UNITED STATES

SECURITIES AND EXCHANGE COMMISSION

Washington, D.C. 20549

FORM 6-K

REPORT OF FOREIGN PRIVATE ISSUER

PURSUANT TO RULE 13a-16 OR 15d-16

UNDER THE SECURITIES EXCHANGE ACT OF 1934

For the month of April 2026

Commission File Number: 001-42461

SKYLINE BUILDERS GROUP HOLDING LIMITED

(Registrant’s Name)

Office A, 15/F, Tower A, Capital Tower,

No. 38 Wai Yip Street, Kowloon Bay, Hong Kong

(Address of Principal Executive Offices)

Indicate by check mark whether the registrant files or will file annual reports under cover Form 20-F or Form 40-F.

Form 20-F ☒      Form 40-F ☐

Information contained in this report

On April 30, 2026, Skyline Builders Group Holding Limited, a Cayman Islands exempted company with limited liability (the “Company” or “SKBL”), entered into a transaction agreement (the “Transaction Agreement”) with SKBL Merger Sub Inc., a Cayman Islands exempted company with limited liability (“SKBL Merger Sub”), Cove Kaz Capital Group LLC, a Delaware limited liability company (“Cove Kaz”), and Kaz Resources LLC, a Delaware limited liability company (“KRLLC”). Defined terms used in this report that are not otherwise defined shall have the meaning ascribed to them in the Transaction Agreement.

For the purpose of engaging in the transactions contemplated by the Transaction Agreement, (i) Cove Kaz incorporated SKBL Merger Sub, a newly incorporated Cayman Islands exempted company with limited liability that is wholly owned by Cove Kaz; and (ii) KRLLC will form AIFC NewCo as a newly incorporated private company in the Astana International Financial Centre (“AIFC NewCo”). KRLLC owns 100% of the issued and outstanding participatory interests (the “KCMLLP Interests”) in Kaz Critical Minerals LLP, a limited liability partnership incorporated and existing under the laws of Republic of Kazakhstan (“KCMLLP”). Prior to the Closing Date, and subject to the terms and conditions set forth in the Transaction Agreement, KCMLLP will merge with and into AIFC NewCo, with AIFC NewCo being the surviving entity in such merger.

Upon the terms and subject to the conditions of the Transaction Agreement, including receipt of requisite regulatory approvals: (a) KRLLC will distribute a percentage of the Equity Interest in AIFC NewCo equal to the fair market value of the KRLLC Redeemed Interests to SKBL in exchange for the redemption of all of the KRLLC Redeemed Interests, (b) Cove Kaz will convert its legal form from a Delaware limited liability company to a Delaware corporation (the “PubCo”), and change its corporate name to “Kaz Resources Inc.”, or such other name as may be agreed by the parties, (c) KRLLC will (i) sell its entire Equity Interest in AIFC NewCo to Cove Kaz, and (ii) contribute all of its rights and interests in and to the KRLLC Receivable to Cove Kaz, in each case, in exchange for newly issued shares of Pubco Class B Common Stock and the right to receive Earnout Shares, if and to the extent earned, in accordance with Section 2.11 of the Transaction Agreement and (d) at the SKBL Merger Effective Time, in accordance with the Companies Act (As Revised) of the Cayman Islands (the “Cayman Companies Act”), SKBL Merger Sub will merge with and into SKBL, as a result of which the separate corporate existence of SKBL Merger will cease and SKBL will continue as the surviving company in such merger (the “SKBL Merger”), and as a result of which each of the issued and outstanding SKBL Securities immediately prior to the SKBL Merger Effective Time shall no longer be outstanding and shall automatically be cancelled pursuant to the conversion as described below.

Effects of SKBL Merger

At the SKBL Merger Effective Time, by virtue of the SKBL Merger and without any action on the part of any Party or the holders of securities of SKBL or SKBL Merger Sub,

Representations, Warranties and Covenants

The parties to the Transaction Agreement have agreed to customary representations and warranties for transactions of this type. In addition, the parties to the Transaction Agreement agreed to be bound by certain customary covenants for transactions of this type, including, among others, covenants with respect to the conduct of the Company and its subsidiaries during the period between execution of the Transaction Agreement and the Closing. Each of the parties to the Transaction Agreement has agreed to use its reasonable best efforts to take, or cause to be taken, all action, and to do, or cause to be done, all things as are necessary, proper or advisable under applicable laws or otherwise, and each shall cooperate with the other, to consummate the transactions as promptly as reasonably practicable.

Conditions to Closing

The obligations of each Party to consummate the Transactions at the Closing are subject to the satisfaction (or waiver by SKBL and Cove Kaz) of certain conditions, including, among others:

The obligations of SKBL to consummate the Transactions are subject to the satisfaction (or waiver by SKBL) of certain conditions, including, among others:

The obligations of Cove Kaz, KRLLC and SKBL Merger Sub to consummate the Transactions are subject to the satisfaction (or waiver by Cove Kaz and KRLLC) of certain conditions, including, among others:

Termination

The Transaction Agreement may be terminated under certain customary circumstances prior to the closing of the Transaction, including but not limited to:

The foregoing description of the Transaction Agreement does not purport to be complete and is qualified in its entirety by the terms and conditions of the actual agreement, a copy of which is filed as Exhibit 2.1 hereto.

Related Agreements

Support Agreement

Concurrently with the execution of the Transaction Agreement, certain shareholders of SKBL have executed and delivered to Cove Kaz, support agreements, pursuant to which, among other things, (i) such shareholders have agreed to vote to approve the Transaction Agreement and in favor of the transactions contemplated thereby, including the SKBL Merger and (ii) certain of such shareholders have agreed to certain limitations on the transfer of their respective shares of SKBL Securities.

The foregoing description of the Support Agreements do not purport to be complete and is qualified in its entirety by the terms and conditions of the actual agreements, copies of which are filed as Exhibit 10.1 hereto.

Amendment to Executive Employment Agreement

On April 30, 2026, SKBL and Paul Mann (the “Executive”) entered into an amendment to the Executive Employment Agreement between SKBL and the Executive dated November 5, 2025 (the “November EA”). The amendment, which will become effective upon the closing of the transactions contemplated by the Transaction Agreement, provides for the termination of the Executive’s November EA effective as of the closing of the Transaction in exchange for the accelerated vesting of all outstanding unvested equity awards effective as of the closing and the award of 3,000,000 SKBL Class A Ordinary Shares to the Executive.

Loan Agreement

On April 22, 2026, SKBL also entered into a loan agreement (the “Loan Agreement”) with Cove Kaz, pursuant to which SKBL provided a loan to Cove Kaz in the sum of $23,100,000 (the “Principal”), which shall be repaid to SKBL with simple interest accrued on the Principal at a rate equal to 10% per annum from the date of this loan until the Principal and all interest accrued thereon is paid (or converted, as provided in the Loan Agreement).

The foregoing description of the Loan Agreements do not purport to be complete and is qualified in its entirety by the terms and conditions of the actual agreements, copies of which are filed as Exhibit 10.2 hereto.

Investor Deck

An investors deck that will be used by SKBL and Cove Kaz in connection with the proposed transactions is being furnished as Exhibit 99.1 hereto.

Important Notice Regarding Forward-Looking Statements

This Current Report on Form 6-K contains certain statements that are not historical facts and are forward-looking statements within the meaning of the federal securities laws with respect to the proposed transactions among SKBL, SKBL Merger Sub, Cove Kaz, and KRLLC, including without limitation statements regarding the anticipated benefits of the proposed transactions, the anticipated timing of the proposed transactions, the implied enterprise value, future financial condition and performance of the combined company after the Closing and expected financial impacts of the proposed transactions, the satisfaction of closing conditions to the proposed transactions, and the products and markets and expected future performance and market opportunities of the combined company. These forward-looking statements generally are identified by the words “believe,” “project,” “expect,” “anticipate,” “estimate,” “intend,” “think,” “strategy,” “future,” “opportunity,” “potential,” “plan,” “seeks,” “may,” “should,” “will,” “would,” “will be,” “will continue,” “will likely result,” and similar expressions, but the absence of these words does not mean that a statement is not forward-looking. Forward-looking statements are predictions, projections and other statements about future events that are based on current expectations and assumptions and, as a result, are subject to risks and uncertainties.

These forward-looking statements are provided for illustrative purposes only and are not intended to serve as, and must not be relied on as, a guarantee, an assurance, a prediction or a definitive statement of fact or probability. Actual events and circumstances are difficult or impossible to predict and will differ from assumptions. Many factors could cause actual future events to differ materially from the forward-looking statements in this communication, including but not limited to: (i) the risk that the proposed transactions may not be completed in a timely manner or at all, which may adversely affect the price of SKBL’s securities; (ii) the failure to satisfy the conditions to the consummation of the proposed transactions, including the approval of the Transaction Agreement by the shareholders of SKBL, the satisfaction of the closing requirements and the receipt of certain governmental, regulatory and third party approvals; (iii) the occurrence of any event, change or other circumstance that could give rise to the termination of the Transaction Agreement; (iv) the failure to meet Nasdaq listing standards in connection with the consummation of the proposed transactions; (v) the anticipated tax treatment of the proposed transactions may not be obtained; (vi) the effect of the announcement or pendency of the proposed transactions on the SKBL’s and Cove Kaz’s business relationships, operating results, and business generally; (vii) risks that the proposed transactions disrupt current plans and operations of SKBL and Cove Kaz; (viii) the outcome of any legal proceedings that may be instituted against SKBL, PubCo, Cove Kaz or KRLLC related to the Transaction Agreement or the proposed transactions; (ix) changes in the markets in which each of SKBL and Cove Kaz competes, including with respect to its competitive landscape, technology evolution, or regulatory changes; (x) changes in domestic and global general economic conditions, including fluctuations in commodity prices; (xi) the risk that PubCo may not be able to execute its growth strategies; (xii) permitting, development, operations and expansion of PubCo’s operations and projects being inconsistent with current expectations and mine plans; (xiii) the accuracy of current mineral reserve, mineral resource and mineralized material estimates; (xiv) the inherent uncertainty associated with financial or other projections; (xv) risks related to supply chain disruptions; (xvi) the risk that PubCo may not be able to develop and maintain effective internal controls; (xvii) costs related to the proposed transactions and the failure to realize anticipated benefits of the proposed transactions or to realize estimated pro forma results and underlying assumptions, including the potential impact of unforeseen liabilities, future capital expenditures, revenues, expenses, earnings, synergies, economic performance, indebtedness, financial condition and losses on future prospects, business and management strategies, expansion and growth of the combined business after the consummation of the proposed transactions; (xviii) the ability to achieve commercialization and development plans, and identify and realize additional opportunities, which may be affected by, among other things, competition, the ability of PubCo to grow and manage growth economically and hire and retain key employees; (xix) the inability to secure intellectual property rights or to obtain licensing of third-party intellectual property rights for future discovery and development of PubCo’s projects; (xx) the risk that PubCo will need to raise additional capital to execute its business plan, which may not be available on acceptable terms or at all; and (xxi) those factors discussed in SKBL’s and PubCo’s filings with the SEC and that will be contained in the Registration Statement relating to the proposed transactions.

The foregoing list of factors is not exhaustive. You should carefully consider the foregoing factors and the other risks and uncertainties that will be described in the “Risk Factors” section of the Registration Statement on Form S-4 (the “Registration Statement”) and the amendments thereto, and other documents to be filed by SKBL and PubCo from time to time with the SEC. These filings identify and address other important risks and uncertainties that could cause actual events and results to differ materially from those contained in the forward-looking statements. Forward-looking statements speak only as of the date they are made. Readers are cautioned not to put undue reliance on forward-looking statements, and while PubCo and SKBL may elect to update these forward-looking statements at some point in the future, they assume no obligation to update or revise these forward-looking statements, whether as a result of new information, future events or otherwise, except as required by applicable law. None of PubCo, Cove Kaz, KRLLC or SKBL gives any assurance that PubCo, Cove Kaz, KRLLC or SKBL will achieve expectations. These forward-looking statements should not be relied upon as representing PubCo’s, SKBL’s, Cove Kaz’s or KRLLC’s assessments as of any date subsequent to the date of this Current Report. Accordingly, undue reliance should not be placed upon the forward-looking statements.

Additional Information and Where to Find It

In connection with the Transaction Agreement and the proposed transactions, PubCo intends to file relevant materials with the SEC, including the Registration Statement, which will include a prospectus for the registration of Pubco securities in connection with the proposed transactions.

THE PARTIES URGE THEIR INVESTORS, SHAREHOLDERS, AND OTHER INTERESTED PERSONS TO READ, WHEN AVAILABLE, THE REGISTRATION STATEMENT/PROSPECTUS, IN EACH CASE WHEN FILED WITH THE SEC AND DOCUMENTS INCORPORATED BY REFERENCE THEREIN BECAUSE THESE DOCUMENTS WILL CONTAIN IMPORTANT INFORMATION ABOUT SKBL, SKBL MERGER SUB, COVE KAZ, KRLLC, PUBCO, AND THE PROPOSED TRANSACTIONS. Shareholders of SKBL and other interested persons are advised to read, when available, these materials (including any amendments or supplements thereto) and any other relevant documents in connection with the proposed transactions, because they will contain important information about SKBL, SKBL Merger Sub, Cove Kaz, KRLLC and the proposed transactions. Shareholders and other interested persons will also be able to obtain copies of the registration statement/prospectus and other relevant materials in connection with the proposed transactions, without charge, once available, at the SEC’s website at www.sec.gov or by directing a request to: Skyline Builders Group Holding Limited, Office A, 15/F, Tower A, Capital Tower, No. 38 Wai Yip Street, Kowloon Bay, Hong Kong, telephone: +852-2811-9688 or to Cove Kaz Capital Group LLC at info@kazresources.com. The information contained on, or that may be accessed through, the websites referenced in this Form 6-K in each case is not incorporated by reference into, and is not a part of, this Form 6-K.

No Offer or Solicitation

This Current Report on Form 6-K is not a proxy statement or solicitation of a proxy, consent or authorization with respect to any securities or in respect of the proposed transactions contemplated by the Transaction Agreement and shall not constitute an offer to sell or a solicitation of an offer to buy any securities, or a solicitation of any vote or approval, nor shall there be any sale of securities in any state or jurisdiction in which such offer, solicitation, or sale would be unlawful prior to registration or qualification under the securities laws of any such state or jurisdiction. No offer of securities shall be made except by means of a prospectus meeting the requirements of the Securities Act of 1933, as amended, or an exemption therefrom.

EXHIBIT INDEX

SIGNATURES

Pursuant to the requirements of the Securities Exchange Act of 1934, the registrant has duly caused this report to be signed on its behalf by the undersigned, thereunto duly authorized.

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