The IP Due Diligence Checklist Every PE Firm and Acquirer Needs Before Closing a Deal

Intellectual property is often the primary driver of enterprise value in an acquisition. For software companies, it is the codebase. For consumer brands, it is the trademark portfolio. For manufacturers, it is the combination of patents, trade secrets, and know-how that makes the product competitive.

And yet, IP due diligence is still one of the most under-resourced workstreams in M&A transactions. It is often allocated to general corporate counsel rather than specialist IP attorneys, happens too late in the process to affect deal structure or pricing, and routinely misses the issues that matter most.

The result: acquirers close deals with IP problems they did not know about, discover them post-closing when they are expensive to fix, and sometimes discover deal-breaking issues they cannot fix at all.

This guide is a practical IP due diligence framework for PE firms, corporate development teams, and their advisors. It covers what to look for, how to look for it, and what to do when you find problems.

Why IP Due Diligence Is Different From General Legal Due Diligence

General legal due diligence looks at contracts, litigation history, and corporate structure. IP due diligence goes deeper — it assesses whether the target company actually owns what it claims to own, whether that ownership is defensible, and whether the IP can do what the investment thesis says it can.

The key questions IP due diligence must answer:

• Does the company own its core intellectual property — or does someone else have a claim to it?
• Is that IP adequately protected in the markets where the business operates?
• Is the IP free from encumbrances — liens, licences, or restrictions that limit value?
• Are there infringement risks that could impair the business post-closing?
• Does the IP portfolio support the investment thesis?

The Seven Workstreams of IP Due Diligence

Workstream 1: Ownership and Chain of Title

For every material piece of IP, you need to verify that the target company actually owns it and that ownership is clean and unencumbered. What to examine:

• Employment agreements for all founders, key engineers, and technical staff — do they include IP assignment provisions?
• Contractor and consultant agreements — has every external contributor signed a written IP assignment? This is the most common gap.
• Co-founder agreements — if a founder left early, did they assign their IP rights to the company in writing?
• Acquisition history — is there a clean chain of title from the original creator to the target?
• Open source contributions — have any employees contributed company IP to open source projects?

Workstream 2: Patent Portfolio Analysis

If the target has a patent portfolio, your analysis should cover:

• Portfolio mapping — which patents cover which products, features, or processes?
• Claims analysis — how broad are the claims? Are they defensible against design-arounds?
• Maintenance status — are all patents current on maintenance fees?
• Geographic coverage — does the portfolio cover the markets where the business operates?
• Expiry timeline — when do key patents expire and how does that affect the competitive moat?
• Validity risks — have patents been challenged in IPR or PGR proceedings?

Workstream 3: Trademark and Brand Portfolio

Trademark due diligence is particularly important for consumer brands and SaaS companies with strong brand identity. What to examine:

• Registration status — is the core brand name registered in all key markets?
• Class coverage — are registrations in the right trademark classes?
• Geographic gaps — are there markets where the business operates without trademark protection?
• Pending applications and oppositions — are there live disputes over registrations?
• Domain name alignment — does the company own the key domain names that correspond to its trademarks?

Workstream 4: Trade Secret and Know-How Assessment

Trade secrets are the most difficult IP to assess in due diligence — by definition, they are confidential. But they are also often the most valuable IP a company has. Key areas to examine:

• What the company identifies as its trade secrets — ask them to describe their key confidential information
• The measures taken to protect those trade secrets — access controls, NDAs, employee training, document marking
• Third-party disclosure — has confidential information been shared with vendors or partners? Under what protections?
• Any known misappropriation incidents — former employees who took data, vendor breaches, or suspected theft

Workstream 5: Licence and Contract Review

IP-related contracts can dramatically affect the value and usability of the IP portfolio post-closing. For in-bound licences (IP the company licences from others):

• Are they assignable to the acquirer? Many licences prohibit assignment and could terminate at closing
• Are there change-of-control provisions that affect the licence?
• What are the royalty obligations and do they change post-acquisition?

For out-bound licences (IP the company has licensed to others):

• What rights have been granted? Are any licences exclusive in ways that limit the acquirer?
• Do any licensees have rights that survive acquisition?
• Are there most-favoured-nation clauses that could create obligations to third parties?

Workstream 6: Freedom to Operate and Infringement Risk

Even if the target’s own IP is clean, the business may be at risk from third-party IP. Freedom-to-operate (FTO) analysis asks: is there third-party IP that could block or limit what the business does? FTO analysis is particularly important for technology companies in patent-dense fields (AI, fintech, biotech), and any situation where a competitor is aggressive about IP enforcement. At a minimum, review whether the target has received any infringement claims, cease-and-desist letters, or litigation threats.

Workstream 7: Open Source Compliance

Open source software is present in virtually every technology product. The risk is concentrated in copyleft licences — GPL, LGPL, AGPL — that impose obligations to release source code if certain conditions are met. Open source due diligence should include:

• A software composition analysis (SCA) scan of the codebase to identify all open source components
• Review of licences for each component and the obligations they impose
• Assessment of whether the company is in compliance with those obligations

What to Do When You Find Problems

Category 1: Deal-Breakers

Rare but real. Examples: the company does not actually own its core technology; there is a legitimate infringement claim that could enjoin the core product; the primary trademark is subject to a cancellation action with strong grounds. Options: walk away, restructure the deal to exclude the problematic IP, or seek indemnification and escrow arrangements significant enough to cover the worst-case scenario.

Category 2: Valuation Adjustments

The most common finding. Examples: trademark gaps in international markets, missing IP assignments from contractors, patents nearing expiry. These findings should translate into purchase price adjustments, post-closing obligations for the seller, or holdback provisions in the purchase agreement.

Category 3: Post-Closing Remediation

Fixable issues that the acquirer can address post-closing. Document these findings and budget for them. They are not reasons to kill a deal but they are costs that need to be factored in.

IP Due Diligence Checklist for Acquirers

Ownership and Chain of Title

• ✓Employment agreements for all founders and key technical staff reviewed for IP assignment provisions
• ✓Contractor and consultant agreements reviewed — written IP assignments confirmed for all material contributors
• ✓Co-founder and early team departure documentation reviewed

Patent Portfolio

• ✓Full patent portfolio list obtained and mapped to products/features
• ✓Maintenance fee status confirmed for all active patents
• ✓Geographic coverage assessed against business footprint
• ✓IPR/PGR history reviewed

Trademark Portfolio

• ✓Trademark registrations confirmed in all material markets
• ✓Class coverage reviewed against current products and services
• ✓Pending applications and oppositions identified
• ✓Domain name portfolio reviewed and aligned with trademark registrations

Trade Secrets, Contracts & Open Source

• ✓Key trade secrets identified and protection measures documented
• ✓All material in-bound IP licences reviewed for assignability and change-of-control provisions
• ✓All material out-bound licences reviewed for exclusivity and survival
• ✓FTO analysis commissioned for core technology in key markets
• ✓Software composition analysis completed and copyleft licence compliance confirmed

Disclaimer: This article provides general information about international IP strategy and should not be relied upon as legal advice. IP laws vary significantly by jurisdiction and every business situation is unique. For specific guidance on your IP protection needs, please consult with a qualified attorney in your jurisdiction.