Pulmatrix to Acquire Eos Senolytix in Merger Agreement
Pulmatrix and Eos Senolytix, a biotechnology company developing novel gerotherapeutic peptides targeting mitochondrial dysfunction in aging-related diseases, announced a definitive merger agreement under which Pulmatrix will acquire Eos. Upon completion of the merger, the combined company will operate as Eos Senolytix, and is expected to trade on Nasdaq under the ticker symbol "EOSX." In connection with the Merger, Eos and Pulmatrix have entered into definitive agreements for concurrent private financings of $19M in aggregate gross proceeds, including a $1M investment in Pulmatrix from RCM Eos Pipe Holdings, and a bridge component for Eos from RCM Eos Holdings, both managed by Rapha Capital Management. The net proceeds are expected to support advancement of Eos's proprietary MitoXcel platform, including its lead clinical candidate, PTC-2105, for sarcopenia and sarcopenic obesity. The proposed merger is currently expected to close in mid-2026, subject to customary closing conditions. Following the closing of the merger, pre-Merger Pulmatrix stockholders are expected to own approximately 6% of the combined company, while pre-Merger Eos stockholders are expected to own approximately 94%. Eos's proprietary MitoXcel platform leverages AI-driven mitochondrial peptide design to improve body composition by increasing lean mass while reducing harmful abdominal/visceral fat, without directly targeting muscle or fat regulatory pathways. Eos's lead program, PTC-2105, is a mitochondrial-targeted geropeptide designed to both enhance mitochondrial efficiency and selectively induce apoptotic self-elimination of senescent cells. Eos is led by Kevin Slawin, founder and CEO. Immediately following closing, the combined company is expected to operate as Eos Senolytix.
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Funding Announcement: Pulmatrix Inc. has secured $19 million in financing to advance its clinical candidate PTc-2105.
Target Indications: The funding will support the development of PTc-2105 for the treatment of sarcopenia and age-related diseases.
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- Merger Agreement: Pulmatrix Inc. has agreed to merge with Eos SENOLYTIX, Inc., with the combined entity set to operate under the Eos SENOLYTIX name and trade on Nasdaq as 'EOSX', marking a strategic shift towards enhancing health span.
- Financing Support: The merger is backed by $19 million in new private financing, including a $1 million investment into Pulmatrix and bridge financing for Eos, which will facilitate the advancement of Eos's lead candidate PTC-2105, indicating strong market confidence in the technology.
- Technological Innovation: Eos's MitoXcel AI-driven geropeptide technology aims to improve body composition by increasing lean mass and reducing visceral fat rather than merely focusing on weight loss, showcasing the company's innovative approach in obesity treatment that could redefine traditional methodologies.
- Shareholder Structure Change: Following the merger, Pulmatrix shareholders are expected to own about 6% of the combined company, while Eos shareholders and financing participants will hold approximately 94%, reflecting Eos's dominant position in the merger, which is anticipated to close in mid-2026.
- Merger Announcement: Pulmatrix Inc. has announced a definitive agreement to merge with Eos Senolytix Inc., with the transaction expected to close in mid-2026, marking a significant strategic expansion for the company as it will trade under the name Eos Senolytix on Nasdaq.
- Equity Structure Change: Post-merger, pre-merger Pulmatrix shareholders are expected to own approximately 6% of the combined entity, while Eos shareholders will hold about 94%, which will influence future governance and decision-making processes within the new company.
- Financing Support: The transaction includes $19 million in private financing, which features a $1 million investment in Pulmatrix, with proceeds aimed at supporting the development of Eos's MitoXcel platform and its lead clinical candidate PTC-2105, targeting age-related diseases.
- Leadership Transition: Following the merger, Eos CEO Kevin Slawin is expected to lead the combined company, a leadership change that could significantly impact the strategic direction and market performance of the new entity.
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- Market Reaction: Following the announcement, GYRE's shares rose by 8%, indicating a positive market response to the acquisition, although the stock has lost 22% over the past 12 months, reflecting cautious optimism among investors regarding future growth prospects.
- Challenges for Pulmatrix: Pulmatrix's stock plummeted 36% after the termination of its merger agreement with Cullgen, and the company is now actively seeking alternative merger opportunities, highlighting the uncertainty and pressure faced in the industry consolidation landscape.
- Regulatory Hurdles: Pulmatrix noted that it did not receive the necessary approval from the China Securities Regulatory Commission, which led to the termination of the deal with Cullgen, underscoring the complexities and potential risks associated with cross-border transactions.









