Enpro Inc.

An investment in our common stock involves risks. For a detailed discussion of the risks that affect our business please refer to the section titled “Risk Factors” in our Annual Report on Form 10-K for the year ended December 31, 2025. There have been no material changes to our risk factors as previously disclosed in our Annual Report on Form 10-K for the year ended December 31, 2025.

The conflict between the United States, Israel, and Iran and related geopolitical instability may adversely affect our business.

In February 2026, the United States and Israel launched coordinated military strikes against Iran, which retaliated with missile and drone attacks across the region, including closing passage through the Strait of Hormuz, critical to commercial shipping in that region. Although we do not have operations in the Middle East, the ongoing conflict, including additional military actions, retaliatory measures, sanctions, continued disruptions to trade or transportation routes, cyberattacks, or other governmental or market responses, has and could continue to:

•cause significant disruption of global energy and petroleum-based products supplies and the supply of helium, a critical raw material for the semiconductor industry,

•adversely affect global supply chains, ocean transportation, energy markets, commodity prices, currency exchange rates, interest rates, financial markets and overall global macroeconomic conditions, and

•heighten inflationary pressures on our raw material costs and supply chain.

While we do not expect that the impact of the conflict between the United States, Israel and Iran will have a direct adverse effect on our business, we are unable to predict the extent or nature of any of these indirect impacts from the continuation of this conflict on our business, financial condition and results of operations at this time, and such impacts could be material.

The following table sets forth all purchases made by or on behalf of the Company or any “affiliated purchaser,” as defined in Rule 10b-18(a)(3) under the Exchange Act, of shares of our common stock during each month in the first quarter of 2026.

(1)In October 2024, our board of directors authorized an expenditure program of up to $50.0 million for the repurchase of our outstanding common shares through October 2026. We have not made any repurchases under this authorization.

(2)In March 2026, a total of 417 shares were transferred to a rabbi trust that we established in connection with our Deferred Compensation Plan for Non-Employee Directors, pursuant to which non-employee directors may elect to defer directors’ fees into common stock units. EnPro Holdings furnished these shares in exchange for management and other services provided by Enpro. Of these shares, 47 shares were valued at a price of $250.59 per share, the closing trading price of our common stock on March 18, 2026, and 370 of these shares were valued at a price of $250.65 per share, the closing trading price of our common stock on March 31, 2026. Accordingly, the total 417 shares were valued at a weighted average price of $250.64 per share. We do not consider the transfer of shares from EnPro Holdings in this context to be pursuant to a publicly announced plan or program.

During the quarter ended March 31, 2026, none of the Company’s directors or officers (as defined in Rule 16a-1(f) of the Exchange Act)adopted orterminated a “Rule 10b5-1 trading arrangement” or adopted or terminated a “non-Rule 10b5-1 trading arrangement” (as such terms are defined in Item 408 of Regulation S-K).