Old Share Certificates of a Company That Merged or Changed Its Name: What They're Worth Now

Families find share certificates in names that no longer appear on any stock exchange, and assume they're worthless. Often they aren't. The company changed its name, or merged into another, and the holding now sits in a different company altogether.

If the company changed its name

A name change doesn't change the shares. The company is the same legal entity with the same identity number, and a certificate in the old name still represents your shares.

The Tata Iron and Steel Company became Tata Steel in 2005, and Hindustan Lever became Hindustan Unilever in 2007. Certificates in the old names are still claims on those companies. Old Tata Steel shares.

If the company merged into another

In a merger, the company that is absorbed ceases to exist. Its shareholders receive shares of the company it merged into, in a fixed swap ratio set by the scheme of arrangement. The old certificates are cancelled.

When HDFC Ltd merged into HDFC Bank with effect from 1 July 2023, for example, shareholders received 42 HDFC Bank shares for every 25 HDFC Ltd shares. 100 HDFC Ltd shares became 168 HDFC Bank shares. Old HDFC shares.

Where the new shares may be

• Credited to your demat account: , if you had one linked to the holding at the time
• Issued as certificates and sent to your address: , in older mergers. If you moved, they may have come back undelivered.
• Held by the company for physical holders: who hadn't dematerialised, in a suspense or escrow account, until claimed
• Transferred to IEPF: , if dividends on the new shares went unclaimed for seven years

How to trace a company by its old name

• MCA's company master data: search the old name. The corporate identity number stays the same through a name change, and the record shows the current name.
• Stock exchange announcements: BSE and NSE sites carry schemes of arrangement and name changes for listed companies
• The new company's investor page: merged companies usually publish the scheme, swap ratio and record date, and say how old certificates are handled
• An IEPF search: on the shareholder's name: shares or dividends of the new company may already be listed there

What to send the registrar

Write to the registrar of the company as it exists now, not the old one. Send the old certificates (copies first), the folio number, and your KYC on Form ISR-1. Exchange of old certificates is a service request on Form ISR-4, and since April 2026 the resulting shares are credited to your demat account.

If the company was wound up or struck off rather than renamed or merged, the position is different, and usually less hopeful. Get a view on that before spending money.