# 2025-15615: New Exchange Joins Stock Trade Surveillance Club Instantly

2025-15615, Joint Industry Plan; Notice of Filing and Immediate Effectiveness of Amendment to the National Market System Plan Governing the Consolidated Audit Trail To Add 24 National Exchange LLC as a Participant, is a Federal Register notice from Securities and Exchange Commission published 2025-08-18, effective 2025-08-06 (as of 2026-06-08).

- Canonical: https://policyrisk.com/federal-register/2025-15615
- As of: 2026-06-08
- Plain-text twin of the page above; the HTML and this file carry the same facts.

## Facts
- Document number: 2025-15615
- Title: Joint Industry Plan; Notice of Filing and Immediate Effectiveness of Amendment to the National Market System Plan Governing the Consolidated Audit Trail To Add 24 National Exchange LLC as a Participant
- Type: Notice
- Agencies: Securities and Exchange Commission
- Citation: 90 FR 40092
- Published: 2025-08-18
- Effective: 2025-08-06
- Comments close: not stated
- Significant: no
- Touches household money: no
- Regulation identifier numbers: none
- Last updated: 2026-06-08

## In one line

New Exchange Joins Stock Trade Surveillance Club Instantly

## Summary

The 24 National Exchange LLC (24X) just joined the big club of stock market participants who help track trades through the Consolidated Audit Trail (CAT). This means 24X will now share trade data to keep markets fair and transparent. The change took effect right away on August 6, 2025, and 24X will pay fees like the other members to support the system.

## Effects PRIA read

No economic effects identified for this document.

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## Sources
- [2025-15615 on federalregister.gov](https://www.federalregister.gov/documents/2025/08/18/2025-15615/joint-industry-plan-notice-of-filing-and-immediate-effectiveness-of-amendment-to-the-national-market)
- [2025-15615 as published (PDF)](https://www.govinfo.gov/content/pkg/FR-2025-08-18/pdf/2025-15615.pdf)

## Related
- [Previous: 2025-15613, Notice of Petition for Waiver of Compliance](https://policyrisk.com/federal-register/2025-15613)
- [Next: 2025-15616, Agency Information Collection Activities: Proposed Collection; Comment Request](https://policyrisk.com/federal-register/2025-15616)
- [All Federal Register documents](https://policyrisk.com/federal-register)

Source: PRIA, https://policyrisk.com/federal-register/2025-15615 (as of 2026-06-08).