Top 35 Contractors in NAICS 541320: Landscape Architectural Services, Jul 2025–Jun 2026

Parent companies by net contract obligations Jul 1, 2025 – Jun 30, 2026 Code page on GovTribe

The top 10 won 87% of NAICS 541320 contract dollars from July 2025 through June 2026

Contract obligations
$295,405,349 Net of deobligations, by contracts coded NAICS 541320
Contractors
40 Parent companies with an obligation
Largest contractor
Leidos Holdings, Inc. $72.3 million, 24.3% of obligations
Data as of

Contract actions from FPDS (SAM.gov). How the rankings work · Download

Full ranking

Rank Contractor Net obligations Share Trend
1
Leidos Holdings, Inc. Through Leidos, Inc.
Top agencies
$72,257,866
2
Booz Allen Hamilton Holding Corporation Through Booz Allen Hamilton Inc.
Top agencies
$39,080,268
3
Science Applications International Corporation
Top agencies
$30,493,284
4
Hdr, Inc. Through HDR Engineering, Inc.
Top agencies
$29,978,872
5
General Dynamics Corporation Through General Dynamics Information Technology, Inc.
Top agencies
$21,352,129
6
Jg&A-Tsg JV
Top agencies
$17,152,602
7
LMI Consulting, LLC
Top agencies
$16,447,803
8
Alliance WSP JV, LLC
Top agencies
$13,524,280
9
V2X, Inc. Through V2X Systems LLC
Top agencies
$9,975,510
10
Peraton Inc.
Top agencies
$9,476,236
11
Kbr, Inc. Through KBR Wyle Services, LLC
Top agencies
$9,475,390
12
The Urban Collaborative, Llc: Master Planning, Urban Design, and Architecture
Top agencies
$5,934,022
13
Klavon Tidewater, JV
Top agencies
$5,321,491
14
Makers Architecture and Urban Design LLP
Top agencies
$4,034,024
15
Michael Baker International, Inc.
Top agencies
$2,410,509
16
Trace Systems Inc.
Top agencies
$1,667,345
17
Tetra Tech, Inc.
Top agencies
$1,241,118
18
Siemens Corporation Through Siemens Government Technologies Inc.
Top agencies
$1,012,126
19
Semanticbits LLC Through ICF Incorporated, L.L.C.
Top agencies
$922,100
20
Klavon Design Associates Inc.
Top agencies
$818,896
21
Guidehouse Inc. 3 awardees, including Peraton Inc.
Top agencies
$771,869
22
Amentum Holdings, Inc. 2 awardees, including Amentum Services, Inc. and Amentum Technology, Inc.
Top agencies
$471,778
23
Golder Europe Service Centre SRL Through VGS Aircraft Services, Inc.
Top agencies
$345,065
24
Ti-Sdc, JV LLC
Top agencies
$266,377
25
Orcotec Construcciones
Top agencies
$123,695
26
HBO General Services
Top agencies
$80,750
27
Siemens Aktiengesellschaft Through Siemens Government Technologies Inc.
Top agencies
$75,113
28
Delta Jardineria S. De R.l. De C.V.
Top agencies
$63,037
29
Nana Regional Corporation, Inc. Through Akima Facilities Operations LLC
Top agencies
$47,108
30
Mori Engeijo, K.K.
Top agencies
$30,554
31
Akima Support Operations, LLC
Top agencies
$24,855
32
Metropolitan Security Services, Inc.
Top agencies
$16,262
33
Cacalia Design LLC
Top agencies
$8,250
34
ECO Properties LLC
Top agencies
$7,166
35
AES Group Inc.
Top agencies
$717
Show 10 more

35 of 40 contractors listed here. See the rest on GovTribe.

How this ranking works

  • Source: every contract action FPDS records (as published on SAM.gov) in the period, as GovTribe received it.
  • Amounts are net obligations: what was obligated, less what was deobligated. Shares are of $298 million obligated before deobligations, so they never pass 100%.
  • Parent companies: each action counts under the ultimate parent its award record names, or under the awardee when it names none, so no dollar counts twice. Parents of the same name (Inc., LLC and the like aside) count as one company, since FPDS records a company's parent under more than one UEI over time. GovTribe corrects a few parents and names by hand; see the corrections.
  • Period: the trailing 12 months end with the last month that ended at least 90 days ago, because the Department of Defense reports its contract actions to FPDS about 90 days late. The list is rebuilt each night.
  • Rank changes compare with Jul 2024–Jun 2025. "New" marks a company outside that period's top 500, and "Returned" one of those that was on an earlier fiscal year's list.
  • Rank lines show each company's rank on every fiscal year's list since FY2021, #1 at the top, on a scale that gives the top of the list more room. A dashed stretch spans years it wasn't on the list.
  • Placeholder recipients FPDS uses when it names no company ("Miscellaneous Foreign Contractors" and the like) aren't ranked.

Quick answers

Who were the top 10 NAICS 541320 contractors in Jul 2025–Jun 2026?

1. Leidos Holdings, Inc. ($72.3M), 2. Booz Allen Hamilton Holding Corporation ($39.1M), 3. Science Applications International Corporation ($30.5M), 4. Hdr, Inc. ($30M), 5. General Dynamics Corporation ($21.4M), 6. Jg&A-Tsg JV ($17.2M), 7. LMI Consulting, LLC ($16.4M), 8. Alliance WSP JV, LLC ($13.5M), 9. V2X, Inc. ($9.98M), 10. Peraton Inc. ($9.48M).

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