Top 32 Contractors in PSC B528: Regulatory Studies, FY2021

Full ranking

Rank	Contractor	Net obligations	Share	Trend
1	ICF International, Inc. Through ICF Incorporated, L.L.C. Top agencies EPA (Environmental Protection Agency) NRC (Nuclear Regulatory Commission) DHS (Department of Homeland Security)	$11,854,848	31.3%	Rank history: #1 in FY2022, #1 in FY2023 and #3 in FY2024; up 2 since FY2020.
2	Deloitte LLP Through Deloitte Consulting LLP Top agencies HHS (Department of Health and Human Services)	$3,673,020	9.7%	Rank history: #2 in FY2022, #2 in FY2023 and not on the FY2024 list; new, not ranked in FY2020.
3	General Dynamics Corporation 2 awardees, including General Dynamics Information Technology Inc. Top agencies EPA (Environmental Protection Agency)	$3,226,802	8.5%	Rank history: #17 in FY2022 and not on the FY2023–FY2024 lists; up 4 since FY2020.
4	Lewis & Ellis, LLC Top agencies HHS (Department of Health and Human Services)	$2,911,877	7.7%	Rank history: #3 in FY2022 and not on the FY2023–FY2024 lists; up 4 since FY2020.
5	Guidehouse Inc. 2 awardees Top agencies HHS (Department of Health and Human Services)	$2,065,600	5.5%	Rank history: #4 in FY2022 and not on the FY2023–FY2024 lists; up 15 since FY2020.
6	Eastern Research Group Inc. Top agencies EPA (Environmental Protection Agency) DOL (Department of Labor)	$1,608,997	4.3%	Rank history: #5 in FY2022, #23 in FY2023 and not on the FY2024 list; down 2 since FY2020.
7	Korn / Ferry International Through Sensa Solutions, Inc. Top agencies HHS (Department of Health and Human Services)	$1,311,774	3.5%	Rank history: #9 in FY2022, #6 in FY2023 and not on the FY2024 list; new, not ranked in FY2020.
8	R & K Enterprise Solutions Inc. Top agencies DHS (Department of Homeland Security) DOT (Department of Transportation)	$1,242,073	3.3%	Rank history: #8 in FY2022 and not on the FY2023–FY2024 lists; up 4 since FY2020.
9	Richard H Sweetman IV Top agencies HHS (Department of Health and Human Services)	$1,071,499	2.8%	Rank history: #12 in FY2022, #9 in FY2023 and #7 in FY2024; up 4 since FY2020.
10	Susquehanna Actuarial Consulting, Inc. Top agencies HHS (Department of Health and Human Services)	$1,005,530	2.7%	Rank history: #14 in FY2022, #10 in FY2023 and #8 in FY2024; up 5 since FY2020.
11	Actuarial Research Corporation Top agencies HHS (Department of Health and Human Services)	$998,911	2.6%	Rank history: #15 in FY2022, #12 in FY2023 and #12 in FY2024; up 3 since FY2020.
12	Bolton Partners, Inc. Top agencies HHS (Department of Health and Human Services)	$970,298	2.6%	Rank history: not on the FY2022–FY2024 lists; up 4 since FY2020.
13	S C & A Inc. Top agencies EPA (Environmental Protection Agency)	$961,227	2.5%	Rank history: #16 in FY2022, #15 in FY2023 and #10 in FY2024; new, not ranked in FY2020.
14	Oil Price Information Service LLC Through R.l. Polk & Co Top agencies DOT (Department of Transportation)	$486,500	1.3%	Rank history: not on the FY2022–FY2024 lists; new, not ranked in FY2020.
15	The Potomac Institute for Policy Studies Top agencies DMEA (Defense Microelectronics Activity)	$448,903	1.2%	Rank history: not on the FY2022–FY2024 lists; new, not ranked in FY2020.
16	Bluestone Logic, LLC Top agencies DISA (Defense Information Systems Agency)	$265,891	0.7%	Rank history: #7 in FY2022, #7 in FY2023 and #4 in FY2024; new, not ranked in FY2020.
17	Diane Skipworth Top agencies DHS (Department of Homeland Security)	$240,900	0.6%	Rank history: #20 in FY2022, #21 in FY2023 and #23 in FY2024; up 7 since FY2020.
18	Endyna, Inc. Top agencies EPA (Environmental Protection Agency)	$149,717	0.4%	Rank history: #22 in FY2022, #24 in FY2023 and #25 in FY2024; up 5 since FY2020.
19	Environmental Management & Planning Solutions LLC Top agencies DOI (Department of the Interior)	$106,045	0.3%	Rank history: not on the FY2022–FY2024 lists; new, not ranked in FY2020.
20	Walter A Dortch Top agencies USDA (Department of Agriculture)	$99,990	0.3%	Rank history: not on the FY2022–FY2024 lists; new, not ranked in FY2020.
21	B-Bis LLC Top agencies HHS (Department of Health and Human Services)	$99,606	0.3%	Rank history: not on the FY2022–FY2024 lists; new, not ranked in FY2020.
22	Safety Management Services Inc. Top agencies Army (Department of the Army)	$97,950	0.3%	Rank history: #23 in FY2022, #26 in FY2023 and not on the FY2024 list; up 4 since FY2020.
23	Southwest Research Institute Top agencies NRC (Nuclear Regulatory Commission)	$92,453	0.2%	Rank history: not on the FY2022–FY2024 lists; up 6 since FY2020.
24	The Cruzan Group Llc Top agencies DOI (Department of the Interior)	$82,910	0.2%	Rank history: not on the FY2022–FY2024 lists; new, not ranked in FY2020.
25	Horsley Witten Group, Inc. Top agencies EPA (Environmental Protection Agency)	$79,611	0.2%	Rank history: #21 in FY2022, #29 in FY2023 and not on the FY2024 list; down 8 since FY2020.
26	Mecx, Inc. Top agencies VA (Department of Veterans Affairs)	$24,197	0.1%	Rank history: not on the FY2022–FY2024 lists; new, not ranked in FY2020.
27	R2T, Inc. Top agencies USAF (Department of the Air Force)	$24,165	0.1%	Rank history: not on the FY2022–FY2024 lists; up 5 since FY2020.
28	ICF Incorporated, L.L.C. Top agencies EPA (Environmental Protection Agency)	$20,000	0.1%	Rank history: not on the FY2022–FY2024 lists; down 27 since FY2020.
29	Research Triangle Institute Top agencies HHS (Department of Health and Human Services)	$16,771	<0.1%	Rank history: #6 in FY2022, #4 in FY2023 and #17 in FY2024; down 27 since FY2020.
30	Samantha M Constant Top agencies Smithsonian (Smithsonian Institution)	$16,250	<0.1%	Rank history: not on the FY2022–FY2024 lists; new, not ranked in FY2020.
31	ABT Global LLC Top agencies DOT (Department of Transportation)	$15,000	<0.1%	Rank history: not on the FY2022–FY2024 lists; new, not ranked in FY2020.
32	Ambiente S.P.A. Top agencies Army (Department of the Army)	$12,932	<0.1%	Rank history: not on the FY2022–FY2024 lists; up 1 since FY2020.

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 $37.9 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 2021 ran Oct 1, 2020 – Sep 30, 2021. 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 FY2020. "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 FY2020 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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