Item 5. Market for Registrant’s Common Equity
Item 5. Market for Registrant’s Common Equity, Related Shareholder Matters and Issuer Purchases of Equity Securities
The Company’s common stock is traded on the New York Stock Exchange under the symbol “ATMU.” As of January 31, 2026, there were 8 registered shareholders of common stock. This does not include the number of persons whose stock is in nominee or “street” name accounts through brokers.
We did not sell any equity securities during 2025 in offerings that were not registered under the Securities Act.
We did not have any stock repurchase activity for each of the three months in the quarter ended December 31, 2025.
On July 17, 2024, our Board of Directors authorized a $150 million share repurchase program. The program does not have an expiration date and may be suspended or discontinued at any time. Since the inception of the program, we repurchased approximately $80.7 million of common stock pursuant to this authorization and as of December 31, 2025, we had approximately $69.3 million of share repurchase authorization remaining. See related information in Note 16, Share Repurchase Program . While not considered repurchases of shares, the Company does at times withhold shares that would otherwise be issued under stock-based awards to pay the related taxes for grants of stock-based awards that vested.
Comparison of Cumulative Total Return
The following graph compares the cumulative total return on our common stock with the cumulative total return to the S&P 500 Index and S&P 500 Industrial Index. The graph assumes, in each case, that an initial investment of $100 is made as of May 26, 2023, our first day of trading. The cumulative total return reflects market prices at the end of each fiscal year post May 26, 2023.
Item 6. Reserved
Reserved.
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