When YSS insiders can sell

…r exercisable for our common stock, including AE Industrial Partners, have agreed, subject to certain exceptions, not to dispose of or hedge any of their common stock or securities convertible into or exchangeable for shares of common stock during the period from the date of this prospectus continuing through the date 180 days after the date of this prospectus, except with the prior written consent of at least two of the representatives (which must include Goldman Sachs & Co. LLC) on behalf of the underwriters. When the lock-up period in these agreements expires, we, our officers and directors, AE Industrial Partners, and such other stockholders will be able to sell shares in the public market. In addition, at least two of the representatives (which must include Goldman Sachs & Co. LLC) on behalf of the underwriters may, in their sole discretion, release all or some portion of the shares……

Common stock to be outstanding after this offering 126,944,387 shares (or 129,719,387 shares if the underwriters exercise in full their option to purchase additional shares of common stock). Use of proceeds We estimate that we will receive net proceeds from this offering of approximately $582.6 million (or approximately $671.6 million if the underwriters exercise in full their option to purchase additional shares of common stock) after deducting underwriting discounts and commissions and estimated offering expenses payable by us.

(vii) above, that the donee, devisee, transferee or distributee has agreed to be bound by a lock-up agreement in the form of the lock-up agreement; (b) enter into or amend a written plan meeting the requirements of Rule 10b5-1 under the Exchange Act relating to the transfer, sale or other disposition of the lock-up party's Lock-Up Securities, if then permitted by us, provided that none of the securities subject to such plan may be transferred, sold or otherwise disposed of until after the expiration of the restricted period and no public announcement, report or filing under the Exchange Act, or any other public filing, report or ann…

Notwithstanding the foregoing, the lock-up parties may: (a) transfer the Lock-Up Securities (i) as one or more bona fide gifts or charitable contributions, or for bona fide estate planning purposes, (ii) upon death by will, testamentary document or intestate succession, (iii) if the lock-up party is a natural person, to any member of the lock-up party's immediate family (for purposes of the lock-up agreement, "immediate family" shall mean any relationship by blood, current or former marriage, domestic partnership or adoption,…

…participant or will be a participant, in which: the amounts involved exceeded or will exceed $120,000; and any of our directors, executive officers, or holders of more than 5% of our capital stock, or any member of the immediate family of, or person sharing the household with, the foregoing persons, had or will have a direct or indirect material interest. Class P Unit Investment In the fourth quarter of 2025, the Company issued and sold an aggregate of approximately 240,956 Class P Units to several investors, including funds affiliated with AE Industrial Partners, for an aggregate purchase price of approximately $241.0 million. Eac…

See "Underwriting—Directed Share Program." The underwriters expect to deliver the shares of common stock against payment in New York, New York on or about January 30, 2026. Joint Book-Runners Goldman Sachs & Co. LLC Jefferies Wells Fargo Securities J.P. Morgan Citigroup Truist Securities Baird Raymond James Co-Managers Canaccord Genuity Needham & Company Academy Securities Prospectus dated January 28, 2026. Table of Contents Table of…

We may issue shares of our capital stock from time to time for a variety of corporate purposes, including in capital-raising activities through future public offerings or private placements, in connection with the exercise of stock options and warrants, vesting of RSUs and other issuances relating to our employee benefit plans and as consideration for future acquisitions, investments, or other purposes. The number of shares of our capital stock that we may issue may be significant, depending on the events surrounding such issuances. In some cases, the shares we issue may be freely tradable without restriction or further regist…

LLC) on behalf of the underwriters may, in their sole discretion, release all or some portion of the shares subject to the lock-up agreements prior to the expiration of the lock-up period. See "Shares Eligible for Future Sale." Sales of a substantial number of such shares, or the perception that such sales may occur, upon the expiration or early release of the securities subject to the lock-up agreements could cause the price of our common stock to decline or make it more difficult for you to sell your common stock at a time and price that you deem appropriate.