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Limited Competition: Small Grant Program for NHLBI K01/K08/K23/K25 Recipients (R03 Clinical Trial Optional)

National Institutes of Health

This is a Notice of Funding Opportunity (NOFO) for a Limited Competition that invites applications from eligible organizations to apply. Please see Section III. Eligibility for additional information. In accordance with NIH standard peer-review processes, the applications will be peer-reviewed, and

Funding
Estimated total program funding: $3,900,000
Category
Health & Medical
Status
OPEN
Deadline
11/8/2028

About

This is a Notice of Funding Opportunity (NOFO) for a Limited Competition that invites applications from eligible organizations to apply. Please see Section III. Eligibility for additional information. In accordance with NIH standard peer-review processes, the applications will be peer-reviewed, and only meritorious applications will be considered. The purpose of this NOFO is to solicit current or recently completed NHLBI K01, K08, K23, and K25 awardees for small grant support to expand their current research objectives or to branch out to a new study emerging from their K award research. This NOFO is intended to facilitate the transition to research independence for these NHLBI K awardees. Current NHLBI K01, K08, K23, and K25 awardees may apply for this R03 support starting in the third year of their K award Project Period. Recently completed NHLBI K01, K08, K23, and K25 award recipients are eligible to apply or resubmit A1 applications if the earliest potential R03 award start date is within two years of the end of their K award Project Period.The R03 grant mechanism supports research projects that can be completed within two years and with limited resources. These projects are expected to generate preliminary data to bolster a subsequent R01-equivalent application. Eligible projects include, but are not limited to, pilot or feasibility studies; proof of concept studies; secondary analysis of existing data; small, self-contained research projects; development of new research methodologies or technologies, or creation of novel experimental model systems.Applicants are required to maintain a minimum of 40% protected research effort during the R03 award period. This requirement can be fulfilled through a combination of effort on the proposed R03 project and other research projects, irrespective of funding source.For current and former K23 awardees, the research proposed in the R03 application may or may not include patient-oriented research.

Eligibility

Only the following NHLBI K01, K08, K23, and K25 awardees are eligible to apply for this funding opportunity.Refer to Section III. Eligibility Information in the NOFO for additional information on eligibility.Foreign Organizations/International Collaborations:Non-domestic (non-U.S.) Entities (Foreign Organizations) are not eligible to apply.Non-domestic (non-U.S.) components of U.S. Organizations are not eligible to apply.Foreign components, as defined in the NIH Grants Policy Statement, are not allowed.

Applicant types

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Notice-specific evidence check

What an applicant must verify for Limited Competition: Small Grant Program for NHLBI K01/K08/K23/K25 Recipients (R03 Clinical Trial Optional)

Applicant evidence

  • Applicant type: State governments
  • Applicant type: County governments
  • Applicant type: City or township governments
  • Applicant type: Special district governments
  • Applicant type: Independent school districts
  • Applicant type: Public and state-controlled institutions of higher education
  • Applicant type: Federally recognized tribal governments
  • Applicant type: Public housing authorities and Indian housing authorities

Opportunity boundaries

  • Recorded funding: Estimated total program funding: $3,900,000
  • Recorded deadline: November 8, 2028; confirm time zone and submission system.
  • Recorded focus: Health
Before investing in an application, connect every eligibility claim, required registration, submission component and deadline to the current official notice. Open the recorded official source →

Application checklist

How to apply for Limited Competition: Small Grant Program for NHLBI K01/K08/K23/K25 Recipients (R03 Clinical Trial Optional)

The steps below turn the recorded grant fields into a pre-submission check. They do not replace the current Notice of Funding Opportunity or its amendments.

Recorded eligibility

  • Applicant types: Grants.gov eligibility code 00, Grants.gov eligibility code 01, Grants.gov eligibility code 02, Grants.gov eligibility code 04, Grants.gov eligibility code 05, Grants.gov eligibility code 06.
  • Geographic scope is not structured in this record.
  • Notice summary: Only the following NHLBI K01, K08, K23, and K25 awardees are eligible to apply for this funding opportunity.Refer to Section III. Eligibility Information in the NOFO for additional information on eligibility.Foreign Organizations/International Collaborations:Non-domestic (non-U.S.) Entities (Foreign Organizations) are not eligible to apply.Non-domestic (non-U.S.) components of U.S. Organizations are not eligible to apply.Foreign components, as defined in the NIH Grants Policy Statement, are not allowed.

Focus areas: HL

Recorded deadline

November 7, 2028 — confirm the time zone and submission system

A missing or rolling date is not permission to assume an open application window.

  1. 1. Confirm fitMatch your applicant type, location, project scope and any cost-share or registration rule to the official notice.
  2. 2. Read the noticeCollect the current guidelines, amendments, budget rules, required attachments and submission instructions.
  3. 3. Check timingRecord the deadline time zone, internal review date and any earlier registration or portal cut-off.
  4. 4. Submit thereUse the official application route and save the confirmation or submission reference.

Official sources

Recorded source: https://www.grants.gov/xml-extract

Last directory verification: Sep 13, 2026.