Glossary term
Statement of Additional Information (SAI)
A statement of additional information is a fund disclosure document that provides details beyond the fund prospectus.
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What Is a Statement of Additional Information?
A statement of additional information, or SAI, is a disclosure document that provides more detail about a fund than the prospectus. Mutual funds, ETFs, registered closed-end funds, and some variable contracts may have SAIs.
The SAI is not usually the first document an investor reads, but it can contain important detail about fund operations, risks, fees, financial statements, management, tax matters, and brokerage practices.
Key Takeaways
- An SAI gives additional fund information beyond the prospectus.
- It may include details about managers, service providers, financial statements, taxes, and brokerage practices.
- A fund generally does not have to deliver the SAI unless an investor requests it.
- The SAI can be useful when comparing fund structure, costs, and governance.
- It is different from a summary prospectus or shareholder report.
How an SAI Works
A fund's prospectus is designed to present key information in a more investor-facing format. The SAI sits behind that document with more detailed disclosure. It may expand on investment restrictions, portfolio turnover, advisory arrangements, board oversight, tax considerations, and financial statements.
Investors can request the SAI without charge. It is also commonly available through fund websites and SEC filings.
SAI vs. Prospectus
Document | Main role | Typical use |
|---|---|---|
Summary prospectus | Condensed key fund information | Quick review of objective, fees, risks, and performance. |
Statutory prospectus | Core offering disclosure | Detailed fund review before investing. |
SAI | Additional detailed disclosure | Deeper due diligence on operations, policies, and governance. |
Shareholder report | Periodic fund update | Reviewing results and holdings over a reporting period. |
What Investors May Find There
The SAI can help investors evaluate details that are not obvious from the headline expense ratio or performance table. It may show more about portfolio restrictions, securities lending, brokerage allocation, control persons, board structure, and tax treatment.
It can also matter when an investor is comparing share classes, fund complexes, or specialized strategies where the operational details affect cost and risk.
How to Access It
An investor can usually request the SAI from the fund or find it through the fund's website or SEC filing records. The document may be long and technical, so it is often best used to answer specific questions rather than read casually from start to finish.
For example, an investor might consult the SAI to understand a fund's investment restrictions, tax language, brokerage practices, or board oversight structure.
When It Is Worth Reading
The SAI is most useful for deeper fund due diligence. A casual investor may not need to read every page, but a fiduciary, analyst, advisor, or unusually detail-oriented investor may use it to answer questions the prospectus does not fully address.
The practical question is whether the extra detail changes how the fund's cost, risk, tax profile, or governance should be understood.
The Bottom Line
A statement of additional information is the deeper disclosure companion to a fund prospectus. It is not as reader-friendly as a summary document, but it can answer important questions about how a fund is managed and operated.