Top 92 Contractors in NAICS 334517: Irradiation Apparatus Manufacturing, Aug 2025–Jul 2026

Parent companies by net contract obligations Aug 1, 2025 – Jul 31, 2026 Code page on GovTribe

The latest 12 months. See the newest fiscal year's list: Top Contractors in NAICS 334517: Irradiation Apparatus Manufacturing, FY2025.

The top 10 won 91% of NAICS 334517 contract dollars from August 2025 through July 2026

Ranking facts

Contract obligations
$1,118,589,937 Net of deobligations, by contracts coded NAICS 334517
Contractors
95 Parent companies with an obligation
Largest contractor
Siemens Corporation $247 million, 21.4% of obligations
Data as of

Contract actions from FPDS (SAM.gov). How the rankings work · Download all 92 rows as CSV · Free to reuse with credit to GovTribe (CC BY 4.0)

Full ranking

Rank Contractor Net obligations Share Trend
1 $246,559,450
Rank history: not on the FY2021–FY2023 lists, #1 in FY2024 and #1 in FY2025; unchanged since Aug 2024–Jul 2025.
2 $188,585,117
Rank history: #4 in FY2021, #2 in FY2022, #2 in FY2023, #2 in FY2024 and #2 in FY2025; unchanged since Aug 2024–Jul 2025.
3 $168,531,536
Rank history: #5 in FY2021, #3 in FY2022, #3 in FY2023, not on the FY2024 list and #3 in FY2025; new, not ranked in Aug 2024–Jul 2025.
4 $159,696,206
Rank history: #3 in FY2021, #9 in FY2022, #4 in FY2023, not on the FY2024 list and #6 in FY2025; new, not ranked in Aug 2024–Jul 2025.
5 $97,245,711
Rank history: not on the FY2021–FY2023 lists, #9 in FY2024 and #5 in FY2025; down 1 since Aug 2024–Jul 2025.
6 $94,885,629
Rank history: #98 in FY2021, #82 in FY2022, not on the FY2023 list, #3 in FY2024 and #4 in FY2025; up 4 since Aug 2024–Jul 2025.
7 $31,853,479
Rank history: #6 in FY2021, #65 in FY2022, #19 in FY2023, #12 in FY2024 and #8 in FY2025; up 1 since Aug 2024–Jul 2025.
8 $25,230,672
Rank history: not on the FY2021–FY2025 lists; new, not ranked in Aug 2024–Jul 2025.
9 $21,948,536
Rank history: #9 in FY2021, #5 in FY2022, #8 in FY2023, #24 in FY2024 and #10 in FY2025; up 68 since Aug 2024–Jul 2025.
10 $19,191,667
Rank history: not on the FY2021–FY2023 lists, #93 in FY2024 and #11 in FY2025; up 10 since Aug 2024–Jul 2025.
11 $11,026,002
Rank history: not on the FY2021–FY2023 lists, #10 in FY2024 and #9 in FY2025; down 2 since Aug 2024–Jul 2025.
12
Osage Nation Energy Services LLC
$8,857,359
Rank history: not on the FY2021–FY2024 lists and #12 in FY2025; new, not ranked in Aug 2024–Jul 2025.
13 $8,775,314
Rank history: #16 in FY2021, #17 in FY2022, #25 in FY2023, #76 in FY2024 and #34 in FY2025; up 21 since Aug 2024–Jul 2025.
14 $7,082,447
Rank history: not on the FY2021 list, #14 in FY2022, #45 in FY2023, #26 in FY2024 and #14 in FY2025; down 1 since Aug 2024–Jul 2025.
15 $5,022,264
Rank history: #28 in FY2021, #18 in FY2022, #21 in FY2023, #70 in FY2024 and #19 in FY2025; new, not ranked in Aug 2024–Jul 2025.
16 $4,275,898
Rank history: not on the FY2021–FY2022 lists, #17 in FY2023, #27 in FY2024 and #20 in FY2025; up 6 since Aug 2024–Jul 2025.
17 $3,307,525
Rank history: #11 in FY2021, #71 in FY2022, #67 in FY2023, #67 in FY2024 and #21 in FY2025; up 41 since Aug 2024–Jul 2025.
18 $2,433,615
Rank history: not on the FY2021–FY2023 lists, #21 in FY2024 and #28 in FY2025; up 1 since Aug 2024–Jul 2025.
19 $1,812,925
Rank history: #24 in FY2021, #16 in FY2022, #16 in FY2023, #29 in FY2024 and #15 in FY2025; down 4 since Aug 2024–Jul 2025.
20 $1,647,592
Rank history: not on the FY2021–FY2024 lists and #29 in FY2025; up 12 since Aug 2024–Jul 2025.
21 $1,254,087
Rank history: #23 in FY2021, #31 in FY2022, #24 in FY2023, #17 in FY2024 and #24 in FY2025; up 2 since Aug 2024–Jul 2025.
22
Raysearch Americas Inc.
$1,040,550
Rank history: not on the FY2021–FY2023 lists, #32 in FY2024 and #23 in FY2025; down 1 since Aug 2024–Jul 2025.
23 $880,800
Rank history: #14 in FY2021, #15 in FY2022, #30 in FY2023, #23 in FY2024 and #27 in FY2025; up 5 since Aug 2024–Jul 2025.
24 $769,393
Rank history: not on the FY2021 list, #21 in FY2022, not on the FY2023–FY2024 lists and #30 in FY2025; new, not ranked in Aug 2024–Jul 2025.
25
Bruker AXS LLC
$557,998
Rank history: not on the FY2021–FY2025 lists; new, not ranked in Aug 2024–Jul 2025.
26 $551,188
Rank history: not on the FY2021–FY2024 lists and #57 in FY2025; new, not ranked in Aug 2024–Jul 2025.
27 $515,260
Rank history: #32 in FY2021, #34 in FY2022, #78 in FY2023, not on the FY2024 list and #74 in FY2025; new, not ranked in Aug 2024–Jul 2025.
28 $393,000
Rank history: not on the FY2021 list, #75 in FY2022, #49 in FY2023, not on the FY2024 list and #37 in FY2025; new, not ranked in Aug 2024–Jul 2025.
29 $361,000
Rank history: #84 in FY2021, #27 in FY2022, #47 in FY2023, #47 in FY2024 and #45 in FY2025; up 16 since Aug 2024–Jul 2025.
30 $355,000
Rank history: not on the FY2021–FY2023 lists, #41 in FY2024 and #40 in FY2025; up 8 since Aug 2024–Jul 2025.
31 $316,750
Rank history: #43 in FY2021, #53 in FY2022, #98 in FY2023, not on the FY2024 list and #36 in FY2025; up 20 since Aug 2024–Jul 2025.
32 $295,000
Rank history: #40 in FY2021, #37 in FY2022, #33 in FY2023, #38 in FY2024 and #17 in FY2025; down 15 since Aug 2024–Jul 2025.
33 $290,408
Rank history: not on the FY2021–FY2024 lists and #47 in FY2025; new, not ranked in Aug 2024–Jul 2025.
34 $255,757
Rank history: #36 in FY2021, #32 in FY2022, #32 in FY2023, #73 in FY2024 and #42 in FY2025; up 25 since Aug 2024–Jul 2025.
35 $249,916
Rank history: not on the FY2021–FY2024 lists and #43 in FY2025; new, not ranked in Aug 2024–Jul 2025.
36 $247,393
Rank history: not on the FY2021 list, #67 in FY2022 and not on the FY2023–FY2025 lists; new, not ranked in Aug 2024–Jul 2025.
37 $235,735
Rank history: #25 in FY2021, #45 in FY2022, not on the FY2023–FY2024 lists and #61 in FY2025; up 27 since Aug 2024–Jul 2025.
38 $145,831
Rank history: #61 in FY2021, #51 in FY2022 and not on the FY2023–FY2025 lists; new, not ranked in Aug 2024–Jul 2025.
39 $142,635
Rank history: not on the FY2021–FY2025 lists; new, not ranked in Aug 2024–Jul 2025.
40 $125,000
Rank history: not on the FY2021–FY2024 lists and #53 in FY2025; new, not ranked in Aug 2024–Jul 2025.
41 $124,586
Rank history: not on the FY2021–FY2024 lists and #54 in FY2025; new, not ranked in Aug 2024–Jul 2025.
42 $118,568
Rank history: not on the FY2021–FY2023 lists, #91 in FY2024 and #32 in FY2025; down 2 since Aug 2024–Jul 2025.
43 $113,340
Rank history: not on the FY2021–FY2022 lists, #34 in FY2023, not on the FY2024 list and #55 in FY2025; up 14 since Aug 2024–Jul 2025.
44
AGFA-GEVAERT Through Agfa US Corp
$108,004
Rank history: not on the FY2021–FY2023 lists, #58 in FY2024 and #48 in FY2025; up 6 since Aug 2024–Jul 2025.
45 $101,362
Rank history: not on the FY2021–FY2023 lists, #56 in FY2024 and not on the FY2025 list; up 3 since Aug 2024–Jul 2025.
46 $100,630
Rank history: #31 in FY2021, #19 in FY2022, #43 in FY2023, #34 in FY2024 and #25 in FY2025; down 21 since Aug 2024–Jul 2025.
47 $96,984
Rank history: #21 in FY2021, not on the FY2022–FY2024 lists and #59 in FY2025; up 14 since Aug 2024–Jul 2025.
48 $95,472
Rank history: not on the FY2021 list, #95 in FY2022, not on the FY2023–FY2024 lists and #58 in FY2025; new, not ranked in Aug 2024–Jul 2025.
49 $94,500
Rank history: #52 in FY2021, not on the FY2022 list, #29 in FY2023, not on the FY2024 list and #13 in FY2025; down 35 since Aug 2024–Jul 2025.
50
Aviation Defense Service Through Dornier Medtech America, Inc.
$87,554
Rank history: not on the FY2021–FY2022 lists, #44 in FY2023, #30 in FY2024 and #26 in FY2025; down 23 since Aug 2024–Jul 2025.
51 $85,511
Rank history: #63 in FY2021, #60 in FY2022, not on the FY2023–FY2024 lists and #33 in FY2025; down 18 since Aug 2024–Jul 2025.
52 $84,949
Rank history: not on the FY2021–FY2023 lists, #69 in FY2024 and #68 in FY2025; up 18 since Aug 2024–Jul 2025.
53 $84,864
Rank history: not on the FY2021–FY2024 lists and #88 in FY2025; up 35 since Aug 2024–Jul 2025.
54 $80,670
Rank history: #54 in FY2021, #24 in FY2022, #11 in FY2023, #22 in FY2024 and #18 in FY2025; down 38 since Aug 2024–Jul 2025.
55 $77,703
Rank history: not on the FY2021–FY2022 lists, #100 in FY2023 and not on the FY2024–FY2025 lists; new, not ranked in Aug 2024–Jul 2025.
56 $76,700
Rank history: #78 in FY2021, #62 in FY2022, #69 in FY2023, #59 in FY2024 and #62 in FY2025; up 7 since Aug 2024–Jul 2025.
57 $75,872
Rank history: not on the FY2021 list, #74 in FY2022, #75 in FY2023, #74 in FY2024 and #66 in FY2025; up 12 since Aug 2024–Jul 2025.
58
Point Security Inc
$72,917
Rank history: #71 in FY2021, not on the FY2022 list, #55 in FY2023, #31 in FY2024 and #56 in FY2025; down 28 since Aug 2024–Jul 2025.
59 $66,478
Rank history: not on the FY2021–FY2025 lists; new, not ranked in Aug 2024–Jul 2025.
60 $65,707
Rank history: #82 in FY2021, #86 in FY2022, #90 in FY2023, #53 in FY2024 and #67 in FY2025; up 12 since Aug 2024–Jul 2025.
61 $65,307
Rank history: #5 in FY2021, #3 in FY2022, #3 in FY2023, #5 in FY2024 and #44 in FY2025; down 15 since Aug 2024–Jul 2025.
62 $64,850
Rank history: not on the FY2021–FY2025 lists; new, not ranked in Aug 2024–Jul 2025.
63 $63,926
Rank history: not on the FY2021 list, #72 in FY2022, #27 in FY2023, #18 in FY2024 and #46 in FY2025; down 45 since Aug 2024–Jul 2025.
64 $58,520
Rank history: not on the FY2021–FY2022 lists, #41 in FY2023, #43 in FY2024 and not on the FY2025 list; new, not ranked in Aug 2024–Jul 2025.
65 $51,800
Rank history: not on the FY2021–FY2022 lists, #83 in FY2023, not on the FY2024 list and #70 in FY2025; new, not ranked in Aug 2024–Jul 2025.
66
B & H International LLC
$51,440
Rank history: not on the FY2021–FY2024 lists and #71 in FY2025; new, not ranked in Aug 2024–Jul 2025.
67 $51,011
Rank history: not on the FY2021–FY2024 lists and #52 in FY2025; down 11 since Aug 2024–Jul 2025.
68
Pronova Solutions, LLC
$41,600
Rank history: not on the FY2021–FY2025 lists; new, not ranked in Aug 2024–Jul 2025.
69
Lista Italia SRL
$40,004
Rank history: not on the FY2021–FY2024 lists and #75 in FY2025; new, not ranked in Aug 2024–Jul 2025.
70
Lake Superior X-RAY Inc
$37,500
Rank history: not on the FY2021–FY2024 lists and #76 in FY2025; new, not ranked in Aug 2024–Jul 2025.
71 $34,950
Rank history: not on the FY2021 list, #28 in FY2022, #18 in FY2023, not on the FY2024 list and #78 in FY2025; new, not ranked in Aug 2024–Jul 2025.
72
Antech Diagnostics Inc
$33,808
Rank history: not on the FY2021–FY2024 lists and #80 in FY2025; new, not ranked in Aug 2024–Jul 2025.
73 $33,287
Rank history: #69 in FY2021, #49 in FY2022, not on the FY2023 list, #61 in FY2024 and #81 in FY2025; up 3 since Aug 2024–Jul 2025.
74 $33,249
Rank history: #46 in FY2021, #39 in FY2022, #38 in FY2023, #48 in FY2024 and #73 in FY2025; down 12 since Aug 2024–Jul 2025.
75 $32,638
Rank history: not on the FY2021–FY2024 lists and #82 in FY2025; new, not ranked in Aug 2024–Jul 2025.
76 $27,820
Rank history: not on the FY2021–FY2025 lists; new, not ranked in Aug 2024–Jul 2025.
77
RAD Source Technologies Inc.
$24,788
Rank history: not on the FY2021–FY2023 lists, #51 in FY2024 and #35 in FY2025; down 41 since Aug 2024–Jul 2025.
78
Probo Medical LLC
$22,500
Rank history: not on the FY2021–FY2024 lists and #90 in FY2025; up 14 since Aug 2024–Jul 2025.
79
Lablogic Systems Inc.
$17,020
Rank history: not on the FY2021–FY2024 lists and #94 in FY2025; new, not ranked in Aug 2024–Jul 2025.
80
Nikon Metrology Inc
$16,500
Rank history: not on the FY2021–FY2024 lists and #95 in FY2025; up 17 since Aug 2024–Jul 2025.
81 $16,016
Rank history: not on the FY2021–FY2024 lists and #86 in FY2025; up 4 since Aug 2024–Jul 2025.
82 $13,800
Rank history: not on the FY2021–FY2025 lists; new, not ranked in Aug 2024–Jul 2025.
83 $13,532
Rank history: #20 in FY2021, #78 in FY2022, #13 in FY2023, #28 in FY2024 and #22 in FY2025; down 57 since Aug 2024–Jul 2025.
84 $13,464
Rank history: not on the FY2021–FY2023 lists, #84 in FY2024 and #99 in FY2025; down 10 since Aug 2024–Jul 2025.
85 $13,284
Rank history: not on the FY2021–FY2023 lists, #40 in FY2024 and #100 in FY2025; up 16 since Aug 2024–Jul 2025.
86
Sun Nuclear Corp.
$11,393
Rank history: not on the FY2021–FY2023 lists, #66 in FY2024 and #39 in FY2025; down 47 since Aug 2024–Jul 2025.
87
Henry Schein Practice Solutions Inc.
$11,128
Rank history: not on the FY2021–FY2025 lists; up 16 since Aug 2024–Jul 2025.
88 $10,436
Rank history: not on the FY2021–FY2022 lists, #37 in FY2023 and not on the FY2024–FY2025 lists; new, not ranked in Aug 2024–Jul 2025.
89 $10,351
Rank history: not on the FY2021–FY2025 lists; new, not ranked in Aug 2024–Jul 2025.
90
Autoclear LLC
$9,778
Rank history: not on the FY2021–FY2023 lists, #75 in FY2024 and not on the FY2025 list; new, not ranked in Aug 2024–Jul 2025.
91 $7,850
Rank history: not on the FY2021–FY2022 lists, #64 in FY2023, #52 in FY2024 and not on the FY2025 list; up 14 since Aug 2024–Jul 2025.
92
Mistral Inc
$7,435
Rank history: not on the FY2021–FY2025 lists; new, not ranked in Aug 2024–Jul 2025.
Show 67 more

92 of 95 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 $1.15 billion 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. An awardee whose own actions mostly name no parent, and that no other company's actions name as their parent, rolls up its SAM.gov registration's chain of parent companies: it counts under the first company there that other companies' actions name as their parent, or under the parent most of a company's own actions name, whichever comes first; with neither, under the highest company in the chain with federal contracts of its own. Joint ventures stay companies of their own. 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 Aug 2024–Jul 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 334517 contractors in Aug 2025–Jul 2026?

1. Siemens Corporation ($247M), 2. General Electric Company ($189M), 3. Koninklijke Philips N.V. ($169M), 4. Leidos Holdings, Inc. ($160M), 5. Rapiscan Systems Inc. ($97.2M), 6. Smiths Detection Inc. ($94.9M), 7. Astrophysics Inc. ($31.9M), 8. Westinghouse Electric Company LLC ($25.2M), 9. Hologic, Inc. ($21.9M), 10. Elekta Holdings U.S. Inc. ($19.2M).

On GovTribe

Research every contractor on this list

  • Every contract, task order and IDV they hold
  • Their subsidiaries, teammates and competitors
  • Open opportunities they're positioned for
  • Alerts when they win new work