SAN DIEGO, Aug. 13, 2024 — Cidara Therapeutics, Inc. (Nasdaq: CDTX) (the Company), a biotechnology company using its proprietary Cloudbreak platform to develop drug-Fc conjugate (DFC) immunotherapies designed to save lives and improve the standard of care for patients facing serious diseases, today reported financial results for the second quarter ended June 30, 2024, and provided an update on its corporate activities and product pipeline.

"We continue to focus on our Cloudbreak DFC platform with the advancement of CD388 and other programs," said Jeffrey Stein, Ph.D., president and chief executive officer of Cidara. "Our Phase 2b study to evaluate the efficacy and safety of CD388, a long-acting drug candidate that provides season-long, universal protection from influenza, is on track to start in the fall of 2024 during the Northern Hemisphere influenza season with 4,000 subjects to be enrolled in the United States and 1,000 subjects to be enrolled in the United Kingdom. We believe that CD388 has important advantages over vaccines to provide long-term protection against both seasonal and pandemic strains of influenza with a single dose per flu season."

Recent Corporate Highlights

• Reacquired exclusive global development and commercial rights to CD388: In April 2024, Cidara entered into a definitive agreement with J&J Innovative Medicine, previously Janssen Pharmaceuticals, Inc., one of the Janssen Pharmaceutical Companies of Johnson & Johnson (Janssen), to reacquire the exclusive global development and commercial rights to CD388, which is in development for the prevention of all strains of influenza A and B (Janssen License Agreement). Cidara is finalizing the protocol for a Phase 2b clinical trial, which the Company intends to initiate in the fall of 2024 during the Northern Hemisphere influenza season.
• Closed $240.0 million private placement: In April 2024 and in conjunction with the reacquisition of CD388, Cidara closed a definitive agreement for the sale of preferred stock in a $240.0 million private placement (Private Placement) led by RA Capital Management, with significant participation from Bain Capital Life Sciences, Biotech Value Fund and Canaan Partners. The proceeds from the Private Placement were used to fund the upfront payment of $85.0 million under the agreement with Janssen and the remainder of the gross proceeds of $155.0 million are expected to provide runway beyond topline data from CD388's planned Phase 2b trial.
• Divested rezafungin to its former licensee, Mundipharma: In April 2024, Cidara entered into an asset purchase agreement with Napp Pharmaceutical Group Limited (Napp), a member of the international network of Mundipharma independent associated companies (Mundipharma), for the divestiture of rezafungin (Purchase Agreement). Cidara estimates that it will achieve approximately $128.0 million in cost savings over the patent life of rezafungin. On July 18, 2024, Cidara received a notice of satisfaction from Mundipharma that it had completed the required performance obligations under a transition services agreement and, accordingly, the $11.1 million development milestone advance previously made to Cidara, and reimbursable to Mundipharma, was forgiven by Mundipharma.
• IND Clearance for CBO421: Cidara received investigational new drug application (IND) clearance for CBO421 in July 2024.

Second Quarter 2024 Financial Results

• Revenue totaled $0.3 million and $1.3 million for the three and six months ended June 30, 2024, respectively, compared to $5.1 million and $11.3 million for the same periods in 2023, respectively. Revenue for the three and six months ended June 30, 2024 and 2023 related to research and development and clinical supply services provided to Janssen under the preexisting Janssen Collaboration Agreement. The Janssen Collaboration Agreement was terminated upon the effectiveness of the Janssen License Agreement on April 24, 2024.
• Cash and cash equivalents totaled $164.4 million as of June 30, 2024, compared with $35.8 million as of December 31, 2023.
• Acquired in-process research and development expenses were $84.9 million for the three and six months ended June 30, 2024 and related to an upfront payment of $85.0 million paid to Janssen under the Janssen License Agreement, on April 24, 2024, plus $0.4 million in direct transaction costs, offset by a settlement gain of $0.5 million to settle the preexisting Janssen Collaboration Agreement relationship.
• Research and development expenses were $6.7 million and $12.6 million for the three and six months ended June 30, 2024, respectively, compared to $8.7 million and $18.4 million for the same periods in 2023, respectively. The decrease in research and development expenses for the three and six months ended June 30, 2024, compared to the three and six months ended June 30, 2023 is primarily due to lower nonclinical expenses associated with our Cloudbreak platform, offset by higher personnel costs supporting our Cloudbreak platform.
• Selling, general and administrative (SG&A) expenses were $4.7 million and $8.3 million for the three and six months ended June 30, 2024, respectively, compared to $3.2 million and $6.8 million for the same period in 2023, respectively. The SG&A expenses for all periods primarily relate to consulting, personnel and legal costs.
• On April 24, 2024, Cidara entered into the Purchase Agreement with Napp, pursuant to which we sold to Napp all of its rezafungin assets and related contracts. We completed all conditions of the sale on April 24, 2024. We determined that the sale of rezafungin represented a strategic shift that will have a major effect on our operations and financial results. Accordingly, the sale of rezafungin is classified as discontinued operations. Net income from discontinued operations for the three months ended June 30, 2024, was $3.0 million and net income from discontinued operations for the six months ended June 30, 2024 was $0.9 million, compared to net loss from discontinued operations of $7.5 million and net income from discontinued operations of $2.5 million for the same periods in 2023, respectively.
• Net loss for the three and six months ended June 30, 2024 was $91.2 million and $101.5 million, respectively, compared to a net loss of $13.6 million and $10.6 million for the same periods in 2023, respectively.
• During the three and six months ended June 30, 2024, Cidara did not sell shares of common stock pursuant to its at-the-market sales agreement.
• As of June 30, 2024, Cidara had 4,568,991 shares of common stock outstanding, 240,000 shares of Series A Convertible Voting Preferred Stock outstanding, which are convertible into 16,800,000 shares of common stock, and 2,104,472 shares of Series X Convertible Preferred Stock outstanding, which are convertible into 1,052,236 shares of common stock.
• On July 18, 2024, the Company's stockholders approved the issuance of up to 16,800,000 shares of common stock upon conversion of 240,000 shares of Series A Convertible Voting Preferred Stock issued in the Private Placement completed in April 2024. On July 19, 2024, the Company issued 2,469,250 shares of common stock upon automatic conversion of 35,275 shares of Series A Convertible Voting Preferred Stock. Cidara had 7,038,241 shares of common stock issued and outstanding immediately following this automatic conversion.

About Cidara Therapeutics

Cidara Therapeutics is using its proprietary Cloudbreak platform to develop novel drug-Fc conjugates (DFCs). These targeted immunotherapies offer the unique opportunity to create "single molecule cocktails" comprised of targeted small molecules and peptides coupled to a human antibody fragment (Fc). DFCs are designed to save lives and improve the standard of care for patients facing cancers and other serious diseases by inhibiting specific disease targets while simultaneously engaging the immune system. Cidara is headquartered in San Diego, California. For more information, please visit .

Forward-Looking Statements

This release contains "forward-looking statements" within the meaning of Section 27A of the Securities Act of 1933, as amended, and Section 21E of the Securities Exchange Act of 1934, as amended, and such forward-looking statements are made pursuant to the safe harbor provisions of the Private Securities Litigation Reform Act of 1995. "Forward-looking statements" describe future expectations, plans, results, or strategies and are generally preceded by words such as "anticipates," "expect," "intends," "may," "plan" or "will". Forward-looking statements in this release include, but are not limited to, statements related to whether we will start a Phase 2b clinical trial for CD388 in the fall of 2024, whether and when we may initiate a clinical trial for CBO421 following IND clearance, and whether CD388 or CBO421 will ultimately be approved for commercial sale by regulators in the U.S. or any country or will generate any revenue. Such statements are subject to a multitude of risks and uncertainties that could cause future circumstances, events, or results to differ materially from those projected in the forward-looking statements, such as unanticipated delays in or negative results from Cidara's preclinical or clinical trials, delays in action by regulatory authorities, and other obstacles on the enrollment of patients or other aspects of CD388, or other DFC development. These and other risks are identified under the caption "Risk Factors" in Cidara's most recent Quarterly Report on Form 10-Q and other filings subsequently made with the SEC. All forward-looking statements contained in this press release speak only as of the date on which they were made and are based on management's assumptions and estimates as of such date. Cidara does not undertake any obligation to publicly update any forward-looking statements, whether as a result of the receipt of new information, the occurrence of future events or otherwise.

INVESTOR CONTACT:
Brian Ritchie
LifeSci Advisors
(212) 915-2578
britchie@lifesciadvisors.com

MEDIA CONTACT:
Veronica Eames
LifeSci Communications
(646) 970-4682
veames@lifescicomms.com