Exhibit 10.4

September 9, 2025

Maywood Acquisition Corp.

418 Broadway, #6441

Albany, New York 12207

Ladies and Gentlemen:

Reference is made to the letter agreement, dated February 12, 2025 (“Prior Letter Agreement”), entered into in connection with the initial public offering (the “Public Offering”) of Maywood Acquisition Corp., a Cayman Islands exempted company (the “Company”), by and among the Company, Maywood Sponsor LLC, a Delaware limited liability company (the “Sponsor”), and the members of the Company’s board of directors and management team (each, an “IPO Insider” and, collectively, the “IPO Insiders”) and the Securities Transfer Agreement, dated September 9, 2025 (“Transfer Agreement”), by and between the Sponsor and Inflection Point Fund I LP, a Delaware limited partnership (“Inflection Point”), pursuant to which, among other things, the Sponsor will transfer certain of the Founder Shares held by it to Inflection Point.

Paragraph 12 of the Prior Letter Agreement provides that the Prior Letter Agreement may not be changed, amended, modified or waived except by a written instrument signed by all of the parties thereto. In order to induce the Sponsor to enter into the Transfer Agreement, and for other good and valuable consideration, the receipt and sufficiency of which are hereby acknowledged, each of the Sponsor, Inflection Point and the IPO Insiders, as well as the other undersigned individuals, who will become a member of the Company’s board of directors and/or management team upon consummation of the transactions contemplated in the Transfer Agreement (such individuals, the “New Insiders” and, together with the IPO Insiders, the “Insiders”), desire to amend and restate the Prior Letter Agreement in its entirety by entering into this letter agreement (this “Letter Agreement”). Upon execution and delivery of this Letter Agreement by the parties hereto, the Prior Letter Agreement shall cease to be of any force and effect and this Letter Agreement shall govern for all purposes with respect to the matters set forth herein. Certain capitalized terms used herein are defined in paragraph 10 hereof.

The Sponsor, Inflection Point and each Insider acknowledges that it, he or she will not be entitled to rights to liquidating distributions from the Trust Account with respect to any Founder Shares and any shares underlying the Private Placement Units held by it, him or her if the Company fails to complete a Business Combination within the Completion Window; provided that it, he or she will be entitled to liquidating distributions from the Trust Account with respect to any Offering Shares it, he or she holds if the Company fails to complete a Business Combination within the prescribed time frame. The Sponsor and each Insider hereby further acknowledge that it, he or she will not be entitled to (a) redemption rights with respect to any Founder Shares, any shares underlying the Private Placement Units and Offering Shares held by it, him or her, in connection with the consummation of a Business Combination, or (b) redemption rights with respect to Founder Shares, any shares underlying the Private Placement Units and Offering Shares held by it, him or her in connection with a shareholder vote to amend the Memorandum and Articles in the manner described above.

(b) Subject to the exceptions set forth herein, the Sponsor and each Insider agree not to Transfer any Private Placement Units (including the underlying securities) held by it, him or her until thirty (30) days after the completion of a Business Combination. The parties hereto acknowledge that the Private Placement Units (including the underlying securities) held by the representatives of the underwriters of the Public Offering (the “Representatives”) are subject to the same Transfer restrictions pursuant to the terms of the Underwriting Agreement by and among the Company and the Representatives dated February 12, 2025.

(c) Notwithstanding the provisions set forth in paragraphs 6(a) and 6(b), Transfers of the Founder Shares (including the Class A Ordinary Shares issued or issuable upon the conversion of the Founder Shares) and Private Placement Units (and underlying securities) that are held by the Sponsor, Inflection Point, any Insider or any of their permitted transferees, as applicable (that have complied with any applicable requirements of this paragraph 6(c)), are permitted (i) to the Company’s or the Representatives’ officers, directors, advisors or consultants, any affiliate or family member of any of the Company’s or the Representatives’ officers, directors, any members or partners of the Sponsor or Inflection Point or their respective affiliates and funds and accounts advised by such members or partners, any affiliates of the Sponsor or Inflection Point, or any employees of such affiliates; (ii) in the case of an individual, as a gift to such person’s immediate family or to a trust, the beneficiary of which is a member of such person’s immediate family, an affiliate of such person or to a charitable organization; (iii) in the case of an individual, by virtue of laws of descent and distribution upon death of such person; (iv) in the case of an individual, pursuant to a qualified domestic relations order; (v) by private sales or Transfers made in connection with any forward purchase agreement or similar arrangement, in connection with an extension of the Completion Window or in connection with the consummation of a Business Combination at prices no greater than the price at which the shares or warrants were originally purchased; (vi) pro rata distributions from the Sponsor, Inflection Point, or the Representatives to their respective members, partners or shareholders pursuant to the Sponsor’s, Inflection Point’s, or the Representatives’ limited liability company agreement or other charter documents; (vii) by virtue of the laws of the jurisdiction of formation of Sponsor, Inflection Point or a Representative or the Sponsor’s, Inflection Point’s, or the Representative’s respective organizational documents upon dissolution of the Sponsor, Inflection Point, or such Representative, as applicable; (viii) in the event of the Company’s liquidation prior to consummation of a Business Combination; (ix) to a nominee or custodian of a person or entity to whom a Transfer would be permissible under clauses (i) through (vii); or (x) to the Company for cancellation; provided, however, that, in the case of clauses (i) through (vii) and (ix), these permitted transferees must enter into a written agreement agreeing to be bound by these Transfer restrictions herein and the other restrictions contained in this Letter Agreement (including provisions relating to voting, the Trust Account and liquidating distributions).

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[Signature Page to A&R Letter Agreement]

[Signature Page to A&R Letter Agreement]