S-1
filed
Initial registration statement
Initial public filing submitted to start the SEC review process.
Follows DRS/A in the pre-IPO sequence.
Common Stock · Exchange Nasdaq Global Select Market · Ticker BBTX · Use of proceeds Net proceeds will be used to fund development of lead product candidates and additional research and development activities
Bambusa Therapeutics, Inc. filed an S-1 registration statement for its IPO, disclosing significant financial challenges including a $41.1 million net loss for 2025 and $22.4 million loss for the first half of 2026. The company has raised $136.1 million in preferred stock financing since inception but faces substantial doubt about its ability to continue as a going concern due to negative cash flows and reliance on future funding. Liquidity is projected to last 12 months post-IPO, with risks including clinical trial failures, regulatory delays, and potential dilution from additional equity offerings.
2026-10-09 · 0001628280-26-065557
DRS/A
amended
Amended draft registration statement
Updated draft registration filed before the public launch.
Updates the prior DRS filing.
Bambusa Therapeutics, Inc. is a clinical-stage biopharmaceutical company focused on developing bispecific antibodies for immunological and inflammatory disorders. The company has incurred significant losses since inception, with an accumulated deficit of $54.8 million as of December 2025. Its financial statements raise substantial doubt about its ability to continue as a going concern due to recurring losses, negative cash flow, and reliance on external financing. The company has raised capital through convertible preferred stock issuances and has not yet generated revenue from product sales. The audit report highlights ongoing challenges in achieving profitability and sustaining operations without additional funding.
2026-09-15 · 0001628280-26-061935
DRS
filed
Draft registration statement
Draft registration filed confidentially before the public launch.
First tracked pre-IPO filing for this issuer.
Bambusa Therapeutics, Inc. is a clinical-stage biopharmaceutical company focused on developing bispecific antibodies for immunological and inflammatory disorders. The company, incorporated in March 2024, has incurred significant losses since inception and operates under substantial doubt regarding its ability to continue as a going concern. Its financial statements for 2025 highlight recurring losses, negative cash flows, and reliance on convertible preferred stock financing. An independent auditor expressed concerns about the company's viability, with no revenue generated from product sales to date.
2026-08-03 · 0001628280-26-051869