401(k) · DOL Form 5500 · 2024

Amylyx Pharmaceuticals Inc. 401(k) Plan

Data updated 2026-08-25

$19M
Total assets Small plan by assets
328
Participants Below avg headcount
69th
Percentile by assets National rank
$57,195
Avg per participant Low balance/head
PlainRetire home → About this data RSS: change history

Official DOL plan name: Amylyx Pharmaceuticals Retirement Plan · Sponsored by Amylyx Pharmaceuticals Inc. · Massachusetts · Manufacturing

$19M in assets, 328 participants

Amylyx Pharmaceuticals Inc.'s Amylyx Pharmaceuticals Retirement Plan reported $19M in total assets and 328 participants in its 2024 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.

  • #10,342 in Manufacturing (17,777 peers)

Coverage in Massachusetts

Amylyx Pharmaceuticals Retirement Plan covers 328 participants in Massachusetts, about 50% of the average Massachusetts filer (state average ~659 per filing). Assets: $19M.

#10,342
in Manufacturing (17,777 peers)
+1.4%
assets growth YoY

Amylyx Pharmaceuticals Retirement Plan's outsized position by total assets

Amylyx Pharmaceuticals Retirement Plan vs every filed plan by assets

End-of-year total assets · plan year 2024 · DOL Form 5500

$18,759,978 Top 31% higher than 69% of 123,620 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 2024

Amylyx Pharmaceuticals Retirement Plan among mid-size filed plans by headcount

Plan-year 2024 Form 5500 filings with a reported participant count, partitioned by headcount band, not by assets. Amylyx Pharmaceuticals Retirement Plan sits mid-pack in the medium band (328 participants).

What changed between DOL Form 5500 filings

plan year 2023 → plan year 2024

  • Amylyx Pharmaceuticals Retirement Plan reported net income fell from $11M in the plan year 2023 filing to $257K in the plan year 2024 filing.
  • Amylyx Pharmaceuticals Retirement Plan reported participants rose from 221 in the plan year 2023 filing to 328 in the plan year 2024 filing.
  • Amylyx Pharmaceuticals Retirement Plan end-of-year assets rose from $19M in the plan year 2023 filing to $19M in the plan year 2024 filing.

See the national 2023→2024 release diff →

Published 5500 schedule card

Filing strip 464600503 · Amylyx Pharmaceuticals Inc. PY 2024 · 401(k)

Amylyx Pharmaceuticals Retirement Plan · $19M · 328 · 69th

  • VS-ST $19M
  • VS-ST 328
  • VS-ST 69th
  • VS-ST 401(k)
  • VS-ST near Applied Engineering, Inc. Employee Stock Ownership Plan and Trust
  • VS-ST ind #10342

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 Manufacturing retirement plans → · Plans in Massachusetts →

Amylyx Pharmaceuticals Retirement Plan in the asset neighbourhood

Amylyx Pharmaceuticals Retirement PlanAmylyx Pharmaceuticals Retir…$19MApplied Engineering, Inc. Employee Stock Ownership Plan and TrustApplied Engineering, Inc. Em…$19MClinicalmind, LLC 401(k) Plan$19MThe Wilderness Society 401(a) Retirement PlanThe Wilderness Society 401(a…$19MThompson & Horton LLP 401(k) PlanThompson & Horton LLP 401(k)…$19M
End-of-year total assets ($M) among Amylyx Pharmaceuticals Retirement Plan and nearest nationwide 401(k) peers. Source: DOL Form 5500 plan year 2024.

Massachusetts filing particulars

Total Assets (Beginning of Year)$19M
Net Assets (End of Year)$19M
Net Income$257K
Employer EIN464600503
Plan Effective Date2021-03-01
Filing StatusFILING RECEIVED

Sponsor Plan History (Amylyx Pharmaceuticals Inc.)

Sponsor-wide plan assets over time

All Amylyx Pharmaceuticals Inc. plans reported in each filing year

Latest sponsor-wide plan assets
$19M 1.390916379310997% vs 2023
2024 filing year
$18.4M$18.5M$18.6M$18.7M$18.8M 20232024 $18.5M $18.8M ▲ +1.4%
Year Plans Participants Total Assets
2023 1 221 $19M
2024 1 328 $19M

Nearby 401(k) Plans in Massachusetts

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

Amylyx Pharmaceuticals Retirement Plan vs. nearby 401(k) plans in Massachusetts, assets vs. participants Scatter plot of 6 data points. -20000020000400006000080000 -10010203040 Total assets ($B) Participants Amylyx Pharmaceuticals Retirement Plan, Total assets ($B): 0.018759978 · Participants: 328Amylyx Pharmaceuticals Retirement PlanFidelity Retirement Savings Plan, Total assets ($B): 34.201609937 · Participants: 66907Fidelity Retirement Savings PlanLiberty Mutual 401(k) Plan, Total assets ($B): 11.352606499 · Participants: 34618Liberty Mutual 401(k) PlanMassachusetts Institute of Technology Supplemental 401(k) Plan, Total assets ($B): 7.720373045 · Participants: 14762Massachusetts Institute of Technology Supplemental 401(k) PlanBoston Scientific Corporation 401(k) Retirement Savings Plan, Total assets ($B): 6.775289067 · Participants: 20639Boston Scientific Corporation 401(k) Retirement Savings PlanState Street Salary Savings Program, Total assets ($B): 6.532301643 · Participants: 12777State Street Salary Savings Program
Amylyx Pharmaceuticals Retirement Plan vs. nearby 401(k) plans in Massachusetts, assets vs. participants
Compare Amylyx Pharmaceuticals Retirement Plan side-by-side with 3 peers →

Amylyx Pharmaceuticals Retirement Plan's out-of-state 401(k) peers by assets and headcount

Outside Massachusetts, the nearest 401(k) by assets is Applied Engineering, Inc. Employee Stock Ownership Plan and Trust in ND ($19M); by covered participants it is Viking Cloud 401(k) Plan in IL (328 participants). Same-state nearby plans are listed separately above.

Similar participant headcount

Nearest other-state filings by covered participants (328 participants); asset peers above are excluded.

DOL Form 5500 plan year 2024. Asset totals can differ widely at the same headcount; neither axis is a quality rating.

Frequently Asked Questions

How did Amylyx Pharmaceuticals Retirement Plan assets move in 2024? ▼
Amylyx Pharmaceuticals Retirement Plan edged up modestly - up 1.4% during 2024, from $19M to $19M. Reported net income was $257K.
How have Amylyx Pharmaceuticals Inc. plan assets changed over time? ▼
Across 2 plan years on file (2023-2024), Amylyx Pharmaceuticals Inc.'s sponsor-wide assets grew 1.4%, from $19M to $19M.
Which 401(k) plans are similar in size to Amylyx Pharmaceuticals Retirement Plan? ▼
Among 401(k) plans in other states, the closest by assets is Applied Engineering, Inc. Employee Stock Ownership Plan and Trust in ND ($19M, 118 participants).
Which 401(k) plans cover a similar participant headcount to Amylyx Pharmaceuticals Retirement Plan? ▼
Among 401(k) plans in other states, the closest by covered participants is Viking Cloud 401(k) Plan in IL (328 participants, $20M in assets).

Source: U.S. Department of Labor, Employee Benefits Security Administration (EBSA), Form 5500 public disclosure dataset. Plan year 2024.

Source: DOL EFAST2 filing system (efast.dol.gov) - original filing retrieval by EIN 464600503.

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.