4D Molecular Therapeutics

4DMT is a gene therapy company with a transformative discovery platform --Therapeutic Vector Evolution-- that enables our “disease first” approach to product discovery and development, thereby allowing us to customize our AAV vectors to target specific tissue types associated with the underlying disease.

At 4DMT we are creating and developing optimized “biopharmaceutical grade” AAV vectors that will allow us uniquely to unlock the full potential of gene therapy. Our customized and proprietary AAV vectors are each designed, according to a 4DMT Target Vector Profile, to deliver genes to specific cells and tissues in the body to eradicate both rare and large market diseases.

While AAV gene therapy pioneers are making great strides with the first wave of products, hurdles still exist with the use of conventional vectors. The most commonly used AAV capsids (e.g., AAV2, 5, 8 and 9) were identified either 1) as contaminants in lab stocks of adenovirus, or 2) through monkey tissue processing. Therefore, these conventional vectors are not targeted specifically to any tissue in the body. This can lead to inefficient and non-specific delivery, thus requiring extremely high doses and potentially resulting in toxicities (including inflammation), high manufacturing burdens and suboptimal efficacy. In addition, suboptimal routes of delivery can be required for delivery to the right tissues (e.g., subretinal delivery to the retina). Finally, pre-existing neutralizing antibodies in many patients can limit efficacy, clinical trial enrollment and market sizes. 4DMT Innovation empowers us to create new and improved next generation AAV capsids to allow targeted delivery of our products by the optimal clinical route of administration.

At 4DMT we use our robust discovery platform, termed “Therapeutic Vector Evolution,” to create customized and proprietary gene delivery vehicles (novel AAV vectors) to deliver genes to specific tissues and cells in the body by the optimal route of administration. We use the power of evolution to create and refine these optimized vectors through genetic diversification and then natural selection in vivo.

4D Purpose Statement: Boldly Innovating to Unlock the Full Potential of Gene Therapy for Countless Patients


  • Dare to Cure - Patients are waiting. Create big dreams for patients and take calculated risks to achieve them
  • Break Boundaries - Question the status quo and innovate beyond conventional approaches
  • Beyond Yourself - It’s about patients, their families, our team, our families. We strengthen each other.
  • Prepare and Execute Relentlessly - Start with the end in mind, over-prepare and make contingency plans to your contingency plans

We invite all of you who share our passion and vision in creating the ultimate gene therapy products to cure genetic and rare diseases in children and adults. We seek the best people in the industry who identify with our mission and innovative results-driven approach. We offer an inspiring and collaborative environment that encourages individual contributions, recognizes performance in multiple ways, offers generous benefits and provides challenging opportunities for career development.

  • 2024 Best Places to Work
  • 2023 Best Places to Work
  • 2022 Best Places to Work
5858 Horton St. Suite 455
Emeryville, CA 94608
  • Featured Employer
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The FDA placed 4D Molecular Therapeutics’ gene therapy program, 4D-310, on clinical hold, the company announced Thursday.
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