Photo of Ryan Castillo

October 16, 2025
Mayer Brown LLP, 14th Floor, 1221 Avenue of the Americas, New York, NY 10020
Register here.

The Eurobond market presents an opportunity for issuers to access a broader global market, diversify their funding sources, and attract a wide range of investors across more than 120 jurisdictions. Investors can benefit from the

On September 16, 2025, the Alternative Investment Management Association (“AIMA”) filed a rulemaking petition with the US Securities and Exchange Commission (the “SEC”) requesting that the SEC amend Rule 105 of Regulation M (“Rule 105”).

Rule 105 governs short selling before a registered offering of equity securities and concerns short sales effected shortly before the

The U.S. government has been steadily tightening rules relating to who can benefit from clean energy incentives.  The One Big Beautiful Bill Act (OBBBA) is the latest step, and it makes one thing crystal clear:  if your company has ties to certain foreign governments, your access to federal tax credits could be at risk and

Our Convertible Bonds: An Issuer’s Guide is available to download.  The guide has been updated to include a discussion relating to European and US issuers. 

The convertible bond market has been active as companies refinance converts issued during the pandemic.  Driven by a high interest rate environment and ongoing macroeconomic uncertainty, companies issued over $86

In Thomson Reuters’ Practical Law latest Q&A, Mayer Brown Capital Markets and Tax team provides a high-level overview of the main equity and debt markets/exchanges, and the main regulators and legislation that govern them. The Q&A also covers prospectus/main offering document requirements, together with any disclosure obligations and exemptions from the requirements to publish/deliver a

On November 20, 2023, the staff of the U.S. Securities and Exchange Commission (“SEC”) issued two new compliance and disclosure interpretations (“C&DIs”) on filing fees and XBRL exhibits. These C&DI’s are summarized below, with links to the full text provided.

Filing Fees

New Question 239.02 explains that, when a well-known season issuer that has registered

In this MB Microtalk video, Mayer Brown’s Ryan Castillo discusses the SEC’s recent amendments to Regulation M, which remove references to credit ratings from Regulation M, replace them with alternative measures of credit worthiness, and impose related recordkeeping requirements on broker-dealers.

Visit our MB Microtalk page for more topics and talks.

This practice note discusses 10 practice points that can help you, as counsel to a special purpose acquisition company (SPAC) or its placement agent, execute a private investment in public equity (PIPE) transaction alongside a SPAC business combination transaction. A SPAC is a public shell company that uses proceeds from its initial public offering (IPO)

On June 7, 2023, the US Securities and Exchange Commission (the “SEC”) unanimously adopted final rules amending Regulation M (the “Final Rules”) to remove its references to credit ratings, replace them with alternative measures of creditworthiness and impose related record-keeping obligations on broker-dealers. The SEC had previously proposed amendments to Regulation M (the “Proposed Rules”)