Concentration

Agency HHI in this sample: 3867 (sum of squared agency shares of |obligation| × 10,000). Calculated, not observed.

Source, date, method

Coverage status: sample — SAMPLE of the first CSV member, using only R2 chunk part-00 (250 MiB). The member continues into later parts. These are not full-archive national totals.

Last successful snapshot: 2026-08-24T13:08:39Z UTC. Archive date: 2026-08-18.

Freshness: held snapshot; this page does not imply live or complete national coverage.

Source: USAspending.gov Award Data Archive · file FY2025_All_Contracts_Full_20260806.zip · member FY2025_All_Contracts_Full_20260806_1.csv.

Method: Sum federal_action_obligation by awarding_agency_code x US fiscal year of action_date (FY starts 1 October). Award counts are distinct contract_award_unique_key values in this sample. Deobligations (negative) are included. Min-N: agency x FY page only if award_count >= 10 or |obligation| >= 10000000. Recipient lists require at least 3 transaction rows in this sample. Recipient award_count on lists is transaction rows, labelled as such.

Rows used: 833150 money records. Amounts are US dollars. All percentages use this loaded sample only.

First published snapshot on this URL. Loaded-set figures have not changed versus a previous snapshot because none existed.

Derived from USAspending.gov (U.S. Department of the Treasury, Bureau of the Fiscal Service). U.S. government work, public domain (17 U.S.C. 105). This site is not the official USAspending search and is not endorsed by Treasury or OMB.

Agency shares (top 20)

Agency obligation shares, sample

Highest hub HHI (recipient concentration)

Agency hub	HHI	Obligation
Library of Congress	10000	−$3,000
Defense Nuclear Facilities Safety Board	7878.7	$3,142,488
Federal Labor Relations Authority	6399.2	$1,062,355
Merit Systems Protection Board	4499.5	$1,024,796
National Science Foundation	4227.8	$275,209,795
National Endowment for the Arts	4118.5	$2,342,572
Small Business Administration	3872.8	−$3,363,740
Selective Service System	3827.8	$4,015,252
United States Chemical Safety Board	3487.5	$629,982
Corporation for National and Community Service	3179.6	$17,505,848
Institute of Museum and Library Services	2207.6	$12,138,396
Federal Mediation and Conciliation Service	2036.4	$1,673,113
Federal Maritime Commission	2028.3	$1,446,186
Pension Benefit Guaranty Corporation	1970.5	$32,099,223
National Transportation Safety Board	1908.6	$15,329,781