Top 100 Contractors in PSC B533: Water Quality Studies, Jul 2025–Jun 2026

Name: Top 100 Contractors in PSC B533: Water Quality Studies, Jul 2025–Jun 2026
Creator: GovTribe

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

The top 10 won 43% of PSC B533 contract dollars from July 2025 through June 2026

Contract obligations: $9,769,356 Net of deobligations, by contracts coded PSC B533
Contractors: 125 Parent companies with an obligation
Largest contractor: Phigenics LLC $971 thousand, 8.7% of obligations
Data as of: Oct 14, 2026

Contract actions from FPDS (SAM.gov). How the rankings work · Download all 100 rows as CSV

Full ranking

Rank	Contractor	Net obligations	Share	Trend
1	Phigenics LLC Top agencies VA (Department of Veterans Affairs) DHA (Defense Health Agency)	$971,092	8.7%	Rank history: not on the FY2021–FY2023 lists, #9 in FY2024 and #1 in FY2025; up 5 since Jul 2024–Jun 2025.
2	Mabbett & Associates, Inc. Top agencies VA (Department of Veterans Affairs)	$903,416	8.1%	Rank history: #5 in FY2021, #6 in FY2022, #3 in FY2023, #5 in FY2024 and #3 in FY2025; up 3 since Jul 2024–Jun 2025.
3	Sanco Laboratories Inc. Top agencies VA (Department of Veterans Affairs)	$506,405	4.5%	Rank history: not on the FY2021–FY2022 lists, #12 in FY2023, #6 in FY2024 and #2 in FY2025; down 1 since Jul 2024–Jun 2025.
4	JPI Construction LLC Top agencies USDA (Department of Agriculture)	$432,560	3.9%	Rank history: not on the FY2021–FY2024 lists and #5 in FY2025; new, not ranked in Jul 2024–Jun 2025.
5	Optimum Environmental Corporation Top agencies DOI (Department of the Interior)	$391,864	3.5%	Rank history: not on the FY2021–FY2024 lists and #7 in FY2025; new, not ranked in Jul 2024–Jun 2025.
6	Fluid Solutions LLC Top agencies DOS (Department of State)	$388,543	3.5%	Rank history: not on the FY2021–FY2023 lists, #7 in FY2024 and #6 in FY2025; new, not ranked in Jul 2024–Jun 2025.
7	Water Management Services, Inc. Top agencies VA (Department of Veterans Affairs)	$306,540	2.7%	Rank history: not on the FY2021–FY2025 lists; new, not ranked in Jul 2024–Jun 2025.
8	RTI Laboratories Inc. Top agencies DHA (Defense Health Agency)	$295,000	2.6%	Rank history: not on the FY2021–FY2023 lists, #1 in FY2024 and #8 in FY2025; unchanged since Jul 2024–Jun 2025.
9	I-2-I Solutions, Inc. Top agencies Army (Department of the Army) DHA (Defense Health Agency) USDA (Department of Agriculture)	$291,712	2.6%	Rank history: not on the FY2021–FY2023 lists, #30 in FY2024 and #81 in FY2025; up 123 since Jul 2024–Jun 2025.
10	Winergy LLC Top agencies VA (Department of Veterans Affairs)	$285,965	2.5%	Rank history: not on the FY2021 list, #58 in FY2022, #78 in FY2023, #24 in FY2024 and #12 in FY2025; up 2 since Jul 2024–Jun 2025.
11	Utah State University Top agencies DOI (Department of the Interior)	$274,941	2.5%	Rank history: not on the FY2021–FY2023 lists, #13 in FY2024 and #11 in FY2025; up 2 since Jul 2024–Jun 2025.
12	Trustees of Indiana University Top agencies DOI (Department of the Interior)	$207,861	1.9%	Rank history: not on the FY2021–FY2023 lists, #20 in FY2024 and #14 in FY2025; up 8 since Jul 2024–Jun 2025.
13	Pace Analytical Services LLC Top agencies Army (Department of the Army) VA (Department of Veterans Affairs) DOI (Department of the Interior)	$200,381	1.8%	Rank history: #12 in FY2021, #27 in FY2022, #15 in FY2023, #19 in FY2024 and #9 in FY2025; down 4 since Jul 2024–Jun 2025.
14	Eurofins Drinking Water and Wastewater Central, LLC Top agencies DHA (Defense Health Agency)	$192,747	1.7%	Rank history: not on the FY2021–FY2025 lists; new, not ranked in Jul 2024–Jun 2025.
15	Pollen Environmental, Llc. Top agencies USAF (Department of the Air Force)	$187,648	1.7%	Rank history: not on the FY2021–FY2023 lists, #36 in FY2024 and #33 in FY2025; up 17 since Jul 2024–Jun 2025.
16	San Diego State University Foundation Top agencies Navy (Department of the Navy)	$186,745	1.7%	Rank history: not on the FY2021–FY2023 lists, #29 in FY2024 and #15 in FY2025; up 12 since Jul 2024–Jun 2025.
17	William W Walker JR Top agencies DOI (Department of the Interior)	$185,000	1.6%	Rank history: not on the FY2021–FY2022 lists, #14 in FY2023, #17 in FY2024 and #20 in FY2025; down 2 since Jul 2024–Jun 2025.
18	GD Resources, LLC Top agencies DOI (Department of the Interior)	$162,900	1.5%	Rank history: not on the FY2021–FY2024 lists and #19 in FY2025; down 1 since Jul 2024–Jun 2025.
19	Lab Leasing Co., Inc. Top agencies USDA (Department of Agriculture)	$148,599	1.3%	Rank history: not on the FY2021 list, #19 in FY2022, #24 in FY2023, #23 in FY2024 and #21 in FY2025; up 3 since Jul 2024–Jun 2025.
20	Envirosource Corp. Top agencies DOI (Department of the Interior)	$131,332	1.2%	Rank history: #16 in FY2021, #14 in FY2022, #25 in FY2023, not on the FY2024 list and #36 in FY2025; up 15 since Jul 2024–Jun 2025.
21	Business Resources of Long ISL Top agencies VA (Department of Veterans Affairs)	$129,743	1.2%	Rank history: not on the FY2021–FY2023 lists, #28 in FY2024 and #22 in FY2025; up 3 since Jul 2024–Jun 2025.
22	Florida International University Top agencies DOI (Department of the Interior)	$109,968	1.0%	Rank history: #45 in FY2021, not on the FY2022–FY2023 lists, #53 in FY2024 and #46 in FY2025; up 28 since Jul 2024–Jun 2025.
23	Environmental Quality Laboratories Inc. Top agencies Army (Department of the Army) DOI (Department of the Interior)	$107,177	1.0%	Rank history: #28 in FY2021, #26 in FY2022, #52 in FY2023, #26 in FY2024 and #26 in FY2025; up 7 since Jul 2024–Jun 2025.
24	Unlimited Support Services LLC Top agencies DOJ (Department of Justice)	$104,986	0.9%	Rank history: not on the FY2021–FY2022 lists, #95 in FY2023, #35 in FY2024 and #27 in FY2025; up 17 since Jul 2024–Jun 2025.
25	Ocean Systems Laboratory Inc. Top agencies DOI (Department of the Interior) Army (Department of the Army)	$102,676	0.9%	Rank history: #25 in FY2021, #24 in FY2022, #35 in FY2023, #41 in FY2024 and #29 in FY2025; new, not ranked in Jul 2024–Jun 2025.
26	Pure H2O Systems, LLC Top agencies DOT (Department of Transportation)	$102,000	0.9%	Rank history: not on the FY2021–FY2024 lists and #30 in FY2025; new, not ranked in Jul 2024–Jun 2025.
27	Cranmer Engineering, Inc. Top agencies Army (Department of the Army) DHA (Defense Health Agency) USDA (Department of Agriculture)	$93,888	0.8%	Rank history: not on the FY2021–FY2023 lists, #38 in FY2024 and #32 in FY2025; up 10 since Jul 2024–Jun 2025.
28	Vitisystems, Inc. Top agencies DHS (Department of Homeland Security)	$91,397	0.8%	Rank history: #58 in FY2021, not on the FY2022–FY2024 lists and #31 in FY2025; up 3 since Jul 2024–Jun 2025.
29	Babcock Laboratories, Inc. Top agencies DHA (Defense Health Agency)	$89,846	0.8%	Rank history: not on the FY2021 list, #42 in FY2022, #47 in FY2023, #56 in FY2024 and #53 in FY2025; up 23 since Jul 2024–Jun 2025.
30	Eurofins Environment Testing Northern California LLC Top agencies DOI (Department of the Interior)	$88,165	0.8%	Rank history: not on the FY2021–FY2024 lists and #34 in FY2025; new, not ranked in Jul 2024–Jun 2025.
31	County of Douglas Top agencies DOI (Department of the Interior)	$86,900	0.8%	Rank history: #14 in FY2021, #20 in FY2022, #36 in FY2023, #78 in FY2024 and #37 in FY2025; down 15 since Jul 2024–Jun 2025.
32	Matrix Sciences International Inc. Top agencies DOI (Department of the Interior)	$83,586	0.7%	Rank history: #32 in FY2021, #12 in FY2022, #23 in FY2023, #47 in FY2024 and #13 in FY2025; down 21 since Jul 2024–Jun 2025.
33	Benjamin L. Reimer Top agencies DOI (Department of the Interior)	$79,086	0.7%	Rank history: not on the FY2021–FY2024 lists and #56 in FY2025; new, not ranked in Jul 2024–Jun 2025.
34	Madelyne Bates Top agencies DOI (Department of the Interior)	$79,086	0.7%	Rank history: not on the FY2021–FY2024 lists and #57 in FY2025; new, not ranked in Jul 2024–Jun 2025.
35	Hydrotech Water Solutions LLC Top agencies VA (Department of Veterans Affairs)	$71,430	0.6%	Rank history: not on the FY2021–FY2023 lists, #66 in FY2024 and #35 in FY2025; down 1 since Jul 2024–Jun 2025.
36	Love's Backflow Testing and Repair Services, Inc. Top agencies USAF (Department of the Air Force)	$70,000	0.6%	Rank history: not on the FY2021–FY2024 lists and #66 in FY2025; up 27 since Jul 2024–Jun 2025.
37	Oregon State University Top agencies DOI (Department of the Interior)	$66,513	0.6%	Rank history: not on the FY2021–FY2023 lists, #57 in FY2024 and #40 in FY2025; down 4 since Jul 2024–Jun 2025.
38	Black & Gold Technology LLC Top agencies Army (Department of the Army)	$64,670	0.6%	Rank history: not on the FY2021–FY2024 lists and #42 in FY2025; new, not ranked in Jul 2024–Jun 2025.
39	Fruit Growers Laboratory, Inc. Top agencies USDA (Department of Agriculture) DOI (Department of the Interior) Army (Department of the Army)	$60,540	0.5%	Rank history: #40 in FY2021, not on the FY2022 list, #27 in FY2023, #34 in FY2024 and #63 in FY2025; up 14 since Jul 2024–Jun 2025.
40	Eurofins Analytics, LLC Top agencies DHA (Defense Health Agency)	$60,000	0.5%	Rank history: #67 in FY2021 and not on the FY2022–FY2025 lists; up 84 since Jul 2024–Jun 2025.
41	Mdk, LLC Top agencies DOI (Department of the Interior)	$59,593	0.5%	Rank history: #34 in FY2021, #22 in FY2022, #20 in FY2023, #21 in FY2024 and #18 in FY2025; down 27 since Jul 2024–Jun 2025.
42	HGS Engineering Inc. Top agencies VA (Department of Veterans Affairs)	$59,450	0.5%	Rank history: #8 in FY2021, #11 in FY2022, #16 in FY2023, not on the FY2024 list and #47 in FY2025; up 16 since Jul 2024–Jun 2025.
43	Analytical Services Corporation Top agencies DHA (Defense Health Agency)	$59,143	0.5%	Rank history: #49 in FY2021, #44 in FY2022, #42 in FY2023, #67 in FY2024 and #64 in FY2025; up 37 since Jul 2024–Jun 2025.
44	University of Utah Top agencies DOI (Department of the Interior)	$53,773	0.5%	Rank history: not on the FY2021–FY2024 lists and #48 in FY2025; new, not ranked in Jul 2024–Jun 2025.
45	Evapotranspiration Plus LLC Top agencies DOI (Department of the Interior)	$52,500	0.5%	Rank history: #23 in FY2021, not on the FY2022–FY2024 lists and #49 in FY2025; new, not ranked in Jul 2024–Jun 2025.
46	D & D Laboratory LLC Top agencies VA (Department of Veterans Affairs) DHA (Defense Health Agency)	$51,554	0.5%	Rank history: #52 in FY2021, #31 in FY2022, #37 in FY2023, #42 in FY2024 and #28 in FY2025; down 23 since Jul 2024–Jun 2025.
47	Adirondack Environmental Services, Inc. Top agencies DOI (Department of the Interior)	$50,000	0.4%	Rank history: not on the FY2021–FY2024 lists and #24 in FY2025; down 21 since Jul 2024–Jun 2025.
48	Environmental Chemists Inc. Top agencies Navy (Department of the Navy)	$49,955	0.4%	Rank history: not on the FY2021 list, #68 in FY2022, #38 in FY2023, #61 in FY2024 and #86 in FY2025; up 16 since Jul 2024–Jun 2025.
49	Sociedade De Empreitadas E Trabalhos Hidraulicos, S.A. Top agencies DHA (Defense Health Agency)	$49,303	0.4%	Rank history: not on the FY2021–FY2023 lists, #37 in FY2024 and #51 in FY2025; down 1 since Jul 2024–Jun 2025.
50	Isabella Winston Top agencies DOI (Department of the Interior)	$48,330	0.4%	Rank history: not on the FY2021–FY2025 lists; new, not ranked in Jul 2024–Jun 2025.
51	Tshimakain Creek Labs LLC Top agencies Army (Department of the Army)	$47,893	0.4%	Rank history: not on the FY2021–FY2023 lists, #44 in FY2024 and #44 in FY2025; down 8 since Jul 2024–Jun 2025.
52	Young's Water Services, LLC Top agencies USDA (Department of Agriculture)	$46,800	0.4%	Rank history: not on the FY2021–FY2024 lists and #74 in FY2025; new, not ranked in Jul 2024–Jun 2025.
53	Ecolab Inc. 2 awardees, including Nalco Company LLC and Barclay Water Management, Inc. Top agencies DOT (Department of Transportation)	$45,220	0.4%	Rank history: #46 in FY2021, not on the FY2022 list, #91 in FY2023, not on the FY2024 list and #17 in FY2025; down 35 since Jul 2024–Jun 2025.
54	Penelope Grace Diamond Top agencies DOI (Department of the Interior)	$44,981	0.4%	Rank history: not on the FY2021–FY2025 lists; new, not ranked in Jul 2024–Jun 2025.
55	Trichanalytics Inc. Top agencies DOI (Department of the Interior)	$41,022	0.4%	Rank history: not on the FY2021–FY2023 lists, #31 in FY2024 and #39 in FY2025; unchanged since Jul 2024–Jun 2025.
56	Zackary Althiser Top agencies DOI (Department of the Interior)	$38,906	0.3%	Rank history: not on the FY2021–FY2024 lists and #100 in FY2025; up 39 since Jul 2024–Jun 2025.
57	Ecolab Quimica LTDA Top agencies DOS (Department of State)	$36,443	0.3%	Rank history: not on the FY2021–FY2024 lists and #61 in FY2025; up 29 since Jul 2024–Jun 2025.
58	Eurofins Drinking Water and Wastewater West, LLC Top agencies DHA (Defense Health Agency) DOI (Department of the Interior)	$32,220	0.3%	Rank history: not on the FY2021–FY2023 lists, #10 in FY2024 and not on the FY2025 list; new, not ranked in Jul 2024–Jun 2025.
59	Davchem East Africa Limited Top agencies DOS (Department of State)	$29,747	0.3%	Rank history: not on the FY2021–FY2024 lists and #67 in FY2025; new, not ranked in Jul 2024–Jun 2025.
60	Chugai Technos Corporation Top agencies DHA (Defense Health Agency) Army (Department of the Army)	$28,673	0.3%	Rank history: not on the FY2021–FY2023 lists, #22 in FY2024 and #23 in FY2025; down 39 since Jul 2024–Jun 2025.
61	Triton Water LLC Top agencies HHS (Department of Health and Human Services)	$28,080	0.3%	Rank history: not on the FY2021–FY2023 lists, #71 in FY2024 and #68 in FY2025; up 4 since Jul 2024–Jun 2025.
62	Shadrach Ashton Top agencies DOI (Department of the Interior)	$27,982	0.2%	Rank history: not on the FY2021–FY2025 lists; new, not ranked in Jul 2024–Jun 2025.
63	Riverfront Safety & Health, LC Top agencies VA (Department of Veterans Affairs)	$26,623	0.2%	Rank history: not on the FY2021–FY2023 lists, #83 in FY2024 and #69 in FY2025; up 7 since Jul 2024–Jun 2025.
64	Evoqua Water Technologies LLC Top agencies VA (Department of Veterans Affairs)	$25,926	0.2%	Rank history: not on the FY2021–FY2025 lists; new, not ranked in Jul 2024–Jun 2025.
65	SGS North America Inc. Top agencies Treasury (Department of the Treasury)	$25,260	0.2%	Rank history: not on the FY2021–FY2024 lists and #85 in FY2025; up 8 since Jul 2024–Jun 2025.
66	Legend Technical Services of Arizona, Inc. Top agencies DHA (Defense Health Agency) IBWC (International Boundary and Water Commission U.S.-Mexico) DOI (Department of the Interior)	$25,213	0.2%	Rank history: #6 in FY2021, #10 in FY2022, #22 in FY2023, #14 in FY2024 and #71 in FY2025; up 10 since Jul 2024–Jun 2025.
67	Rhithron Associates Inc Top agencies DOI (Department of the Interior)	$24,750	0.2%	Rank history: not on the FY2021–FY2022 lists, #40 in FY2023, #68 in FY2024 and #72 in FY2025; down 6 since Jul 2024–Jun 2025.
68	Fluid Handling LLC Through Evoqua Water Technologies LLC Top agencies VA (Department of Veterans Affairs)	$24,692	0.2%	Rank history: not on the FY2021–FY2024 lists and #70 in FY2025; new, not ranked in Jul 2024–Jun 2025.
69	HAN Ping Huang & Associates, Inc. Top agencies DLA (Defense Logistics Agency) DHA (Defense Health Agency)	$21,387	0.2%	Rank history: #97 in FY2021, #89 in FY2022, not on the FY2023 list, #60 in FY2024 and #58 in FY2025; down 9 since Jul 2024–Jun 2025.
70	Admiralty Environmental, LLC Top agencies Commerce (Department of Commerce)	$20,790	0.2%	Rank history: #91 in FY2021, not on the FY2022–FY2023 lists, #77 in FY2024 and #76 in FY2025; down 2 since Jul 2024–Jun 2025.
71	Herrett Thomas A Top agencies DOI (Department of the Interior)	$19,997	0.2%	Rank history: #75 in FY2021, #74 in FY2022, #84 in FY2023, #82 in FY2024 and #83 in FY2025; unchanged since Jul 2024–Jun 2025.
72	Gilbride's Aqua Service, LLC Top agencies DOI (Department of the Interior)	$19,975	0.2%	Rank history: not on the FY2021 list, #87 in FY2022, #97 in FY2023, #97 in FY2024 and #91 in FY2025; up 13 since Jul 2024–Jun 2025.
73	ECO Analysts, LLC Top agencies DOI (Department of the Interior)	$19,725	0.2%	Rank history: not on the FY2021 list, #52 in FY2022, not on the FY2023–FY2024 lists and #60 in FY2025; up 27 since Jul 2024–Jun 2025.
74	Danaher Corporation Through Hach Company Top agencies DHA (Defense Health Agency)	$18,387	0.2%	Rank history: not on the FY2021–FY2023 lists, #94 in FY2024 and #90 in FY2025; down 15 since Jul 2024–Jun 2025.
75	DHL Analytical Inc. Top agencies DOI (Department of the Interior)	$18,252	0.2%	Rank history: not on the FY2021–FY2022 lists, #79 in FY2023, #62 in FY2024 and #75 in FY2025; down 8 since Jul 2024–Jun 2025.
76	Microbac Laboratories Inc. Top agencies USDA (Department of Agriculture)	$17,413	0.2%	Rank history: #64 in FY2021, not on the FY2022 list, #90 in FY2023, not on the FY2024 list and #89 in FY2025; up 2 since Jul 2024–Jun 2025.
77	Arc Environmental, LLC Top agencies Army (Department of the Army)	$17,011	0.2%	Rank history: #100 in FY2021, #97 in FY2022 and not on the FY2023–FY2025 lists; up 38 since Jul 2024–Jun 2025.
78	Environmental Science Corporation Top agencies Army (Department of the Army)	$15,421	0.1%	Rank history: #10 in FY2021, not on the FY2022 list, #51 in FY2023, #93 in FY2024 and #92 in FY2025; up 5 since Jul 2024–Jun 2025.
79	University of Maryland Center for Environmental Science Top agencies DOI (Department of the Interior)	$15,133	0.1%	Rank history: not on the FY2021–FY2025 lists; up 2 since Jul 2024–Jun 2025.
80	Eurofins Environment Testing Northwest, LLC Top agencies USDA (Department of Agriculture)	$15,104	0.1%	Rank history: not on the FY2021–FY2023 lists, #91 in FY2024 and #97 in FY2025; up 12 since Jul 2024–Jun 2025.
81	Division of Agriculture of the University of Arkansas Top agencies USDA (Department of Agriculture)	$15,065	0.1%	Rank history: not on the FY2021–FY2024 lists and #59 in FY2025; down 24 since Jul 2024–Jun 2025.
82	KIM R Albers Top agencies DOJ (Department of Justice)	$15,000	0.1%	Rank history: #94 in FY2021, #94 in FY2022, not on the FY2023 list, #86 in FY2024 and not on the FY2025 list; up 14 since Jul 2024–Jun 2025.
83	Global Water Technology, Inc. Top agencies DOJ (Department of Justice)	$15,000	0.1%	Rank history: #92 in FY2021, #92 in FY2022 and not on the FY2023–FY2025 lists; new, not ranked in Jul 2024–Jun 2025.
84	Anatek Labs Inc. Top agencies DOI (Department of the Interior)	$14,835	0.1%	Rank history: not on the FY2021–FY2024 lists and #80 in FY2025; up 38 since Jul 2024–Jun 2025.
85	Christian Pizana Rivas Top agencies DOI (Department of the Interior)	$14,500	0.1%	Rank history: not on the FY2021–FY2024 lists and #82 in FY2025; down 6 since Jul 2024–Jun 2025.
86	Spring Street Analytical LLC Top agencies USDA (Department of Agriculture)	$13,750	0.1%	Rank history: not on the FY2021 list, #83 in FY2022, not on the FY2023 list, #81 in FY2024 and not on the FY2025 list; up 11 since Jul 2024–Jun 2025.
87	CT Laboratories, LLC Top agencies DOI (Department of the Interior)	$12,828	0.1%	Rank history: not on the FY2021–FY2022 lists, #98 in FY2023, not on the FY2024 list and #95 in FY2025; up 2 since Jul 2024–Jun 2025.
88	Vastglobe Logistics LLC Top agencies DOI (Department of the Interior)	$12,740	0.1%	Rank history: not on the FY2021–FY2025 lists; new, not ranked in Jul 2024–Jun 2025.
89	Normandeau Associates, Inc. Top agencies DOI (Department of the Interior)	$12,000	0.1%	Rank history: not on the FY2021–FY2024 lists and #79 in FY2025; up 15 since Jul 2024–Jun 2025.
90	Brooks Applied Labs LLC Top agencies Army (Department of the Army)	$11,515	0.1%	Rank history: not on the FY2021–FY2025 lists; new, not ranked in Jul 2024–Jun 2025.
91	Eurofins EAG Agroscience LLC Through Eurofins Environment Testing South Central, LLC Top agencies USAF (Department of the Air Force)	$10,290	0.1%	Rank history: not on the FY2021–FY2025 lists; new, not ranked in Jul 2024–Jun 2025.
92	Goldstream Engineering, Inc. Top agencies USDA (Department of Agriculture)	$10,200	0.1%	Rank history: not on the FY2021–FY2025 lists; down 1 since Jul 2024–Jun 2025.
93	North Carolina State University Top agencies USDA (Department of Agriculture)	$9,633	0.1%	Rank history: not on the FY2021–FY2025 lists; new, not ranked in Jul 2024–Jun 2025.
94	Enviro-Chem, Inc. Top agencies VA (Department of Veterans Affairs)	$9,000	0.1%	Rank history: not on the FY2021–FY2025 lists; new, not ranked in Jul 2024–Jun 2025.
95	The Converse Professional Group Top agencies VA (Department of Veterans Affairs)	$8,720	0.1%	Rank history: not on the FY2021–FY2025 lists; up 12 since Jul 2024–Jun 2025.
96	University of Illinois Top agencies Army (Department of the Army)	$8,429	0.1%	Rank history: not on the FY2021–FY2025 lists; new, not ranked in Jul 2024–Jun 2025.
97	Dellavalle Laboratory, Inc. Top agencies HHS (Department of Health and Human Services)	$8,226	0.1%	Rank history: not on the FY2021–FY2024 lists and #94 in FY2025; down 9 since Jul 2024–Jun 2025.
98	Davy Engineering Company, Inc. Top agencies DOI (Department of the Interior)	$8,137	0.1%	Rank history: not on the FY2021–FY2025 lists; up 13 since Jul 2024–Jun 2025.
99	Lukas Jones Top agencies DOI (Department of the Interior)	$7,752	0.1%	Rank history: not on the FY2021–FY2025 lists; new, not ranked in Jul 2024–Jun 2025.
100	Drew Jackson Top agencies DOI (Department of the Interior)	$7,752	0.1%	Rank history: not on the FY2021–FY2025 lists; new, not ranked in Jul 2024–Jun 2025.

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100 of 125 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 $11.2 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 PSC B533 contractors in Jul 2025–Jun 2026?

1. Phigenics LLC ($971K), 2. Mabbett & Associates, Inc. ($903K), 3. Sanco Laboratories Inc. ($506K), 4. JPI Construction LLC ($433K), 5. Optimum Environmental Corporation ($392K), 6. Fluid Solutions LLC ($389K), 7. Water Management Services, Inc. ($307K), 8. RTI Laboratories Inc. ($295K), 9. I-2-I Solutions, Inc. ($292K), 10. Winergy LLC ($286K).

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