Organization and Plan of Business Operations	12 Months Ended
Dec. 31, 2025
Organization and Plan of Business Operations [Abstract]
ORGANIZATION AND PLAN OF BUSINESS OPERATIONS	NOTE 1 — ORGANIZATION AND PLAN OF BUSINESS OPERATIONS Helix Acquisition Corp. III (the “Company”) is a blank check company incorporated as a Cayman Islands exempted company on September 10, 2025. The Company was incorporated for the purpose of effecting a merger, share exchange, asset acquisition, share purchase, reorganization or similar business combination with one or more businesses or entities (a “Business Combination”). The Company will have 24 months from the closing of the initial public offering (the “Initial Public Offering”) to complete the initial Business Combination (the “Completion Window”). The Company has not selected any specific Business Combination target and the Company has not, nor has anyone on its behalf, engaged in any substantive discussions, directly or indirectly, with any business combination target with respect to an initial business combination with the Company. As of December 31, 2025, the Company had not commenced any operations. All activity for the period from September 10, 2025 (inception) through December 31, 2025 relates to the Company’s formation, the Initial Public Offering (as described below), and subsequent to the Initial Public Offering, identifying a target company for a Business Combination. The Company will not generate any operating revenues until after the completion of a Business Combination, at the earliest. The Company will generate non-operating income in the form of interest and/or dividend income from the proceeds derived from the Initial Public Offering. The Company has selected December 31 as its fiscal year end. The Company’s Sponsor is Helix Holdings III LLC (the “Sponsor”). The registration statement for the Company’s Initial Public Offering was declared effective on January 22, 2026. On January 26, 2026, the Company consummated the Initial Public Offering of 17,250,000 Class A ordinary shares (the “Public Shares”), which includes the full exercise by the underwriters of their over-allotment option of 2,250,000 Public Shares, at $10.00 per Public Share, generating gross proceeds of $172,500,000. Simultaneously with the closing of the Initial Public Offering, the Company consummated the sale of an aggregate of 497,500 private placement shares (each “Private Placement Share”, collectively the “Private Placement Shares”) to the Sponsor at a price of $10.00 per Private Placement Share, generating gross proceeds of $4,975,000. Transaction costs amounted to $7,505,053, consisting of $1,725,000 of cash underwriting fees, $5,175,000 of deferred underwriting fees, and $605,053 of other offering costs. Following the closing of the Initial Public Offering, on January 26, 2026, an amount of $172,500,000 ($10.00 per Public Share) from the net proceeds of the sale of the Public Shares and the Private Placement Shares was placed in a U.S.-based trust account (the “Trust Account”), with Continental Stock Transfer & Trust Company, acting as trustee. The funds may be held in cash or invested in U.S. government treasury obligations with a maturity of 185 days or less or in money market funds meeting certain conditions under Rule 2a-7 under the Investment Company Act, which invest only in direct U.S. government treasury obligations, as determined by the Company, until the earliest of (i) the completion of a Business Combination and (ii) the distribution of the funds in the Trust Account to the Company’s shareholders, as described below. The Company’s management has broad discretion with respect to the specific application of the net proceeds of the Initial Public Offering and the sale of the Private Placement Shares, although substantially all of the net proceeds are intended to be applied generally toward consummating a Business Combination. The rules of Nasdaq require that the Company must complete one or more business combinations having an aggregate fair market value of at least 80% of the value of the assets held in the Trust Account (excluding the deferred underwriting commissions and taxes payable on the interest earned on the Trust Account) at the time of the agreement to enter into the initial Business Combination. The Company anticipates structuring the initial Business Combination so that the post transaction company in which the holders of the Public Shares (the “Public Shareholders”) own shares will own or acquire 100% of the equity interests or assets of the target business or businesses. The Company may, however, structure the initial Business Combination such that the post transaction company owns or acquires less than 100% of such interests or assets of the target business in order to meet certain objectives of the target management team or shareholders or for other reasons, but the Company will only complete such Business Combination if the post transaction company owns or acquires 50% or more of the issued and outstanding voting securities of the target or otherwise acquires a controlling interest in the target business sufficient for it not to be required to register as an investment company under the Investment Company Act of 1940, as amended (the “Investment Company Act”). There is no assurance that the Company will be able to successfully effect a Business Combination. The Company will provide the Public Shareholders with the opportunity to redeem all or a portion of their Public Shares in connection with the completion of the Business Combination, either (i) in connection with a general meeting called to approve the Business Combination or (ii) without a shareholder vote by means of a tender offer. The decision as to whether the Company will seek shareholder approval of a Business Combination or conduct a tender offer will be made by the Company, solely in its discretion. The Public Shareholders will be entitled to redeem their Public Shares, equal to the aggregate amount then on deposit in the Trust Account, calculated as of two business days prior to the consummation of the Business Combination (initially anticipated to be $10.00 per Public Share), including interest (less taxes paid or payable (other than excise or similar taxes) and up to $100,000 of interest to pay dissolution expenses), divided by the number of then issued and outstanding Public Shares, subject to certain limitations as described in the Company’s prospectus. The per-share amount to be distributed to the Public Shareholders who properly redeem their Public Shares will not be reduced by the deferred underwriting commissions the Company will pay to the underwriters (as discussed in Note 6). The Public Shares are be recorded at redemption value and classified as temporary equity upon the completion of the Initial Public Offering, in accordance with Financial Accounting Standards Board (“FASB”) Accounting Standards Codification (“ASC”) Topic 480, “Distinguishing Liabilities from Equity.” Notwithstanding the foregoing, if the Company seeks shareholder approval of the Business Combination and the Company does not conduct redemptions pursuant to the tender offer rules, a Public Shareholder, together with any affiliate of such shareholder or any other person with whom such shareholder is acting in concert or as a “group” (as defined under Section 13 of the Securities Exchange Act of 1934, as amended (the “Exchange Act”)), will be restricted from redeeming its shares with respect to more than an aggregate of 20% of the Public Shares without the Company’s prior written consent. The Sponsor, officers and directors have entered into a letter agreement with the Company, pursuant to which they have agreed to (i) waive their redemption rights with respect to the Class B ordinary shares, par value $0.0001 per share (the “founder shares”), Private Placement Shares and any Public Shares they may acquire during or after the Initial Public Offering in connection with the completion of the initial Business Combination or an earlier redemption in connection with the commencement of the procedures to consummate the initial Business Combination if the Company determines that it is desirable to facilitate the completion of the initial Business Combination; (ii) waive their redemption rights with respect to the founder shares, Private Placement Shares and any Public Shares they may acquire during or after the Initial Public Offering in connection with a shareholder vote to approve an amendment to the articles (A) to modify the substance or timing of the obligation to allow redemption in connection with the initial Business Combination or to redeem 100% of the Public Shares if the Company has not consummated an initial Business Combination within the Completion Window or (B) with respect to any other material provisions relating to shareholders’ rights or pre-initial Business Combination activity; (iii) waive their rights to liquidating distributions from the Trust Account with respect to the founder shares and Private Placement Shares if the Company fails to complete the initial Business Combination within the Completion Window, although they will be entitled to liquidating distributions from assets outside the Trust Account with respect to any Public Shares they hold if the Company fails to complete the initial Business Combination within the prescribed time frame and to liquidating distributions from assets outside the Trust Account; and (iv) vote any founder shares, Private Placement Shares held by them, and any Public Shares purchased during or after the Initial Public Offering (including in open market and privately-negotiated transactions) in favor of the initial Business Combination. If the Company submits the initial Business Combination to the public shareholders for a vote, the Company will complete the initial Business Combination only if it is approved by an ordinary resolution under Cayman Islands law, being the affirmative vote of at least a majority of the holders of the shares present in person or by proxy and entitled to vote thereon at a general meeting of the Company. The Company will have until (i) the period ending on the date that is 24 months from the closing of the Initial Public Offering, or such earlier liquidation as the Company’s board of directors may approve, in which the Company must complete an Initial Business Combination or (ii) such other time period in which the Company must complete an initial business combination pursuant to an amendment to the articles of the Company. However, if the Company has not completed a Business Combination within the Completion Window, the Company will as promptly as reasonably possible but not more than ten business days thereafter, redeem 100% of the Public Shares, at a per-share price, payable in cash, equal to the aggregate amount then on deposit in the Trust Account, including interest earned on the funds held in the Trust Account (less taxes paid or payable (other than excise or similar taxes) and up to $100,000 of interest to pay liquidation expenses), divided by the number of then issued and outstanding Public Shares, which redemption will constitute full and complete payment for the Public Shares and completely extinguish the rights of the Public Shareholders as shareholders (including the right to receive further liquidation or other distributions, if any), subject to the Company’s obligations under Cayman Islands law to provide for claims of creditors and subject to the other requirements of applicable law. The Sponsor, officers, directors, and advisors have agreed to waive their rights to liquidating distributions from the Trust Account with respect to the founder shares they hold if the Company fails to complete a Business Combination within the Completion Window. However, if the Sponsor, officers, directors, and advisors or any of their respective affiliates acquire Public Shares, such Public Shares will be entitled to liquidating distributions from the Trust Account if the Company fails to complete a Business Combination within the Completion Window. The underwriters have agreed to waive its rights to its deferred underwriting commissions (see Note 6) held in the Trust Account in the event the Company does not complete a Business Combination within the Completion Window, and in such event, such amounts will be included with the other funds held in the Trust Account that will be available to fund the redemption of the Public Shares. In the event of such distribution, it is possible that the per share value of the assets remaining available for distribution will be less than the Initial Public Offering price per Public Share ($10.00). In order to protect the amounts held in the Trust Account, the Sponsor has agreed that it will be liable to the Company if and to the extent any claims by a third party (other than the Company’s independent registered public accounting firm) for services rendered or products sold to the Company, or a prospective target business with which the Company has discussed entering into a transaction agreement, reduce the amount of funds in the Trust Account to below the lesser of (1) $10.00 per Public Share (2) the actual amount per Public Share held in the Trust Account as of the date of the liquidation of the Trust Account, if less than $10.00 per Public Share, due to reductions in the value of trust assets, less taxes paid or payable (other than excise or similar taxes) and up to $100,000 of interest to pay dissolution expenses, provided that this liability will not apply to any claims by a third party who executed a waiver of any and all rights to seek access to the Trust Account and as to any claims under the Company’s indemnity of the underwriters of the Initial Public Offering against certain liabilities, including liabilities under the Securities Act of 1933, as amended (the “Securities Act”). In the event that an executed waiver is deemed to be unenforceable against a third party, the Sponsor will not be responsible to the extent of any liability for such third-party claims. The Company will seek to reduce the possibility that the Sponsor will have to indemnify the Trust Account due to claims of creditors by endeavoring to have all vendors, service providers (other than the Company’s independent registered public accounting firm), prospective target businesses or other entities with which the Company does business, execute agreements with the Company waiving any right, title, interest or claim of any kind in or to monies held in the Trust Account.

Organization and Plan of Business Operations

12 Months Ended

Dec. 31, 2025

Organization and Plan of Business Operations [Abstract]

ORGANIZATION AND PLAN OF BUSINESS OPERATIONS

NOTE 1 — ORGANIZATION AND PLAN OF BUSINESS OPERATIONS

Helix Acquisition Corp. III (the “Company”) is a blank check company incorporated as a Cayman Islands exempted company on September 10, 2025. The Company was incorporated for the purpose of effecting a merger, share exchange, asset acquisition, share purchase, reorganization or similar business combination with one or more businesses or entities (a “Business Combination”). The Company will have 24 months from the closing of the initial public offering (the “Initial Public Offering”) to complete the initial Business Combination (the “Completion Window”). The Company has not selected any specific Business Combination target and the Company has not, nor has anyone on its behalf, engaged in any substantive discussions, directly or indirectly, with any business combination target with respect to an initial business combination with the Company.

As of December 31, 2025, the Company had not commenced any operations. All activity for the period from September 10, 2025 (inception) through December 31, 2025 relates to the Company’s formation, the Initial Public Offering (as described below), and subsequent to the Initial Public Offering, identifying a target company for a Business Combination. The Company will not generate any operating revenues until after the completion of a Business Combination, at the earliest. The Company will generate non-operating income in the form of interest and/or dividend income from the proceeds derived from the Initial Public Offering. The Company has selected December 31 as its fiscal year end.

The Company’s Sponsor is Helix Holdings III LLC (the “Sponsor”). The registration statement for the Company’s Initial Public Offering was declared effective on January 22, 2026. On January 26, 2026, the Company consummated the Initial Public Offering of 17,250,000 Class A ordinary shares (the “Public Shares”), which includes the full exercise by the underwriters of their over-allotment option of 2,250,000 Public Shares, at $10.00 per Public Share, generating gross proceeds of $172,500,000.

Simultaneously with the closing of the Initial Public Offering, the Company consummated the sale of an aggregate of 497,500 private placement shares (each “Private Placement Share”, collectively the “Private Placement Shares”) to the Sponsor at a price of $10.00 per Private Placement Share, generating gross proceeds of $4,975,000.

Transaction costs amounted to $7,505,053, consisting of $1,725,000 of cash underwriting fees, $5,175,000 of deferred underwriting fees, and $605,053 of other offering costs.

Following the closing of the Initial Public Offering, on January 26, 2026, an amount of $172,500,000 ($10.00 per Public Share) from the net proceeds of the sale of the Public Shares and the Private Placement Shares was placed in a U.S.-based trust account (the “Trust Account”), with Continental Stock Transfer & Trust Company, acting as trustee. The funds may be held in cash or invested in U.S. government treasury obligations with a maturity of 185 days or less or in money market funds meeting certain conditions under Rule 2a-7 under the Investment Company Act, which invest only in direct U.S. government treasury obligations, as determined by the Company, until the earliest of (i) the completion of a Business Combination and (ii) the distribution of the funds in the Trust Account to the Company’s shareholders, as described below.

The Company’s management has broad discretion with respect to the specific application of the net proceeds of the Initial Public Offering and the sale of the Private Placement Shares, although substantially all of the net proceeds are intended to be applied generally toward consummating a Business Combination. The rules of Nasdaq require that the Company must complete one or more business combinations having an aggregate fair market value of at least 80% of the value of the assets held in the Trust Account (excluding the deferred underwriting commissions and taxes payable on the interest earned on the Trust Account) at the time of the agreement to enter into the initial Business Combination. The Company anticipates structuring the initial Business Combination so that the post transaction company in which the holders of the Public Shares (the “Public Shareholders”) own shares will own or acquire 100% of the equity interests or assets of the target business or businesses. The Company may, however, structure the initial Business Combination such that the post transaction company owns or acquires less than 100% of such interests or assets of the target business in order to meet certain objectives of the target management team or shareholders or for other reasons, but the Company will only complete such Business Combination if the post transaction company owns or acquires 50% or more of the issued and outstanding voting securities of the target or otherwise acquires a controlling interest in the target business sufficient for it not to be required to register as an investment company under the Investment Company Act of 1940, as amended (the “Investment Company Act”). There is no assurance that the Company will be able to successfully effect a Business Combination.

The Company will provide the Public Shareholders with the opportunity to redeem all or a portion of their Public Shares in connection with the completion of the Business Combination, either (i) in connection with a general meeting called to approve the Business Combination or (ii) without a shareholder vote by means of a tender offer. The decision as to whether the Company will seek shareholder approval of a Business Combination or conduct a tender offer will be made by the Company, solely in its discretion. The Public Shareholders will be entitled to redeem their Public Shares, equal to the aggregate amount then on deposit in the Trust Account, calculated as of two business days prior to the consummation of the Business Combination (initially anticipated to be $10.00 per Public Share), including interest (less taxes paid or payable (other than excise or similar taxes) and up to $100,000 of interest to pay dissolution expenses), divided by the number of then issued and outstanding Public Shares, subject to certain limitations as described in the Company’s prospectus. The per-share amount to be distributed to the Public Shareholders who properly redeem their Public Shares will not be reduced by the deferred underwriting commissions the Company will pay to the underwriters (as discussed in Note 6). The Public Shares are be recorded at redemption value and classified as temporary equity upon the completion of the Initial Public Offering, in accordance with Financial Accounting Standards Board (“FASB”) Accounting Standards Codification (“ASC”) Topic 480, “Distinguishing Liabilities from Equity.”

Notwithstanding the foregoing, if the Company seeks shareholder approval of the Business Combination and the Company does not conduct redemptions pursuant to the tender offer rules, a Public Shareholder, together with any affiliate of such shareholder or any other person with whom such shareholder is acting in concert or as a “group” (as defined under Section 13 of the Securities Exchange Act of 1934, as amended (the “Exchange Act”)), will be restricted from redeeming its shares with respect to more than an aggregate of 20% of the Public Shares without the Company’s prior written consent.

The Sponsor, officers and directors have entered into a letter agreement with the Company, pursuant to which they have agreed to (i) waive their redemption rights with respect to the Class B ordinary shares, par value $0.0001 per share (the “founder shares”), Private Placement Shares and any Public Shares they may acquire during or after the Initial Public Offering in connection with the completion of the initial Business Combination or an earlier redemption in connection with the commencement of the procedures to consummate the initial Business Combination if the Company determines that it is desirable to facilitate the completion of the initial Business Combination; (ii) waive their redemption rights with respect to the founder shares, Private Placement Shares and any Public Shares they may acquire during or after the Initial Public Offering in connection with a shareholder vote to approve an amendment to the articles (A) to modify the substance or timing of the obligation to allow redemption in connection with the initial Business Combination or to redeem 100% of the Public Shares if the Company has not consummated an initial Business Combination within the Completion Window or (B) with respect to any other material provisions relating to shareholders’ rights or pre-initial Business Combination activity; (iii) waive their rights to liquidating distributions from the Trust Account with respect to the founder shares and Private Placement Shares if the Company fails to complete the initial Business Combination within the Completion Window, although they will be entitled to liquidating distributions from assets outside the Trust Account with respect to any Public Shares they hold if the Company fails to complete the initial Business Combination within the prescribed time frame and to liquidating distributions from assets outside the Trust Account; and (iv) vote any founder shares, Private Placement Shares held by them, and any Public Shares purchased during or after the Initial Public Offering (including in open market and privately-negotiated transactions) in favor of the initial Business Combination. If the Company submits the initial Business Combination to the public shareholders for a vote, the Company will complete the initial Business Combination only if it is approved by an ordinary resolution under Cayman Islands law, being the affirmative vote of at least a majority of the holders of the shares present in person or by proxy and entitled to vote thereon at a general meeting of the Company.

The Company will have until (i) the period ending on the date that is 24 months from the closing of the Initial Public Offering, or such earlier liquidation as the Company’s board of directors may approve, in which the Company must complete an Initial Business Combination or (ii) such other time period in which the Company must complete an initial business combination pursuant to an amendment to the articles of the Company. However, if the Company has not completed a Business Combination within the Completion Window, the Company will as promptly as reasonably possible but not more than ten business days thereafter, redeem 100% of the Public Shares, at a per-share price, payable in cash, equal to the aggregate amount then on deposit in the Trust Account, including interest earned on the funds held in the Trust Account (less taxes paid or payable (other than excise or similar taxes) and up to $100,000 of interest to pay liquidation expenses), divided by the number of then issued and outstanding Public Shares, which redemption will constitute full and complete payment for the Public Shares and completely extinguish the rights of the Public Shareholders as shareholders (including the right to receive further liquidation or other distributions, if any), subject to the Company’s obligations under Cayman Islands law to provide for claims of creditors and subject to the other requirements of applicable law.

The Sponsor, officers, directors, and advisors have agreed to waive their rights to liquidating distributions from the Trust Account with respect to the founder shares they hold if the Company fails to complete a Business Combination within the Completion Window. However, if the Sponsor, officers, directors, and advisors or any of their respective affiliates acquire Public Shares, such Public Shares will be entitled to liquidating distributions from the Trust Account if the Company fails to complete a Business Combination within the Completion Window. The underwriters have agreed to waive its rights to its deferred underwriting commissions (see Note 6) held in the Trust Account in the event the Company does not complete a Business Combination within the Completion Window, and in such event, such amounts will be included with the other funds held in the Trust Account that will be available to fund the redemption of the Public Shares. In the event of such distribution, it is possible that the per share value of the assets remaining available for distribution will be less than the Initial Public Offering price per Public Share ($10.00).

In order to protect the amounts held in the Trust Account, the Sponsor has agreed that it will be liable to the Company if and to the extent any claims by a third party (other than the Company’s independent registered public accounting firm) for services rendered or products sold to the Company, or a prospective target business with which the Company has discussed entering into a transaction agreement, reduce the amount of funds in the Trust Account to below the lesser of (1) $10.00 per Public Share (2) the actual amount per Public Share held in the Trust Account as of the date of the liquidation of the Trust Account, if less than $10.00 per Public Share, due to reductions in the value of trust assets, less taxes paid or payable (other than excise or similar taxes) and up to $100,000 of interest to pay dissolution expenses, provided that this liability will not apply to any claims by a third party who executed a waiver of any and all rights to seek access to the Trust Account and as to any claims under the Company’s indemnity of the underwriters of the Initial Public Offering against certain liabilities, including liabilities under the Securities Act of 1933, as amended (the “Securities Act”). In the event that an executed waiver is deemed to be unenforceable against a third party, the Sponsor will not be responsible to the extent of any liability for such third-party claims. The Company will seek to reduce the possibility that the Sponsor will have to indemnify the Trust Account due to claims of creditors by endeavoring to have all vendors, service providers (other than the Company’s independent registered public accounting firm), prospective target businesses or other entities with which the Company does business, execute agreements with the Company waiving any right, title, interest or claim of any kind in or to monies held in the Trust Account.