SCHEDULE 13D 0001981748 XXXXXXXX LIVE Ordinary Shares 10/21/2025 false 0002026767 G1771C101 Calisa Acquisition Corp

205 W 37TH ST NEW YORK NY 10018

Na Gai 203-998-5540 205 W. 27th Street New York NY 10018 0001981748 N Gai Na WC N F4 1468975.00 0.00 1468975.00 0.00 1468975.00 N 17.4 IN Based on 8,427,500 of the Issuer's ordinary shares outstanding as of the date of this Schedule 13D. Ordinary Shares Calisa Acquisition Corp 205 W 37TH ST NEW YORK NY 10018 The reporting person is Na Gai. Ms. Gai's business address is c/o Calisa Acquisition Corp, 205 W. 37th Street, New York, New York 10018. Ms. Gai is a private investor. Ms. Gai has not been, during the last five years, convicted in a criminal proceeding (excluding traffic violations or similar misdemeanors). Ms. Gai has not, during the last five years, been a party to civil proceeding of a judicial administrative body of competent jurisdiction and, as a result of such proceeding, was, or is subject to, a judgment, decree or final order enjoining future violations of, or prohibiting or mandating activities subject to, Federal or state securities laws or finding any violation with respect to such laws. Ms. Gai is a citizen of the People's Republic of China. The source of the funds used by Ms. Gai to acquire the ordinary shares reported on in this Schedule 13D was working capital. See also Item 4 of this Schedule 13D, which information is incorporated herein by reference. On March 21, 2024, Alisa Group Limited ("Alisa"), a sponsor of the Issuer, acquired an aggregate of 1,155,750 ordinary shares (the "Founder Shares") from Calisa Holding LP. Ms. Gai made the acquisition reported in this Schedule 13D as a sponsor of the Issuer and in support of the Issuer's business plan. The Issuer's business plan is to enter into a merger, share exchange, asset acquisition, share purchase, recapitalization, reorganization or other similar business combination. In June 2025, the Issuer effected a 4-for-3 forward split of its outstanding shares resulting in such shares representing an aggregate of 1,541,000 Founder Shares (including up to 201,000 shares subject to forfeiture to the extent the over-allotment option granted to the underwriters in the IPO is not exercised in full). On October 23, 2025, in a private placement taking place simultaneously with the Issuer's initial public offering ("IPO"), Alisa purchased 128,975 units of the issuer ("Private Units"), each Private Unit consisting of one ordinary share and one right, each to receive one-tenth of one ordinary share upon completion of a business combination. The Private Units were purchased at a price of $10.00 per Private Unit, for an aggregate purchase price of $1,289,750. Ms. Gai is the sole director and shareholder of Alisa. On October 27, 2025, the underwriters in the IPO notified the Issuer that they were not exercising any portion of the over-allotment granted to them in the IPO. Accordingly, Alisa forfeited an aggregate of 201,000 Founder Shares on such date. Ms. Gai is the Chairman of the Board of Directors and Chief Executive Officer of the Issuer and has beneficial ownership of approximately 17.4% of the outstanding ordinary shares of the Issuer. Ms. Gai may later acquire additional securities of the Issuer. Any actions Ms. Gai might undertake with respect to the ordinary shares may be made at any time and from time to time without prior notice and will be dependent upon her review of numerous factors, including, but not limited to: an ongoing evaluation of the Issuer's business, financial condition, operations and prospects; price levels of the Issuer's securities; general market, industry and economic conditions; the relative attractiveness of alternative business and investment opportunities; and other future developments relating to her personally. As of the date of this Schedule 13D, except as set forth in this Schedule 13D above, Ms. Gai does not have any plans or proposals which would result in: (a) The acquisition by any person of additional securities of the Issuer, or the disposition of securities of the Issuer; (b) An extraordinary corporate transaction, such as a merger, reorganization or liquidation, involving the Issuer or any of its subsidiaries; (c) A sale or transfer of a material amount of assets of the Issuer or any of its subsidiaries; (d) Any change in the present board of directors or management of the Issuer, including any plans or proposals to change the number or term of the board of directors or management of the Issuer; (e) Any material change in the present capitalization or dividend policy of the Issuer; (f) Any other material change in the Issuer's business or corporate structure; (g) Changes in the Issuer's charter, bylaws or instruments corresponding thereto or other actions which ay impede the acquisition of control of the Issuer by any person; (h) Causing a class of securities of the Issuer to be delisted from a national securities exchange or to cease to be authorized to be quoted in an inter-dealer quotation system of a registered national securities association; (i) A class of equity securities of the Issuer becoming eligible for termination of registration pursuant to Section 12(g)(4) of the Act; or (j) Any action similar to any of those actions enumerated above. The aggregate number and percentage of ordinary shares beneficially owned by Ms. Gai are as follows: i. Sole power to vote or to direct the vote: 1,468,975 shares, 17.4% ii. Shared power to vote or to direct the vote: 0 shares iii. Sole power to dispose or to direct the disposition of: 1,468,975 shares, 17.4% iv. Shared power to dispose or to direct the disposition of: 0 shares The above amounts do not include shares issuable upon conversion of rights, which are not convertible within 60 days. During the 60 days preceding the date of this report, Ms. Gai has not effected any transactions in the Issuer's ordinary shares except as described in Item 4 above. Not applicable. Not applicable. Ms. Gai is the sole director and shareholder and of Alisa. Alisa is party to: (i) a Registration Rights Agreement, dated October 21, 2025, by and among the Issuer, the initial shareholders of the Issuer (including Alisa) and certain other parties thereto ("Registration Rights Agreement"), (ii) a Letter Agreement, dated October 21, 2025, by and among the Issuer, EarlyBirdCapital, Inc., Alisa and certain other parties thereto ("Insider Letter Agreement"), (iii) a Private Placement Units Purchase Agreement, dated October 23, 2025, by and between the Issuer and Alisa ("Private Placement Agreement"), and (iv) a Securities Escrow Agreement, dated October 21, 2025, by and among Issuer, Alisa and certain other parties thereto ("Securities Escrow Agreement"). Pursuant to the Registration Rights Agreement, the initial shareholders, including Alisa, and the other parties thereto are entitled to registration rights for the ordinary shares held by them immediately prior to the Issuer's IPO ("Initial Shares") in addition to certain other securities. The holders of a majority of these securities are entitled to make up to three demands that the Issuer register such securities. In addition, the holders have certain "piggy-back" registration rights with respect to registration statements filed subsequent to consummation of the Issuer's Business Combination. The Issuer will bear the expenses incurred in connection with the filing of any such registration statements. Pursuant to the Insider Letter Agreement, Alisa agreed, among other things, to vote all shares owned by it, subject to applicable securities laws, in favor of a proposed Business Combination, not to sell or transfer any Insider Shares, subject to certain exceptions, until certain periods of time set forth in the Insider Letter Agreement and that it would not seek redemption rights with respect to any Insider Shares. Pursuant to the Private Placement Agreement, Alisa, among other things, has agreed to purchase 128,75 units (or 138,169 units in aggregate to the extent the over-allotment option in connection with the IPO is exercised in full) of Issuer, each public unit consisting of one ordinary share of the Issuer and one right entitling the holder thereof to receive one-tenth of one share upon completion of the Business Combination. Pursuant to the Securities Escrow Agreement, Alisa agreed, among other things, to deposit its Founder Shares into escrow for the escrow period as set forth in the Securities Escrow Agreement. Registration Rights Agreement: https://www.sec.gov/Archives/edgar/data/2026767/000149315225018965/ex10-3.htm Insider Letter Agreement: https://www.sec.gov/Archives/edgar/data/2026767/000149315225018965/ex10-1.htm Private Placement Agreement: https://www.sec.gov/Archives/edgar/data/2026767/000149315225018965/ex10-4.htm Securities Escrow Agreement: https://www.sec.gov/Archives/edgar/data/2026767/000149315225018965/ex10-9.htm Gai Na /s/ Na Gai 10/27/2025