401(k) · DOL Form 5500 · 2023
Alnylam Pharmaceuticals, Inc. 401(k) Plan
Data updated 2026-08-11
- $276M
- Total assets
- 1,639
- Participants
- 96th
- Percentile by assets
- $168,161
- Avg per participant
Official DOL plan name: Alnylam Pharmaceuticals, Inc. Savings & Investment Plan · Sponsored by Alnylam Pharmaceuticals, Inc. · Massachusetts · Professional & Technical Services
$276M in assets, 1,639 participants
Alnylam Pharmaceuticals, Inc.'s Alnylam Pharmaceuticals, Inc. Savings & Investment Plan reported $276M in total assets and 1,639 participants in its 2023 DOL Form 5500 filing, ranking in the 96th 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.
- 96th percentile by assets (of 127,072 plans)
- #19,707 in Professional & Technical Services (20,321 peers)
Coverage in Massachusetts
Alnylam Pharmaceuticals, Inc. Savings & Investment Plan covers 1,639 participants in Massachusetts, 2.5x the typical Massachusetts plan (state average ~659 per filing). Assets: $276M.
- $276M
- total plan assets (2023 EOY)
- 1,639
- covered participants
- 96th
- percentile by assets (of 127,072 plans)
- $168,161
- avg assets per participant
What changed between DOL Form 5500 filings
plan year 2022 → plan year 2023
- Alnylam Pharmaceuticals, Inc. Savings & Investment Plan reported net income rose from -$3M in the plan year 2022 filing to $65M in the plan year 2023 filing.
- Alnylam Pharmaceuticals, Inc. Savings & Investment Plan end-of-year assets rose from $210M in the plan year 2022 filing to $276M in the plan year 2023 filing.
- Alnylam Pharmaceuticals, Inc. Savings & Investment Plan reported participants rose from 1,314 in the plan year 2022 filing to 1,639 in the plan year 2023 filing.
Participants vs Massachusetts filers
In Massachusetts, the average filing covers about 659 participants across 4,265 plans. Alnylam Pharmaceuticals, Inc. Savings & Investment Plan reports 1,639 participants - 2.5x that state average ($276M EOY assets).
Massachusetts filing particulars
| Total Assets (Beginning of Year) | $210M |
|---|---|
| Net Assets (End of Year) | $276M |
| Net Income | $65M |
| Employer EIN | 043696884 |
| Plan Effective Date | 2003-01-01 |
| Filing Status | FILING RECEIVED |
Sponsor Plan History (Alnylam Pharmaceuticals, Inc.)
| Year | Plans | Participants | Total Assets |
|---|---|---|---|
| 2022 | 1 | 1,314 | $210M |
| 2023 | 1 | 1,639 | $276M |
| 2024 | 1 | 1,689 | $344M |
Nearby 401(k) Plans in Massachusetts
Peer 401(k) plans, same state, same plan type, ranked by total assets.
Alnylam Pharmaceuticals, Inc. Savings & Investment Plan vs. nearby 401(k) plans in Massachusetts, assets vs. participants
- Fidelity Retirement Savings Plan $28.6B · 62,289
- Liberty Mutual 401(k) Plan $10.6B · 37,052
- Massachusetts Institute of Technology Supplemental 401(k) Plan $6.8B · 14,094
- Boston Scientific Corporation 401(k) Retirement Savings Plan $5.8B · 19,881
- Philips North America 401(k) Plan $5.8B · 19,120
Similar-Sized 401(k) Plans Nationally
401(k) plans in other states closest to Alnylam Pharmaceuticals, Inc. Savings & Investment Plan by total assets, not by location.
- Children's Health System, Inc. 401(k) Plan (VA) $275M · 3,891
- State Bankshares 401(k) Profit Sharing Plan (ND) $275M · 1,942
- Sally Beauty 401(k) and Profit Sharing Plan (TX) $275M · 17,873
- Midwest Radiology P.a. Profit Sharing Plan (MN) $275M · 380
Frequently Asked Questions
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Filing takeaways
Ways to act on Alnylam Pharmaceuticals, Inc. Savings & Investment Plan's numbers.
- By total assets, Alnylam Pharmaceuticals, Inc. Savings & Investment Plan ranks in the top 5% of all filed plans by assets. See the largest plans
- Compare it side-by-side against 3 similar 401(k) plans in Massachusetts. Compare plans
- Alnylam Pharmaceuticals, Inc.'s sponsor-wide assets have grown 63.7% since 2022 across 3 plan years on file. More Professional & Technical Services plans