United States · Federal contract register · Supplier record

YANGCHEN L. ROTTO

Line: Professional, engineering and technical (R425)Register loaded to September 2026Compiled 17 October 2026

YANGCHEN L. ROTTO — United States · Federal contract register · Supplier record: 2 contracts, all years ($2,392 · Jun 2023 – May 2025); $290 since January 2024 (1 contract · 1 agency); 2689th rank in the line (of 2,692 suppliers · 0.0%); 39 agencies never served ($34.6B on the line without YANGCHEN L. ROTTO).

Assay record ASY-US-1EATJGF1GZ · Cite as: Assay Systems, “YANGCHEN L. ROTTO: 1 government contract in the United States since 2024”, https://assay-systems.com/register/us/yangchen-l-rotto/

2
contracts, all years
$2,392 · Jun 2023 – May 2025
$290
since January 2024
1 contract · 1 agency
2689th
rank in the line
of 2,692 suppliers · 0.0%
39
agencies never served
$34.6B on the line without YANGCHEN L. ROTTO

Own record by year

2023 onward
$2.1K
$290
2023202420252026

Who buys from YANGCHEN L. ROTTO

since January 2024
1agencies
$290paid
100.1%top buyer
Department of the Interior100.0%
$290

Won without a rival

2025-05-01 – 2025-09-16
2uncontested awards
100%of its awards
0without a competition
2single bid

YANGCHEN L. ROTTO won 2 of its 2 public contract awards in United States without a rival from 2025-05-01 to 2025-09-16, worth $-1,968: 0 without a competition and 2 after a competition that drew a single bid. 1 buyer awarded it without a rival, the largest U.S. Geological Survey with 2.

Buyers: U.S. Geological Survey (2)

Every uncontested award of YANGCHEN L. ROTTO · United States: all uncontested awards

The line

since January 2024
$34.8Bline value
9,940contracts
40agencies
2,692suppliers
20.3%held by top ten

Professional, engineering and technical (R425)

$18.1B
$12.1B
$4.6B
202420252026Jan–Sep
2689thof 2,692 suppliers
$290YANGCHEN L. ROTTO in the line
0.0%share of the line
0.0%of $209,476,543 spent by Department of the Interior

Agencies that buy the line and never bought from YANGCHEN L. ROTTO

39agencies
9,563contracts
$34,559,156,484since January 2024
Department of Defense6,551 contracts
$28,824,356,510
General Services Administration126 contracts
$1,321,557,955
Department of Transportation675 contracts
$1,123,112,971
Department of Energy167 contracts
$810,272,357
Department of Homeland Security211 contracts
$697,776,866
Department of Commerce436 contracts
$391,080,812
National Aeronautics and Space Administration147 contracts
$303,818,707
Department of Veterans Affairs308 contracts
$207,795,063
Department of Health and Human Services122 contracts
$177,478,072
Department of Justice125 contracts
$161,277,109
Department of State142 contracts
$118,928,460
Environmental Protection Agency239 contracts
$94,522,780
Department of the Treasury23 contracts
$92,759,835
Agency for International Development19 contracts
$79,181,376
Department of Agriculture74 contracts
$42,227,889
Department of Housing and Urban Development6 contracts
$26,550,661
National Archives and Records Administration14 contracts
$22,701,357
Nuclear Regulatory Commission18 contracts
$11,715,936
Smithsonian Institution90 contracts
$11,632,528
Small Business Administration3 contracts
$7,585,123
Commodity Futures Trading Commission5 contracts
$7,271,750
Consumer Product Safety Commission3 contracts
$4,689,351
Department of Education2 contracts
$4,528,772
United States Trade and Development Agency1 contract
$3,855,486
National Science Foundation3 contracts
$2,926,749
Consumer Financial Protection Bureau1 contract
$2,099,835
Occupational Safety and Health Review Commission20 contracts
$1,730,404
District of Columbia Courts3 contracts
$1,624,660
Selective Service System5 contracts
$1,135,958
Millennium Challenge Corporation1 contract
$924,209
Federal Communications Commission6 contracts
$679,992
Committee for Purchase from People Who Are Blind or Severely Disabled2 contracts
$412,556
Executive Office of the President2 contracts
$377,400
Defense Nuclear Facilities Safety Board2 contracts
$213,442
U.S. International Development Finance Corporation1 contract
$121,913
National Gallery of Art3 contracts
$96,428
U.S. Agency for Global Media1 contract
$57,500
United States Chemical Safety Board4 contracts
$55,042
Merit Systems Protection Board2 contracts
$22,671

How the line is bought

by value, since 2024
43%no competition
12%one applicant
0of these to YANGCHEN L. ROTTO
Competed, several suppliers applied5,006 contracts
$15,655,583,612 · 45.0%
Awarded directly, no competition3,740 contracts
$14,923,048,081 · 42.9%
Competed, one supplier applied1,194 contracts
$4,190,001,334 · 12.1%

Contracts reaching their end dates

Oct 2026 – October 2027
2,911contracts
$15,159,283,501end by October 2027
400end in March 2027 · $2.3B
2,804in agencies never served · $15.1B
$165M
$684M
$1.9B
$1.9B
$1.5B
$2.3B
$1.6B
$1.6B
$1.5B
$518M
$465M
$976M
$49.8M
Oct 2687 contractsNov 26175 contractsDec 26318 contractsJan 27256 contractsFeb 27247 contractsMar 27400 contractsApr 27251 contractsMay 27299 contractsJun 27243 contractsJul 27134 contractsAug 27154 contractsSep 27327 contractsOct 2720 contracts

Suppliers next to it in the line

since January 2024
CINCINNATI INCORPORATED1 contract · 1 agency
$500
YANGCHEN L. ROTTO
$290
A.I.S., INC.1 contract · 1 agency
$250
FRAYM, INC.1 contract · 1 agency
$200

All 2,692 suppliers in the line

The extract

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

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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.