Significant Accounting Policies (Policies)

9 Months Ended

Sep. 30, 2025

Accounting Policies [Abstract]

Basis of Accounting, Policy [Policy Text Block]

A. Basis of Accounting

The following significant accounting policies are consistently followed by the Trust in the preparation of its financial statements in conformity with U.S. GAAP. The preparation of financial statements in conformity with U.S. GAAP requires management to make certain estimates and assumptions that affect the reported amounts of assets and liabilities and disclosures of contingent assets and liabilities at the date of the financial statements and the reported amounts of revenue and expenses during the reporting period. Actual results could differ from those estimates.

Investment, Policy [Policy Text Block]

B. Ether

Coinbase Custody Trust Company, LLC (the “Ether Custodian”) is responsible for safekeeping the ether owned by the Trust. Anchorage Digital Bank N.A. is the “Additional Ether Custodian” for the Trust. At the current time, the Sponsor has no plans to move any of the Trust’s ether to the Additional Ether Custodian. The Ether Custodian and the Additional Ether Custodian are appointed by the Trustee.

The net asset value of the Trust equals the total assets of the Trust, which consists solely of ether and cash, less total liabilities of the Trust, each determined by the Trustee pursuant to policies established from time to time by the Trustee or its affiliates or otherwise described herein. The Trust’s periodic financial statements are prepared in accordance with the Financial Accounting Standards Board Accounting Standards Codification Topic 820, “Fair Value Measurement” (“ASC Topic 820”) and utilize an exchange-traded price from the Trust’s principal market for ether as of 11:59 p.m. Eastern Time (“ET”) on the Trust’s financial statement measurement date. The Sponsor determines in its sole discretion the valuation sources and policies used to prepare the Trust’s financial statements in accordance with U.S. GAAP. The Trust engages a third-party vendor to obtain a price from a principal market for ether, which is determined and designated by such third-party vendor daily based on its consideration of several exchange characteristics, including oversight, and the volume and frequency of trades.

The Sponsor has the exclusive authority to determine the Trust’s net asset value, which it has delegated to the Trustee under the Trust Agreement. The Trustee has delegated to the Trust Administrator the responsibility to calculate the net asset value of the Trust and the net asset value per Share (“NAV”), based on a pricing source selected by the Trustee. In determining the Trust’s net asset value, the Trust Administrator values the ether held by the Trust based on an index (the “Index”), unless the Sponsor in its sole discretion determines that the Index is unreliable. The methodology used to calculate the Index price to value ether in determining the net asset value of the Trust  may not be deemed consistent with U.S. GAAP. The CME CF Ether–Dollar Reference Rate – New York Variant for the ether – U.S. Dollar trading pair (the “CF Benchmarks Index”) shall constitute the Index, unless the CF Benchmarks Index is not available or the Sponsor in its sole discretion determines the CF Benchmarks Index is unreliable as the Index and therefore determines not to use the CF Benchmarks Index as the Index. If the CF Benchmarks Index is not available or the Sponsor determines, in its sole discretion, that the CF Benchmarks Index is unreliable (together a “Fair Value Event”), the Trust’s holdings  may be fair valued on a temporary basis in accordance with the fair value policies approved by the Trustee.

Additionally, the Trust Administrator monitors for unusual prices and escalates to the Trustee if detected. If the CF Benchmarks Index is not used, the Trust will notify Shareholders in a prospectus supplement, in its periodic Exchange Act reports and/or on the Trust’s website. The Trust Administrator calculates the net asset value of the Trust and the NAV once on each day other than a Saturday or a Sunday, or a day on which NASDAQ is closed for regular trading (a “Business Day”). The NAV for a normal trading day will be released after 4:00 p.m. ET. Trading during the core trading session on NASDAQ typically closes at 4:00 p.m. ET. However, NAVs are not officially released until after the completion of a comprehensive review of the NAV and prices utilized to determine the NAV of the Trust by the Trust Administrator. Upon the completion of the end of day reviews by the Trust Administrator the NAV is released to the public typically by 5:30 p.m. ET and generally no later than 8:00 p.m. ET. The period between 4:00 p.m. ET and the NAV release after 5:30 p.m. ET (or later) provides an opportunity for the Trust Administrator and the Trustee to detect, flag, investigate, and correct unusual pricing should it occur and implement a Fair Value Event, if necessary. Any such correction could adversely affect the value of the Shares.

The Trust’s periodic financial statements may not utilize net asset value of the Trust to the extent the methodology used to calculate the Index is deemed not to be consistent with U.S. GAAP.

Gain or loss on sales of ether is calculated on a trade date basis using the average cost method.

The following tables summarize activity in ether for the three months ended September 30, 2025 and 2024:

Three Months Ended September 30, 2025	Quantity			Cost			Fair Value			Realized Gain (Loss)
Beginning balance		1,768,573		$	5,242,898,137		$	4,396,336,194		$	—
Ether purchased		2,516,582			9,716,662,530			9,716,662,530			—
Ether sold for the redemption of shares		(441,125	)		(1,471,657,646	)		(1,798,740,023	)		327,082,377
Ether sold to pay expenses		(1,207	)		(3,951,091	)		(4,681,463	)		730,372
Net realized gain		—			—			327,812,749			—
Net change in unrealized appreciation/depreciation		—			—			3,236,696,155			—
Ending balance		3,842,823		$	13,483,951,930		$	15,874,086,142		$	327,812,749

Three Months Ended September 30, 2024	Quantity			Cost			Fair Value			Realized Gain (Loss)
Beginning balance		3,031		$	10,000,000		$	10,590,295		$	—
Ether purchased		384,840			1,147,427,156			1,147,427,156			—
Ether sold to pay expenses		(28	)		(84,988	)		(63,328	)		(21,660	)
Net realized loss		—			—			(21,660	)		—
Net change in unrealized appreciation/depreciation		—			—			(138,509,122	)		—
Ending balance		387,843		$	1,157,342,168		$	1,019,423,341		$	(21,660	)

The following tables summarize activity in ether for the nine months ended September 30, 2025 and the period from May 21, 2024 (Date of Seeding) to September 30, 2024:

Nine Months Ended September 30, 2025	Quantity			Cost			Fair Value			Realized Gain (Loss)
Beginning balance		1,071,415		$	3,543,902,275		$	3,571,669,777		$	—
Ether purchased		3,471,085			12,249,273,102			12,249,273,102			—
Ether sold for the redemption of shares		(697,568	)		(2,302,367,865	)		(2,332,927,732	)		30,559,867
Ether sold to pay expenses		(2,109	)		(6,855,582	)		(6,849,547	)		(6,035	)
Net realized gain		—			—			30,553,832			—
Net change in unrealized appreciation/depreciation		—			—			2,362,366,710			—
Ending balance		3,842,823		$	13,483,951,930		$	15,874,086,142		$	30,553,832

Period from May 21, 2024 (Date of Seeding) to September 30, 2024	Quantity			Cost			Fair Value			Realized Gain (Loss)
Beginning balance		—		$	—		$	—		$	—
Ether purchased		387,871			1,157,427,156			1,157,427,156			—
Ether sold to pay expenses		(28	)		(84,988	)		(63,328	)		(21,660	)
Net realized loss		—			—			(21,660	)		—
Net change in unrealized appreciation/depreciation		—			—			(137,918,827	)		—
Ending balance		387,843		$	1,157,342,168		$	1,019,423,341		$	(21,660	)

Calculation of Net Asset Value [Policy Text Block]

C. Calculation of Net Asset Value

On each Business Day, as soon as practicable after 4:00 p.m. ET, the net asset value of the Trust is obtained by subtracting all accrued fees, expenses and other liabilities of the Trust from the total assets held by the Trust. The Trust Administrator computes the NAV by dividing the net asset value of the Trust by the number of Shares outstanding on the date the computation is made.

Cash and Cash Equivalents, Policy [Policy Text Block]

D. Cash and Cash Equivalents

Cash includes non-interest bearing, non-restricted cash maintained with one banking institution that does not exceed U.S. federally insured limits.

Offering of the Shares [Policy Text Block]

E. Offering of the Shares

Shares are issued and redeemed continuously in aggregations of 40,000 Shares (a “Basket”) or integral multiples thereof, based on the quantity of ether attributable to each Share (net of accrued but unpaid Sponsor’s fee and any accrued but unpaid expenses or liabilities). Individual investors cannot purchase or redeem Shares in direct transactions with the Trust. Only registered broker-dealers that are eligible to settle securities transactions through the book-entry facilities of the Depository Trust Company and that have entered into a contractual arrangement with the Sponsor governing, among other matters, the creation and redemption of Shares (such broker-dealers, the “Authorized Participants”), can place orders to receive Baskets in exchange for cash or ether. Baskets may be redeemed by the Trust in exchange for an amount of ether corresponding to their redemption value or for  the cash proceeds from selling the amount of ether corresponding to their redemption value.

In connection with cash creations and redemptions, the Trust engages in ether transactions for converting cash into ether (in association with purchase orders) and ether into cash (in association with redemption orders) by choosing, in its sole discretion, to trade directly with third parties (each, an “Ether Trading Counterparty”), who are not registered broker-dealers pursuant to written agreements between such Ether Trading Counterparties and the Trust, or choosing to trade through the Prime Execution Agent acting in an agency capacity with third parties through its Coinbase Prime service pursuant to the Prime Execution Agent Agreement.

Income Tax, Policy [Policy Text Block]

F. Federal Income Taxes

The Trust is treated as a grantor trust for federal income tax purposes and, therefore, no provision for federal income taxes is required. Any interest, expenses, gains and losses are passed through to the holders of Shares of the Trust. The Sponsor has analyzed applicable tax laws and regulations and their application to the Trust as of September 30, 2025 and does not believe that there are any uncertain tax positions that require recognition of a tax liability.

Segment Reporting, Policy [Policy Text Block]

G. Segment Reporting

The Chief Financial Officer of the Sponsor acts as the Trust’s Chief Operating Decision Maker (“CODM”) and is responsible for assessing performance and allocating resources with respect to the Trust. The CODM has concluded that the Trust operates as a single operating segment since the Trust has a single investment strategy as disclosed in its prospectus, against which the CODM assesses performance. The financial information provided to and reviewed by the CODM is presented within the Trust’s financial statements.