First Trust Combined Series 640 has confirmed that its recent amendment to the registration statement complies with SEC regulations. This certification is essential for maintaining investor confidence and adhering to industry standards.

The company, First Trust Combined Series 640, is categorized under the investment management sector. It is associated with First Trust Portfolios L.P., which serves as its depositor. The recent filing was made on October 22, 2026, under the accession number 0001445546-26-007818.

According to the filing, the letter certifies that the most recent amendment to the registration statement on Form S-6 does not differ from what would have been filed under Rule 497(b) of the Securities Act. This amendment was filed electronically on October 20, 2026.

This update may affect investors and stakeholders within the investment management sector, as compliance with SEC regulations is crucial for operational integrity. The filing reassures them of the trust's commitment to regulatory standards.

The filing does not say what happens next.

The filing indicates that the effective date of the amendment is also October 22, 2026, which aligns with the date of the filing. This timely submission is critical for ensuring that all regulatory requirements are met without delay.

Additionally, the filing notes that the registration statement is associated with File No. 333-298733 and Central Index Key (CIK) No. 1998008, which are important identifiers for tracking the company's filings with the SEC.

First Trust Portfolios L.P., as the depositor, plays a significant role in managing the trust's compliance and operational functions. The letter was signed by Ronda L. Saeli-Chiappe, who holds the position of Senior Vice President, indicating a high level of oversight in the certification process.

While the filing provides essential details about compliance and operational integrity, it does not elaborate on any upcoming strategic initiatives or changes in investment strategy that may arise following this amendment.