Grayscale Ethereum Classic adds Crypto.com to index

Grayscale Ethereum Classic Trust (ETC) reports that CoinDesk Indices has updated the trading platforms used to calculate its Ether Classic price index.

Rhea-AI Filing Summary

Grayscale Ethereum Classic Trust (ETC) reports that CoinDesk Indices has updated the trading platforms used to calculate its Ether Classic price index. Effective September 21, 2025, Crypto.com was added to the CoinDesk Ether Classic Price Index after meeting minimum liquidity requirements, and no existing platforms were removed in this quarterly review. The index now draws prices from Coinbase, Kraken, Bitfinex, and Crypto.com, which together help determine the reference price used for the Trust. CoinDesk Indices may change these venues or its calculation methodology over time, with further adjustments considered during scheduled quarterly reviews.

8-K Event Classification

Item 8.01 — Other Events

1 item

Item 8.01 Other Events Other

Voluntary disclosure of events the company deems important to shareholders but not covered by other items.

FAQ

AI-generated questions and answers. How Rhea-AI works. Not financial advice.

What change did Grayscale Ethereum Classic Trust (ETCG) disclose about its pricing index?

The Trust disclosed that CoinDesk Indices added Crypto.com as a trading platform used in the CoinDesk Ether Classic Price Index. This index helps determine the reference price for the Trust’s shares, and no existing constituent platforms were removed in this update.

When does the addition of Crypto.com to the Ether Classic price index for ETCG take effect?

The change takes effect on September 21, 2025, when Crypto.com is included as a trading venue in the CoinDesk Ether Classic Price Index. This timing reflects the Index Provider’s scheduled quarterly review of eligible trading platforms and their liquidity.

Which trading platforms now make up the CoinDesk Ether Classic Price Index used by ETCG?

After the update, the index uses prices from Coinbase, Kraken, Bitfinex, and Crypto.com. These platforms, called Constituent Trading Platforms, provide market data that CoinDesk Indices aggregates to calculate the Ether Classic reference price for the Trust.

How often can the Index Provider change trading platforms used for the ETCG pricing index?

CoinDesk Indices may change trading venues or its calculation method at any time, with scheduled quarterly reviews to add or remove platforms. Decisions are based on criteria described in the Trust’s Form 10-K section on the Ether Classic market and index methodology.

Does this index change for ETCG involve removing any existing trading platforms?

No existing platforms were removed. The Index Provider added Crypto.com to the CoinDesk Ether Classic Price Index during its quarterly review and kept Coinbase, Kraken, and Bitfinex as constituent platforms, maintaining and slightly expanding the group contributing price data.

AI-generated analysis. How Rhea-AI works. Not financial advice.

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Accepted by SEC EDGAR 09/24/2025 - 04:24 PM EDT Learn about SEC filing dates

0001705181false00017051812025-09-212025-09-21

UNITED STATES
SECURITIES AND EXCHANGE COMMISSION
WASHINGTON, D.C. 20549

FORM 8-K

CURRENT REPORT

Pursuant to Section 13 or 15(d) of the Securities Exchange Act of 1934

Date of Report (Date of earliest event reported): September 21, 2025

Grayscale Ethereum Classic Trust (ETC)

(Exact name of Registrant as Specified in Its Charter)

Delaware			000-56309	82-6239281
(State or Other Jurisdiction of Incorporation)			(Commission File Number)	(IRS Employer Identification No.)
c/o Grayscale Investments Sponsors, LLC 290 Harbor Drive, 4th Floor
Stamford, Connecticut				06902
(Address of Principal Executive Offices)				(Zip Code)

Registrant’s Telephone Number, Including Area Code: 212 668-1427

N/A

(Former Name or Former Address, if Changed Since Last Report)

Check the appropriate box below if the Form 8-K filing is intended to simultaneously satisfy the filing obligation of the registrant under any of the following provisions:

	☐	Written communications pursuant to Rule 425 under the Securities Act (17 CFR 230.425)
	☐	Soliciting material pursuant to Rule 14a-12 under the Exchange Act (17 CFR 240.14a-12)
	☐	Pre-commencement communications pursuant to Rule 14d-2(b) under the Exchange Act (17 CFR 240.14d-2(b))
	☐	Pre-commencement communications pursuant to Rule 13e-4(c) under the Exchange Act (17 CFR 240.13e-4(c))

Securities registered pursuant to Section 12(g) of the Act:

Title of each class		Trading Symbol(s)		Name of each exchange on which registered
Grayscale Ethereum Classic Trust (ETC) Shares		ETCG		N/A

Indicate by check mark whether the registrant is an emerging growth company as defined in Rule 405 of the Securities Act of 1933 (§ 230.405 of this chapter) or Rule 12b-2 of the Securities Exchange Act of 1934 (§ 240.12b-2 of this chapter).

Emerging growth company ☒

If an emerging growth company, indicate by check mark if the registrant has elected not to use the extended transition period for complying with any new or revised financial accounting standards provided pursuant to Section 13(a) of the Exchange Act. ☐

Item 8.01. Other Events.

CoinDesk Indices, Inc. (the “Index Provider”) announced a change to the Digital Asset Trading Platforms used to derive the Index Price (collectively, “Constituent Trading Platforms”) for Grayscale Ethereum Classic Trust (ETC) (the “Trust”). Effective September 21, 2025, the Index Provider added Crypto.com to the CoinDesk Ether Classic Price Index (ECX) (the “Index”) due to the trading platform meeting the Index Provider’s minimum liquidity requirement, and did not remove any Constituent Trading Platforms as part of its scheduled quarterly review. As of the date of this current report, the Constituent Trading Platforms included in the Index are Coinbase, Kraken, Bitfinex, and Crypto.com.

The Index Provider may change the trading venues that are used to calculate the Index Price, or otherwise change the way in which an Index Price is calculated, at any time. The Index Provider has scheduled quarterly reviews, in which it may add or remove Constituent Trading Platforms that satisfy or fail the criteria described in “Item 1. Business—Overview of the ETC Industry and Market—ETC Value—The Index and the Index Price” in the Trust’s Annual Report on Form 10-K for the year ended December 31, 2024, as filed with the Securities and Exchange Commission on March 7, 2025.

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.

			Grayscale Investments Sponsors, LLC, as Sponsor of Grayscale Ethereum Classic Trust (ETC)
Date:	September 24, 2025	By:	/s/ Edward McGee
			Name: Edward McGee Title: Chief Financial Officer*

* 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.