Rambus Inc. 401(k) Plan: Login, Facts & Contact Information

Rambus Inc. 401(k) Plan Facts

Plan name
RAMBUS INC. 401(K) PLAN
Plan type
401(k) with employer contributions
Plan sponsor
RAMBUS, INC.
Participants
609 (339 active employees)
Former employees with a balance
313
Plan assets
$179,460,076 at Dec 31, 2024
Average account balance
$292,280 across 614 accounts
Employer contributions
$2,033,799 in plan year 2024 (18% of all contributions)
Recordkeeper
Fidelity Investments Institutional
Plan year
Jan 1, 2024 – Dec 31, 2024
Plan established
Jan 1, 1991
✓ 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 Sep 19, 2025. Public filing with the U.S. Department of Labor.

Money in and out in plan year 2024

  • $11.4 million went into the plan in contributions, $2.03 million of it from the employer (18%).
  • $24.3 million was paid out to participants.
  • Investment and other income added $28.3 million.
  • Administrative expenses were $60,156, about $98 per account.

How the Rambus Inc. 401(k) changed, 2019–2024

Plan yearParticipantsPlan assetsEmployer contributionsBenefits paid
2019651$139.7 million$2.03 million$9.26 million
2020643$159.4 million$1.86 million$13.5 million
2021635$174.8 million$1.79 million$20.8 million
2022624$139.1 million$1.99 million$11.5 million
2023627$164.1 million$2.00 million$14.6 million
2024609$179.5 million$2.03 million$24.3 million

Rambus Inc. 401(k) Contact Information

Phone
408-462-8000
Mailing address
4453 N 1ST STREET UNIT 100, SAN JOSE CA 95134
Plan sponsor
RAMBUS, INC.
Employer identification number (EIN)
94-3112828
Plan number
001

Questions about the Rambus Inc. 401(k)

Does Rambus Inc contribute to the 401(k)?

Yes. The plan reports an employer contribution arrangement. In plan year 2024 the employer contributed $2.03 million, 18% of all contributions.

Does the Rambus Inc 401(k) have automatic enrollment?

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

How many people are in the Rambus Inc 401(k) plan?

609 participants at the start of plan year 2024, 339 of them active employees, and 313 former employees who still had money in the plan.

What is the average 401(k) balance at Rambus Inc?

About $292,280 per account: $179.5 million in plan assets across 614 accounts with a balance at the end of plan year 2024.

Who manages the Rambus Inc 401(k) accounts?

Fidelity NetBenefits (listed on the filing as FIDELITY INVESTMENTS INSTITUTIONAL) is the plan's recordkeeper, which is where participants log in to see their balance.

I no longer work at Rambus Inc. How do I access my 401(k)?

Your account stays with Fidelity NetBenefits 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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