When CBRS insiders can sell

Eastern Time on the second trading day following our release of earnings for the quarter ending September 30, 2026 or (ii) 180 days after the date of this prospectus (the "Lock-up Period"), subject to certain customary exceptions and provisions that provide for the early release of certain of our securities during the Lock-up Period. In connection with such early- release provisions, we estimate an aggregate of up to approximately 171.1 million shares will be released from lock- up agreements or market standoff provisions during the Lock-up Period, including up to approximately 15.0 million shares held by our directors and officers subject to reporting under Section 16 of the Exchange Act .

Class A common stock to be outstanding immediately after this offering ........................................................... 30,000,000 shares (or 34,500,000 shares if the underwriters exercise their over-allotment option in full). Class B common stock to be outstanding immediately after this offering ........................................................... 185,110,345 shares. Class N common stock to be outstanding immediately after this offering ........................................................... None.

Eastern Time on the second trading day following our release of earnings for the quarter ending September 30, 2026 or (ii) 180 days after the date of this prospectus (the "Lock-up Period"), subject to certain customary exceptions and provisions that provide for the early release of certain of our securities during the Lock-up Period. In connection with such early- release provisions, we estimate an aggregate of up to approximately 171.1 million shares will be released from lock- up agreements or market standoff provisions during the Lock-up Period, including up to approximately 15.0 million shares held by our directors and officers subject to reporting under Section 16 of the Exchange Act .

Eastern Time on the second trading day following our release of earnings for the quarter ended March 31, 2026. If the Second Trading Day Release Trigger was satisfied, an aggregate of up to approximately 27.7 million shares held by Directors and Officers (as defined below) and Non-Employee Holders (as defined below). If the Second Trading Day Release Trigger was not satisfied, an aggregate of up to approximately 30.2 million shares held by Directors and Officers, Non- Executive Employees, and Non-Employee Holders. 6 00 a.m. Eastern Time on the second trading day following our release of earnings for the quarter ending June 30, 2026.

Eastern Time on the second trading day following our release of earnings for the quarter ending June 30, 2026. An aggregate of up to approximately 36.4 million shares held by Directors and Officers, Non-Executive Employees, and Non-Employee Holders. 6 00 a.m. Eastern Time on August 19, 2026. An aggregate of up to approximately 14.6 million shares held by Directors and Officers, Non-Executive Employees, and Non-Employee Holders. 6 00 a.m. Eastern Time on September 2, 2026. An aggregate of up to approximately 14.6 million shares held by Directors and Officers, Non-Executive Employees, and Non-Employee Holders.

Eastern Time on the second trading day following the effectiveness of the registration statement of which this prospectus forms a part, provided that the closing price of our Class A common stock on the Nasdaq Global Select Market on the First Trading Day has exceeded 133% of the initial public offering price per share set forth on the cover page of this prospectus (the "Second Trading Day Release Trigger") . An aggregate of up to 2.5 million shares held by Non- Executive Employees . 190 Table of Contents Earliest Date Available for Sale in the Public Market Number of Shares of Class A Common Stock 6 00 a.m. Eastern Time on the second trading day following our release of earnings for the quarter ended March 31, 2026.

…bound by a market standoff agreement that is at least as restrictive as the terms described herein (iv) facilitating the establishment of a trading plan on behalf of a stockholder, officer, or director pursuant to Rule 10b5-1 under the Exchange Act for the transfer of shares of Class A common stock, provided that (A) such plan does not provide for the transfer of Class A common stock during the Lock-up Period (except as otherwise permitted under the lock-up agreement) and (B) to the extent a public announcement or filing under the Exchange Act, if any, is required of or voluntarily made by us regarding the establishment of such pla…

…onal exceptions, including with respect to (i) any sales of our Class A common stock to the underwriters pursuant to the underwriting agreement to be entered into in connection with this offering (ii) transfers (A) as a bona fide gift or gifts (including contributions to a charitable organization or educational institution) or (B) for bona fide estate or tax planning purposes (including contributions to a family foundation) (iii) transfers by will, other testamentary document, or intestacy (iv) transfers to any trust for the direct or indirect benefit of the lock-up party or the immediate family of the lock-up party, or if the lock-…

…o be a participant, in which (i) the amount involved exceeded or will exceed $120,000 and (ii) any of our directors, executive officers, or holders of more than 5% of our capital stock, or any affiliate or member of the immediate family of the foregoing persons or entities, had or will have a direct or indirect material interest, other than compensation and other arrangements that are described under the section titled "Executive and Director Compensation." We believe the terms obtained or consideration that we paid or received, as applicable, in connection with the transactions described below were comparable to terms available or the amounts that we would pay or receive, as applicable, in arm's-length transactions.

At our request, the underwriters have reserved up to 1,500,000 shares of Class A common stock offered by this prospectus for sale at the initial public offering price through a directed share program to certain persons identified by our management and certain long-tenured employees, which may include parties with whom we have a business relationship and friends and family of management and such employees . See the section titled "Underwriters—Directed Share Program" for additional information . We have granted the underwriters the right to purchase up to an additional 4,500,000 shares of our Class A common stock from us to cover over-allotments, if any, at the initial public offering price less the underwriting discount.

…after giving effect to the Preferred Stock Conversion, the Common Stock Reclassification, and the RSU Net Settlement (each as defined below), and excludes 28,361,707 shares of our Class B common stock issuable upon the exercise of outstanding stock options as of December 31, 2025, with a weighted-average exercise price of $4.97 per share 10,403,567 shares of our Class B common stock issuable upon the vesting and settlement of RSUs subject to service-based and liquidity-based vesting conditions outstanding as of December 31, 2025, for which the service-based vesting condition was not yet satisfied as of December 31, 2025 and for whi…

LLC, Citigroup Global Markets Inc., and Barclays Capital Inc., on behalf of the underwriters, provided that we may release shares from such restrictions to the extent such shares would be entitled to release under the form of lock-up agreement with the underwriters signed by our directors and executive officers and certain other record holders of our securities as described herein. Notwithstanding the foregoing, and in each case, subject to the provisions of Rule 144 and Rule 701 under the Securities Act and our insider trading compliance policy, as applicable (i) 7.5% of the Eligible Securities held by Non-Executive Employees will be released beginning at 6 00 a.m.