Apple Tree Partners

ATP, a global leader in life sciences venture capital, is developing the next generation of transformative biotechnology companies. ATP creates science-based companies starting with assets at various stages: from working with scientists on pre-IP ideas, to spinouts from existing company pipelines. The firm provides flexible capital, strategic insight, and operational resources to build sustainable, research-driven enterprises. ATP invests in its portfolio companies from seed stage through IPO and beyond and supports their management teams in strategic transactions and synergistic business combinations.

Diane Daych

Partner

Paul Eisenberg MD

Venture Partner

Seth L. Harrison

Founder and Managing Partner

Joseph A. Yanchik III

Venture Partner

Paul Da Silva Jardine

Venture Partner

53 past transactions

Initial Therapeutics

Series A in 2023
Initial Therapeutics is an ATP company that develops small-molecule medicines designed to prevent pathogenic protein synthesis. The company provides an approach that is differentiated from protein degradation and other interventions that recognize and tackle proteins only after they are fully formed for medical needs.

Adendra Therapeutics

Series A in 2021
Adendra is an emerging biotechnology company building on new insights into dendritic cell biology to discover and develop new small molecule and biologic medicines for the treatment of a wide range of cancers and autoimmune diseases.

Marengo Therapeutics

Series B in 2021
Marengo Therapeutics is seeking professionals who are motivated to make a positive difference in patients’ lives.
Intergalactic Therapeutics is an ATP company, is revolutionizing gene therapies with a novel non-viral platform comprised of its versatile synthetic and episomal C3DNA (covalently closed and circular DNA) molecules; a customized approach to focal therapeutic delivery using its lead delivery technology, the COMET® pulsed electric field system; and a proprietary cell-free manufacturing process invented to make gene therapy safer and more accessible for patients. With programs in ophthalmology, oncology, respiratory diseases, and expansion areas including CNS, renal, and musculoskeletal, Intergalactic Therapeutics is dedicated to transforming genetic medicine.

Replicate Bioscience

Series A in 2021
Replicate Bioscience creates novel oncology treatments to prevent and reverse drug resistance through a self-replicating RNA platform called SynRGY. By deploying SynRGY technology, the company aims to design novel treatments that prevent the occurrence of drug resistance and create solutions that enhance the effectiveness of many immuno-oncology regimens.

Galaxy Medical

Series A in 2021
Galaxy Medical is a privately held medical device company.

Replicate Bioscience

Funding Round in 2021
Replicate Bioscience creates novel oncology treatments to prevent and reverse drug resistance through a self-replicating RNA platform called SynRGY. By deploying SynRGY technology, the company aims to design novel treatments that prevent the occurrence of drug resistance and create solutions that enhance the effectiveness of many immuno-oncology regimens.

Aulos Bioscience

Series A in 2021
Aulos Bioscience is dedicated to revolutionizing patient care in cancer with highly differentiated immuno-oncology therapeutics. Their initial clinical candidate, AU-007, stands apart from existing IL-2 therapeutics by introducing a novel approach that addresses a significant medical challenge of the present era: the eradication of cancer. Through harnessing the anti-cancer potential of interleukin-2, they are breaking down barriers in the field of immuno-oncology. Their distinctive immunotherapy, computationally designed to precisely guide the immune system in attacking tumor cells, is poised to make a substantial impact.

Marengo Therapeutics

Seed Round in 2021
Marengo Therapeutics is seeking professionals who are motivated to make a positive difference in patients’ lives.

Intergalactic Therapeutics

Seed Round in 2021
Intergalactic Therapeutics is an ATP company, is revolutionizing gene therapies with a novel non-viral platform comprised of its versatile synthetic and episomal C3DNA (covalently closed and circular DNA) molecules; a customized approach to focal therapeutic delivery using its lead delivery technology, the COMET® pulsed electric field system; and a proprietary cell-free manufacturing process invented to make gene therapy safer and more accessible for patients. With programs in ophthalmology, oncology, respiratory diseases, and expansion areas including CNS, renal, and musculoskeletal, Intergalactic Therapeutics is dedicated to transforming genetic medicine.

Ascidian Therapeutics

Seed Round in 2021
Ascidian Therapeutics is redefining the treatment of disease by rewriting RNA. By editing exons at the RNA level, Ascidian therapies enable precise post-transcriptional editing of genes, resulting in full-length, functional proteins at the right levels, in the right cells, at the right time. With active discovery and preclinical programs in ophthalmology, neurological and neuromuscular disorders, and other rare diseases, Ascidian is opening new therapeutic possibilities for patients in need of breakthroughs.

Nereid Therapeutics

Series A in 2020
Nereid Therapeutics is discovering new disease treatments using proprietary technologies for generating, visualizing, and measuring liquid-liquid phase separation and the resulting biomolecular condensates.

Galaxy Medical

Seed Round in 2020
Galaxy Medical is a privately held medical device company.

Initial Therapeutics

Pre Seed Round in 2020
Initial Therapeutics is an ATP company that develops small-molecule medicines designed to prevent pathogenic protein synthesis. The company provides an approach that is differentiated from protein degradation and other interventions that recognize and tackle proteins only after they are fully formed for medical needs.

Nine Square Therapeutics

Series A in 2020
Nine Square Therapeutics is discovering new small-molecule therapeutics for degenerative movement disorders including Parkinson’s disease and amyotrophic lateral sclerosis (ALS), as well as non-degenerative disorders such as essential tremor and dyskinesias, by integrating computational chemistry, biophysics, and computational biology into machine-learning-enabled cell profiling platforms for target identification, chemical optimization, and patient stratification. It was founded in 2020 and headquartered in New York, United States.

Gala Therapeutics

Venture Round in 2019
Gala Therapeutics is a privately-held medical device company developing disease-modifying therapies to improve survival for patients with pulmonary diseases. Its therapies address the needs of interventional pulmonologists, thoracic surgeons, and physicians who treat a pulmonary disease that enables them to treat their patients better, resulting in a better medical outcome. It was founded in 2015 and is headquartered in Menlo Park, California.

Chinook Therapeutics

Series A in 2019
Chinook Therapeutics is a biotechnology company that specializes in the fields of therapeutics and life science. The company focuses on developing precision medicines for kidney diseases. Its services offers utilization of novel translational platforms and patient stratification tools, and emergence of accelerated regulatory pathways based on surrogate endpoints.

Bellus Health

Post in 2018
BELLUS Health is focused on developing drugs for rare diseases, starting with conditions that affect the kidneys. The lead program KIACTA™, a novel drug candidate, is in data review after announcing on June 20, 2016 top-line results from its Phase 3 study for the treatment of AA amyloidosis, a rare disease resulting in renal dysfunction that often leads to dialysis and death. BELLUS Health is partnered with global private equity firm Auven Therapeutics for the development of KIACTA™. KIACTA™ is also being developed as a treatment in a second indication called sarcoidosis, a rare, potentially fatal inflammatory condition that affects the lungs. An investigational new drug application (IND) for a Phase 2/3 clinical study is expected to be filed with the U.S. Food and Drug Administration in 2016. In addition, BELLUS Health is developing Shigamab™, an antibody treatment for Hemolytic Uremic Syndrome caused by Shiga toxin-producing E. coli (sHUS). sHUS often leads to dialysis, chronic kidney disease and in some cases death, particularly in children. Shigamab™ pre-clinical studies for the treatment of sHUS are currently underway. BELLUS Health’s pipeline also includes a research-stage project for the treatment of AL amyloidosis, a rare disease in which amyloid protein builds up and causes dysfunction in various parts of the body.

Stoke Therapeutics

Series B in 2018
Stoke is developing antisense oligonucleotide medicines that target RNA splicing to increase gene expression for the treatment of severe genetic diseases.

Akero Therapeutics

Series A in 2018
Akero Therapeutics is committed to providing meaningful treatment options for people with serious metabolic diseases like non-alcoholic steatohepatitis (NASH), a disease marked by inflammation in the liver and liver cell damage resulting in fibrosis, cirrhosis, liver failure, and death. The company is developing pioneering medicines designed to restore metabolic balance and halt NASH progression. Akero's lead clinical program, AKR-001, is a long-acting Fc fusion modified FGF21 protein and potential best-in-class treatment for NASH. The AKR-001 builds upon two decades of work on FGF21 biology. It is designed to affect both the liver and adipose tissue, reducing liver fat and suppressing inflammation and fibrosis.

Corvidia

Series B in 2018
Corvidia Therapeutics, Inc., a biotechnology company, develops precision cardiovascular therapies. The company was incorporated in 2014 and is based in Waltham, Massachusetts. As of July 31, 2020, Corvidia Therapeutics, Inc. operates as a subsidiary of Novo Nordisk A/S.

Braeburn

Debt Financing in 2018
Braeburn is dedicated to delivering solutions for people living with the serious consequences of opioid use disorder. At Braeburn, we challenge the status quo and champion transformation of the management of opioid use disorder (OUD) by partnering with the community to create a world where every person with OUD gets the best possible care and opportunity to reach their full potential.

Stoke Therapeutics

Series A in 2018
Stoke is developing antisense oligonucleotide medicines that target RNA splicing to increase gene expression for the treatment of severe genetic diseases.

Elstar Therapeutics

Series A in 2018
Elstar Therapeutics is fulfilling the promise of precision cancer immunotherapy through a powerful new approach to generating antibody-based, multi-functional therapeutics.

Syntimmune

Series B in 2017
Syntimmune is a clinical-stage biotechnology company developing differentiated drug candidates in a wide range of autoimmune diseases. It is seeking advancing novel therapies based on its expertise in the biology of the neonatal Fc receptor (FcRn) and its role in the pathogenesis of IgG-mediated autoimmune diseases. Laurence and Richard Blumberg founded Syntimmune in 2013. Its headquarters is in Boston in Massachusetts.

Syntimmune

Series A in 2016
Syntimmune is a clinical-stage biotechnology company developing differentiated drug candidates in a wide range of autoimmune diseases. It is seeking advancing novel therapies based on its expertise in the biology of the neonatal Fc receptor (FcRn) and its role in the pathogenesis of IgG-mediated autoimmune diseases. Laurence and Richard Blumberg founded Syntimmune in 2013. Its headquarters is in Boston in Massachusetts.

ROX Medical

Series E in 2016
ROX Medical is an early phase medical device company that is pioneering an innovative treatment for Chronic Obstructive Pulmonary Disease (COPD). Their therapy is intended to improve the delivery of oxygen to tissue to treat hypoxemia in COPD patients via the creation of a therapeutic fistula.

VytronUS

Series C in 2016
VytronUS, Inc. manufactures and markets cardiac medical devices. VytronUS, Inc. was formerly known as CardionUS, Inc. The company was founded in 2006 and is based in Sunnyvale, California.

Syntimmune

Series A in 2016
Syntimmune is a clinical-stage biotechnology company developing differentiated drug candidates in a wide range of autoimmune diseases. It is seeking advancing novel therapies based on its expertise in the biology of the neonatal Fc receptor (FcRn) and its role in the pathogenesis of IgG-mediated autoimmune diseases. Laurence and Richard Blumberg founded Syntimmune in 2013. Its headquarters is in Boston in Massachusetts.

Corvidia

Series A in 2016
Corvidia Therapeutics, Inc., a biotechnology company, develops precision cardiovascular therapies. The company was incorporated in 2014 and is based in Waltham, Massachusetts. As of July 31, 2020, Corvidia Therapeutics, Inc. operates as a subsidiary of Novo Nordisk A/S.

QualDerm Partners

Venture Round in 2016
QualDerm Partners provides strategic leadership and practice management services for dermatologists and skin care professionals across the southeastern United States, enabling them to focus more on patients and less on administrative efforts. They foster a practice-centric philosophy, which defines the culture that drives how they manage our business to provide the best care for the patients they serve.

Cure Forward

Venture Round in 2015
Cure Forward is a healthcare company that specializes in the fields of genomic medicine, consumer healthcare, oncology, and clinical trials. The company helps cancer patients and physicians access advanced treatments in oncology. It was founded in 2014 and is headquartered in Boston, Massachusetts.

Aileron Therapeutics

Series E in 2014
Aileron Therapeutics is a biopharmaceutical company that develops a class of drugs called Stapled Peptides. Stapled Peptides represent the first general solution for modulating intracellular protein-protein interactions that are critical control points to nearly all functions of a cell.

VytronUS

Series B in 2014
VytronUS, Inc. manufactures and markets cardiac medical devices. VytronUS, Inc. was formerly known as CardionUS, Inc. The company was founded in 2006 and is based in Sunnyvale, California.

Syntimmune

Series A in 2014
Syntimmune is a clinical-stage biotechnology company developing differentiated drug candidates in a wide range of autoimmune diseases. It is seeking advancing novel therapies based on its expertise in the biology of the neonatal Fc receptor (FcRn) and its role in the pathogenesis of IgG-mediated autoimmune diseases. Laurence and Richard Blumberg founded Syntimmune in 2013. Its headquarters is in Boston in Massachusetts.

Dermira

Series C in 2014
Dermira is a specialty biopharmaceutical company focused on bringing innovative and differentiated products to dermatologists and their patients. Dermira’s portfolio of five product candidates targets significant market opportunities. It was founded in 2010 and headquartered in Menlo Park, California.

Cerecor

Series B in 2014
Cerecor is a biopharmaceutical company focused on becoming a leader in the development and commercialization of treatments for immunologic, immuno-oncologic and rare genetic disorders. The company is advancing its clinical-stage pipeline of innovative therapies that address unmet patient needs within rare and orphan diseases. The company's rare disease pipeline includes CERC-801, CERC-802 and CERC-803, which are in development for congenital disorders of glycosylation and CERC-006, an oral mTORc1/c2 inhibitor in development for the treatment of complex lymphatic malformations. The company is also developing two monoclonal antibodies, CERC-002, and CERC-007. CERC-002 targets the cytokine LIGHT (TNFSF14) and is in clinical development for treatment of severe pediatric-onset Crohn's disease and COVID-19 acute respiratory distress syndrome. CERC-007 targets the cytokine IL-18 and is in clinical development for the treatment of Still’s disease (adult onset Still’s disease (AOSD) and systemic juvenile idiopathic arthritis (sJIA)) and multiple myeloma (MM). CERC-006, 801, 802 and 803 have all received Orphan Drug Designation and Rare Pediatric Disease Designation, which makes all four eligible for a priority review voucher upon FDA approval.

Tendyne Holdings

Series C in 2014
Tendyne Holdings, Inc. is a clinical stage medical device company focused on the development of minimally invasive therapies for the treatment of mitral regurgitation. Mitral regurgitation is a condition that afflicts hundreds of thousands of individuals worldwide every year. Formed in 2010, their first product concept is a transcatheter mitral valve replacement prosthesis for the treatment of mitral regurgitation. The intent is for the valve to be deployed and secured with no disruption to the native mitral annulus while preserving the sub-valvular apparatus. Placement of the valve is intended to be completed transapically in a simple procedure where the implanting physician is able to re-position, remove, and re-deploy their valve throughout the procedure.
Aurinia Pharmaceuticals is a clinical stage biopharmaceutical company focused on developing and commercializing therapies to treat targeted patient populations that are suffering from serious diseases with a high unmet medical need. The company is currently developing voclosporin, an investigational drug, for the potential treatment of lupus nephritis, focal segmental glomerulosclerosis, and Dry Eye Syndrome.

Aileron Therapeutics

Series E in 2013
Aileron Therapeutics is a biopharmaceutical company that develops a class of drugs called Stapled Peptides. Stapled Peptides represent the first general solution for modulating intracellular protein-protein interactions that are critical control points to nearly all functions of a cell.

Eledon Pharmaceuticals

Series E in 2013
Eledon Pharmaceuticals, Inc. is a specialty pharmaceutical company dedicated to developing products for patients with ear, nose, and throat disorders. The company's lead product, OP0201, is a surfactant-based nasal aerosol designed for individuals at risk of or suffering from otitis media, which is inflammation of the middle ear. In addition to OP0201, Eledon has developed foam-based drug delivery technologies, OP0101 and OP0102, aimed at administering medications to the ear, nose, and sinus cavities. Founded in 2004 and initially known as Novus Therapeutics, the company rebranded in January 2021 and is headquartered in Irvine, California.

Aileron Therapeutics

Series D in 2013
Aileron Therapeutics is a biopharmaceutical company that develops a class of drugs called Stapled Peptides. Stapled Peptides represent the first general solution for modulating intracellular protein-protein interactions that are critical control points to nearly all functions of a cell.

Eledon Pharmaceuticals

Series D in 2011
Eledon Pharmaceuticals, Inc. is a specialty pharmaceutical company dedicated to developing products for patients with ear, nose, and throat disorders. The company's lead product, OP0201, is a surfactant-based nasal aerosol designed for individuals at risk of or suffering from otitis media, which is inflammation of the middle ear. In addition to OP0201, Eledon has developed foam-based drug delivery technologies, OP0101 and OP0102, aimed at administering medications to the ear, nose, and sinus cavities. Founded in 2004 and initially known as Novus Therapeutics, the company rebranded in January 2021 and is headquartered in Irvine, California.
Gloucester Pharmaceuticals is a biopharmaceutical company owned by [Celgene](/organization/celgene) that acquires clinical-stage oncology drug candidates with the goal of advancing them through regulatory approval and commercialization. Gloucester's first compound, romidepsin, is a late-stage oncology drug candidate that has shown potential activity across a range of hematological malignancies. The Company retains worldwide exclusive rights to romidepsin, an oncology candidate within a new class of anti-cancer agents known as histone deacetylase (HDAC) inhibitors. Preclinical studies suggest that romidepsin is a potent inhibitor of Class I, Class II and Class IV HDACs.

Aileron Therapeutics

Series D in 2009
Aileron Therapeutics is a biopharmaceutical company that develops a class of drugs called Stapled Peptides. Stapled Peptides represent the first general solution for modulating intracellular protein-protein interactions that are critical control points to nearly all functions of a cell.

Eledon Pharmaceuticals

Series D in 2009
Eledon Pharmaceuticals is a clinical-stage biotechnology company using its expertise in targeting the CD40L pathway to develop potential treatments for people undergoing organ or cellular transplantation and for people with autoimmune and neurodegenerative diseases.

Aileron Therapeutics

Series C in 2008
Aileron Therapeutics is a biopharmaceutical company that develops a class of drugs called Stapled Peptides. Stapled Peptides represent the first general solution for modulating intracellular protein-protein interactions that are critical control points to nearly all functions of a cell.

Eledon Pharmaceuticals

Series B in 2007
Eledon Pharmaceuticals is a clinical-stage biotechnology company using its expertise in targeting the CD40L pathway to develop potential treatments for people undergoing organ or cellular transplantation and for people with autoimmune and neurodegenerative diseases.

Aileron Therapeutics

Series B in 2007
Aileron Therapeutics is a biopharmaceutical company that develops a class of drugs called Stapled Peptides. Stapled Peptides represent the first general solution for modulating intracellular protein-protein interactions that are critical control points to nearly all functions of a cell.

Aileron Therapeutics

Series A in 2006
Aileron Therapeutics is a biopharmaceutical company that develops a class of drugs called Stapled Peptides. Stapled Peptides represent the first general solution for modulating intracellular protein-protein interactions that are critical control points to nearly all functions of a cell.
Gloucester Pharmaceuticals is a biopharmaceutical company owned by [Celgene](/organization/celgene) that acquires clinical-stage oncology drug candidates with the goal of advancing them through regulatory approval and commercialization. Gloucester's first compound, romidepsin, is a late-stage oncology drug candidate that has shown potential activity across a range of hematological malignancies. The Company retains worldwide exclusive rights to romidepsin, an oncology candidate within a new class of anti-cancer agents known as histone deacetylase (HDAC) inhibitors. Preclinical studies suggest that romidepsin is a potent inhibitor of Class I, Class II and Class IV HDACs.

Cyrano Sciences

Venture Round in 2000
Cyrano Sciences, is focused on providing chemical and biological sensors and software solutions.
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