Ryan Cox v. CoinMarketCap OpCo LLC, et al.

District Court, D. Arizona·Decided February 17, 2026·No. 3:21-cv-08197·Unknown

Opinion

WO

Ryan Cox, No. CV-21-08197-PCT-SMB

Plaintiff, ORDER

v.

CoinMarketCap OpCo LLC, et al.,

Defendants. The Court now considers Defendant BAM Trading Services Inc. d/b/a Binance.US’s (“BAM”) Motion to Dismiss (Doc. 106) and Defendant CoinMarketCap OpCo., LLC’s (“CMC”) Motion to Dismiss (Doc. 107). The Motions have been fully briefed. For the following reasons, the Court grants BAM’s and CMC’s Motions. The Court gives Plaintiff leave to amend their Amended Complaint. Plaintiff Ryan Cox, an Arizona resident, filed the present putative class action alleging violations of the Commodity Exchange Act (“CEA”), the Arizona Consumer Fraud Act (“ACFA”), and the Sherman Act. (Doc. 105.) Plaintiff alleges that BAM and CMC used “various unlawful means to artificially suppress the value of HEX”—a cryptocurrency. (Id. at 1–2 ¶ 3.) The Amended Complaint alleges as follows. CMC operates “the world’s most-referenced price-tracking website for cryptoassets.” (Id. at 4 ¶ 14.) CMC is owned by Digital Anchor Holdings Ltd. a cryptocurrency exchange formerly known as Binance Capital Management Co., Ltd. (Id. at 2 ¶ 5.) BAM, Digital Anchor’s United States affiliate, is a cryptocurrency exchange affiliated with CMC. (Id.) Generally, websites like CMC “generate revenue by linking consumers with affiliated exchanges”—like BAM—“where [consumers] can buy and sell cryptocurrencies.” (Id. at 3 ¶ 7.) Thus, consumers go to websites like CMC “to find links to exchanges where they can trade their [cryptocurrencies].” (Id.) CMC provides an assessment of various cryptocurrencies’ market capitalization, which “is calculated by multiplying the price of a cryptocurrency with its circulating supply at any given time.” (Id. at 18 ¶ 73; 21 ¶ 82.) CMC then “ranks cryptocurrencies on the basis of their overall market cap in comparison to those of other cryptocurrencies.” (Id. at 21 ¶ 82.) As of September 20, 2020, CMC ranked HEX as having the 20th highest market cap. (Id. at 21 ¶ 85.) However, on September 27, the “Suppression Period” began, during which, HEX’s ranking dropped to 201st despite being “the best performing cryptocurrency of 2020.” (Id. ¶¶ 83, 86.) CMC refused to adjust HEX’s ranking and thus “locked” it. (Id. ¶¶ 83, 87.) This “caused HEX to trade at lower prices than it would have had the ranking not been locked” because “[t]he higher a cryptocurrency is ranked, the higher up it appears on the homepage of [CMC’s] website for interested users to purchase.” (Id. ¶¶ 89–90.) The Amended Complaint goes on to allege that CMC’s refusal to adjust HEX’s ranking persisted into 2021. (Id. at ¶ 100.) HEX’s market cap should have had it ranked anywhere from 3rd to 6th on CMC; however, HEX’s ranking remained at 201st. (Id. ¶¶ 100-103.) HEX was ranked between 4th and 10th on other price-tracking websites. (Id. at 23 ¶ 106.) This resulted in “institutional and retail investors” not purchasing HEX. (Id. ¶¶ 107, 112.) CMC is alleged to have locked HEX’s ranking to “artificially inflate[] the value of some or all of the cryptocurrencies ranked above HEX,” which included cryptocurrencies issued by Digital Anchor such as Binance Coin. (Id. at 24 ¶ 114.) Plaintiff alleges that HEX posed a threat to CMC and BAM because it “is designed to generate interest when ‘staked’, [sic] which discourages active trading.”1 (Id. at 25

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Ryan Cox v. CoinMarketCap OpCo LLC, et al., (D. Ariz. 2026).

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