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  • | SID: Definition, Functions, and How to Get One

SID: Definition, Functions, and How to Get One

Written by Corporate Secretary & Communications
Apr 6, 2026 • 5 min

SID: Definition, Functions, and How to Get One

Before investing in stocks, every investor needs a specific identity in Indonesia’s capital market. This identity is a key requirement so investors can trade legally and be officially recorded.

During the registration process, you’ll come across the term SID. Every investor, whether a beginner or experienced, must have one. So, what is an SID in investing? Let’s take a closer look.

The Definition of SID

SID, or Single Investor Identification, is a unique identification number assigned to each investor in Indonesia’s capital market. With an SID, your investment activities are officially recorded.

The Indonesian Central Securities Depository (KSEI) issues SIDs and uses them across various instruments, such as stocks, mutual funds, and bonds. With a single ID, you can access a wide range of investment products more conveniently.

What Is an SID?

An SID is the official identification number used to conduct transactions through a securities company. Without an SID, you cannot open a securities account or buy and sell stocks. That’s why understanding SID helps you prepare for the investment process from the start.

Functions and Benefits of an SID

After understanding what it is, here are the key functions and benefits of an SID:

1. Single Investment Identity

An SID serves as a single identity for all investment activities. With one number, an investor can be officially registered in the capital market and access multiple instruments without needing a new ID.

2. Easier Asset Tracking

Through an SID, investors can track all their investment assets across platforms. Once you understand SID, it becomes easier to monitor holdings in stocks, mutual funds, and other instruments within one integrated system.

3. Security and Transparency

An SID enhances data security and ownership transparency. Every transaction is clearly recorded, reducing the risk of data misuse while ensuring all assets are registered under your name.

4. Lifetime Validity

One SID is valid for life. Even if an investor has multiple securities accounts or investment products, the same SID is used, making portfolio management more practical and efficient.

How to Get an SID

To obtain an SID, follow these steps:

1. Created When Opening an Account

An SID is usually generated automatically when you open a securities account with a brokerage. In this process, the SID is directly linked to your investor data from the beginning.

2. Prepare Required Documents

You’ll need to prepare your e-KTP, NPWP (if available), and personal data. Complete and accurate information speeds up verification, ensuring the SID issuance process runs smoothly.

3. Register Through Official Platforms

For convenience and credibility, create your SID through official securities platforms, such as growin.id from Mandiri Sekuritas or via the official website mandirisekuritas.co.id/. There, you can find registration details and clearly understand the account opening process.

SID: The Essential First Step in Investing

An SID is a mandatory identity for every investor in the capital market. With it, investors can carry out various investment activities legally and have them properly recorded in the system.


Without an SID, you cannot open a securities account or trade. That’s why understanding its function will help you move forward with confidence. Start your investment journey in the capital market by creating your SID at growin.id. The Growin’ app is also available on the App Store and Play Store!


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