Seres Therapeutics, INC. 401(k) Plan

Form 5500 filing data for plan year 2025.

Plan Snapshot

  • Plan Sponsor: Seres Therapeutics, INC.
  • Sponsor EIN: 274326290
  • Sponsor Address: 101 CAMBRIDGE PARK DRIVE, CAMBRIDGE, MA, 02140
  • Plan Type: 401(k)
  • Plan Number: 001
  • Total Participants: 337
  • Total Assets: $43.6M

Key Plan Design Features

  • Auto-Enrollment: Yes
  • Auto-Escalation: No
  • Allows Roth Contributions: Yes
  • Participant Loans: No
  • Participant-Directed Investments: Yes
  • ERISA Section 404(c) Fiduciary Safe Harbor: Yes

Plan Financials by Year

YearParticipantsTotal AssetsEmployer Contrib.Employee Contrib.
2025337$43.6M$0$0
2024106$39.1M$1.1M$3.1M
2023244$39.3M$2.0M$5.8M
2022419$26.7M$1.8M$5.1M

Service Providers (Schedule C)

Vendors paid $5,000 or more for services to the plan, ranked by total compensation (direct + indirect fees).

Provider Name Role Direct Compensation Indirect Compensation Total Fees
CARON & BLETZER, PLLCAuditor——$0

Plan Fees & Expenses

Annual service provider fees and administrative expenses sourced from DOL Form 5500 filings.

  • Total Service Provider Fees: $0

Historical Administrative Expenses

Breakdown of administrative expense categories reported on Form 5500 filings.

Year Total Admin Expenses Investment Mgmt Fees Contract Admin Fees IQPA Audit Fees Professional Fees
2025$5,976,898————
2024$4,215————
2023$16,282————
2022$1,806————

Similar Plans