Due diligence checklist: investment

Legal due diligence checklist for an investment in an established business, for a company which has a trading history and may also act as the parent company for a group of companies.

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When do I use this document?

  • for the legal due diligence for an investment transaction
  • where the subject company is an established business and has a trading history
  • as initial requests for the company to answer and provide supporting documents

What are the key features?

  • requests in tabular form, with the company’s answers to be inserted in the table
  • requests covering 10 key subject areas, including:
    • corporate
    • contracts
    • litigation and compliance
    • assets
    • intellectual property
    • commercial property
    • employees
    • finance and insurance
    • taxation

What other documents are available?

For a form of due diligence checklist for the investment in a start-up business, see

When do I use this document?

  • for the grant of both a put option and call option over shares in a private limited company
  • so that both the buyer has an option to purchase the shares and the seller has an option to sell the shares

What are the key features?

  • 24 clauses over 16 pages
  • grant of the put and call options, with related definitions of option shares, exercise conditions and exercise periods
  • put option exercise and form of exercise notice
  • call option exercise and form of exercise notice
  • mechanics for sale and purchase of option shares
  • warranties and undertakings from the seller

What else do I need to know?

The principal matters which the parties to a put and call option agreement will need to negotiate include:

  • option shares: the number of option shares
  • exercise conditions: whether either option exercise is subject to satisfaction of any pre-conditions
  • exercise periods: the time periods during which the seller may exercise the put option and the buyer may exercise the call option
  • exercise price: the price payable for the shares

What other docs are available?

For alternative option agreements over shares, see:

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Updated by a lawyer on 21/07/2025

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