Board Of Trustees Of Supplemental Income Trust Fund 401(k) Plan: Login, Facts & Contact Information

Board Of Trustees Of Supplemental Income Trust Fund 401(k) Plan Facts

Plan name
SUPPLEMENTAL INCOME 401(K) PLAN
Plan type
401(k) and profit sharing
Plan sponsor
BOARD OF TRUSTEES OF SUPPLEMENTAL INCOME TRUST FUND
Participants
39,517 (34,085 active employees)
Former employees with a balance
6,503
Plan assets
$1,866,171,955 at Dec 31, 2024
Average account balance
$45,686 across 40,848 accounts
Employer contributions
$36,438,232 in plan year 2024 (26% of all contributions)
Recordkeeper
John Hancock Retirement Pl Services
Plan year
Jan 1, 2024 – Dec 31, 2024
Plan established
Jan 1, 1995
— 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 14, 2025. Public filing with the U.S. Department of Labor.

Money in and out in plan year 2024

  • $143.1 million went into the plan in contributions, $36.4 million of it from the employer (26%).
  • $143.3 million was paid out to participants.
  • Investment and other income added $212.2 million.
  • Administrative expenses were $6.93 million, about $170 per account.

How the Board Of Trustees Of Supplemental Income Trust Fund 401(k) changed, 2019–2024

Plan yearParticipantsPlan assetsEmployer contributionsBenefits paid
201929,648$1.23 billion$25.9 million$83.6 million
202031,125$1.37 billion$32.0 million$141.7 million
202134,449$1.67 billion$34.1 million$119.7 million
202235,415$1.42 billion$36.3 million$119.8 million
202336,861$1.66 billion$35.6 million$128.2 million
202439,517$1.87 billion$36.4 million$143.3 million

Board Of Trustees Of Supplemental Income Trust Fund 401(k) Contact Information

Phone
800-477-3829
Mailing address
420 VIRGINIA ST, SUITE 2-A, VALLEJO CA 945906018
Plan sponsor
BOARD OF TRUSTEES OF SUPPLEMENTAL INCOME TRUST FUND
Employer identification number (EIN)
94-2554388
Plan number
002

Questions about the Board Of Trustees Of Supplemental Income Trust Fund 401(k)

Does Board Of Trustees Of Supplemental Income Trust Fund contribute to the 401(k)?

The plan does not report an employer matching arrangement on its Form 5500. It did report $36.4 million in employer contributions for plan year 2024.

Does the Board Of Trustees Of Supplemental Income Trust Fund 401(k) have automatic enrollment?

No. The plan does not report automatic enrollment; employees enroll themselves.

How many people are in the Board Of Trustees Of Supplemental Income Trust Fund 401(k) plan?

39,517 participants at the start of plan year 2024, 34,085 of them active employees, and 6,503 former employees who still had money in the plan.

What is the average 401(k) balance at Board Of Trustees Of Supplemental Income Trust Fund?

About $45,686 per account: $1.87 billion in plan assets across 40,848 accounts with a balance at the end of plan year 2024.

Who manages the Board Of Trustees Of Supplemental Income Trust Fund 401(k) accounts?

John Hancock (listed on the filing as JOHN HANCOCK RETIREMENT PL SERVICES) is the plan's recordkeeper, which is where participants log in to see their balance.

I no longer work at Board Of Trustees Of Supplemental Income Trust Fund. How do I access my 401(k)?

Your account stays with John Hancock 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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