Founder Directory
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Founders30
Known for these resultsRole60%Role is parsed from founder titles in yc.db. Known for 60% of these rows — the rest have no title at all, mostly 2019–2023. Those rows stay in the result and are counted as Unknown, never as No.Bio100%Bio coverage: 100% of these founders have a bio on their YC profile. Every bio-derived facet (ex-company, school, credentials, discipline) is Unknown for the rest.Ex-company40%Ex-company is matched from bios with employment context (ex-, formerly, worked at). 40% of these rows have at least one match.School100%School is matched from bios, case-sensitive for acronyms. 100% of these rows have at least one match.
- David HwangFounder/CEO · GrocaloS26Consumer · Los Angeles
- Carl Stauffer@carlstauffer_Founder/CEO · RiftenS26B2B · San Francisco
- Meer Patel@_meerpatelFounder/CEO · PranaW26Healthcare · San Francisco
- Abdelrahman HamimiFounder/CTO · Scheduling WizardW26Healthcare · Washington
- Samuel Oberly@samob917Founder/CEO · Scheduling WizardW26Healthcare · Washington
- Zachary DermodyFounder/COO · Scheduling WizardW26Healthcare · Washington
- Sydney KatzFounder/CTO · ValgoW26B2B · San Francisco
- Jonathan Miranda@jonathan_mir12Founder/CEO · CompyleF25B2B · San Francisco
- Kevin XieFounder/CEO · SorenF25B2B · San Francisco
- Shayaan EmranFounder/CTO · DeepGroveS25B2B · San Francisco
- Akhil GuptaFounder/CTO · FrescoF24Real Estate and Construction · San Francisco
- Derek ModzelewskiFounder/CTO · RewbiS24Industrials · San Francisco
- Thomas MargeFounder/CEO · RewbiS24Industrials · San Francisco
- Dave FeldmanFounder/CEO · GreenboardW24Fintech · New York
- Edward SchemborFounder/CTO · GreenboardW24Fintech · New York
- Soo Yung ChoFounder/CTO · PowderW24Fintech · San Francisco
- Ryan Chow@ryanchowwwFounder · MetalwareS23B2B · San Francisco
- Mark Yarchoan@markyarchoanFounder · Adventris PharmaceuticalsW23Healthcare · Baltimore
- Akash Mandavilli@AkashMandavill4Founder · GovEagleW23Government · New York
- Gabe Villasana@GabeVillasanaFounder · GovEagleW23Government · New York
FOUNDERROLEBATCHINDUSTRYLOCATIONTEAMX_url
David HwangGrocaloFounder/CEOSummer 2026ConsumerLos Angeles, United States0—Carl StaufferRiftenFounder/CEOSummer 2026B2BSan Francisco, United States0https://x.com/carlstauffer_Meer PatelPranaFounder/CEOWinter 2026HealthcareSan Francisco, United States4https://x.com/_meerpatelAbdelrahman HamimiScheduling WizardFounder/CTOWinter 2026HealthcareWashington, United States3—Samuel OberlyScheduling WizardFounder/CEOWinter 2026HealthcareWashington, United States3https://x.com/samob917Zachary DermodyScheduling WizardFounder/COOWinter 2026HealthcareWashington, United States3—Sydney KatzValgoFounder/CTOWinter 2026B2BSan Francisco, United States3—Jonathan MirandaCompyleFounder/CEOFall 2025B2BSan Francisco, United States2https://x.com/jonathan_mir12Kevin XieSorenFounder/CEOFall 2025B2BSan Francisco, United States——Shayaan EmranDeepGroveFounder/CTOSummer 2025B2BSan Francisco, United States3—Akhil GuptaFrescoFounder/CTOFall 2024Real Estate and ConstructionSan Francisco, United States2—Derek ModzelewskiRewbiFounder/CTOSummer 2024IndustrialsSan Francisco, United States3—Thomas MargeRewbi2× YCFounder/CEOSummer 2024IndustrialsSan Francisco, United States3—Dave FeldmanGreenboardFounder/CEOWinter 2024FintechNew York, United States26—Edward SchemborGreenboardFounder/CTOWinter 2024FintechNew York, United States26—Soo Yung ChoPowderFounder/CTOWinter 2024FintechSan Francisco, United States6—Ryan ChowMetalwareFounderSummer 2023B2BSan Francisco, United States4https://x.com/ryanchowwwMark YarchoanAdventris PharmaceuticalsFounderWinter 2023HealthcareBaltimore, United States7https://x.com/markyarchoanAkash MandavilliGovEagleFounderWinter 2023GovernmentNew York, United States25https://x.com/AkashMandavill4Gabe VillasanaGovEagleFounderWinter 2023GovernmentNew York, United States25https://x.com/GabeVillasana
Showing 1–20 of 30 founders
Mark Yarchoan
Founder·Adventris Pharmaceuticals
PRIMARY INFO
RoleFounder· not in title
Team size7
BatchWinter 2023
LocationBaltimore, United States
Company statusActive
StageEarly
BIO
Mark Yarchoan, M.D, is an Associate Professor of Medical Oncology at Johns Hopkins. Dr. Yarchoan runs an NCI-funded laboratory focused on developing novel immunotherapies, with a focus on cancer vaccines. He has led multiple international clinical trials of immunotherapy agents including neoantigen-targeted cancer vaccines. Dr. Yarchoan has received multiple honors, including the ASCO Young Investigator Award and the ASCO Career Development Award.
Ex-company, school and discipline below are derived from this bio. Nothing is inferred when the bio is missing.
BACKGROUND
CredentialsMD
DisciplineResearcherKeyword match from the bio text, not a classifier.
TRACK RECORD
First YC company on record
COMPANY CONTEXT
Adventris PharmaceuticalsAdventris makes cancer vaccines
