Bios Partners

Investor type

PE / VC

Founded

2020

AUM

$272 M

Location

Redwood City, California, United States

Investment Ticket

$10-50 m

Investment Stage

Seed Series A Series B Late Stage (Series C+)

Region of investment

North America
Investor profile last updated: 16 August, 2026

Profile

Bios Partners is a venture capital firm based in Fort Worth, Texas, founded in 2014 by Aaron Fletcher and Leslie W. Kreis, Jr. The firm focuses on identifying advanced biotech opportunities in overlooked and under-invested markets across the United States. With a team of 10 professionals, Bios Partners leverages its combined 80 years of experience in hedge funds, private equity, clinical drug development, and public pharma/biotech analysis to cultivate and bring innovative companies to market.

The firm invests in the healthcare and life sciences sectors, targeting seed-stage to later-stage companies. Bios Partners is particularly interested in disrupting geographic favoritism by investing in compelling science across the Central US. The firm manages several funds, including Bios Fund II NT, LP, with an AUM of $5 million. Their investment strategy includes a focus on the New England, Southeast, South, and West Coast regions of the United States.

Notable investments by Bios Partners include Actuate Therapeutics - drug discovery, Cognition Therapeutics - neurodegenerative disease treatment, Encore Vision - ophthalmic pharmaceuticals, I-Lumen Scientific - medical devices, and Immusoft - cell therapy. These investments highlight the firm's commitment to advancing healthcare innovations.

Industry

Biotechnology Healthcare Services Medical Devices Pharmaceuticals MedTech Life Sciences HealthTech

Bios Partners Funds

Name Type
Questionare
Industry
Questionare
Stage
Questionare
Region
Size AUM Launch date
Bios Fund II NT, LP
Private Equity (PE)
Venture Capital (VC)
Biotechnology
Healthcare Services
Medical Devices
Pharmaceuticals
HealthTech
Seed
Series A
Series B
Late Stage (Series C+)
North America
$5-10 m
$5 M
October 2018

Contacts

Name
Title
Email
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Aaron G.L. Fletcher, PhD Managing Partner & Co-Founder
Managing Partner & Co-Founder
a•••@•••
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Leslie W. Kreis, Jr. Managing Partner & Co-Founder
Managing Partner & Co-Founder
l•••@•••
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Investment-team contacts for Bios Partners — including verified work emails and LinkedIn profiles — are available to Private Equity List subscribers.
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FAQs about Bios Partners

Bios Partners is a venture capital and private equity firm. It backs companies at Seed, Series A, Series B and Late Stage (Series C+), writing tickets of $10-50 m.
Bios Partners is located in Redwood City, California, United States.
Bios Partners was founded in 2020.
Bios Partners invests in companies and startups in Biotechnology, Healthcare Services, Medical Devices, Pharmaceuticals, MedTech, Life Sciences, HealthTech.
Bios Partners invests in companies and startups in North America.
Bios Partners invests in companies and startups at Seed, Series A, Series B, Late Stage (Series C+).
Bios Partners usually invests $10-50 m on average.
Bios Partners has around $272m assets under management.
Bios Partners last fund was created/launched in 2018-10-01
Bios Partners can be reached through its website biospartners.com and its LinkedIn page. Its general enquiries address is [email protected]. Cold-mailing a general inbox rarely reaches a partner, so Private Equity List also lists the investment-team contacts for Bios Partners — names, roles, verified work emails and LinkedIn profiles — available on a Pro plan from $129/month (see pricing). Contacts are sourced from the firm's website and LinkedIn and re-verified on a rolling cycle. Spot a stale contact, or none at all? Report it — we re-run that firm within 48h and get back to you.
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Private Equity List re-verifies investor profiles on a rolling cycle, pulling from the firm's own website and LinkedIn rather than a one-off import. This profile was last updated on 16 August, 2026. Something out of date here? Report it — we re-run that firm within 48h and get back to you.