiction of any nature; (b) federal, state, local, municipal, foreign, or other government; (c) governmental or quasi-governmental authority of any nature (including any governmental agency, branch, department, official, or entity and any court or other tribunal); (d) multinational organization or body; or (e) body exercising, or entitled to exercise, any administrative, executive, judicial, legislative, regulatory, or taxing authority or power of any nature.

“GTA” means the Master Engine Lease General Terms Agreement to be entered into between Lessee, as lessee and Buyer, as lessor.

“International Registry” means the International Registry of Mobile Assets established under the Cape Town Convention.

“KYC” means know your customer.

“Lease” means Lease Agreement [***] to be entered into between Lessee, as lessee and Buyer, as lessor, pertaining to the lease of the Engine, which will incorporate all of the terms and conditions of the GTA.

“Lessee” means [***].

“Lien” means any and all liens, security interests, mortgages, encumbrances, rights of first offer, rights of first refusal, attachments, leases and claims of third parties.

“Notice” has the meaning given to such term in Section 14.

“OFAC” means the U.S. Treasury Department’s Office of Foreign Assets Control.

“Option Price” means $3,000,000.00.

“Part” means any appliance, part, accessory or other item of equipment pertaining to, installed on, or attached to the Engine.

“Permitted Lien” means any Lien created by or through Buyer.

“Person” means any individual, corporation, partnership, limited liability company, joint venture, association, joint stock company, company, firm, trust, organization, government, or any agency or political subdivision thereof or any other entity, whether or not having a separate legal personality.

“Purchase Price” means $6,350,000.00.

“Release of Lien” means a release of lien (a) releasing the Engine from the Financing Lien; (b) terminating the Financing Lien on the FAA registry; and (c) authorizing FAA Counsel to discharge the Financing Lien from the International Registry.

“Required Condition” means that at the expiration or earlier termination of the Lease, the Engine: (a) is absent any severe damage due to foreign object damage, domestic object damage, overtemp, blade liberation or a similarly significant event and has not been involved in an incident or accident during the term of the Lease but, in otherwise “AS-IS”, “WHERE-IS” as-removed condition; (b) has complete back-to-birth traceability for all life limited parts installed on the Engine during the term of the Lease; and (c) is free and clear of any and all Liens other than Liens arising by or through Seller.

“Seller Indemnitees” means each of Seller, [***] and the respective successors and assigns, shareholders, subsidiaries, directors, partners, members, beneficial interest holders, representatives, servants, contractors, trustees, officers, agents, employees and Affiliates of each of the foregoing entities.

“Servicer Fee” means an amount equal to the sum of [***] of the Rent (defined in the Lease) and [***] of the Use Fees (defined in the Lease) actually received by Buyer, as lessor, from Lessee, as lessee under the Lease.

“Servicing Agreement” means servicing agreement to be entered into between Buyer, as owner and Seller, as servicer, with respect to:

“Scheduled Closing Date” means March 25, 2026 or such later date as may be agreed between the Parties.

“Taxes” and “Tax” have the meanings given to such terms in Section 3(b).

“Tax Indemnitee” means Seller and its Affiliates.

“Trade Control Laws” means all laws and regulations relating to: (a) economic, trade and financial sanctions administered or enforced by OFAC or the U.S. Department of State; (b) export and re-export controls administered or enforced by the U.S. Department of Commerce or U.S. Department of State; (c) U.S. anti-corruption laws, including but not limited to, the U.S. Foreign Corrupt Practices Act of 1977, as amended; and (d) any other U.S. law of similar effect or that relates to U.S. trade controls or anti-corruption, in each case, as may amended from time to time.

“Transaction Documents” means this Agreement, the Bill of Sale, the Delivery Receipt, the Servicing Agreement and any other ancillary documents executed by a Party in connection therewith.

If a Casualty Event occurs with respect to the Engine after the date of this Agreement and prior to the Closing Date, neither Party will have any further liability to the other with respect to the purchase and sale of the Engine hereunder.

If any of the foregoing conditions precedent have not been satisfied or waived by Buyer in writing on or before the Final Closing Date, Buyer may terminate this Agreement by written notice to Seller and thereafter neither Party will have any further obligation or liability hereunder to one another hereunder with respect to the sale and purchase of the Engine save for the express terms of this Agreement that are intended to survive such termination.

If any of the foregoing conditions precedent have not been satisfied or waived by Seller in writing on or before the Final Closing Date, Seller may terminate this Agreement by written notice to Buyer and thereafter, neither Party will have any further obligation or liability hereunder to one another hereunder with respect to the sale and purchase of the Engine save for the express terms of this Agreement that are intended to survive such termination.

All Notices shall be delivered by personal delivery, nationally recognized overnight courier (with all fees pre-paid), or email (with confirmation of transmission), or certified or registered mail (in each case, return receipt requested, postage pre-paid). Except as otherwise provided in this Agreement, a Notice is effective only (a) upon receipt by the receiving Party, and (b) if the Party giving the Notice has complied with the requirements of this Section 14.

[signature page follows]

IN WITNESS WHEREOF, each of Seller and Buyer executed this Agreement as of the date shown at the beginning of this Agreement.