Fundraising Fox

🦊/People

Ethan Pronev

Founder

Founder at Approxima

New York, New York, United States

FoundedApproxima · YC

Find your path to Ethan

238 people in our graph share verified history with Ethan — schools, employers, funds. One of them is your warm intro.

Achintya ChaudhariunlockedEthan: together at University of Waterloo (2020–2021)

×4Ethan: together at International Baccalaureate

×2Ethan: together at Citadel Securities

Ethan: together at University of Waterloo

About

Ethan Pronev worked on trading systems at Jane Street and Citadel Securities, and is a computer science graduate from the University of Waterloo. He is co-founder of Approxima.

Founder at Approxima YC W26

Intro paths

YC

Ethan went through Y Combinator (Winter 2026) — any YC alum in your network can reach them through the YC community.

GP

Their group partner at YC was Diana Hu, General Partner at Y Combinator — the partner who ran Approxima's batch and knows the company first-hand. YC profile ↗

→

In turn, Ethan can intro founders to Approxima's investors below.

Approxima's investors · 1

Y CombinatorSan Francisco · $500K checks · since 2026

Co-founders at Approxima

AS

Ashish Selvaraj

Ashish SelvarajFounder

Experience

Approxima (YC W26)Foundercurrent2025 — presentSan Francisco, CA
Citadel SecuritiesSoftware Engineer Intern2024New York, New York, United States
Jane StreetSoftware Engineer Intern2024New York, New York, United States
Squarepoint CapitalSoftware Engineer Intern2022Montreal, Quebec, Canada
BitGoSoftware Engineer Intern2022Palo Alto, California, United States

Frequently asked questions

Who is Ethan Pronev?: Ethan Pronev worked on trading systems at Jane Street and Citadel Securities, and is a computer science graduate from the University of Waterloo. He is co-founder of Approxima.
Where does Ethan Pronev work?: Ethan Pronev is Founder of Approxima.
What companies did Ethan Pronev found?: Ethan Pronev founded Approxima.
Where did Ethan Pronev go to school?: Ethan Pronev studied at University of Waterloo (Bachelor's degree, Computer Science (Co-op)); International Baccalaureate (Erindale Secondary School).

Founder mafias

Y Combinator mafia10,230

Also came through, then founded or led a company.

Sam AltmanPresidentFounded Tools for Humanity +3 Garry TanPresident & CEOFounded Y Combinator +1 Jessica LivingstonCo-founderFounded Y Combinator Alexis OhanianPartnerFounded Reddit Fred EhrsamYC Summer 2012Founded Nudge +1 Matt HuangYC Winter 2011Founded Paradigm +1

+ 10,223 more

University of Waterloo mafia346

Also came through, then founded or led a company.

Chamath PalihapitiyaB.A.Sc.Founded 8090 Apoorva MehtaBAScFounded Instacart Jon LernerBachelor of Applied ScienceFounded Textnow +2 Michael LittBASc. Honours Systems Design EngineeringFounded Garage Capital +1 Mike McCauleyBAScFounded Garage Capital +1 Zach WaterfieldComputer EngineeringFounded Zettlor +1

+ 339 more

International Baccalaureate mafia45

Also came through, then founded or led a company.

JJ TangSuzhou Singapore International SchoolFounded Rootly +1 Aleksandra Pedraszewska33. N. Copernicus High School in WarsawFounded VividQ 3Dホログラフィーのプラットフォーム基盤 +1 Teddy JungreisInternational Baccalaureate Diploma Recipient at Winter Park High SchoolFounded Winible Raymundo GonzalezIB DiplomaFounded Eden Sourav SanyalCOMPUTER SCIENCE - HLFounded AvairSense Max KazakovFounded Coperniq

+ 38 more

BitGo mafia6

Also came through, then founded or led a company.

David SacksDirectorFounded Yammer Brian BrooksMember, Board of DirectorsFounded Bitfury Daniel DriscollDirector Of EngineeringFounded Elodin Gurshabd Singh VaraichSoftware Engineer InternFounded Definite Josh SchwartzVice President of SalesFounded Fordefi

BitGo mafia5

Also came through, then founded or led a company.

Brian BrooksMember, Board of DirectorsFounded Bitfury Daniel DriscollDirector Of EngineeringFounded Elodin Gurshabd Singh VaraichSoftware Engineer InternFounded Definite Josh SchwartzVice President of SalesFounded Fordefi

Same school

Also attended University of Waterloo646

Chamath PalihapitiyaFounder & CEO of Social Capital Apoorva MehtaFounder of Instacart; founder of Cloud Health Systems Achintya ChaudhariInvestor at Lightbank Karim GillaniGeneral Partner at Luge Capital Rohan MongaInvestment Associate at Luge Capital Andrew MiklasGeneral Partner at Y Combinator

+ 640 more

Also attended International Baccalaureate118

Jessica WangFP&A Manager at March Capital Partners Gustavo González de la PeñaAnalyst at Inveready Technology Investment Group Conrad SchooInvestor at EQT Ventures Maximilian SamneInvestor at EQT Ventures Danny EdmanInvestor at Alpha Partners Hari GopalDirector of Corporate Insights at Tech Square Ventures

+ 112 more

Shared employers

Also worked at Approxima (YC W26)1

Ashish SelvarajFounder at Approxima

Also worked at Citadel Securities32

Alfred LinPartner at Sequoia Capital Konstantine BuhlerInvestor at Sequoia Capital Rama SomayajulaHead of Trading at Paradigm Julia HitchinsInvestor at Positive Sum Capital Qingwen RenCofounder at Mulana Capital Vidur GuptaVice President at Frontenac

+ 26 more

Also worked at Jane Street60

Guillaume LampleCo-founder & Chief Scientist of Mistral AI Arvid LunnemarkFounder of Integrous Research; co-founder of Cursor Olaoluwa OguneyeInvestor at Dorm Room Leigh Marie BraswellPartner at KPCB Sophia LuoPartner at Greylock Partners Chang XuPartner at Basis Set Ventures

+ 54 more

Also worked at Squarepoint Capital12

Valentin MihovCEO at Enflux Andrew BradyInvestor at Anza Partners Kevin ChengFounder at Decoda Health Tahmid JamalFounder at Yondu Skandere SahliFounder at Sandra AI Mattia MauroFounder at Excellence Learning

+ 6 more