Grayscale Ethereum Classic Trust (ETC) 8-K, filed Aug 27, 2026
Grayscale Ethereum Classic Trust (ETC) (ETCG)
About this 8-K
Grayscale Ethereum Classic Trust (ETC) filed this 8-K on August 27, 2026.
Items reported
- Item 8.01: Other events
UNITED STATES
SECURITIES AND EXCHANGE COMMISSION
WASHINGTON, D.C. 20549
FORM 8-K
CURRENT REPORT
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Item 8.01. Other Events.
Prior to September 1, 2026, Grayscale Ethereum Classic Trust (ETC) (the “Trust”) valued the ETC tokens (“ETC”) held by the Trust for operational purposes by reference to the CoinDesk Ethereum Classic Price Index (the “Index”). Effective September 1, 2026, the Index will be the CoinDesk Ethereum Classic Benchmark Extended Rate (the “Index”). Effective September 1, 2026, the NAV and NAV per Share of the Trust will be calculated using the Index Price based on the CoinDesk Ethereum Classic Benchmark Extended Rate.
The Index and the Index Price
The Index is a U.S. dollar-denominated composite reference rate for the price of ETC. The Index is designed to (1) mitigate the effects of fraud, manipulation and other anomalous trading activity from impacting the ETC reference rate, (2) provide a real-time, volume-weighted fair value of ETC and (3) appropriately handle and adjust for non-market related events.
The Index Price is determined by the Index Provider through a process in which trade data is cleansed and compiled in such a manner as to algorithmically reduce the impact of anomalistic or manipulative trading. This is accomplished by adjusting the weight of each data input based on price deviation relative to the observable set, as well as recent and long-term trading volume at each venue relative to the observable set.
Constituent Trading Platform Selection
Digital Asset Trading Platforms are selected for inclusion in the Index based on a methodology developed by the Index Provider in alignment with the International Organization of Securities Commissions (“IOSCO”) Principles for Financial Benchmarks. To qualify as a Constituent Trading Platform, a platform is evaluated across the following core criteria listed below (the “Inclusion Criteria”):
Trading platforms that meet these Inclusion Criteria are also required to be licensed and able to serve customers in one or more of the following jurisdictions:
A Digital Asset Trading Platform is removed from the Constituent Trading Platforms when it no longer satisfies the Inclusion Criteria. The Index Provider may also exclude certain trading platforms that require additional support from contributing trading platforms at its discretion. The Index Provider does not currently include data from over-the-counter markets or derivatives platforms among the Constituent Trading Platforms. Over-the-counter data is not currently included because of the potential for trades to include a significant premium or discount paid for larger liquidity, which creates an uneven comparison relative to more active markets. There is also a higher potential for over-the-counter transactions to not be arms-length, and thus not be representative of a true market price. ETC derivative markets are also not currently included. While the Index Provider has no plans to include data from over-the-counter
markets or derivative platforms at this time, the Index Provider will consider IOSCO principles for financial benchmarks, the management of trading venues of ETC derivatives and the aforementioned Inclusion Criteria when considering whether to include over-the-counter or derivative platform data in the future.
The Index Provider and the Sponsor have entered into the index license agreement, dated as of February 1, 2022 (as amended, the “Index License Agreement”), governing the Sponsor’s use of the Index Price. Pursuant to the terms of the Index License Agreement, the Index Provider may adjust the calculation methodology for the Index Price without notice to, or consent of, the Trust or its shareholders. The Index Provider may decide to change the calculation methodology to maintain the integrity of the Index Price calculation should it identify or become aware of previously unknown variables or issues with the existing methodology that it believes could materially impact its performance and/or reliability. The Index Provider has sole discretion over the determination of the Index Price and may change the methodologies for determining the Index Price from time to time. Shareholders will be notified of any material changes to the calculation methodology or the Index Price and will be notified of all other changes that the Sponsor considers significant. The Sponsor will determine the materiality of any changes to the Index Price on a case-by-case basis, in consultation with external counsel.
The Index Provider may change the trading venues that are used to calculate the Index or otherwise change the way in which the Index is calculated at any time. For example, the Index Provider has scheduled monthly reviews in which it may add or remove Constituent Trading Platforms that satisfy or fail the Inclusion Criteria as well as other requirements detailed in the Index Methodology. The Index Provider does not have any obligation to consider the interests of the Sponsor, the Trust, the shareholders, or anyone else in connection with such changes. While the Index Provider is not required to publicize or explain the changes or to alert the Sponsor to such changes, it has historically notified the Trust of certain changes to the Constituent Trading Platforms, including any additions or removals of the Constituent Trading Platforms, in addition to issuing press releases in connection with the same. Although the Index methodology is designed to operate without any manual intervention, rare events would justify manual intervention. Intervention of this kind would be in response to non-market-related events, such as the halting of deposits or withdrawals of funds on a Digital Asset Trading Platform, the unannounced closure of operations on a Digital Asset Trading Platform, insolvency or the compromise of user funds. In the event that such an intervention is necessary, the Index Provider would issue a public announcement through its website, API and other established communication channels with its clients.
Determination of the Index Price
The Index, as reflected by the CoinDesk Ethereum Classic Benchmark Extended Rate for ETC, is calculated through the application of an algorithm to the price of ETC on the Constituent Trading Platforms calculated every 5 seconds over a 24-hour period. The Index’s algorithm is expected to reflect a five-pronged methodology to calculate the Index Price from the Constituent Trading Platforms for ETC:
The Index Provider re-evaluates the weighting algorithm on a periodic basis, but maintains discretion to change the way in which an Index Price is calculated based on its periodic review or in extreme circumstances. The Index is designed to limit exposure to trading or price distortion of any individual Digital Asset Trading Platform that experiences periods of unusual activity or limited liquidity by discounting, in real-time, anomalous price movements at individual Digital Asset Trading Platforms.
The Sponsor believes the Index Provider’s selection process for Constituent Trading Platforms as well as the methodology of the Index Price’s algorithm provides a more accurate picture of ETC price movements than a simple average of Digital Asset Trading
Platform spot prices, and that the weighting of ETC prices on the Constituent Trading Platforms limits the inclusion of data that is influenced by temporary price dislocations that may result from technical problems, limited liquidity or fraudulent activity elsewhere in the ETC spot market.
By referencing multiple trading venues and weighting them based on trade activity, the Sponsor believes that the impact of any potential fraud, manipulation or anomalous trading activity occurring on any single venue is reduced.
If the Index Price becomes unavailable, or if the Sponsor determines in good faith that such Index Price does not reflect an accurate price for ETC, then the Sponsor will contact the Index Provider to obtain the Index Price directly from the Index Provider. If after such contact such Index Price remains unavailable or the Sponsor continues to believe in good faith that such Index Price does not reflect an accurate price for ETC, then the Sponsor will employ a cascading set of rules to determine the Index Price, as described below in “—Determination of the Index Price When Index Price is Unavailable.”
The Trust values its ETC for operational purposes by reference to the Index Price. The Index Price is the value of a ETC as represented by the Index, calculated at 4:00 p.m., New York time, on each business day.
Illustrative Example
For the purposes of illustration, outlined below are examples of how the attributes that impact weighting and adjustments in the aforementioned methodology may be utilized to generate the Index Price for a digital asset.
For example, the Constituent Trading Platforms used to calculate the Index Price of the digital asset may include trading platforms such as Crypto.com, Kraken, LMAX Digital and Bitstamp by Robinhood.
The Index Price algorithm, as described above, is designed to account for manipulation at the outset by only including data from executed trades on Constituent Trading Platforms that charge trading fees. Then, the below-listed elements may impact the weighting of the Constituent Trading Platforms on the Index Price as follows:
Determination of the Index Price When Index Price is Unavailable
The Sponsor uses the following cascading set of rules to calculate the Index Price. For the avoidance of doubt, the Sponsor will employ the below rules sequentially and in the order as presented below, should one or more specific rule(s) fail:
In the event of a fork, the Index Provider may calculate the Index Price based on a digital asset that the Sponsor does not believe to be the appropriate asset that is held by the Trust. In this event, the Sponsor has full discretion to use a different index provider or calculate the Index Price itself using its best judgment.
The Sponsor may, in its sole discretion, select a different index provider, select a different index price provided by the Index Provider, calculate the Index Price by using the cascading set of rules set forth above, or change the cascading set of rules set forth above at any time. The Sponsor will provide notice of any such changes in the Trust’s periodic or current reports and, if the Sponsor makes such a change other than on an ad hoc or temporary basis, will file a proposed rule change with the SEC.
SIGNATURES
Pursuant to the requirements of the Securities Exchange Act of 1934, the registrant has duly caused this report to be signed on its behalf by the undersigned thereunto duly authorized.
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Grayscale Investments Sponsors, LLC, as Sponsor of Grayscale Ethereum Classic Trust (ETC) |
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Date: |
August 27, 2026 |
By: |
/s/ Kathryn Masci |
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Name: Kathryn Masci |
* The Registrant is a trust and the identified person signing this report is signing in their capacity as an authorized officer of Grayscale Investments Sponsors, LLC, the Sponsor of the Registrant.