Change of control review: documents to prepare
A change of control review checks whether a licence, an assignment or a security interest survives when one of the contracting parties is sold, merged or restructured. The review confirms who counts as the new controller, whether consent is required, and what happens if consent is refused. Prepare the underlying agreement, the corporate resolution that triggered the change, and a current ownership chart before contacting the other side. With a complete file, most reviews close in two to six weeks.
Why the review exists
A change of control clause is not automatic. It is a contractual mechanism the parties negotiated themselves and wrote into the licence or transfer agreement. The clause defines a trigger — typically a change in majority shareholding, a merger, or a sale of substantially all assets — and attaches a consequence to that trigger: notice, consent, termination, or a right to renegotiate. Without a written trigger, a change in ownership on one side usually has no effect on the agreement at all.
The review answers three questions before either side takes a position: has the trigger actually occurred, does the clause require consent or only notice, and what happens once the deadline for a response passes without an answer. Those three questions drive the document list below.
Documents to prepare
Assemble the file before the conversation starts, not after. A partial file slows the review and gives the other side room to argue that notice was defective.
| Document | Why it is needed |
|---|---|
| The licence or transfer agreement, with all amendments | Contains the trigger definition and the consent or notice clause |
| The corporate resolution or share purchase agreement causing the change | Fixes the date the trigger occurred |
| A current ownership or corporate structure chart | Shows who the new controller actually is |
| Prior correspondence about the agreement | Shows whether either side already treated the change as known |
| A list of registered rights covered by the agreement | Confirms what needs reassignment or re-recording if consent is granted |
Ownership questions are not always as clean as a share transfer. When a contractor or service provider claims ownership of a deliverable instead of the counterparty, the review runs along a different track — see Biotech and life sciences a contractor claims ownership of for how that dispute is typically framed before it reaches this stage.
Who decides and how long it takes
There is usually no external decision-maker at this stage. The parties decide between themselves, guided by the clause they signed. A decision-maker becomes involved only once the dispute escalates into a formal claim, and even then the first task is to weigh the same documents the parties already hold — a comparable weighing exercise is described in How design invalidity trade mark what the decision maker.
A review with a complete file closes in two to six weeks. Missing documents, a silent counterparty, or a chain of holding companies each add weeks rather than days. The point of no return is usually the deadline written into the clause itself: once it passes without notice or consent, the agreement's default consequence — often termination or automatic assignment — takes effect regardless of what either side intended.
What to do
- Confirm the trigger date from the corporate resolution or transaction document, not from a press release.
- Pull the agreement and identify the exact wording of the change of control clause.
- Check whether the clause requires consent, notice only, or is silent on the point.
- Send notice within the window the clause sets, in writing, to the address named in the agreement.
- Record the date notice was sent and keep proof of delivery.
- If consent is required, request it in writing and set your own response deadline in the request.
Two common forks
If the agreement is silent on change of control, the review usually ends with a short memo confirming the agreement survives unchanged. If the clause requires consent and consent is refused, the review moves into a negotiation or termination track, and the file assembled above becomes the basis for that next step.
What this page does not cover
This page covers the review itself: what to gather and how the timeline runs. It does not cover how to draft a change of control clause from scratch, how to value a licence after a change of control, or how a dispute over the clause is argued once it reaches a decision-maker. It also does not cover a portfolio already used as loan security, a licence where the underlying right sits on a blockchain register rather than a national one, or a review that overlaps with a running appeal deadline or with prior art surfacing after grant. Each of those situations has its own starting point.
Related publications
For a related drafting stage in the same family of agreements, see Field-of-use drafting step by step.
If your file touches one of these, start there instead
A licence recorded partly on-chain raises its own mismatch question — see When a transfer on-chain is not recorded off-chain: what.
A portfolio already pledged as loan security follows a different sequence — see A portfolio is pledged to a lender patent.
A change of control that coincides with a running appeal deadline needs the deadline addressed first — see The deadline for appeal has started patent.
Prior art surfacing after grant changes the value of what is being transferred — see Prior art surfaces after grant patent what it costs.
Verified
This overview reflects the firm's internal review procedure and is checked against current practice on a rolling basis. It does not rely on a single statutory source, because the change of control mechanism is contractual rather than a fixed legal requirement. For background on how the firm itself is structured and how files are handled internally, see How the firm is set up in practice.
FAQ
How long does change of control review take in practice?
With a complete file, two to six weeks. A silent counterparty, missing corporate documents, or a chain of holding entities extends the timeline by weeks rather than days.
Which documents are needed to start?
The agreement with all amendments, the resolution or transaction document that triggered the change, and a current ownership chart. Correspondence and a list of registered rights help but are not strictly required to open the review.
What happens if the other side does not respond?
The deadline written into the clause governs. Once it passes without a response, the agreement's default consequence — often termination or automatic assignment — applies, regardless of whether either side intended that outcome.