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Breanna O'Reilly

Breanna O'Reilly

Analyst atRA Capital ManagementBoston, MA
RA Capital Management websiteFirm profile

Breanna O'Reilly is an Analyst at RA Capital Management, focusing on life sciences investments. She conducts due diligence on biotechnology companies and advises portfolio companies on strategy.

What Breanna can write

Writes checks of$3M to $30M+
Comes in atPre-seed, Seed, Series A, Series BCan lead the round
Ownership target7-10%At first check
Pitch pageSubmit on their siteThe firm asks founders to apply here.

RA Capital Management writes $3M to $30M+ checks, larger than 93% of firms in the atlas.

Bars: how many firms report each check band. Highlighted: RA Capital Management.

Focus

biotechnologymedical devicesdiagnosticsai-driven drug discovery

Education

Boston University, PhD in Biomedical EngineeringUniversity of Rochester, BS in Biomedical Engineering

Also at RA Capital Management

Adam Kaye
Adam KayeSenior Managing Director and Partner, Structured Capital
Emily Minkow
Emily MinkowManaging Director, Venture
Kyle Teamey
Kyle TeameyManaging Partner, Planetary Health
Laura Tadvalkar
Laura TadvalkarManaging Director, Venture
Nandita Shangari
Nandita ShangariManaging Director, Venture
Peter Kolchinsky
Peter KolchinskyManaging Partner
Rajeev Shah
Rajeev ShahManaging Partner
Tess Cameron
Tess CameronManaging Director, Venture

Partners like Breanna

At firms with a similar stage, sector and check size.

Ali Tamaseb
Ali TamasebGeneral Partner, DCVC
Colin Greenspon
Colin GreensponCo-Founder, Narya Capital
Po BronsonGeneral Partner & Managing Director, SOSV SF, SOSV SF & NY (Fka IndieBio)
David FriedbergCEO and Partner, The Production Board (TPB)
Pete Bastien
Pete BastienPresident & Partner, Hitachi Ventures
Andrew Beebe
Andrew BeebeManaging Director, Obvious Ventures

Alert me when RA Capital Management is active

One email when Breanna's firm raises a fund, adds a partner or shows new activity.

Founders and investors at a Mode VC gathering

Send Mode VC your deck

Raising a pre-seed or seed round? We write $1M to $5M first checks and help founders with distribution. A partner reads every deck.

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Questions

Who is Breanna O'Reilly?

Breanna O'Reilly is an Analyst at RA Capital Management, focusing on life sciences investments. She conducts due diligence on biotechnology companies and advises portfolio companies on strategy.

How much does Breanna O'Reilly invest?

Breanna O'Reilly invests through RA Capital Management, which writes checks of $3M to $30M+ at pre-seed, seed, series a, series b.

How do I pitch Breanna O'Reilly?

A warm intro from a founder RA Capital Management backed works best.

Last updated 2026-10-15. Is this you? Ask for a correction.