ASPEN AEROGELS INC

The ownership of our common stock involves a number of risks and uncertainties. When evaluating the Company and our business before making an investment decision regarding our securities, potential investors should carefully consider the risk factors and uncertainties described in Part 1, Item 1A. “Risk Factors” of our Annual Report. Since the filing of our Annual Report, there have been no material changes in our risk factors from those disclosed therein other than as described below.

Our business, results of operations and financial condition may be adversely affected by uncertainty and changes in U.S. trade policies, including tariffs, quotas, trade agreements or other trade restrictions imposed by the U.S. or other governments. For example, in April 2025, the U.S. government announced a 10% tariff on product imports from almost all countries and individualized higher tariffs on certain other countries, including a 145% tariff on product imports from China. Several tariff announcements have been followed by announcements of limited exemptions and temporary pauses. These actions have caused substantial uncertainty and volatility in financial markets and may result in retaliatory measures on U.S. goods.

Our business requires access to materials to manufacture our products, some of which we source from suppliers located outside the United States. Any imposition of or increase in tariffs or other restrictions on imports of materials on which our products rely, as well as corresponding price increases for such materials available domestically, if any, could increase our costs. We would likely be unable to pass all or any such cost increases on to our customers and such cost increases could materially and adversely affect our business, results of operations and financial condition, including our gross margin.

Tariffs or other trade restrictions may lead to continuing uncertainty and volatility in U.S. and global financial and economic conditions and commodity markets, declining consumer confidence, significant inflation and diminished expectations for the economy. Such conditions could have a material adverse impact on our business, results of operations and financial position. Also, disruptions and volatility in the financial markets may lead to adverse changes in the availability, terms and cost of capital. Such adverse changes could increase our costs of capital and limit our access to external financing sources.