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Form 8-K · Current Report · Filed 2025-09-10

Alnylam Announces Convertible Senior Notes Offering

Alnylam Pharmaceuticals, Inc. announced the commencement of its proposed offering of $500 million convertible senior notes due 2028 to qualified institutional buyers under Rule 144A. The notes, which are senior, unsecured obligations, will accrue interest payable semi-annually and mature on September 15, 2028. Noteholders have the right to convert their notes in certain circumstances and during specified periods. The offering of the notes is subject to market conditions and there can be no assurance as to when the offering may be completed, or as to the actual size or terms of the offering. Alnylam intends to use a portion of the net proceeds from the offering to pay the cost of capped call transactions and to repurchase a portion of its existing 1.00% convertible senior notes due 2027.

Filer
Alnylam Pharmaceuticals Inc. ALNY · NASDAQ
Filed
Accession
0001193125-25-199686
CIK
0001178670
Signal
Medium impactHealthcare

Items reported

Item 8.01

Other Events

Convertible Notes Offering
Item 9.01

Financial Statements and Exhibits

Exhibits Furnished

Market reaction

Close before filing

$482.13

Next session

-2.8%

Since filing

-57.4%

Latest close

$205.52

What happened, not what will happen — closing prices around the filing date.

Precedent

Previous filings from ALNY reporting the same item, with the next session's move:

About Alnylam Pharmaceuticals Inc.

Alnylam Pharmaceuticals Inc. is a pioneering biotechnology company dedicated to transforming the lives of patients through RNA interference (RNAi) therapeutics. This scientific approach allows for innovative treatments that can silence genes responsible for certain diseases, offering a unique angle on genetic therapies. Alnylam's primary focus is on developing therapeutics for genetic, cardio-metabolic, hepatic infectious, and central nervous system diseases, contributing to redefining how these conditions are treated. The company's groundbreaking work in RNAi provides a platform for addressing otherwise untreatable or poorly managed medical conditions, positioning it as a leader in the biotechnology sector. With numerous collaborations, partnerships, and a growing pipeline of therapeutics, Alnylam plays a crucial role in advancing modern medicine and contributing to the evolving landscape of genetic therapeutics. Headquartered in Cambridge, Massachusetts, Alnylam underscores the critical intersection of innovation, medicine, and gene science in the financial and pharmaceutical markets.

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