Regulatory press release

Increased number of shares and votes in Yubico

The number of shares and votes in Yubico AB (the "company") has, during May 2026, increased as a result of the board of directors' resolution to issue a total of 1,430,000 class C shares, corresponding to 143,000 votes, pursuant to the authorization granted by the annual general meeting on May 5, 2026. The share issue has been carried out under the company's long term incentive program, which was resolved upon by the annual general meeting, and the shares have been repurchased by the company.

Today, the last trading day of the month, there are a total of 88,721,882 shares in the company, of which 86,426,882 ordinary shares and 2,295,000 class C shares, and as of the same date the number of votes amounts to 86,656,382.

This disclosure contains information that Yubico AB is obliged to make public pursuant to the Financial Instruments Trading Act. The information was submitted for publication, through the agency of the designated contact person, on May 29, 2026, at 20.00 CEST.

About Yubico

Yubico (Nasdaq Stockholm: YUBICO), the inventor of the YubiKey, offers the gold standard for phishing-resistant multi-factor authentication (MFA), stopping account takeovers in their tracks and making secure login easy and available for everyone. Since the company was founded in 2007, it has been a leader in setting global standards for secure access to computers, mobile devices, servers, browsers, and internet accounts. Yubico is a creator and core contributor to the FIDO2, WebAuthn, and FIDO Universal 2nd Factor (U2F) open authentication standards, and is a pioneer in delivering modern, hardware-based passkey authentication security at scale to customers in over 175 countries.

Yubico’s solutions enable passwordless logins using the most secure form of passkey technology. YubiKeys work out-of-the-box across more than a thousand consumer and enterprise applications and services, delivering strong security with a fast and easy experience.

As part of its mission to make the internet more secure for everyone, Yubico donates YubiKeys to organizations helping at-risk individuals through the philanthropic initiative, Secure it Forward. The company is headquartered in Stockholm and Santa Clara, CA, and Singapore. For more information on Yubico, visit us at www.yubico.com.