Alnylam Pharmaceuticals, Inc. Savings & Investment Plan

What the Filing Says About Alnylam Pharmaceuticals, Inc. Savings & Investment Plan

Alnylam Pharmaceuticals, Inc. Savings & Investment Plan is a Profit Sharing retirement plan sponsored by Alnylam Pharmaceuticals, Inc., headquartered in Massachusetts. As of the 2024 Form 5500 filing, the plan reports $344M in total end-of-year assets and covers 1,689 participants across the Professional & Technical Services industry. The sponsor's EIN on file with the U.S. Department of Labor is 043696884, and the plan has been effective since 2003-01-01. Its filing status is currently FILING RECEIVED.

Year over year, total assets moved from $276M at the beginning of 2024 to $344M at year-end — a gain of 24.8%. Net assets (after liabilities) closed the year at $344M, with reported net income of $68M driven by investment returns, contributions received, and benefit payments during the period. These figures reflect what the plan administrator certified on Schedule H or Schedule I of the Form 5500 annual return and can be compared against 2 prior plan-year filings from the same sponsor shown below.

Asset totals and participant counts reflect a single plan year snapshot and can change materially with market conditions, plan mergers, or workforce changes. Fields such as "net income" include both realized investment performance and contribution/distribution flows — a single-year figure does not by itself indicate plan health or participant outcomes. This page summarizes public DOL disclosures for research and educational purposes only and is not retirement, tax, legal, or financial advice. Before making decisions about your own retirement benefits or evaluating an employer's plan, verify the underlying filing directly via the DOL EFAST2 system and consult a qualified professional.