Corporate Office Properties, L.p. 401(k) Plan: Login, Facts & Contact Information

Corporate Office Properties, L.p. 401(k) Plan Facts

Plan name
COPT DEFENSE PROPERTIES, LP EMPLOYEE RETIREMENT SAVINGS PLAN
Plan type
401(k) with employer contributions and profit sharing
Plan sponsor
COPT DEFENSE PROPERTIES, LP
Participants
568 (423 active employees)
Former employees with a balance
147
Plan assets
$108,686,089 at Dec 31, 2024
Average account balance
$191,349 across 568 accounts
Employer contributions
$2,061,282 in plan year 2024 (23% of all contributions)
Recordkeeper
T Rowe Price Rps Inc
Plan year
Jan 1, 2024 – Dec 31, 2024
Plan established
Oct 1, 1998
✓ Employer contributions✓ Automatic enrollment✓ Default investment for undecided participants✓ Participants choose their own investments✓ Self-directed brokerage window✓ Profit sharing— Company stock (ESOP)

Source: Form 5500 for plan year 2024 (Jan 1, 2024 – Dec 31, 2024), filed Oct 6, 2025. Public filing with the U.S. Department of Labor.

Money in and out in plan year 2024

  • $8.92 million went into the plan in contributions, $2.06 million of it from the employer (23%).
  • $11.7 million was paid out to participants.
  • Investment and other income added $12.8 million.
  • Administrative expenses were $57,993, about $102 per account.

How the Corporate Office Properties, L.p. 401(k) changed, 2019–2024

Plan yearParticipantsPlan assetsEmployer contributionsBenefits paid
2019591$70.2 million$1.56 million$5.21 million
2020627$86.0 million$1.71 million$3.82 million
2021660$98.7 million$1.77 million$6.01 million
2022677$82.4 million$1.73 million$3.85 million
2023621$98.7 million$1.84 million$6.99 million
2024568$108.7 million$2.06 million$11.7 million

Corporate Office Properties, L.p. 401(k) Contact Information

Phone
443-285-5500
Mailing address
6711 COLUMBIA GATEWAY DR, SUITE 300, COLUMBIA MD 21046
Plan sponsor
COPT DEFENSE PROPERTIES, LP
Employer identification number (EIN)
23-2930022
Plan number
001

Questions about the Corporate Office Properties, L.p. 401(k)

Does Corporate Office Properties, L.p contribute to the 401(k)?

Yes. The plan reports an employer contribution arrangement. In plan year 2024 the employer contributed $2.06 million, 23% of all contributions.

Does the Corporate Office Properties, L.p 401(k) have automatic enrollment?

Yes. The plan reports automatic enrollment of eligible employees.

How many people are in the Corporate Office Properties, L.p 401(k) plan?

568 participants at the start of plan year 2024, 423 of them active employees, and 147 former employees who still had money in the plan.

What is the average 401(k) balance at Corporate Office Properties, L.p?

About $191,349 per account: $108.7 million in plan assets across 568 accounts with a balance at the end of plan year 2024.

Who manages the Corporate Office Properties, L.p 401(k) accounts?

T. Rowe Price (listed on the filing as T ROWE PRICE RPS INC) is the plan's recordkeeper, which is where participants log in to see their balance.

I no longer work at Corporate Office Properties, L.p. How do I access my 401(k)?

Your account stays with T. Rowe Price after you leave, so you can log in with the same credentials. If your balance was small, the plan may have rolled it into an IRA in your name. If you can't find it, Beagle can locate it for you.

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