NOTICE: As of 2/2/2026, Morningstar has completed the acquisition of the Center for Research in Security Prices (CRSP). Learn more >>

Linkedin-in

Request Subscription Information

CRSP Research Data Products PERMNO & PERMCO

PERMNO® & PERMCO®

Permanent Identifiers. Proven Precision.

PERMNO® & PERMCO® are the foundation of CRSP Data’s infrastructure, providing permanent, unchanging identifiers that track securities across their full lifecycle. Unlike tickers or CUSIPs, these identifiers remain consistent through mergers, name changes, and restructurings. The result is seamless historical alignment, reliable back-testing, and lasting data integrity trusted by institutions and researchers for decades.

Used in over 

0 +

published studies

Learn More

Tickers change. PERMNO doesn’t.

Our identifiers persist across a security’s entire lifecycle – from IPO through restructuring – providing the stable foundation that financial data demands.

Mergers. Acquisitions.

PERMNO follows securities over the course of time and across corporate actions, ensuring seamless datasets that account for structural changes.

Historical analysis requires consistency.

PERMNO provides a unified reference key, allowing researchers to compare decades of market activity without gaps.

Back-tests are only as good as their data.

With stable identifiers and accurate linkages, PERMNO lets analysts run simulations with confidence.

CRSP Data runs on PERMNO.

As the foundation of CRSP’s securities database, PERMNO ensures that every dataset we provide is accurate, replicable, and aligned with academic and institutional standards.

Connect With Us!

Get access to the data powering groundbreaking research and policy.

Request Subscription Information

Connect With Us!

Get access to the data powering groundbreaking research and policy.

Request Subscription Information

Explore Studies Backed by CRSP Research Data

CRSP Data has powered thousands of peer-reviewed publications, financial models, and regulatory studies with nearly a century of data. Our identifiers ensure those insights rest on a stable, consistent foundation.

News & Updates

Vanguard to Update Names of U.S. Equity Index Funds Tracking Morningstar Indexes

VALLEY FORGE, PA (April 29, 2026)—Following Morningstar’s rebranding of the CRSP Market Indexes to Morningstar Indexes, Vanguard today announced upcoming changes to the names of multiple Vanguard U.S. equity index [...]

Morningstar Reaches New Milestone in the CRSP Acquisition, Rebranding CRSP Market Indexes to Morningstar Indexes

The rebrand of the CRSP indexes, with over $3 trillion in AUM benchmarked, solidifies Morningstar’s position as one of the top tier index providers and is an important new milestone [...]

CRSP Market Indexes Notification – Index Name Change Notice

Morningstar Indexes is changing the names of the CRSP Market Indexes. These changes will align the individual index names with the standard Morningstar naming convention. Morningstar will implement the name [...]
Scroll to top