Blog — November 24, 2025

Reducing Operational Risk Through Faster Publicly Traded Partnership Detection

Financial losses, regulatory penalties, and reputational risks have become increasingly common when critical tax-related data - particularly around publicly traded partnerships (PTP) - is missing or incomplete. Following the implementation of U.S. IRS Section 1446(f), many brokers chose to apply 10% withholding on gross proceeds from PTP sales involving non-U.S. clients, as confirmed in their official international account policies. This shift has caused some platforms to restrict PTP trades for non-U.S. investors due to compliance uncertainty.

Asset managers have also faced IRS penalties after failing to identify PTP holdings in time to meet Section 1446(a) requirements. Prime brokers and wealth managers continue to encounter onboarding delays and missed revenue opportunities due to the manual effort required to screen portfolios for PTP exposure.

In parallel, investment platforms have reported incorrect or incomplete 1042-S tax filings caused by gaps in classification - leading to delayed investor tax reclaims and increased operational overhead.

Addressing the PTP blind spot

The challenge is that PTP tax obligations are triggered without timely or standardized issuer guidance, leaving firms to identify and monitor these securities with little support. This approach results in persistent blind spots that open them up to significant risk.

Managed Corporate Actions (MCA) launched the Publicly Traded Partnership (PTP) Service to give firms earlier, deeper visibility into PTP securities and timelier reporting of related tax events.

This service is a purpose-built service that helps tax operations teams identify PTPs early and track downstream tax events with confidence. This is especially important when it comes to the transfer of a PTP interest by a foreign investor. Under IRC Section 1446(f), this typically triggers a 10% withholding on the total amount realized, compelling firms to identify impacted securities in advance - often without adequate issuer guidance.

The service addresses this gap by leveraging issuer-qualified notices to maintain a curated list of PTP securities. The service systematically analyzes 1446(f)-qualified notices and K-1 filings to populate and maintain a reliable list of PTP securities. These are then delivered in machine-readable formats to support real-time decision-making.

Timely, comprehensive, usable intelligence

The PTP Securities List Service is designed to eliminate guesswork, close the data gaps, and deliver timely insight via usable, structured data that can be securely and seamlessly ingested.

  • Data-driven PTP identification: The service team curates a foundational PTP universe using qualified notices and related documentation.
  • Tax event notifications: Alerts on tax-related corporate actions - such as 1446(f) withholding and 1042-S reporting - are included where applicable.
  • Timely and structured reporting: Reports are updated frequently and delivered in CSV format with issuer names, security identifiers (CUSIP, ISIN, SEDOL), and issue descriptions included.
  • Secure delivery. All data is shared via an FTP channel in a client-specific PTP folder, making internal ingestion seamless.
  • Ongoing surveillance: The list is continuously refreshed as issuers release new notices or securities are reclassified or delisted.
  • Integration with corporate actions: MCA actively monitors and backs PTP information through best-in-class corporate action data - empowering firms to act in accordance with IRS rules.

Maximizing returns, minimizing risk

PTPs offer compelling returns, but their complex tax treatment-particularly for non-U.S. investors-can expose financial institutions to substantial compliance risks. As regulations tighten and enforcement intensifies, firms need smarter tools, not more manual effort, to stay ahead.

That’s where the Managed Corporate Actions (MCA) suite comes in - seamlessly integrating 1446(f) qualified notice data within corporate action workflows. By doing so, the MCA PTP Service empowers firms to act sooner, comply confidently, and mitigate tax-related risks with precision - all as part of a broader, end-to-end approach to corporate actions data management.

Read more about Managed Corporate Actions


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