Organization and Basis of Presentation	6 Months Ended
Jun. 30, 2025
Organization, Consolidation and Presentation of Financial Statements [Abstract]
Organization and Basis of Presentation	1. Organization and Basis of Presentation The Company Beta Bionics, Inc. (the “Company”) is a commercial-stage medical device company engaged in the design, development, and commercialization of innovative solutions to improve the health and quality of life of insulin-requiring people with diabetes (“PWD”) by utilizing advanced adaptive closed-loop algorithms to simplify and improve the treatment of their disease. The Company was incorporated as a Massachusetts benefit corporation in October 2015, and converted to a Delaware corporation in August 2024. The Company’s product, the iLet, was cleared by the FDA for the treatment of T1D in adults and children six years of age and older in May 2023, and it began commercializing the iLet in the United States in May 2023. The iLet is the first adaptive closed-loop algorithm insulin dosing system that does not require T1D users to keep a daily tabulation of their carbohydrate intake or perform calculations to determine the correct dose of insulin to take. From its inception to June 30, 2025, the Company has devoted substantially all of its resources to organizing and staffing the Company, business planning, capital raising, establishing and engaging in collaborations, performing research and development, advancing and scaling up manufacturing capabilities, commercializing its products, establishing a sales infrastructure and providing general and administrative support for these activities. The Company’s operations to date have been funded primarily through the issuance and sale of convertible preferred stock and common stock and sales of the iLet and single-use products. Reverse Stock Split On January 21, 2025, the Company effectuated a 1-for-1.970 reverse stock split of the Company’s issued and outstanding shares of Class A, Class B and Class C common stock, Series A convertible preferred stock (the “Series A Preferred Stock”), Series A-2 convertible preferred stock (the “Series A-2 Preferred Stock”), Series B convertible preferred stock (the “Series B Preferred Stock”), Series B-2 convertible preferred stock (the “Series B-2 Preferred Stock”), Series C convertible preferred stock (the “Series C Preferred Stock”), Series D convertible preferred stock (the “Series D Preferred Stock”), and Series E convertible preferred stock (the “Series E Preferred Stock”) , as well as stock option awards to purchase shares of Class B common stock and warrants to purchase shares of Class B common stock and Series C Preferred Stock. Consequently, all issued and outstanding shares of stock, stock option awards, warrants, and per share data have been retroactively adjusted in these financial statements to reflect the reverse stock split for all periods presented. The authorized shares and par value of the common stock and preferred stock remain unchanged. As the number and issuance price of all outstanding preferred stock were adjusted, the conversion ratios for each series of the Company’s preferred stock were unchanged. Stockholders entitled to fractional shares as a result of the reverse stock split received cash payment in lieu of receiving fractional shares. Accordingly, all share and per share data included in these financial statements and the accompanying notes have been adjusted retroactively to reflect the impact of the reverse stock split. Initial Public Offering On January 31, 2025, the Company completed its initial public offering (“IPO”) pursuant to which the Company issued 13,800,000 shares of its common stock, including 1,800,000 additional shares pursuant to the exercise in full of the underwriters of their option to purchase shares of common stock from the Company and other selling stockholders (consisting of 475,000 shares from the Company and 1,325,000 shares from the selling stockholders), at a public offering price of $17.00 per share (the “IPO Price”). The aggregate net proceeds from the offering, after deducting underwriting discounts, commissions, and other offering expenses, were approximately $190.4 million. In addition, upon the closing of the IPO, all 6,671,174 shares of Class A, Class B, and Class C Common Stock were converted into an equal number of shares of common stock, all 17,228,954 outstanding shares of convertible preferred stock were converted into 19,827,003 shares of common stock, and all 3,196,025 outstanding warrants to purchase shares of Series C Preferred Stock and Class B Common Stock were converted into 3,373,409 shares of common stock. Private Placement Offering On January 21, 2025, the Company entered into a Common Stock Purchase Agreement (the “Private Placement Offering”) with an existing accredited investor pursuant to which the Company sold 1,000,000 shares of its common stock at a per share price equal to the IPO Price. The Private Placement Offering closed concurrently with the IPO on January 31, 2025. The aggregate net proceeds from the Private Placement Offering, after deducting underwriting discounts, commissions, and other offering expenses, were approximately $15.6 million. Basis of Presentation The Company’s unaudited condensed financial statements have been prepared pursuant to the rules and regulations of the U.S. Securities and Exchange Commission applicable to interim financial information. Certain information and footnote disclosures normally included in annual financial statements prepared in accordance with generally accepted accounting principles in the United States (“GAAP”) have been condensed or omitted pursuant to such rules and regulations. Any reference in these notes to applicable guidance is meant to refer to the authoritative GAAP as found in the Accounting Standards Codification (“ASC”). Interim financial results are not necessarily indicative of results anticipated for the full year or any other period(s). These unaudited condensed financial statements should be read in conjunction with the audited financial statements and the notes thereto included in the Company’s Annual Report on Form 10-K for the fiscal year ended December 31, 2024 (“2024 Annual Report”). Emerging Growth Company Status The Company is an emerging growth company, as defined in the JOBS Act, enacted in 2012. Under the JOBS Act, emerging growth companies can delay adopting new or revised accounting standards issued after the enactment of the JOBS Act until those standards apply to private companies. The Company has elected to use this extended transition period for complying with new or revised accounting standards that have different effective dates for public and private companies until the earlier of the date that it (i) is no longer an emerging growth company or (ii) affirmatively and irrevocably opts out of the extended transition period provided in the JOBS Act. As a result, these financial statements may not be comparable to companies that comply with the new or revised accounting pronouncements as of public company effective dates.

Organization and Basis of Presentation

6 Months Ended

Jun. 30, 2025

Organization, Consolidation and Presentation of Financial Statements [Abstract]

The Company

Beta Bionics, Inc. (the “Company”) is a commercial-stage medical device company engaged in the design, development, and commercialization of innovative solutions to improve the health and quality of life of insulin-requiring people with diabetes (“PWD”) by utilizing advanced adaptive closed-loop algorithms to simplify and improve the treatment of their disease. The Company was incorporated as a Massachusetts benefit corporation in October 2015, and converted to a Delaware corporation in August 2024.

The Company’s product, the iLet, was cleared by the FDA for the treatment of T1D in adults and children six years of age and older in May 2023, and it began commercializing the iLet in the United States in May 2023. The iLet is the first adaptive closed-loop algorithm insulin dosing system that does not require T1D users to keep a daily tabulation of their carbohydrate intake or perform calculations to determine the correct dose of insulin to take.

From its inception to June 30, 2025, the Company has devoted substantially all of its resources to organizing and staffing the Company, business planning, capital raising, establishing and engaging in collaborations, performing research and development, advancing and scaling up manufacturing capabilities, commercializing its products, establishing a sales infrastructure and providing general and administrative support for these activities. The Company’s operations to date have been funded primarily through the issuance and sale of convertible preferred stock and common stock and sales of the iLet and single-use products.

Reverse Stock Split

On January 21, 2025, the Company effectuated a 1-for-1.970 reverse stock split of the Company’s issued and outstanding shares of Class A, Class B and Class C common stock, Series A convertible preferred stock (the “Series A Preferred Stock”), Series A-2 convertible preferred stock (the “Series A-2 Preferred Stock”), Series B convertible preferred stock (the “Series B Preferred Stock”), Series B-2 convertible preferred stock (the “Series B-2 Preferred Stock”), Series C convertible preferred stock (the “Series C Preferred Stock”), Series D convertible preferred stock (the “Series D Preferred Stock”), and Series E convertible preferred stock (the “Series E Preferred Stock”) , as well as stock option awards to purchase shares of Class B common stock and warrants to purchase shares of Class B common stock and Series C Preferred Stock. Consequently, all issued and outstanding shares of stock, stock option awards, warrants, and per share data have been retroactively adjusted in these financial statements to reflect the reverse stock split for all periods presented. The authorized shares and par value of the common stock and preferred stock remain unchanged. As the number and issuance price of all outstanding preferred stock were adjusted, the conversion ratios for each series of the Company’s preferred stock were unchanged. Stockholders entitled to fractional shares as a result of the reverse stock split received cash payment in lieu of receiving fractional shares. Accordingly, all share and per share data included in these financial statements and the accompanying notes have been adjusted retroactively to reflect the impact of the reverse stock split.

Initial Public Offering

On January 31, 2025, the Company completed its initial public offering (“IPO”) pursuant to which the Company issued 13,800,000 shares of its common stock, including 1,800,000 additional shares pursuant to the exercise in full of the underwriters of their option to purchase shares of common stock from the Company and other selling stockholders (consisting of 475,000 shares from the Company and 1,325,000 shares from the selling stockholders), at a public offering price of $17.00 per share (the “IPO Price”). The aggregate net proceeds from the offering, after deducting underwriting discounts, commissions, and other offering expenses, were approximately $190.4 million. In addition, upon the closing of the IPO, all 6,671,174 shares of Class A, Class B, and Class C Common Stock were converted into an equal number of shares of common stock, all 17,228,954 outstanding shares of convertible preferred stock were converted into 19,827,003 shares of common stock, and all 3,196,025 outstanding warrants to purchase shares of Series C Preferred Stock and Class B Common Stock were converted into 3,373,409 shares of common stock.

Private Placement Offering

On January 21, 2025, the Company entered into a Common Stock Purchase Agreement (the “Private Placement Offering”) with an existing accredited investor pursuant to which the Company sold 1,000,000 shares of its common stock at a per share price equal to the IPO Price. The Private Placement Offering closed concurrently with the IPO on January 31, 2025. The aggregate net proceeds from the Private Placement Offering, after deducting underwriting discounts, commissions, and other offering expenses, were approximately $15.6 million.

Basis of Presentation

The Company’s unaudited condensed financial statements have been prepared pursuant to the rules and regulations of the U.S. Securities and Exchange Commission applicable to interim financial information. Certain information and footnote disclosures normally included in annual financial statements prepared in accordance with generally accepted accounting principles in the United States (“GAAP”) have been condensed or omitted pursuant to such rules and regulations. Any reference in these notes to applicable guidance is meant to refer to the authoritative GAAP as found in the Accounting Standards Codification (“ASC”).

Interim financial results are not necessarily indicative of results anticipated for the full year or any other period(s). These unaudited condensed financial statements should be read in conjunction with the audited financial statements and the notes thereto included in the Company’s Annual Report on Form 10-K for the fiscal year ended December 31, 2024 (“2024 Annual Report”).

Emerging Growth Company Status

The Company is an emerging growth company, as defined in the JOBS Act, enacted in 2012. Under the JOBS Act, emerging growth companies can delay adopting new or revised accounting standards issued after the enactment of the JOBS Act until those standards apply to private companies. The Company has elected to use this extended transition period for complying with new or revised accounting standards that have different effective dates for public and private companies until the earlier of the date that it (i) is no longer an emerging growth company or (ii) affirmatively and irrevocably opts out of the extended transition period provided in the JOBS Act. As a result, these financial statements may not be comparable to companies that comply with the new or revised accounting pronouncements as of public company effective dates.