Mantech International 401(k) and retirement plans

Mantech International Corporation, Herndon, VA. EIN 22-1852179. Annual reports 2009–2024.

Mantech International Corporation has one active retirement plan on file, the Mantech International 401(k) Plan, with 15,135 participants and $1.7 billion in assets in 2024. Fidelity has been its recordkeeper since 2009. No traditional pension plan appears in Mantech International's filings since 2009.

Active plans: 1
Participants: 15,135
Plan assets: $1.7 billion
401(k) recordkeeper: Fidelity
Plans on file: 2
Industry: Professional services

All 2 plans

Active plans first

Mantech International 401(k) Plan

401(k)Active

Active. The plan filed its annual report for the 2024 plan year.

Plan number: 002Employer EIN 22-1852179
Participants (2024): 15,135
Net assets (2024): $1.7 billion
Recordkeeper: Fidelity2009–2024
Plan administrator: Mantech International Corporation
2251 Corporate Park Drive
Herndon, VA 20171
(703) 218-6000As filed for 2024
In effect since: June 1, 1978

Year by year, 2009 to 2024

Plan year	Participants	Net assets	Recordkeeper
2024	15,135	$1.7 billion	Fidelity
2023	15,538	$1.5 billion	Fidelity
2022	15,983	$1.3 billion	Fidelity
2021	17,073	$1.5 billion	Fidelity
2020	14,286	$1.3 billion	Fidelity
2019	13,877	$1.0 billion	Fidelity
2018	12,313	$840 million	Fidelity
2017	11,820	$895 million	Fidelity
2016	11,292	$760 million	Fidelity
2015	11,333	$734 million	Fidelity
2014	12,717	$748 million	Fidelity
2013	13,409	$711 million	Fidelity
2012	14,800	$607 million	Fidelity
2011	14,338	$526 million	Fidelity
2010	13,412	$505 million	Fidelity
2009	10,810	$413 million	Fidelity

Mantech International Corporation Employee Stock Ownership Plan

Employee stock ownership plan (ESOP)Closed

Closed. The plan filed its final annual report for 2023, which means its assets were paid out or moved and it no longer exists.

Plan number: 001Employer EIN 22-1852179
Participants (2022): 383
Net assets (2022): $4.7 million
Recordkeeper: Fidelity2012–2023
Plan administrator: Mantech International Corporation
2251 Corporate Park Drive
Herndon, VA 20171
(703) 218-6000As filed for 2023
In effect since: January 1, 2000

Year by year, 2009 to 2023

Plan year	Participants	Net assets	Recordkeeper
2023	0	$0	Fidelity
2022	383	$4.7 million	not listed
2021	3,535	$17.9 million	Fidelity
2020	4,758	$23.4 million	Fidelity
2019	6,461	$22.8 million	Fidelity
2018	6,883	$16.1 million	Fidelity
2017	8,519	$16.8 million	Fidelity
2016	8,627	$16.3 million	Fidelity
2015	8,323	$13.5 million	Fidelity
2014	8,783	$17.4 million	Fidelity
2013	9,986	$19.5 million	Fidelity
2012	10,818	$18.3 million	Fidelity
2011	10,205	$19.4 million	not listed
2010	9,305	$24.4 million	not listed
2009	8,376	$28.5 million	not listed

If you had money in one of these plans

Call Fidelity (fidelity.com), which runs the Mantech International 401(k) Plan. With your Social Security number and the plan name, it can tell you whether you still have a balance and, if not, where it went.
Or call the plan administrator listed on the plan below ((703) 218-6000). That number was filed for 2024; ask for the benefits or retirement plan office.
If your plan closed, unclaimed balances usually went to an IRA in your name, to the PBGC's missing participants program, or to state unclaimed property. Here is how to check each one.
Still stuck? The Department of Labor's benefits advisers help for free: askebsa.dol.gov or 1-866-444-3272. Never pay anyone to find your own money.

What these numbers are

They come from the Form 5500 annual reports each plan files with the Department of Labor, as the plan filed them. A plan year is usually a calendar year.
Participants counts everyone in the plan at year end: current employees, former employees who still have a balance or a pension coming, and retirees or beneficiaries being paid.
The recordkeeper is the service provider whose Schedule C entry says it keeps the plan's records. Small plans do not file Schedule C, so some plans show none.
We cannot see anyone's account. Only the plan or its recordkeeper can tell you your balance.

Sources: U.S. Department of Labor, Form 5500 datasets and PBGC trusteed plans. How we read them.

All 2 plans

Mantech International 401(k) Plan

Mantech International Corporation Employee Stock Ownership Plan

If you had money in one of these plans

What these numbers are

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