Mayer Brown LLP
Chicago, IL Doing business as Mayer Brown LLP
- UEI
- LH1RQPGDUVK7
- CAGE
- 4BDX5
- Primary NAICS
- 541110 Offices of Lawyers
- SAM.gov registration
- Active through
Company facts
- Self-certified in SAM.gov
- Entity structure
- Partnership or Limited Liability Partnership
- NAICS codes registered in SAM.gov
-
- 541110 Offices of Lawyers Primary
- SAM.gov registration date
- Physical address
- 71 S Wacker Dr # 3300, Chicago, IL 60606, USA
- Website
- mayerbrown.com
- Founded
- 1863
- Employees
- 1K-5K
- Estimated annual revenue
- $1B-$10B
- Industry
-
- Consumer Discretionary
- Diversified Consumer Services
- Specialized Consumer Services
- Legal Services
- SIC code
- 81 Legal Services
- Profiles
Registration and certifications come from SAM.gov and the SBA; company details from public web sources. Updated .
Recent federal awards
| Award | Agency | Obligated | Awarded |
|---|---|---|---|
| Valor capital - DFC-valor americas strategic capital, l.p. | International Development Finance Corporation | $450,562 | |
| Gateway strategic fund 9100000463 - 9100000462 | International Development Finance Corporation | $340,404 | |
| Atlas agro brasil fertilizantes ltda - 9100000181 | International Development Finance Corporation | $289,994 | |
| DP world berbera-9100000264 | International Development Finance Corporation | $586,018 | |
| (new-IDIQ) metalfor s.a.-9000117332 | International Development Finance Corporation | $799,159 |
About Mayer Brown LLP
Mayer Brown LLP, a Chicago-headquartered global law firm structured as a partnership or limited liability partnership, operates as a prime contractor providing international legal advisory services to the U.S. federal government on a full-and-open competitive basis with no set-aside designations across its federal footprint.
The firm's federal work centers on transactional legal support, due diligence, documentation, and advisory services for complex development finance initiatives. Representative delivery orders under the International Legal Support Services (ILSS) IDIQ illustrate the scope: a $380,055 order from the International Development Finance Corporation for legal advisory supporting the ISQ Asia Energy Infrastructure Fund (May 2026), a $2.587 million labor-hour order for the Twigg Exploration and Mining transaction extended through August 2027, a $515,000 delivery order for legal support of DFC's loan portfolio guaranty transactions (June 2023), and a $291,320 delivery order for three solar energy projects in Panama (August 2021). The firm also held a single purchase order from the US Agency for Global Media for immigration attorney services valued at $59,400 (December 2021).
Customer concentration is absolute: the International Development Finance Corporation accounts for 42 of 46 awards (100% coverage by count and by potential value) totaling $74.1 million in combined potential value. The Overseas Private Investment Corporation placed two orders ($452 thousand), the Department of Housing and Urban Development placed one ($1 million), and the US Agency for Global Media placed one ($59 thousand). Mayer Brown holds no subcontract footprint — 100% of awards are prime contracts.
Mayer Brown sits on the International Legal Support Services (ILSS) $50 million multiple-award IDIQ issued by DFC on August 19, 2021, with an ultimate completion date of August 19, 2026. The firm has placed 38 task orders under ILSS totaling $8.8 million in combined potential value, spanning investment funds, equity financing arrangements, loan guarantees, political risk insurance, and transactional support for development projects across Latin America, Africa, India, and Southeast Asia. The firm's ILSS work typically runs three years per delivery order, with individual task order ceilings ranging from approximately $22,000 to $2.587 million. Place of performance splits between Washington, D.C. and Chicago.
Activity has accelerated year over year — one award in 2022, eight in 2023, eighteen in 2024, six in 2025, and four in 2026 through May. Fourteen awards carrying $5 million in combined potential value reach ultimate completion within the next twenty-four months, creating recompete exposure tied to DFC's development finance transaction pipeline. The ILSS parent vehicle itself faces expiration on August 19, 2026, signaling a pending recompete cycle for the underlying IDIQ.
Mayer Brown's federal practice is grounded in NAICS 541110 (Offices of Lawyers), with 43 of 46 awards classified under that code and the remainder split between All Other Legal Services and Legal Counsel and Prosecution. The firm competes under full-and-open solicitations; no awards carry 8(a), HUBZone, SDVOSB, WOSB, or other small-business set-aside designations.
Contract vehicles
Quick answers
What is Mayer Brown LLP's UEI?
Mayer Brown LLP's Unique Entity ID (UEI) in SAM.gov is LH1RQPGDUVK7.
What is Mayer Brown LLP's CAGE code?
Mayer Brown LLP's CAGE code is 4BDX5.
What is Mayer Brown LLP's primary NAICS code?
Mayer Brown LLP's primary NAICS code is 541110 (Offices of Lawyers).
Where is Mayer Brown LLP located?
Mayer Brown LLP's physical address in SAM.gov is 71 S Wacker Dr # 3300, Chicago, IL 60606, USA.
Is Mayer Brown LLP registered in SAM.gov?
Yes. Mayer Brown LLP's SAM.gov registration is active through March 2, 2027.
Which contract vehicles does Mayer Brown LLP hold?
Mayer Brown LLP holds a place on 1 federal contract vehicle: ILSS.
What is Mayer Brown LLP's most recent federal award?
Mayer Brown LLP's most recent federal contract award is Valor capital - DFC-valor americas strategic capital, l.p (77344426F0112), from International Development Finance Corporation, on August 31, 2026.
On GovTribe
See Mayer Brown LLP's full federal record
- Federal contract awards
- IDV awards
- Contract vehicles
- Funding analysis by agency, NAICS and set-aside
- Similar vendors