Find an old Trillium Management 401(k)

Who to contact about an account in the Trillium Management plan, from the filings. Free, no sign-up, no Social Security number.

Trillium 401(k) Plan

Trillium Management, LLC · Plan 001 · EIN 46-2344130 · New York, NY

Active · plan year 2025 filing401(k)
Plan administratorTrillium Management, LLC
417 5th Avenue, 6th Floor, New York, NY 10016
Form 5500 ↗
Recordkeeper (who holds the accounts)The Vanguard Group, Inc.Schedule C ↗
Former employees with balances145 separated participants still had money in the planForm 5500 ↗

Trillium Management 401(k) match, vesting and fees →

Found it? Your options

Leave itOften allowed if your balance is over $7,000. You keep the plan's investments and fees.
Move it to your new job's planIf the new plan accepts roll-ins. Ask the new plan's recordkeeper.
Roll it into an IRAMore investment choices, and you control it. A direct rollover avoids withholding and penalties.
Cash outUsually taxed, plus a 10% penalty if you are under 59½.

General information, not financial or tax advice. Rules depend on your plan and situation.

How to track down the account

  1. Call the plan administrator or recordkeeper listed on the filing. Have your name, Social Security number and dates of employment ready.
  2. If the plan terminated, ask the administrator where balances went (another plan, an IRA provider, or a state unclaimed-property office).
  3. Over 65? Also check the Department of Labor's Retirement Savings Lost and Found database.

Common questions

How do I find my old Trillium Management 401(k)?

Contact the plan administrator listed on the plan's Form 5500 filing: Trillium Management, LLC, (212) 401-2337. The accounts are held by the recordkeeper, The Vanguard Group, Inc.. Have your Social Security number and dates of employment ready.

What is the Trillium Management 401(k) phone number?

The plan administrator phone number on the plan year 2025 filing is (212) 401-2337.

Contacts are as filed on each plan's latest Form 5500 and may be out of date. PlanFacts is not affiliated with Trillium Management and does not hold accounts. Not financial advice. Report a correction