401(k) · DOL Form 5500 · 2023

Rhythm Pharmaceuticals Inc. 401(k) Plan

Data updated 2026-08-25

$17M
Total assets Small plan by assets
140
Participants Small participant base
69th
Percentile by assets National rank
$119,648
Avg per participant Near avg balance/head
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Official DOL plan name: Rhythm Pharmaceuticals Inc. 401(k) Plan · Sponsored by Rhythm Pharmaceuticals Inc. · Massachusetts · Professional & Technical Services

$17M in assets, 140 participants

Rhythm Pharmaceuticals Inc.'s Rhythm Pharmaceuticals Inc. 401(k) Plan reported $17M in total assets and 140 participants in its 2023 DOL Form 5500 filing, ranking in the 69th percentile by assets among filed plans. Figures are as reported by the plan sponsor to the Department of Labor, not audited or endorsed by PlainRetire.

  • #13,963 in Professional & Technical Services (20,321 peers)

Coverage in Massachusetts

Rhythm Pharmaceuticals Inc. 401(k) Plan covers 140 participants in Massachusetts, about 21% of the average Massachusetts filer (state average ~659 per filing). Assets: $17M.

#13,963
in Professional & Technical Services (20,321 peers)
+48.3%
assets growth YoY

Rhythm Pharmaceuticals Inc. 401(k) Plan's outsized position by total assets

Rhythm Pharmaceuticals Inc. 401(k) Plan vs every filed plan by assets

End-of-year total assets · plan year 2023 · DOL Form 5500

$16,750,725 Top 31% higher than 69% of 127,068 filed plans

This plan $0 $2,050,000,000 every filed plan with reported assets, bucketed by value

Dashed line + filled bar = this entry, among filed plans.

Source U.S. Department of Labor Form 5500 filings (EBSA) · plan year 2023

Rhythm Pharmaceuticals Inc. 401(k) Plan among mid-size filed plans by headcount

Plan-year 2023 Form 5500 filings with a reported participant count, partitioned by headcount band, not by assets. Rhythm Pharmaceuticals Inc. 401(k) Plan sits mid-pack in the medium band (140 participants).

What changed between DOL Form 5500 filings

plan year 2022 → plan year 2023

  • Rhythm Pharmaceuticals Inc. 401(k) Plan reported net income rose from $2M in the plan year 2022 filing to $5M in the plan year 2023 filing.
  • Rhythm Pharmaceuticals Inc. 401(k) Plan end-of-year assets rose from $11M in the plan year 2022 filing to $17M in the plan year 2023 filing.
  • Rhythm Pharmaceuticals Inc. 401(k) Plan reported participants rose from 115 in the plan year 2022 filing to 140 in the plan year 2023 filing.

See the national 2022→2023 release diff →

EBSA filing schedule strip

Filing strip 462159271 · Rhythm Pharmaceuticals Inc. PY 2023 · 401(k)

Rhythm Pharmaceuticals Inc. 401(k) Plan · $17M · 140 · 69th

  • BOY $17M
  • SCH 140
  • EBSA 69th
  • PART 401(k)
  • TYPE near Gault Energy Retirement Plan
  • NET ind #13963

Stamps derive from this plan's Form 5500 line items (assets, participants, type, EIN, cohort placement) - not a quality rating of the sponsor. Read with Professional & Technical Services retirement plans → · Plans in Massachusetts →

Rhythm Pharmaceuticals Inc. 401(k) Plan in the asset neighbourhood

Rhythm Pharmaceuticals Inc. 401(k) PlanRhythm Pharmaceuticals Inc. …$17MGault Energy Retirement Plan$17MDynamic Fastener Service, Inc. Profit Sharing Plan & TrustDynamic Fastener Service, In…$17MO'rourke Bros., Inc. 401(k) Profit Sharing PlanO'rourke Bros., Inc. 401(k) …$17MBanyan Air Services, Inc. 401(k) PlanBanyan Air Services, Inc. 40…$17M
End-of-year total assets ($M) among Rhythm Pharmaceuticals Inc. 401(k) Plan and nearest nationwide 401(k) peers. Source: DOL Form 5500 plan year 2023.

Massachusetts filing particulars

Total Assets (Beginning of Year)$11M
Net Assets (End of Year)$17M
Net Income$5M
Employer EIN462159271
Plan Effective Date2016-01-01
Filing StatusFILING RECEIVED

Sponsor Plan History (Rhythm Pharmaceuticals Inc.)

Sponsor-wide plan assets over time

All Rhythm Pharmaceuticals Inc. plans reported in each filing year

Latest sponsor-wide plan assets
$23M 103.11084526018743% vs 2022
2024 filing year
$10M$15M$20M$25M 202220232024 $11.3M $23M ▲ +103.1%
Year Plans Participants Total Assets
2022 1 115 $11M
2023 1 140 $17M
2024 1 170 $23M

Nearby 401(k) Plans in Massachusetts

Peer 401(k) plans, same state, same plan type, ranked by total assets.

Rhythm Pharmaceuticals Inc. 401(k) Plan vs. nearby 401(k) plans in Massachusetts, assets vs. participants Scatter plot of 6 data points. -20000020000400006000080000 -10010203040 Total assets ($B) Participants Rhythm Pharmaceuticals Inc. 401(k) Plan, Total assets ($B): 0.016750725 · Participants: 140Rhythm Pharmaceuticals Inc. 401(k) PlanFidelity Retirement Savings Plan, Total assets ($B): 28.649852331 · Participants: 62289Fidelity Retirement Savings PlanLiberty Mutual 401(k) Plan, Total assets ($B): 10.556596852 · Participants: 37052Liberty Mutual 401(k) PlanMassachusetts Institute of Technology Supplemental 401(k) Plan, Total assets ($B): 6.829912863 · Participants: 14094Massachusetts Institute of Technology Supplemental 401(k) PlanBoston Scientific Corporation 401(k) Retirement Savings Plan, Total assets ($B): 5.786107181 · Participants: 19881Boston Scientific Corporation 401(k) Retirement Savings PlanPhilips North America 401(k) Plan, Total assets ($B): 5.779286156 · Participants: 19120Philips North America 401(k) Plan
Rhythm Pharmaceuticals Inc. 401(k) Plan vs. nearby 401(k) plans in Massachusetts, assets vs. participants
Compare Rhythm Pharmaceuticals Inc. 401(k) Plan side-by-side with 3 peers →

Rhythm Pharmaceuticals Inc. 401(k) Plan's out-of-state 401(k) peers by assets and headcount

Outside Massachusetts, the nearest 401(k) by assets is Gault Energy Retirement Plan in CT ($17M); by covered participants it is Pds 401(k) Plan for Corporate Staff Employees in TX (140 participants). Same-state nearby plans are listed separately above.

Similar participant headcount

Nearest other-state filings by covered participants (140 participants); asset peers above are excluded.

DOL Form 5500 plan year 2023. Asset totals can differ widely at the same headcount; neither axis is a quality rating.

Frequently Asked Questions

How did Rhythm Pharmaceuticals Inc. 401(k) Plan assets move in 2023? ▼
Rhythm Pharmaceuticals Inc. 401(k) Plan surged - up 48.3% during 2023, from $11M to $17M. Reported net income was $5M.
How have Rhythm Pharmaceuticals Inc. plan assets changed over time? ▼
Across 3 plan years on file (2022-2024), Rhythm Pharmaceuticals Inc.'s sponsor-wide assets grew 103.1%, from $11M to $23M.
Which 401(k) plans are similar in size to Rhythm Pharmaceuticals Inc. 401(k) Plan? ▼
Among 401(k) plans in other states, the closest by assets is Gault Energy Retirement Plan in CT ($17M, 245 participants).
Which 401(k) plans cover a similar participant headcount to Rhythm Pharmaceuticals Inc. 401(k) Plan? ▼
Among 401(k) plans in other states, the closest by covered participants is Pds 401(k) Plan for Corporate Staff Employees in TX (140 participants, N/A in assets).

Source: U.S. Department of Labor, Employee Benefits Security Administration (EBSA), Form 5500 public disclosure dataset. Plan year 2023.

Source: DOL EFAST2 filing system (efast.dol.gov) - original filing retrieval by EIN 462159271.

Read our methodology - how this data is sourced, computed, and verified.

Data sourced from U.S. Department of Labor Form 5500 filings (EBSA). See our methodology for details.