Founder Directory
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Founders7
Known for these resultsRole14%Role is parsed from founder titles in yc.db. Known for 14% 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-company29%Ex-company is matched from bios with employment context (ex-, formerly, worked at). 29% of these rows have at least one match.School14%School is matched from bios, case-sensitive for acronyms. 14% of these rows have at least one match.
- Pietari VirkkunenFounder · Last Accounting CompanyS26B2B · Helsinki
- Riki KarjalainenFounder · Last Accounting CompanyS26B2B · Helsinki
- Sami Laakkonen@samilaaFounder · Last Accounting CompanyS26B2B · Helsinki
- Veikko PereFounder · Last Accounting CompanyS26B2B · Helsinki
- David Newell@DavidNewell95Founder · End CloseW26B2B
- Sean Bolton@SeanBoltonFounder/CEO · End CloseW26B2B
- David AbusaidFounder · WeltioS22Fintech · Mexico City
FOUNDERROLEBATCHINDUSTRYLOCATIONTEAMX_url
Pietari VirkkunenLast Accounting CompanyFounderSummer 2026B2BHelsinki, Finland4—Riki KarjalainenLast Accounting CompanyFounderSummer 2026B2BHelsinki, Finland4—Sami LaakkonenLast Accounting CompanyFounderSummer 2026B2BHelsinki, Finland4https://x.com/samilaaVeikko PereLast Accounting CompanyFounderSummer 2026B2BHelsinki, Finland4—David NewellEnd Close2× YCFounderWinter 2026B2BUnknown2https://x.com/DavidNewell95Sean BoltonEnd CloseFounder/CEOWinter 2026B2BUnknown2https://x.com/SeanBoltonDavid AbusaidWeltioFounderSummer 2022FintechMexico City, Mexico15—
Showing 1–7 of 7 founders
Sean Bolton
Founder/CEO·End Close
PRIMARY INFO
RoleFounder/CEO
Team size2
BatchWinter 2026
Location
Company statusActive
StageEarly
BIO
Sean is the co-founder and CEO of End Close. Sean was the third hire at Modern Treasury (S18) where he spent 6 years as the tech lead of payments engineering before building and running the reconciliation org. While there he scaled the product to $350B in annual payments volume and $1T in annual reconciliation volume with 99.995% automation.
Ex-company, school and discipline below are derived from this bio. Nothing is inferred when the bio is missing.
BACKGROUND
No notable employer or school mentioned in the bio.
Credentialsnone mentioned
DisciplineEngineerKeyword match from the bio text, not a classifier.
TRACK RECORD
First YC company on record
COMPANY CONTEXT
End CloseAI powered reconciliation for high-volume payments companies
Co-foundersDavid Newell@DavidNewell95
