Material Event (Form 8-K)

Item 8.01. Other Events.

On December 4, 2025, RadNet, Inc. (the "Company") filed a shelf registration statement on Form S-3 (File No. 333-291945) (the "Registration Statement") with the Securities and Exchange Commission (the "SEC") in order to maintain an effective shelf registration statement.

On December 4, 2025, the Company also filed with the SEC a prospectus supplement dated December 4, 2025 to the Registration Statement. The prospectus supplement (the "Resale Prospectus Supplement") was filed to register for resale from time to time by the selling stockholders referenced in the prospectus supplement of up to 73,567 shares of the Company's common stock, par value $0.0001 per share (the "Resale Shares"). Any such resales will be made under the Registration Statement and the Resale Prospectus Supplement. The Resale Prospectus Supplement supersedes the prospectus supplement and the accompanying prospectus previously filed by the Company with respect to the Resale Shares and relating to the Company's prior shelf registration statement.

In connection with the prospectus supplement, the Company is filing the opinion of its counsel, Reed Smith LLP, regarding the legality of the securities being registered, which opinion is attached as Exhibit 5.1 to this Current Report on Form 8-K.