Founder Directory
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Founders8
Known for these resultsRole13%Role is parsed from founder titles in yc.db. Known for 13% 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-company25%Ex-company is matched from bios with employment context (ex-, formerly, worked at). 25% of these rows have at least one match.School50%School is matched from bios, case-sensitive for acronyms. 50% of these rows have at least one match.
- Pablo Hansen@thepablohansenFounder · ProliferateS25B2B · San Francisco
- Christopher PriceFounder/COO · SixtyfourX25B2B · San Francisco
- Chris WeaverFounder · OnyxW24B2B · San Francisco
- Yuhong SunFounder · OnyxW24B2B · San Francisco
- Jen HerbachFounder · Adventris PharmaceuticalsW23Healthcare · Baltimore
- Douglas LopesFounder · Onyx PrivateW22Fintech · Miami
- Tiago PassinatoFounder · Onyx PrivateW22Fintech · Miami
- Victor Santos@victorsantos10xFounder · Onyx PrivateW22Fintech · Miami
FOUNDERROLEBATCHINDUSTRYLOCATIONTEAMX_url
Pablo HansenProliferateFounderSummer 2025B2BSan Francisco, United States—https://x.com/thepablohansenChristopher PriceSixtyfourFounder/COOSpring 2025B2BSan Francisco, United States12—Chris WeaverOnyxFounderWinter 2024B2BSan Francisco, United States20—Yuhong SunOnyxFounderWinter 2024B2BSan Francisco, United States20—Jen HerbachAdventris PharmaceuticalsFounderWinter 2023HealthcareBaltimore, United States7—Douglas LopesOnyx PrivateFounderWinter 2022FintechMiami, United States10—Tiago PassinatoOnyx PrivateFounderWinter 2022FintechMiami, United States10—Victor SantosOnyx PrivateFounderWinter 2022FintechMiami, United States10https://x.com/victorsantos10x
Showing 1–8 of 8 founders
William Collis
Founder·Adventris Pharmaceuticals
PRIMARY INFO
RoleFounder· not in title
Team size7
BatchWinter 2023
LocationBaltimore, United States
Company statusActive
StageEarly
BIO
William Collis is a serial entrepreneur with multiple exits, most recently the data platform Genji. His research has been published in Harvard Business review and featured as a TED talk with over 1.5M views. He holds an MBA from Harvard Business School where he was named a Baker Scholar. He is lifelong friends with his co-founders Jen Herbach and Mark Yarchoan, since meeting as roommates at Amherst College.
Ex-company, school and discipline below are derived from this bio. Nothing is inferred when the bio is missing.
BACKGROUND
CredentialsMBA
DisciplineResearcherKeyword match from the bio text, not a classifier.
TRACK RECORD
Serial founder · self-declared
COMPANY CONTEXT
Adventris PharmaceuticalsAdventris makes cancer vaccines
