Two Sigma Investments, Lp 401(k) Plan: Login, Facts & Contact Information

Two Sigma Investments, Lp 401(k) Plan Facts

Plan name
TWO SIGMA 401(K) PLAN
Plan type
401(k) with employer contributions and profit sharing
Plan sponsor
TWO SIGMA INVESTMENTS, LP
Participants
2,615 (1,668 active employees)
Former employees with a balance
915
Plan assets
$698,403,150 at Dec 31, 2024
Average account balance
$272,601 across 2,562 accounts
Employer contributions
$9,575,569 in plan year 2024 (11% of all contributions)
Recordkeeper
Fidelity Investments Institutional
Plan year
Jan 1, 2024 – Dec 31, 2024
Plan established
Jan 1, 2001
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

  • $84.2 million went into the plan in contributions, $9.58 million of it from the employer (11%).
  • $35.8 million was paid out to participants.
  • Investment and other income added $98.5 million.
  • Administrative expenses were $27,617, about $11 per account.

How the Two Sigma Investments, Lp 401(k) changed, 20192024

Plan yearParticipantsPlan assetsEmployer contributionsBenefits paid
20191,758$288.8 million$7.61 million$17.4 million
20201,982$370.1 million$7.85 million$25.2 million
20212,043$455.2 million$8.18 million$35.8 million
20222,191$408.9 million$8.13 million$25.1 million
20232,538$556.1 million$9.72 million$25.0 million
20242,615$698.4 million$9.58 million$35.8 million

Two Sigma Investments, Lp 401(k) Contact Information

Phone
212-625-5700
Mailing address
100 AVENUE OF THE AMERICAS 16TH FLOOR, NEW YORK NY 10013
Plan sponsor
TWO SIGMA INVESTMENTS, LP
Employer identification number (EIN)
13-4181471
Plan number
001

Questions about the Two Sigma Investments, Lp 401(k)

Does Two Sigma Investments, Lp contribute to the 401(k)?

Yes. The plan reports an employer contribution arrangement. In plan year 2024 the employer contributed $9.58 million, 11% of all contributions.

Does the Two Sigma Investments, Lp 401(k) have automatic enrollment?

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

How many people are in the Two Sigma Investments, Lp 401(k) plan?

2,615 participants at the start of plan year 2024, 1,668 of them active employees, and 915 former employees who still had money in the plan.

What is the average 401(k) balance at Two Sigma Investments, Lp?

About $272,601 per account: $698.4 million in plan assets across 2,562 accounts with a balance at the end of plan year 2024.

Who manages the Two Sigma Investments, Lp 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 Two Sigma Investments, Lp. 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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