How many investments has Johnston Associates Inc. made?

Johnston Associates Inc. has 10 tracked investments.

What stage does Johnston Associates Inc. invest at?

Johnston Associates Inc. invests at the Pre-Seed, Seed, Series A stages.

What is Johnston Associates Inc.'s typical check size?

Johnston Associates Inc. typically writes checks of $300K – $3M.

What sectors does Johnston Associates Inc. focus on?

Johnston Associates Inc. focuses on Biotech, Cleantech, Healthtech, Medical Devices.

Where is Johnston Associates Inc. located?

Johnston Associates Inc. is headquartered in Princeton, US.

Does Johnston Associates Inc. lead rounds?

Yes, Johnston Associates Inc. leads investment rounds.

Johnston Associates Inc.

Venture capital

Princeton · Pre-Seed–Series A · 1 people tracked

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Investment thesis

JAI provides seed capital and hands-on managerial and technical support to early-stage healthcare, pharmaceutical, and biotechnology companies. It launches companies around unique, commercially promising technologies and also finances more established small companies with growth potential. The firm invests its own private capital and does not manage a fund, so it has no fixed horizons, return targets, or size limits. Because startups are time-consuming, JAI typically invests in roughly one enterprise per year. It leverages an extensive network across academia, venture capital, and medical communities to secure ongoing capital, R&D, regulatory, and personnel support, applying stringent criteria on science, market potential, uniqueness, and co-founder quality.

Invests inBiotech Cleantech Healthtech Medical Devices Princeton United States

Source: firm website, verified Aug 3, 2026.

Stage

Pre-Seed–Series A

Check

$300K – $3M

Princeton, New Jersey, US

Leads rounds

Leads

Instruments

Equity

Founded

1968

AUM

$100M

Tracked investments

Team · 1 people

from public directories

Robert F. Johnston· Founder

Also known as Bob Johnston, he founded Johnston Associates in 1968 to provide merger advisory and financing for emerging technology-intensive companies, later focusing on biotechnology and healthcare. He founded companies including Cytogen, Ecogen, Sepracor, i-STAT, Envirogen, and Praelux, was previously an investment banker at F.S. Smithers & Co. and Smith Barney & Co., and holds a B.A. from Princeton and an M.B.A. from New York University.

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Investments · 10 tracked

founders shown can be your intro path

Biocyte

PartnerRobert F. Johnston· solo GP

Cytogen

PartnerRobert F. Johnston· solo GP

Ecogen

PartnerRobert F. Johnston· solo GP

Envirogen

PartnerRobert F. Johnston· solo GP

i-STAT

PartnerRobert F. Johnston· solo GP

Immunicon

PartnerRobert F. Johnston· solo GP

Praelux

PartnerRobert F. Johnston· solo GP

Sepracor

PartnerRobert F. Johnston· solo GP

Sonomed

PartnerRobert F. Johnston· solo GP

VelaPharm

PartnerRobert F. Johnston· solo GP

Frequently asked questions

How many investments has Johnston Associates Inc. made?: Johnston Associates Inc. has 10 tracked investments.
What stage does Johnston Associates Inc. invest at?: Johnston Associates Inc. invests at the Pre-Seed, Seed, Series A stages.
What is Johnston Associates Inc.'s typical check size?: Johnston Associates Inc. typically writes checks of $300K – $3M.
What sectors does Johnston Associates Inc. focus on?: Johnston Associates Inc. focuses on Biotech, Cleantech, Healthtech, Medical Devices.
Where is Johnston Associates Inc. located?: Johnston Associates Inc. is headquartered in Princeton, US.
Does Johnston Associates Inc. lead rounds?: Yes, Johnston Associates Inc. leads investment rounds.

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