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The next generation of global investigations and business intelligence.

Who we are

We are a global due diligence, investigations, and business intelligence firm that helps clients identify and mitigate risk, shape strategy, and achieve success.

3,000+

investigative interviews completed globally

0+

countries where we’ve worked; >30 on the ground

$0T+

AUM by investor clients, including serving one-third of PEI Top 25 PE firms

0%

of AmLaw 50 served; 40% of AmLaw 100

100%+

organic growth in last five years

0%

employee-owned and independent

Testimonials

Quinlan's reports are very detailed and they are available on demand. Their client care is superb. You just know you are in good hands.

Chambers & Partners

Investigative Due Diligence - Global-wide - 2025

Quinlan is extraordinarily efficient in its work and delivers exactly what it promises.

Chambers & Partners

Business Intelligence & Investigations - Litigation Support - 2025

I am a big fan of the Quinlan group, I think it is absolutely fantastic. It is responsive, technical and very efficient.

Chambers & Partners

Business Intelligence & Investigations - Litigation Support - 2025

Quinlan Partners is very receptive to the specific needs of any ask and is creative in coming up with a tailored solutions that are commercially reasonable in complex situations.

Chambers & Partners

Investigative Due Diligence - Global-wide - 2025

The depth of the quality of the research they were able to do was exceptional. It goes far beyond a background check.

Chambers & Partners

Investigative Due Diligence - Global-wide - 2024

Their offering is bespoke and focused on quality rather than volume.

Chambers & Partners

Business Intelligence & Investigations - Litigation Support - 2024

Quinlan is efficient, fast and reliable. They jump in and get to work quickly. The team is very responsive and produces exceptional work product.

Chambers & Partners

Investigative Due Diligence - Global-wide - 2024

They have done a great job for us and really understand our pace and sensitivity. They seem to have great commercial judgment. They are able to understand the dynamics of a business and situation.

Chambers & Partners

Investigative Due Diligence - Global-wide - 2024

Their work has been incredibly valuable and provided insight for our clients on issues involving transactions and potential hires of key principals.

Chambers & Partners

Business Intelligence & Investigations - Litigation Support - 2024