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Stockholders’ Equity | 9 Months Ended
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Sep. 30, 2025
Equity [Abstract] |
Stockholders’ Equity | Note 9 – Stockholders’ Equity Stock Transactions On October 25, 2022, in connection with the approval of the Business Combination, the Company’s stockholders approved the Cardio Diagnostics Holdings, Inc. 2022 Equity Incentive Plan (the “2022 Plan”). The purpose of the 2022 Plan is to promote the interests of the Company and its stockholders by providing eligible employees, officers, directors and consultants with additional incentives to remain with the Company and its subsidiaries, to increase their efforts to make the Company more successful, to reward such persons by providing an opportunity to acquire shares of Common Stock on favorable terms and to attract and retain the best available personnel to participate in the ongoing business operations of the Company. The 2022 Plan permits the grant of Incentive Stock Options, Nonstatutory Stock Options, Restricted Stock, Restricted Stock Units, Stock Appreciation Rights, Performance Units and Performance Shares. The 2022 Plan, as approved, permits the issuance of up to 108,851 shares (3,265,516 prior to the Reverse Stock Split) of Common Stock (the “Share Reserve”) upon exercise or conversion of grants and awards made from time to time to officers, directors, employees and consultants, however that the Share Reserve will increase on January 1st of each calendar year and ending on and including January 1, 2027 (each, an “Evergreen Date”), in an amount equal to the lesser of (i) 7% of the total number of shares of Common Stock outstanding on the December 31st immediately preceding the applicable Evergreen Date and (ii) such lesser number of shares of Common Stock as determined to be appropriate by the Compensation Committee, which administers the 2022 Plan, in its sole discretion. In January 2024, the Compensation Committee approved an annual increase in the Share Reserve of 35,349 shares (1,060,458 prior to the Reverse Stock Split). On March 31, 2025, the Compensation Committee approved an increase in the Share Reserve of 95,721 shares (2,871,638 prior to the Reverse Stock Split). Common Stock Issued Private Placement On February 2, 2024 (pre-dating the 1-for-30 reverse stock split effected in May 2025), in accordance with executed subscription agreements with seven accredited investors (the “Subscription Agreements”), the Company closed on the sale of 561,793 units (the “Units”), with each Unit consisting of (i) one share of the Company’s common stock, $0.00001 par value (the “Common Stock”) and (ii) one six year Common Stock purchase warrant (the “Warrants”), which warrants are exercisable until February 2, 2030 at an exercise price of $1.78 ($53.40 on a post-reverse stock split basis) per share, subject to adjustment for stock splits, reverse stock splits and other similar events of recapitalization, including the 1-for-30 reverse stock split the Company effected on May 12, 2025. The Units were sold to the investors in a private placement at a sale price of $1.78 ($53.40 on a post-reverse stock split basis) per Unit (the “Private Placement”), resulting in gross proceeds to the Company of $1,000,000, before deducting placement agent fees (10% or $100,000) and other offering expenses. The Company used the net proceeds from the Private Placement for working capital and general corporate purposes. On a post-reverse stock split basis, the Company issued 18,727 shares and warrants that are exercisable for 18,727 shares, all at an exercise price of $53.40 per share, during the nine months ended September 30, 2024. In connection with the Private Placement, the Company entered into a Placement Agent Agreement with Altitude Capital Group, LLC, as placement agent (“Altitude Capital” or the “Placement Agent”). The Company’s Non-Executive Chairman of the Board owns 10% of Altitude Capital. Pursuant to the Placement Agent Agreement, at closing, Altitude Capital was paid a cash commission equal to 10% of the gross proceeds received by the Company, plus 20% warrant coverage, providing Altitude Capital with the right to purchase 3,745 shares (112,353 prior to the Reverse Stock Split) of Common Stock at $53.40 per share ($1.78 prior to the Reverse Stock Split) through February 2, 2030 (the “Placement Agent Warrants”). At-the-Market Issuance In connection with an At-the-Market Issuance Sales Agreement (the “Sales Agreement”) that the Company entered into with a placement agent on January 26, 2024, the Company sold 233,051 shares on the post-reverse stock split basis (which includes 206,713 shares that were sold prior to the Reverse Stock Split, originally 6,201,377 shares) of Common Stock at various amounts per share to investors for gross proceeds totaling $3,630,677 before deducting sales commissions of $90,247 to the placement agent, during the nine months ended September 30, 2025 (among which 26,338 shares of common stock were sold for gross proceeds totaling $119,637 before deducting sales commissions of $2,991 to placement agent during the three months ended September 30, 2025). In connection with the Sales Agreement, the Company sold 305,531 common shares (9,165,931 prior to the Reverse Stock Split) at various amounts per share to investors for gross proceeds totaling $4,178,453, before deducting sales commissions of $104,446 to placement agent, during the nine months ended September 30, 2024 (among which 233,473 shares of common stock (7,004,194 prior to the Reverse Stock Split) were sold for gross proceeds totaling $2,001,897 before deducting sales commissions of $50,047 to placement agent during the three months ended September 30, 2024). The Company also paid the placement agent a fee of $55,000. Other Common Stock Issuance During the three and nine months ended September 30, 2025, the Company issued 0 shares and 2,061 shares (on a Reverse Stock Split-adjusted basis) of Common Stock to a consultant for services pursuant to vesting of Restricted Stock Units granted, valued at $0 and $12,000, respectively. During the three and nine months ended September 30, 2024, the Company issued 625 common shares (18,746 prior to the Reverse Stock Split) and 1,089 shares (32,665 prior to the Reverse Stock Split) to 2 consultants for services pursuant to vesting of Restricted Stock Units granted, valued at $6,000 and $20,000, respectively. On March 31, 2024, the Company issued 1,174 shares (35,212 prior to the Reverse Stock Split) of Common Stock to the board of directors for services pursuant to vesting of Restricted Stock Units granted, valued at $50,000. Warrants During the nine months ended September 30, 2025 and 2024, in connection with the Private Placement as described above, the Company issued warrants that are exercisable for an aggregate of 0 and 22,471 shares of Common Stock (674,146 prior to the Reverse Stock Split), respectively. Warrant activity during the nine months ended September 30, 2025 and 2024 was as follows:
Schedule of warrant activity |  |  |  |  |  |  |  |  |
|  | Warrant shares Outstanding |  |  | Weighted Average Exercise Price |  |  | Weighted Average Remaining Contractual Life (Years) |
Warrants outstanding at December 31, 2023 |  |  | 261,821 |  |  | $ | 291.05 |  |  |  | 3.72 |
Warrants granted |  |  | 22,471 |  |  |  | 53.40 |  |  |  |  |
Warrants outstanding at September 30, 2024 |  |  | 284,292 |  |  | $ | 272.26 |  |  |  | 3.16 |
Warrants outstanding at December 31, 2024 |  |  | 284,292 |  |  | $ | 272.26 |  |  |  | 2.91 |
No warrant activity |  |  | — |  |  |  | — |  |  |  |  |
Warrants outstanding at September 30, 2025 |  |  | 284,292 |  |  | $ | 272.26 |  |  |  | 2.16 |
Options On January 23, 2024, the Company authorized an additional 35,349 shares (1,060,458 prior to the Reverse Stock Split) to the Equity Incentive Plan Reserve (the “2022 Plan”) and granted 39,594 options (1,187,826 prior to the Reverse Stock Split) to management and employees, 38,894 (1,166,826 prior to the Reverse Stock Split) of which vested immediately with the remaining 700 options (21,000 prior to the Reverse Stock Split) subject to 50% vesting on June 30, 2024 and 100% vesting on December 31, 2024. Each option has an exercise price of $63.30 per share ($2.11 prior to the Reverse Stock Split) with an expiration date of January 23, 2034. The immediately vested 38,894 stock options (1,166,826 prior to the Reverse Stock Split) were valued at $2,461,404 at grant date based on the Black-Scholes Option Pricing model. The following assumptions were utilized in the Black-Scholes valuation of these immediately vested stock options during the nine months ended September 30, 2024, risk free interest rate of 5.22%, volatility of 228% and an exercise price of $63.30 ($2.11 prior to the Reverse Stock Split). For the remaining 700 options (21,000 prior to the Reverse Stock Split), 250 options (7,500 prior to the Reverse Stock Split) were vested on June 30, 2024, 167 options (5,000 prior to the Reverse Stock Split) were vested on December 31, 2024 and 283 options (8,500 prior to the Reverse Stock Split) were forfeited before vesting with the leaving of the employees before December 31, 2024. The vested stock options were valued at $4,106 at vesting date based on the Black-Scholes Option Pricing model. The following assumptions were utilized in the Black-Scholes valuation of these vested stock options during the year ended December 31, 2024, risk free interest rate of 4.40%, volatility of 188% and an exercise price of $63.30 ($2.11 prior to the Reverse Stock Split). On March 31, 2025, the Company authorized an additional 95,721 shares (2,871,638 prior to the Reverse Stock Split) to the 2022 Plan and granted 2,524 stock options (75,756 prior to the Reverse Stock Split) to the board of directors, which vested immediately on grant date. Each option has an exercise price of $9.90 per share ($0.33 prior to the Reverse Stock Split) with an expiration date of March 31, 2035. These immediately vested stock options were valued at $24,612 at grant date based on the Black-Scholes Option Pricing model. The following assumptions were utilized in the Black-Scholes valuation of these immediately vested stock options during the nine months ended September 30, 2025, risk free interest rate of 4.3908%, volatility of 148% and an exercise price of $9.90 ($0.33 prior to the Reverse Stock Split). On June 30, 2025, the Company granted 6,944 stock options to the board of directors, which vested immediately on grant date. Each option has an exercise price of $3.60 per share with an expiration date of June 30, 2035. These immediately vested stock options were valued at $24,778 at grant date based on the Black-Scholes Option Pricing model. The following assumptions were utilized in the Black-Scholes valuation of these immediately vested stock options during the nine months ended September 30, 2025, risk free interest rate of 4.39%, volatility of 161% and an exercise price of $3.60. On September 30, 2025, the Company granted 6,236 stock options to the board of directors, which vested immediately on grant date. Each option has an exercise price of $4.01 per share with an expiration date of September 30, 2035. These immediately vested stock options were valued at $24,762 at grant date based on the Black-Scholes Option Pricing model. The following assumptions were utilized in the Black-Scholes valuation of these immediately vested stock options during the three and nine months ended September 30, 2025, risk free interest rate of 4.42%, volatility of 159% and an exercise price of $4.01. On June 30, 2024, the Company granted 1,012 stock options (30,300 prior to the Reverse Stock Split) to the board of directors, which vested immediately on grant date. Each option has an exercise price of $16.50 per share ($0.55 prior to the Reverse Stock Split) with an expiration date of June 30, 2034. These immediately vested stock options were valued at $16,625 at grant date based on the Black-Scholes Option Pricing model. The following assumptions were utilized in the Black-Scholes valuation of these immediately vested stock options during the nine months ended September 30, 2024, risk free interest rate of 4.40%, volatility of 188% and an exercise price of $16.50 ($0.55 prior to the Reverse Stock Split). On September 30, 2024, the Company granted 2,492 stock options (74,744 prior to the Reverse Stock Split) to the board of directors, which vested immediately on grant date. Each option has an exercise price of $6.60 per share ($0.22 prior to the Reverse Stock Split) with an expiration date of September 30, 2034. These immediately vested stock options were valued at $16,618 at grant date based on the Black-Scholes Option Pricing model. The following assumptions were utilized in the Black-Scholes valuation of these immediately vested stock options during the three and nine months ended September 30, 2024, risk free interest rate of 3.79%, volatility of 184% and an exercise price of $6.60 ($0.22 prior to the Reverse Stock Split). Option activity during the nine months ended September 30, 2025 and 2024 was as follows:
Schedule of option activity |  |  |  |  |  |  |  |  |
|  | Options Outstanding |  |  | Weighted Average Exercise Price |  |  | Weighted Average Remaining Contractual Life (Years) |
Options outstanding at December 31, 2023 |  |  | 86,153 |  |  | $ | 91.72 |  |  |  | 8.71 |
Options granted |  |  | 43,096 |  |  |  | 58.93 |  |  |  |  |
Options expired or cancelled or forfeited |  |  | (283 | ) |  |  | 63.30 |  |  |  |  |
Options outstanding at September 30, 2024 |  |  | 128,966 |  |  | $ | 80.82 |  |  |  | 7.72 |
Options vested and exercisable at September 30, 2024 |  |  | 128,799 |  |  | $ | 80.82 |  |  |  |  |
Options outstanding at December 31, 2024 |  |  | 119,807 |  |  | $ | 82.25 |  |  |  | 8.12 |
Options granted |  |  | 15,704 |  |  |  | 4.78 |  |  |  |  |
Options expired or cancelled or forfeited |  |  | (415 | ) |  |  | 63.30 |  |  |  |  |
Options outstanding at September 30, 2025 |  |  | 135,096 |  |  | $ | 73.30 |  |  |  | 7.66 |
Options vested and exercisable at September 30, 2025 |  |  | 135,096 |  |  | $ | 73.30 |  |  |  |  |

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