United States · Federal contract register · Supplier record

HELLMUTH, OBATA & KASSABAUM, INC.

Line: Construction, office buildings (C1AA)Register loaded to September 2026Compiled 7 October 2026

HELLMUTH, OBATA & KASSABAUM, INC. — United States · Federal contract register · Supplier record: 10 contracts, all years ($41,439,210 · Sep 2009 – Aug 2025); $24.0M since January 2024 (5 contracts · 1 agency); 5th rank in the line (of 239 suppliers · 1.89%); 14 agencies never served ($729M on the line without HELLMUTH, OBATA & KASSABAUM, INC.).

Assay record ASY-US-0YYTANJ11G · Cite as: Assay Systems, “HELLMUTH, OBATA & KASSABAUM, INC. in the USAspending register”, https://assay-systems.com/register/us/hellmuth-obata-kassabaum-inc/

10
contracts, all years
$41,439,210 · Sep 2009 – Aug 2025
$24.0M
since January 2024
5 contracts · 1 agency
5th
rank in the line
of 239 suppliers · 1.89%
14
agencies never served
$729M on the line without HELLMUTH, OBATA & KASSABAUM, INC.

Own record by year

2020 onward
$15.4M
$2.0M
$6.4M
$17.6M
2020202120222023202420252026

Who buys from HELLMUTH, OBATA & KASSABAUM, INC.

since January 2024
1agencies
$24.0Mpaid
100.0%top buyer
General Services Administration100.0%
$24,000,172

Before 2024 only: Department of Defense.

The line

since January 2024
$925Mline value
715contracts
16agencies
239suppliers
81.9%held by top ten

Construction, office buildings (C1AA)

$766M
$123M
$35.2M
202420252026Jan–Sep
5thof 239 suppliers
$17,454,020HELLMUTH, OBATA & KASSABAUM, INC. in the line
1.89%share of the line
13.3%of $131,376,193 spent by General Services Administration

Agencies that buy the line and never bought from HELLMUTH, OBATA & KASSABAUM, INC.

14agencies
163contracts
$728,919,368since January 2024
Department of Justice7 contracts
$637,574,013
Department of State85 contracts
$51,734,438
Department of the Interior14 contracts
$16,379,748
Department of Veterans Affairs23 contracts
$9,427,242
Department of Homeland Security9 contracts
$6,844,375
Department of Labor2 contracts
$3,559,751
District of Columbia Courts5 contracts
$1,078,922
U.S. Agency for Global Media7 contracts
$771,061
Department of Agriculture5 contracts
$711,185
Department of Energy1 contract
$274,602
Department of Transportation1 contract
$215,288
Environmental Protection Agency2 contracts
$172,739
Millennium Challenge Corporation1 contract
$116,878
Department of Commerce1 contract
$59,128

How the line is bought

by value, since 2024
4%no competition
18%one applicant
0of these to HELLMUTH, OBATA & KASSABAUM, INC.
Competed, several suppliers applied428 contracts
$723,831,245 · 78.3%
Competed, one supplier applied212 contracts
$167,178,442 · 18.1%
Awarded directly, no competition75 contracts
$33,601,642 · 3.6%

Contracts reaching their end dates

Oct 2026 – October 2027
202contracts
$95,973,771end by October 2027
41end in December 2026 · $26.9M
35in agencies never served · $27.8M
$10.3M
$8.8M
$26.9M
$6.0M
$2.9M
$9.6M
$6.0M
$11.6M
$3.0M
$7.8M
$1.7M
$1.3M
Oct 2626 contractsNov 2620 contractsDec 2641 contractsJan 2724 contractsFeb 2710 contractsMar 2718 contractsApr 2714 contractsMay 277 contractsJun 2718 contractsJul 2710 contractsAug 277 contractsSep 277 contracts

Suppliers next to it in the line

since January 2024
DATTNER ARCHITECTS DPC3 contracts · 1 agency
$19,944,511
HELLMUTH, OBATA & KASSABAUM, INC.
$17,454,020
TEYA SUPPORT SERVICES LLC1 contract · 1 agency
$15,709,190
BURNS & MCDONNELL, INC.1 contract · 1 agency
$11,164,763

All 239 suppliers in the line

Fastest-growing supplier in the line

same line
+40%growth

Supplier UEI GB25L936WC44

2024 to date
$19,944,511
2022–2023
$14,253,619

The extract

Every buying office, every contract holder, value, number and end date behind the figures above.

Request extractSee a sample extract

Source: USAspending.gov, U.S. Department of the Treasury, Bureau of the Fiscal Service, usaspending.gov, accessed 30 September 2026.The data is available to copy, adapt, redistribute, or otherwise use for non-commercial or for commercial purposes (USAspending.gov, Licensing); no Dun & Bradstreet data is shown.