City Hill Ventures

City Hill Ventures, established in 2010, is a San Diego-based investment firm focusing on the healthcare sector. It primarily invests in seed and early-stage private companies, with a core focus on life sciences, including therapeutics, diagnostics, and medical devices, as well as healthcare technology.

Zachary Hornby

Operating Partner

17 past transactions

Maze Therapeutics

Venture Round in 2022
Maze Therapeutics is a biotechnology company focused on developing medicines that mimic the effects of rare, protective genetic variants to address unmet medical needs. Utilizing its Compass platform, the company identifies genetic variants associated with diseases and maps them to the biological pathways driving these conditions in specific patient populations.

OncoMyx Therapeutics

Series B in 2021
OncoMyx Therapeutics, Inc., established in 2018 and based in Phoenix, Arizona, specializes in the development of oncolytic immunotherapies. The company's core focus is the myxoma virus (MYXV), a unique oncolytic virus that targets both hematologic and solid tumors. OncoMyx's innovative approach involves a patented systemic delivery method, enabling the virus to be carried by human leukocytes to tumor cells, thereby stimulating an immune response to fight cancer.

OncoMyx Therapeutics

Series B in 2021
OncoMyx Therapeutics, Inc., established in 2018 and based in Phoenix, Arizona, specializes in the development of oncolytic immunotherapies. The company's core focus is the myxoma virus (MYXV), a unique oncolytic virus that targets both hematologic and solid tumors. OncoMyx's innovative approach involves a patented systemic delivery method, enabling the virus to be carried by human leukocytes to tumor cells, thereby stimulating an immune response to fight cancer.

Erasca

Series B in 2020
Erasca, Inc. is a clinical-stage precision oncology company based in San Diego, California, focused on discovering and developing therapies for patients with cancers driven by the RAS/MAPK pathway. Founded in 2018, the company employs an artificial intelligence drug discovery platform known as OPRA, which utilizes machine learning to analyze large-scale data sets and identify novel tumor biology, thereby accelerating drug development. Erasca is developing a pipeline of oncology drugs, including Naporafenib, an innovative pan-RAF inhibitor aimed at treating NRAS-mutant melanoma and other RAS/MAPK-driven tumors. Additionally, the company is advancing ERAS-007, an oral ERK1/2 inhibitor, and ERAS-601, an oral SHP2 inhibitor, targeting key nodes in the RAS/MAPK signaling pathway. Through its research and collaborations, Erasca aims to provide precision oncology options that offer potential solutions for treating and possibly curing cancer.

Maze Therapeutics

Venture Round in 2019
Maze Therapeutics is a biotechnology company focused on developing medicines that mimic the effects of rare, protective genetic variants to address unmet medical needs. Utilizing its Compass platform, the company identifies genetic variants associated with diseases and maps them to the biological pathways driving these conditions in specific patient populations.

Boundless Bio

Series A in 2019
Boundless Bio, Inc. is a clinical-stage biopharmaceutical company based in La Jolla, California, focused on developing innovative therapies for the treatment of aggressive cancers. The company specializes in targeting extrachromosomal DNA (ecDNA), a key factor in the amplification of oncogenes that affects over 14% of cancer patients. By investigating the biology of ecDNA, Boundless Bio aims to create transformative treatments for previously untreatable cancers. Its lead therapeutic candidate, BBI-355, is an oral selective inhibitor of checkpoint kinase 1 (CHK1) designed to manage the replication and transcription of ecDNA in cancer cells. Founded in 2018, Boundless Bio is committed to addressing the significant unmet medical needs of patients with oncogene amplified tumors.

OncoMyx Therapeutics

Series A in 2019
OncoMyx Therapeutics, Inc., established in 2018 and based in Phoenix, Arizona, specializes in the development of oncolytic immunotherapies. The company's core focus is the myxoma virus (MYXV), a unique oncolytic virus that targets both hematologic and solid tumors. OncoMyx's innovative approach involves a patented systemic delivery method, enabling the virus to be carried by human leukocytes to tumor cells, thereby stimulating an immune response to fight cancer.

Erasca

Series A in 2018
Erasca, Inc. is a clinical-stage precision oncology company based in San Diego, California, focused on discovering and developing therapies for patients with cancers driven by the RAS/MAPK pathway. Founded in 2018, the company employs an artificial intelligence drug discovery platform known as OPRA, which utilizes machine learning to analyze large-scale data sets and identify novel tumor biology, thereby accelerating drug development. Erasca is developing a pipeline of oncology drugs, including Naporafenib, an innovative pan-RAF inhibitor aimed at treating NRAS-mutant melanoma and other RAS/MAPK-driven tumors. Additionally, the company is advancing ERAS-007, an oral ERK1/2 inhibitor, and ERAS-601, an oral SHP2 inhibitor, targeting key nodes in the RAS/MAPK signaling pathway. Through its research and collaborations, Erasca aims to provide precision oncology options that offer potential solutions for treating and possibly curing cancer.

Bonti

Series C in 2018
Bonti, Inc. is a biotechnology company focused on developing neurotoxin products for both aesthetic and therapeutic uses. The company specializes in botulinum neurotoxin serotype E, offering two primary products: EB-001A for aesthetic applications and EB-001T for therapeutic indications. Bonti aims to provide solutions for patients experiencing muscle hyperactivity and associated musculoskeletal pain, addressing unmet medical needs with a long-acting, non-opioid local muscle relaxant that minimizes side effects common with existing treatments. Founded in 2015, Bonti was originally known as Endurance Biotech, Inc. and changed its name in August 2015. The company is headquartered in Newport Beach, California, and operates as a subsidiary of Allergan plc.

Bonti

Series B in 2017
Bonti, Inc. is a biotechnology company focused on developing neurotoxin products for both aesthetic and therapeutic uses. The company specializes in botulinum neurotoxin serotype E, offering two primary products: EB-001A for aesthetic applications and EB-001T for therapeutic indications. Bonti aims to provide solutions for patients experiencing muscle hyperactivity and associated musculoskeletal pain, addressing unmet medical needs with a long-acting, non-opioid local muscle relaxant that minimizes side effects common with existing treatments. Founded in 2015, Bonti was originally known as Endurance Biotech, Inc. and changed its name in August 2015. The company is headquartered in Newport Beach, California, and operates as a subsidiary of Allergan plc.

Flex Pharma

Venture Round in 2014
Flex Pharma, Inc. is a biotechnology company focused on developing and commercializing innovative treatments for muscle cramps, spasms, and spasticity related to neurological conditions and exercise-associated muscle cramps. Founded in 2014 and headquartered in Boston, Massachusetts, the company operates in two segments: Consumer Operations and Drug Development. Its lead drug candidate, FLX-787, is a dual transient receptor potential V1/A1 ion channel activator that has completed an exploratory Phase II clinical trial in Australia for patients with multiple sclerosis. Additionally, Flex Pharma offers HOTSHOT, a consumer beverage designed to prevent and treat exercise-associated muscle cramps, which is marketed through its direct-to-consumer website and third-party platforms. In 2019, Flex Pharma was acquired by Salarius Pharmaceuticals, marking a significant shift in its operational structure.

Independa

Series B in 2014
Independa is a San Diego-based provider of cloud-based software solutions for senior living and home-based care. The company offers a remote care platform that integrates social engagement, reminders for medications and appointments, health monitoring, and activity calendars, along with an enterprise suite that centralizes remote care and well-being tools for senior living communities, short-term rehabilitation facilities, hospitals, and home care organizations. Its products include AnyTV Companion for social connection and caregiving support, CloudCare for modular remote care and wellness, a caregiver dashboard, and Angela, a solution helping seniors maintain independence. The platform connects health devices and home sensors to monitor vital signs and safety, supports broadcast alerts to residents, and enables efficient caregiver workflows through a unified cloud-based service. Independa collaborates with partners, including LG Electronics. Founded in 2009, the company serves organizations seeking technology-enabled independent living and enhanced care coordination.

Independa

Series A in 2013
Independa is a San Diego-based provider of cloud-based software solutions for senior living and home-based care. The company offers a remote care platform that integrates social engagement, reminders for medications and appointments, health monitoring, and activity calendars, along with an enterprise suite that centralizes remote care and well-being tools for senior living communities, short-term rehabilitation facilities, hospitals, and home care organizations. Its products include AnyTV Companion for social connection and caregiving support, CloudCare for modular remote care and wellness, a caregiver dashboard, and Angela, a solution helping seniors maintain independence. The platform connects health devices and home sensors to monitor vital signs and safety, supports broadcast alerts to residents, and enables efficient caregiver workflows through a unified cloud-based service. Independa collaborates with partners, including LG Electronics. Founded in 2009, the company serves organizations seeking technology-enabled independent living and enhanced care coordination.

Ignyta

Series B in 2012
Ignyta, Inc. is a biotechnology company focused on discovering, developing, and commercializing molecularly targeted therapies aimed at treating cancer and autoimmune diseases. Established in 2011 and based in San Diego, California, Ignyta is dedicated to advancing personalized medicine by integrating therapeutic approaches with companion diagnostics. Its notable products include entrectinib, a tyrosine kinase inhibitor targeting various receptor proteins, and RXDX-105, which is designed for RET-driven solid tumors. The company seeks to improve treatment outcomes by identifying patients most likely to benefit from specific therapies through biomarker-based diagnostics. In 2018, Ignyta became a subsidiary of Roche Holdings, further enhancing its capabilities in precision medicine.

Independa

Venture Round in 2012
Independa is a San Diego-based provider of cloud-based software solutions for senior living and home-based care. The company offers a remote care platform that integrates social engagement, reminders for medications and appointments, health monitoring, and activity calendars, along with an enterprise suite that centralizes remote care and well-being tools for senior living communities, short-term rehabilitation facilities, hospitals, and home care organizations. Its products include AnyTV Companion for social connection and caregiving support, CloudCare for modular remote care and wellness, a caregiver dashboard, and Angela, a solution helping seniors maintain independence. The platform connects health devices and home sensors to monitor vital signs and safety, supports broadcast alerts to residents, and enables efficient caregiver workflows through a unified cloud-based service. Independa collaborates with partners, including LG Electronics. Founded in 2009, the company serves organizations seeking technology-enabled independent living and enhanced care coordination.

Eclipse Therapeutics

Seed Round in 2011
Eclipse Therapeutics, Inc. is a private biotechnology company focused on the discovery and development of innovative therapeutics aimed at targeting cancer stem cells (CSCs). The company employs a unique biotechnology platform to create novel therapeutic products that address various forms of cancer treatment. Through its specialized approach, Eclipse Therapeutics seeks to advance the understanding and management of cancer by developing effective solutions that specifically target the underlying mechanisms of cancer stem cells.

Independa

Venture Round in 2011
Independa is a San Diego-based provider of cloud-based software solutions for senior living and home-based care. The company offers a remote care platform that integrates social engagement, reminders for medications and appointments, health monitoring, and activity calendars, along with an enterprise suite that centralizes remote care and well-being tools for senior living communities, short-term rehabilitation facilities, hospitals, and home care organizations. Its products include AnyTV Companion for social connection and caregiving support, CloudCare for modular remote care and wellness, a caregiver dashboard, and Angela, a solution helping seniors maintain independence. The platform connects health devices and home sensors to monitor vital signs and safety, supports broadcast alerts to residents, and enables efficient caregiver workflows through a unified cloud-based service. Independa collaborates with partners, including LG Electronics. Founded in 2009, the company serves organizations seeking technology-enabled independent living and enhanced care coordination.
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