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William Mack

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William B. Mack is a co-chair of the Financial Regulatory and Compliance Practice. He is experienced in advising companies on regulatory and compliance matters relating to the Securities and Exchange Commission regulations, the Exchange Act, Anti-Money Laundering laws and Financial Industry Regulatory Authority (FINRA) rules.

William’s practice involves all aspects of broker-dealer regulation, including Self-Regulatory Organization (SRO) membership, supervision, employment, research, soft dollar arrangements, chaperoning of foreign broker-dealers, social media, use of foreign finders, anti-money laundering rules, alternative trading systems (ATS), exchanges, and market making issues. He also provides regulatory guidance to investment banking clients in connection with securities offerings and related trading issues.

 

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On Dec. 14, 2022, the SEC announced charges against eight social media influencers in a $100 million securities fraud scheme in which they allegedly used social media platforms to tout…

Continue Reading 8 Influencers Charged in $100 Million Securities Fraud Scheme

On Nov. 7, 2022, the U.S. District Court for the District of New Hampshire granted the Securities and Exchange Commission’s motion for summary judgment in SEC v. LBRY, Inc.…

Continue Reading SEC v. LBRY, Inc.: The SEC’s Latest Crypto Victory


On Dec. 12, 2020, the U.S. Securities and Exchange Commission brought what crypto followers consider one of the most consequential enforcement actions related to the sale of cryptocurrency since the…

Continue Reading Crypto Showdown: SEC’s Lawsuit Against Ripple Labs Reaches Critical Juncture

To Kim Kardashian’s fans and followers, her endorsement of a product signals the product is on trend. However, when a simple post endorsing cryptocurrency goes out to the world, it…

Continue Reading SEC Charges Kim Kardashian with Violating Anti-Touting Law, Signals to Celebrities that Payments for Endorsements Must Be Disclosed

On Oct. 3, the Financial Stability Oversight Council (FSOC) took another step in identifying, assessing, and responding to the risks various types of digital assets pose to the financial system…

Continue Reading Digital Assets: Financial Stability Oversight Council Risk Report Assesses Regulatory Gaps; Offers Recommendations

Federal regulatory agencies are closely monitoring crypto-asset developments and banking organizations’ participation in the crypto-asset industry. This GT Alert covers the guidance issued by the FDIC, CFPB, and the Federal…
Continue Reading Regulatory Scrutiny on the Rise of Bank and Crypto Company Dealings

On June 2, 2022, the New York Senate passed Senate Bill S6486D (the Bill), which would amend the state’s environmental conservation law and set forth a two-year moratorium on certain…
Continue Reading New York’s Proposed Moratorium on Cryptocurrency Mining Operations

On June 8, 2022, the New York State Department of Financial Services (DFS) issued a new Regulatory Guidance, setting foundational criterial for USD-backed stablecoins used by DFS-regulated entities. This…
Continue Reading NYDFS Becomes First US Financial Regulator to Issue Stablecoin Expectations to Virtual Currency Industry