Top 25 Contractors in PSC B528: Regulatory Studies, FY2024

Full ranking

Rank	Contractor	Net obligations	Share	Trend
1	Deloitte Through Deloitte Consulting LLP Top agencies HHS (Department of Health and Human Services)	$5,414,236	19.6%	Rank history: not on the FY2021–FY2023 lists; new.
2	Lewis & Ellis Inc. Top agencies HHS (Department of Health and Human Services)	$3,526,026	12.8%	Rank history: not on the FY2021–FY2022 lists and #3 in FY2023; up 1 since FY2023.
3	ICF International, Inc. Through ICF Incorporated, L.L.C. Top agencies EPA (Environmental Protection Agency)	$3,198,308	11.6%	Rank history: #1 in FY2021, #1 in FY2022 and #1 in FY2023; down 2 since FY2023.
4	Bluestone Logic LLC Top agencies DISA (Defense Information Systems Agency)	$2,108,159	7.6%	Rank history: #16 in FY2021, #7 in FY2022 and #7 in FY2023; up 3 since FY2023.
5	Sensa Solutions, Inc. Top agencies HHS (Department of Health and Human Services)	$1,529,141	5.5%	Rank history: not on the FY2021–FY2023 lists; new.
6	Defined Business Solutions LLC Top agencies DMEA (Defense Microelectronics Activity)	$1,214,454	4.4%	Rank history: not on the FY2021 list, #11 in FY2022 and #8 in FY2023; up 2 since FY2023.
7	Richard H Sweetman IV Top agencies HHS (Department of Health and Human Services)	$1,144,300	4.1%	Rank history: #9 in FY2021, #12 in FY2022 and #9 in FY2023; up 2 since FY2023.
8	Susquehanna Actuarial Consulting, Inc. Top agencies HHS (Department of Health and Human Services)	$1,113,048	4.0%	Rank history: #10 in FY2021, #14 in FY2022 and #10 in FY2023; up 2 since FY2023.
9	Bolton Health Actuarial, Inc. Top agencies HHS (Department of Health and Human Services)	$1,100,091	4.0%	Rank history: not on the FY2021 list, #13 in FY2022 and #11 in FY2023; up 2 since FY2023.
10	S C & A Inc. Top agencies EPA (Environmental Protection Agency) NRC (Nuclear Regulatory Commission)	$1,065,500	3.9%	Rank history: #13 in FY2021, #16 in FY2022 and #15 in FY2023; up 5 since FY2023.
11	Industrial Economics Inc. Top agencies DHS (Department of Homeland Security) EPA (Environmental Protection Agency)	$1,021,289	3.7%	Rank history: not on the FY2021 list, #18 in FY2022 and #13 in FY2023; up 2 since FY2023.
12	Actuarial Research Corporation Top agencies HHS (Department of Health and Human Services)	$933,092	3.4%	Rank history: #11 in FY2021, #15 in FY2022 and #12 in FY2023; unchanged since FY2023.
13	R & K Enterprise Solutions, Inc. Top agencies DHS (Department of Homeland Security)	$626,253	2.3%	Rank history: not on the FY2021–FY2023 lists; new.
14	Novarest Inc. Top agencies HHS (Department of Health and Human Services)	$578,666	2.1%	Rank history: not on the FY2021–FY2022 lists and #16 in FY2023; up 2 since FY2023.
15	EGJ Health Consulting LLC Top agencies HHS (Department of Health and Human Services)	$544,068	2.0%	Rank history: not on the FY2021–FY2022 lists and #17 in FY2023; up 2 since FY2023.
16	Specpro Sustainment and Environmental, LLC Top agencies Navy (Department of the Navy)	$398,138	1.4%	Rank history: not on the FY2021 list, #19 in FY2022 and #20 in FY2023; up 4 since FY2023.
17	Research Triangle Institute Top agencies EPA (Environmental Protection Agency)	$299,200	1.1%	Rank history: #29 in FY2021, #6 in FY2022 and #4 in FY2023; down 13 since FY2023.
18	International Research Ethics Consultation - Innehaver Reidar Lie Top agencies HHS (Department of Health and Human Services)	$100,000	0.4%	Rank history: not on the FY2021–FY2022 lists and #25 in FY2023; up 7 since FY2023.
19	Vernadero Group Inc. Top agencies DOI (Department of the Interior)	$79,935	0.3%	Rank history: not on the FY2021–FY2023 lists; new.
20	Facility Dynamics Engineering Corporation Top agencies Army (Department of the Army)	$51,076	0.2%	Rank history: not on the FY2021–FY2023 lists; new.
21	American National Standards Institute Incorporated Top agencies HHS (Department of Health and Human Services)	$35,000	0.1%	Rank history: not on the FY2021 list, #29 in FY2022 and #28 in FY2023; up 7 since FY2023.
22	IHE International, Inc. Top agencies HHS (Department of Health and Human Services)	$33,333	0.1%	Rank history: not on the FY2021–FY2023 lists; new.
23	Diane Skipworth Top agencies DHS (Department of Homeland Security)	$32,000	0.1%	Rank history: #17 in FY2021, #20 in FY2022 and #21 in FY2023; down 2 since FY2023.
24	Tetra Tech, Inc. Top agencies Navy (Department of the Navy)	$17,958	0.1%	Rank history: not on the FY2021–FY2023 lists; new.
25	Endyna, Inc. Top agencies EPA (Environmental Protection Agency)	$3,591	<0.1%	Rank history: #18 in FY2021, #22 in FY2022 and #24 in FY2023; down 1 since FY2023.

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 $27.6 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.
• Fiscal year 2024 ran Oct 1, 2023 – Sep 30, 2024. The Department of Defense reports its contract actions to FPDS about 90 days late, so a fiscal year is ranked once they're in, in February, and the list doesn't change after.
• Rank changes compare with FY2023. "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. The step from FY2023 takes the color of the rank change beside it.
• Placeholder recipients FPDS uses when it names no company ("Miscellaneous Foreign Contractors" and the like) aren't ranked.

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