| 1. | Subject to the exceptions set forth in Section 3, each Holder shall not, without the prior written consent of the board of directors of PubCo, Transfer any Lock-up Shares until the end of the Lock-up Period. |
| 2. | As used herein: |
| (a) | the term “Lock-up Period” means the period beginning on the Closing Date and ending on the date six (6) months after the Closing Date. |
| (b) | the term “Lock-up Shares” means any shares of Common Stock held by a Holder immediately after the Closing, not including the Common Stock issued or purchased pursuant to those certain subscription agreements by and between PCSC and Holders, dated as of December 5, 2025. |
| (c) | the term “Transfer” means (i) sell, offer to sell, contract or agree to sell, assign, transfer (including by operation of law), hypothecate, pledge, distribute, grant any option to purchase or otherwise dispose of or agree to dispose of, directly or indirectly, file (or participate in the filing of) a registration statement with the SEC or establish or increase a put equivalent position or liquidate or decrease a call equivalent position within the meaning of Section 16 of the Securities Exchange Act of 1934, as amended (the “Exchange Act”), with respect to any Lock-up Shares, (ii) deposit any Lock-up Shares into a voting trust or enter into a voting agreement or arrangement or grant any proxy or power of attorney with respect thereto that is inconsistent with this Agreement, (iii) enter into any swap or other arrangement that transfers to another, in whole or in part, any of the economic consequences of ownership of any Lock-up Shares, whether any such transaction is to be settled by delivery of such Lock-up Shares, in cash or otherwise, or (iv) publicly announce any intention to effect any transaction specified in clauses (i) through (iii); |
| (d) | the term “Permitted Transferees” means, prior to the expiration of the Lock-up Period, any person or entity to whom such Lock-up Holder is permitted to transfer such shares of Common Stock prior to the expiration of the Lock-up Period pursuant to paragraph 3; and |
| 3. | The restrictions set forth in paragraph 1 shall not apply to: |
| (a) | a Transfer to PubCo’s officers or directors, any affiliate or family member of any of PubCo’s officers or directors, any members or partners of the Holder or their affiliates, any affiliates of the Holder, or any employees of such affiliates; |
| (b) | in the case of an individual, a Transfer by gift to a member of the individual’s immediate family (as defined below), or to a trust, the beneficiary of which is the individual or a member of the individual’s immediate family or an affiliate of such person, or to a charitable organization; |
| (c) | in the case of an individual, Transfers by virtue of laws of descent and distribution upon death of the individual; |
| (d) | in the case of an individual, Transfers by operation of law or pursuant to a qualified domestic relations order; |
| (e) | in the case of an individual, Transfers to a partnership, limited liability company or other entity of which the undersigned and/or the immediate family (as defined below) of the undersigned are the legal and beneficial owner of all of the outstanding equity securities or similar interests; |
| (f) | in the case of an entity, Transfers to any direct or indirect partners, members or equity holders of such entity, or any related investment funds or vehicles controlled or managed by such persons or entities or their respective affiliates; |
| (g) | in the case of an entity that is a trust, Transfers to a trustor or beneficiary of the trust or to the estate of a beneficiary of such trust; |
| (h) | in the case of an entity, Transfers by virtue of the laws of the entity’s jurisdiction of formation or incorporation or the entity’s organizational documents upon dissolution of the entity; |
| (i) | Transfers to any other Holders, any affiliates of such other Holders or their Permitted Transferees or any related investment funds or vehicles controlled or managed by such persons or entities or their respective affiliates; |
| (j) | the exercise of stock options or warrants to purchase shares of Common Stock or the vesting of stock awards of Common Stock and any related transfer of shares of Common Stock to PubCo in connection therewith (x) deemed to occur upon the “cashless” or “net” exercise of such options or warrants or (y) for the purpose of paying the exercise price of such options or warrants or for paying taxes due as a result of the exercise of such options or warrants, the vesting of such options, warrants or stock awards, or as a result of the vesting of such shares of Common Stock, it being understood that all shares of Common Stock received upon such exercise, vesting or transfer will remain subject to the restrictions of this Agreement during the Lock-Up Period; |
| (k) | Transfers to PubCo pursuant to any contractual arrangement in effect at the Closing that provides for the repurchase by PubCo or forfeiture of Common Stock or other securities convertible into or exercisable or exchangeable for Common Stock in connection with the termination of the Holder’s service to PubCo; |
| (l) | the entry, by the Holder, at any time after the Closing, of any trading plan providing for the sale of shares of Common Stock by the Holder, which trading plan meets the requirements of Rule 10b5-l(c) under the Exchange Act, provided, however, that such plan does not provide for, or permit, the sale of any shares of Common Stock during the Lock-Up Period and no public announcement or filing is voluntarily made or required regarding such plan during the Lock-Up Period; and |
| (m) | Transfers in connection with a liquidation, merger, stock exchange, reorganization, tender offer approved by PubCo’s board of directors or a duly authorized committee thereof or other similar transaction which results in all of PubCo’s stockholders having the right to exchange their shares of Common Stock for cash, securities or other property. |
| 4. | For the avoidance of doubt, each Holder shall retain all of its rights as a stockholder of PubCo with respect to the Lock-up Shares during the Lock-Up Period, including the right to vote any Lock-up Shares that are entitled to vote. |
| 5. | In furtherance of the foregoing, PubCo, and any duly appointed transfer agent for the registration or transfer of the securities described therein, are hereby authorized to decline to make any transfer of securities if such transfer would constitute a violation or breach of this Agreement, and such purported Transfer shall be null and void ab initio. In addition, during the Lock-Up Period, each certificate or book-entry position evidencing the Lock-Up Shares shall be marked with a legend in substantially the following form, in addition to any other applicable legends: |
| 6. | PubCo represents that it has not entered into any side letter or agreement with any Holder which provides any rights or benefits to such Holder that are materially more favorable to such Holder than the rights and benefits in this Agreement and will not enter into any such side letter or agreement unless such rights and benefits are also offered to the other Holders. PubCo agrees that this Agreement shall not be amended or modified, and no terms or conditions thereof waived, in a manner that benefits any Holder, unless the terms of such amendment, modification or waiver is also offered to the other Holders. |
| 7. | Notwithstanding the other provisions set forth herein, PubCo’s board of directors may, in its sole discretion, determine to waive, amend, or repeal the restrictions set forth in paragraph 1 above, whether in whole or in part; provided, that any such waiver, amendment or repeal shall (i) not make such restrictions more restrictive or apply for a longer period of time, and (ii) apply to each Holder. |
| 8. | This Agreement, together with the agreements referenced herein, sets forth the entire agreement of the parties hereto with respect to the subject matter hereof and thereof and supersedes all prior and contemporaneous understandings and agreements related thereto (whether written or oral), all of which are merged herein. No provision of this Agreement or any of the agreements referenced herein may be explained or qualified by any agreement, negotiations, understanding, discussion, conduct or course of conduct or by any trade usage. Except as otherwise expressly stated herein or in any of the agreements referenced herein, there is no condition precedent to the effectiveness of any provision hereof or thereof. |
| 9. | Sections 8.2 (Entire Agreement; Assignment), 8.3 (Amendment), 8.5 (Governing Law), 8.10 (Severability), 8.11 (Counterparts; Facsimile Signatures), 8.13 (No Recourse), 8.15 (Waiver of Jury Trial) and 8.16 (Submission to Jurisdiction) of the Business Combination Agreement are each hereby incorporated by reference into this Agreement as set forth herein (including any relevant definitions contained in any such sections), mutatis mutandis. |
| 10. | This Agreement shall terminate on the expiration of the Lock-up Period. |
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