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Chapter 2: Introduction to Depository

A Depository is an institutional organization that holds financial securities (such as equity shares, debentures, bonds, government securities, commercial papers, and mutual fund units) in electronic book-entry form on behalf of investors. Functionally, a depository operates analogously to a commercial banking institution:

Operational DimensionCommercial Banking SystemElectronic Depository System
Core Asset HandledHolds financial currency / cash fundsHolds securities (equities, debt, bonds, units)
Storage FormElectronic book-entry balances (no physical currency notes held)Electronic book-entry balances (no physical paper certificates)
Primary AccountBank Savings / Current AccountDemat (Beneficiary Owner) Account
Channel IntermediaryBank Branch / Digital Banking PortalDepository Participant (DP)
Transfer MechanismAccount-to-account debit/credit via RTGS / NEFT / UPIAccount-to-account debit/credit via electronic instruction / clearing transfer
Asset CharacteristicFungible (individual rupee notes have no distinctive identity)Fungible (individual security units carry no distinct certificate numbers)

The operational mandate of a depository is to eliminate the risks, delays, administrative expenses, and inefficiencies inherent in the physical storage and paper-based transfer of securities certificates.


The modern Indian depository system is governed by the Depositories Act, 1996, enacted by Parliament to provide legal validity to the electronic dematerialisation, ownership, and transfer of securities. The key statutory principles embodied in the Act include:

1. Dual Ownership Structure (Section 10)

The Depositories Act establishes a clear statutory distinction between legal title and economic ownership:

  • Registered Owner (Depository): The depository is entered as the "Registered Owner" in the statutory register of members maintained by the issuing company. However, the depository holds no beneficial or voting interest in the securities; it serves purely as a fiduciary custodian without voting rights or rights to receive dividends for itself.
  • Beneficial Owner (Investor): The individual or institutional investor who owns the securities electronically in their demat account is legally designated as the Beneficial Owner (BO). The beneficial owner enjoys all economic, legal, and operational rights associated with the securities—including voting rights, dividend receipts, bonus entitlements, rights offerings, and the right to transfer or pledge the shares.
Workflow & Structure Diagram
+-----------------------------------------------------------------------------------+
|                        DUAL OWNERSHIP LEGAL STRUCTURE                             |
+-----------------------------------------------------------------------------------+
|                                                                                   |
|            +-------------------------------------------------------+              |
|            |                 ISSUING COMPANY                       |              |
|            |            (Maintains Register of Members)            |              |
|            +---------------------------+---------------------------+              |
|                                        |                                          |
|                                        v Legal Registered Title                   |
|            +-------------------------------------------------------+              |
|            |                 CENTRAL DEPOSITORY                    |              |
|            |                 (REGISTERED OWNER)                    |              |
|            |     Holds zero economic, voting, or dividend rights   |              |
|            |     Acts strictly as a fiduciary electronic custodian |              |
|            +---------------------------+---------------------------+              |
|                                        |                                          |
|                                        v Electronic Demat Record                  |
|            +-------------------------------------------------------+              |
|            |             BENEFICIAL OWNER (INVESTOR)               |              |
|            |                 (ECONOMIC OWNER)                      |              |
|            |     Enjoys 100% of dividends, bonus, voting, rights,  |              |
|            |     pledge capabilities, and liquidation proceeds     |              |
|            +-------------------------------------------------------+              |
+-----------------------------------------------------------------------------------+

2. Statutory Fungibility of Securities (Section 9)

All securities held in a depository are legally fungible. This means that individual electronic shares cease to carry distinct distinctive numbers, folio numbers, or certificate numbers. All shares of a particular ISIN (International Securities Identification Number) are identical and completely interchangeable. An investor holding 100 shares of Reliance Industries Limited owns a proportionate beneficial interest in 100 interchangeable units of that company's capital.

3. Free Transferability of Securities (Section 7)

The Act mandates that securities held in a depository shall be freely transferable by the beneficial owner via electronic book entries, without requiring stamp duty on physical transfer deeds or approval by company boards.

4. Statutory Indemnification of Investors (Section 16)

Under Section 16 of the Depositories Act, the depository is legally bound to indemnify any beneficial owner for any loss caused due to the negligence, omission, or operational default of the depository or its depository participants. If the depository compensates the investor, it has the statutory right to recover that loss from the defaulting depository participant.

5. Multi-Depository Competitive Model

The Act explicitly provides for a multi-depository architecture to foster market competition, enhance operational resilience, prevent monopolistic pricing, and provide redundancy against catastrophic systemic failures.


The Depositories Act contains comprehensive provisions structuring the entire lifecycle of electronic custody:

  • Section 3 (Certificate of Commencement of Business): No depository can begin operations without securing a certificate of commencement of business from SEBI, granted only after rigorous verification of operational infrastructure and risk safeguards.
  • Section 4 (Agreement between Depository and Participant): A depository must enter into a formal, binding agreement with every participant specifying operational procedures, communication interfaces, and mutual rights.
  • Section 5 (Services of Depository): Any person through a participant can avail services of a depository by entering into an agreement with the participant.
  • Section 6 (Surrender of Certificate of Security): Any person who has entered into an agreement to surrender certificate of security to the issuer in the manner specified by regulations. The issuer shall cancel the physical certificate of security and substitute in its records the name of the depository as registered owner.
  • Section 7 (Registration of Transfer of Securities): Every depository shall, on receipt of intimation from a participant, register the transfer of security in the name of the transferee.
  • Section 8 (Options to Receive Physical or Demat Securities): Every person subscribing to securities offered by an issuer has the option to hold them either in physical certificate form or with a depository in demat form.
  • Section 9 (Fungibility of Securities): All securities held in a depository shall be in fungible form, ceasing to have individual certificate numbers or distinctive numbers.
  • Section 10 (Rights of Depositories and Beneficial Owners): Explicitly declares that the depository is the registered owner, but has no voting rights or other rights in respect of securities, which reside solely with the beneficial owner.
  • Section 11 (Register of Beneficial Owners): Every depository must maintain a continuous, unalterable electronic register and index of beneficial owners.
  • Section 12 (Pledge or Hypothecation of Securities): Subject to regulations, any beneficial owner may create a pledge or hypothecation in respect of a security owned through a depository.
  • Section 13 (Furnishing of Information): Every depository must furnish information relating to securities of an issuer held by it to that issuer at specified intervals.
  • Section 14 (Option to Opt Out / Rematerialisation): If a beneficial owner seeks to opt out of a depository in respect of any security, they may inform the depository, which will notify the issuer to issue physical certificates within 30 days.
  • Section 16 (Indemnity for Loss): Without prejudice to any other law, any loss caused to the beneficial owner due to negligence of the depository or participant shall be indemnified by the depository.
  • Section 18 & 19 (Enforcement and Inspection Powers of SEBI): Empowers SEBI to call for information, conduct investigations, inspect books of accounts, and issue binding directives to depositories and participants in the public interest.

Every security admitted into the depository system is assigned a globally unique 12-character alphanumeric code termed the International Securities Identification Number (ISIN), standardized under ISO 6166.

In India, SEBI has designated National Securities Depository Limited (NSDL) as the sole National Numbering Agency (NNA) responsible for allocating ISINs for all equity, debt, and derivative securities.

Workflow & Structure Diagram
+-----------------------------------------------------------------------------------+
|                        ISIN ANATOMY UNDER ISO 6166                                |
+-----------------------------------------------------------------------------------+
|                                                                                   |
|    I   N   -   E   0   0   2   A   -   0   1   -   0   1   8                      |
|  +-------+   +-------------------+   +-------+   +-----------+                    |
|  |Country|   |     Issuer ID     |   |Security|   | Check     |                   |
|  | Code  |   |                   |   | Type   |   | Digit     |                   |
|  +-------+   +-------------------+   +-------+   +-----------+                    |
|  (2 Char)         (5 Char)            (4 Char)     (1 Char)                       |
|                                                                                   |
|  - Characters 1-2: Country Code ("IN" denotes India)                             |
|  - Character 3: Entity Type ("E" = Company/Corporate, "A" = Central Govt,        |
|                "B" = State Govt, "D" = Mutual Fund, "F" = Financial Inst)         |
|  - Characters 4-7: Unique alphanumeric identifier assigned to the Issuer         |
|  - Characters 8-9: Security Type ("01" = Ordinary Equity Shares, "02" = Pref)   |
|  - Characters 10-11: Serial number of the specific issue                         |
|  - Character 12: Check Digit calculated using the Modulus 10 'Double-Add-Double' |
|                  algorithm to detect keying or transmission errors               |
+-----------------------------------------------------------------------------------+

Two national depositories operate in India, both regulated by SEBI under the Depositories Act, 1996, and the SEBI (Depositories and Participants) Regulations, 2018:

COMPARISON OF INDIAN DEPOSITORIES

ParameterNational Securities Depository Limited (NSDL)Central Depository Services (India) Limited (CDSL)
Year of CommencementNovember 1996March 1999
Promoters / AnchorsIDBI, UTI, NSE, and leading commercial banksBSE Limited, State Bank of India, HDFC Bank, Standard Chartered Bank, Union Bank
Core Software PlatformDPM (Depository Participant Module) distributed systemCDAS (Central Depository Accounting System) centralized
Demat Account Number16-character alphanumeric16-digit purely numeric
StructureFormat: "IN" + 6-digit DP ID + 8-digit Client IDFormat: 8-digit DP ID + 8-digit Client ID
Internet Service PortalSPEED-e / IDeASeasiest / easi
Listing StatusUnlisted (Proposed IPO)Listed on NSE

Under the SEBI (Depositories and Participants) Regulations, 2018, establishing and operating a depository is subject to strict eligibility conditions:

  • Sponsor Eligibility: A depository can only be sponsored by entities registered as:
    1. A recognized stock exchange;
    2. A scheduled commercial bank;
    3. A public financial institution;
    4. An insurance company registered with IRDAI;
    5. A foreign financial institution approved by the central government.
  • Minimum Net Worth Requirement: A depository must maintain a minimum net worth of ₹100 Crore at all times to absorb operational losses, fund continuous technological modernization, and maintain enterprise risk reserves.
  • Shareholding Limits:
    • A recognized stock exchange or clearing corporation may hold up to 15% of the paid-up equity share capital.
    • Other entities (including banks and public financial institutions) can hold up to 5% individually.
    • At least 51% of the equity share capital must be held by the public and unrelated institutional investors.
  • Fit and Proper Person Criteria: All promoters, directors, key management personnel, and institutional shareholders must satisfy SEBI's "fit and proper person" standards concerning financial integrity, absence of criminal convictions, and professional reputation.
  • Board Composition: At least 50% of the governing board must comprise independent Public Interest Directors (PIDs), and the appointment of the Managing Director & CEO requires prior SEBI approval.

A depository functions as a self-regulatory organization (SRO) over its registered participants and issuers. Under the Depositories Act, a depository is empowered to frame Bye-Laws and Business Rules, subject to prior approval from SEBI:

Key Bye-Laws Cover:

  1. Admission of Intermediaries: Criteria and documentation for onboarding Depository Participants (DPs) and Issuers/RTAs.
  2. Security Admission: Conditions under which equity, debt, commercial papers, and other financial instruments are admitted for dematerialisation and assigned ISINs.
  3. Internal Control and Security Protocols: Disaster Recovery Sites (DRS), real-time data replication, end-to-end encryption, and multi-factor authorization.
  4. Disciplinary Powers: Powers to conduct concurrent audits, inspect participant books, impose financial penalties, suspend operations, or cancel registrations of non-compliant participants.

Core Obligations:

  • Continuous Electronic Reconciliation: The depository must conduct daily electronic reconciliation with issuing companies and their RTAs to ensure that the aggregate number of electronic shares recorded across all beneficial owner accounts exactly equals the total dematerialised capital admitted by the issuer.
  • Record Preservation: Under SEBI regulations, a depository must preserve all accounting records, audit logs, transfer instructions, and beneficial ownership positions for a minimum statutory period of eight years.
  • Investor Grievance Redressal: Depositories must maintain dedicated investor grievance cells, participate in SEBI's SCORES 2.0 platform, and facilitate resolution through the SMART ODR portal.