401(k) · DOL Form 5500 · 2023
Alexion Pharmaceuticals, Inc. 401(k) Plan
Data updated 2026-08-25
- N/A
- Total assets —
- 2,509
- Participants Above avg headcount
Official DOL plan name: Alexion 401(k) Plan · Sponsored by Alexion Pharmaceuticals, Inc. · Massachusetts · Professional & Technical Services
N/A in assets, 2,509 participants
Alexion Pharmaceuticals, Inc.'s Alexion 401(k) Plan reported N/A in total assets and 2,509 participants in its 2023 DOL Form 5500 filing. Figures are as reported by the plan sponsor to the Department of Labor, not audited or endorsed by PlainRetire.
Coverage in Massachusetts
Alexion 401(k) Plan covers 2,509 participants in Massachusetts, 3.8x the typical Massachusetts plan (state average ~659 per filing). Assets: N/A.
- $121M
- reported net income
Alexion 401(k) Plan's large-plan peer group by participant headcount
Plan-year 2023 Form 5500 filings with a reported participant count, partitioned by headcount band, not by assets. Alexion 401(k) Plan lands in the large band (2,509 participants).
What changed between DOL Form 5500 filings
plan year 2022 → plan year 2023
- Alexion 401(k) Plan reported net income rose from -$50M in the plan year 2022 filing to $121M in the plan year 2023 filing.
- Alexion 401(k) Plan reported participants rose from 2,372 in the plan year 2022 filing to 2,509 in the plan year 2023 filing.
Published 5500 schedule card
Filing strip 854136092 · Alexion Pharmaceuticals, Inc. PY 2023 · 401(k)
Alexion 401(k) Plan · N/A · 2,509
- VS-ST N/A
- VS-ST 2,509
- VS-ST PY 2023
- VS-ST 401(k)
- VS-ST near Zoe Holding Company, Inc 401(k) Plan
- VS-ST 3.8× state
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 →
Massachusetts filing particulars
| Total Assets (Beginning of Year) | $462M |
|---|---|
| Net Assets (End of Year) | N/A |
| Net Income | $121M |
| Employer EIN | 854136092 |
| Plan Effective Date | 1993-08-01 |
| Filing Status | FILING RECEIVED |
Sponsor Plan History (Alexion Pharmaceuticals, Inc.)
Sponsor-wide plan assets over time
All Alexion Pharmaceuticals, Inc. plans reported in each filing year
- Latest sponsor-wide plan assets
- N/A
- 2023 filing year
| Year | Plans | Participants | Total Assets |
|---|---|---|---|
| 2022 | 1 | 2,372 | $462M |
| 2023 | 1 | 2,509 | N/A |
Nearby 401(k) Plans in Massachusetts
Peer 401(k) plans, same state, same plan type, ranked by total assets.
- 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
Alexion 401(k) Plan's closest out-of-state 401(k) peers by headcount
Outside Massachusetts, the nearest 401(k) by covered participants is Zoe Holding Company, Inc 401(k) Plan in AZ (2,509 participants; this filing: 2,509 participants).
Similar participant headcount
Nearest other-state filings by covered participants (2,509 participants); asset peers above are excluded.
- Zoe Holding Company, Inc 401(k) Plan (AZ) 2,509 · 0 off
- Cpsi 401(k) Retirement Plan (AL) 2,508 · 1 off
- Central Freight Lines, Inc. 401(k) Savings Plan (TX) 2,508 · 1 off
- Kaiser Aluminum Investments Company Hourly Savings and Investment Plan (TN) 2,511 · 2 off
DOL Form 5500 plan year 2023. Asset totals can differ widely at the same headcount; neither axis is a quality rating.