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Heart Rhythm Society Inc at a glanceAlso receives grants: funding profile →

· Public charity

Heart Rhythm Society Inc

To improve the care of patients by promoting education, research and optimal health care policies and standards.

$244k
Granted FY2025still arriving
7
Grants FY2025still arriving
6
States reached
$50k
Largest
01What it fundsRead
02The needRead
03Its granteesRead
04Its fieldRead
01What it funds
01100% classified

What it funded, over time

Every grant placed by its stated purpose and the recipient’s mission, by year, FY2019 to 2025.

Health$985kEducation$200kEmployment$55kScience & Tech$50kCommunity Improvement$30k
02FY2025 · 7 grants

Where the money goes

Grants by size, and the largest recipients.

How this is measured
The 7 grants below total $205,000, the rows itemized in this filing. The $244,000 headline is the total grant expense on the return; the other $39,000 is giving the schedule does not break out (grants under the $5,000 itemization floor, grants to individuals, grants on other schedules). Every figure below describes the itemized rows only.

By grant size · FY2025

  • $10k–50k5 grants · $105k
  • $50k–250k2 grants · $100k
$30,000
Median grant
6
States reached
$17M
Total assets
Largest grants
RecipientAmount
UNIVERSITY OF ARIZONA$50,000
UNIVERSITY OF WASHINGTON$50,000
REGENTS OF THE UNIVERSITY OF CA$37,500
LUMIA HEALTH INC$30,000
INOMAGEN THERAPEUTICS INC$15,000
UNIVERSITY OF CALIFORNIA$12,500
CONFORM MEDICAL INC$10,000
02The need
03

Does the money reach high-need areas?

Each grant placed by the hardship in its grantee’s ZIP, against the area’s typical level.

show:

Dollar for dollar, its grants (FY19–25) land where the poverty rate runs at 14%, against an area that typically sits at 11%. 70% of its dollars go to grantees based in above-average-need neighborhoods. Most of its grants land in higher-need ZIPs.

area typical 11%Anumana Inc: $10k → 8%LUMIA HEALTH INC: $30k → 16%Mayo Clinic: $50k → 9%Stanford University: $50k → 7%REGENTS OF THE UNIVERSITY OF CA: $38k → 9%RCE TECHNOLOGIES: $15k → 11%REGENTS UNIVERSITY OF CALIFORNIA: $50k → 14%UNIVERSITY OF CALIFORNIA: $13k → 16%VPG MEDICAL: $10k → 14%NYU Grossman School of Medicine: $50k → 17%Baylor College: $50k → 16%BAYLOR COLLEGE OF MEDICINE: $50k → 19%UNIVERSITY OF WISCONSIN: $50k → 10%Vanderbilt University: $50k → 14%KILELE HEALTH: $15k → 14%THE OHIO STATE UNIVERSITY: $50k → 15%TeleHealth Care Solutions LLC: $15k → 17%UNIVERSITY OF WASHINGTON: $50k → 9%INOMAGEN THERAPEUTICS INC: $15k → 14%Johns Hopkins University: $50k → 19%DYNOCARDIA: $30k → 8%New York University School of Medicine: $50k → 17%The Ohio State University: $50k → 15%NEW YORK UNIVERSITY: $50k → 17%The Ohio State University: $50k → 15%CONFORM MEDICAL INC: $10k → 17%Ximio Health Inc: $30k → 17%0%20%40%50%more need →
grant to an above-average-need area below average· circle size = grant amount
How this is measured
Matched: human-services grants are those whose grantee’s IRS cause code is Human Services. Placed by people below the poverty line in the grantee’s ZIP, averaged from the tracts in that ZIP.

Which US states its grants reach

VT
WA
MN
IL
WI
NY
MA
OH
CA
MD
AZ
TN
TX
How this is measured
US grants placed by each grantee’s ZIP, which can differ from where services are delivered. Need from public data (U.S. Census/ACS, CDC PLACES, Eviction Lab, USDA), shown as context about the area, never attributed to the funder’s giving.
04

Where the work is directed

The same grants placed two ways: where each recipient sits, and where its stated purpose sends the money.

About 20% of Heart Rhythm Society Inc’s grant dollars are earmarked for a different county than the recipient’s own address.

Heart Rhythm Society Inclessmore of its giving
Placed by recipient address · 3.0% directed abroad (not shown)
How this is measured
Recipient view: each grant at its grantee’s ZIP, mapped to a county. Directed view: each grant at the county its stated purpose names, falling back to the recipient’s county when the purpose names no place; US grants only. A county shows only if it carries the top 95% of that view’s dollars. Purposes are read from the funder’s own 990 grant descriptions.
03Its grantees
repeat funding

Who it funds again

Organizations funded in more than one year, against those funded once.

49%of every dollar goes to organizations it has funded before.
$550k · 4 repeat orgs$570k to everyone else

4 repeat relationships: 0 still active in FY2025, 4 since wound down; 6 grantees were first funded in FY2025 (too recent to call).

How the two cohorts compare

Re-uppedFunded once

Organizations

4
14

Total granted

$550k
$415k

Median revenue growth · since first grant

+30%
+56%

Still filing today

75%
14%

New vs renewed · share of each year

In FY2025, 0% of grant dollars renewed an existing relationship; $155k went to new ones.

50%100%’19’21’22’23’24’25
RenewedFirst-time

Where new relationships form · theme of each grantee’s first grant

’19’21’22’23’24’25
EducationHealthOther
How this is measured
First-time means a grantee’s first year in the filing window; renewed means funded in an earlier year too. The renewed share climbs naturally as a portfolio matures, so the signal is a year that bucks it (a wave of new grantees). The earliest year is left-censored: relationships that predate the data read as new. Theme is the grantee’s IRS cause.

Backed again, and grew

  • NY
    New York University
    3× · 2019–2024 · $150k · revenue +51%
  • JOHNS HOPKINS UNIVERSITY
    3× · 2019–2024 · $150k · revenue +25%
  • TU
    THE UNIVERSITY OF VERMONT MEDICAL CENTER
    2× · 2022–2023 · $100k · revenue +30%

Funded once

  • BC
    BAYLOR COLLEGE OF MEDICINE
    one grant, 2024 · $50k
  • UO
    University of Wisconsin Madison
    one grant, 2023 · $50k
  • BC
    Baylor College of Medicinegraduated
    one grant, 2019 · $50k · revenue +47%
How this is measured

Repeat means funded in two or more distinct years. Growth and survival are read from each grantee’s own subsequent IRS filings.

04Its field

Closest unfunded matches

The nonprofits that most resemble its grantees but are not funded by it, scored along the direction from the rest of the field toward the portfolio. A resemblance in what they say they do, not a recommendation.

1
University of Minnesota Physicians

University of minnesota physicians serves as the integrated group practice for the university of minnesota medical school full-time faculty to provide the highest quality healthcare to patients and their families.university of minnesota…

Health
2
University of Southern California

The central mission of the university of southern california is the development of human beings and society as a whole through the cultivation and enrichment of the human mind and spirit. the principal means by which our mission is…

Education
3
The Johns Hopkins Hospital

For more than 125 years, the mission of the johns hopkins hospital has been to lead the world in the diagnosis and treatment of disease and to train tomorrow's great physicians, nurses and scientists. above all, we aim to provide the…

Health
4
Fred Hutchinson Cancer Center

Fred hutch cancer center ("fred hutch") unites innovative research and compassionate care to prevent and eliminate cancer and infectious disease. continued on schedule o

Health
5
University of Miami

See Form 990, Part I, Line 1, Description of Organization Mission.

Education
6
Rush University Medical Center

The mission of Rush is to improve the health of the individuals and diverse communities we serve through the integration of outstanding patient care, education, research and community partnerships.

Health
7
Cornell University

Education, research, medical services and other public services.

Education
8
Washington University

The washington university is a co-educational, nondenominational university with a long and distinguished history of teaching, research and (cont'd on schedule o)

Education
9
University of Chicago Medical Center

Our mission at the university of chicago medicine is to provide superior health care through rigorous research, innovative education, and comprehensive care and healing. in partnership with our colleagues, we pursue life-changing…

Health
10
William Marsh Rice University

As a leading research university with a distinctive commitment to undergraduate education, Rice University aspires to path breaking research, unsurpassed teaching, and contributions to the betterment of our world. It seeks to fulfill this…

Education
11
Truman Medical Center Incorporated

University health is an academic health center providing accessible, state-of-the-art quality healthcare to our community regardless of the ability to pay.

Health
12
Thomas Jefferson University

Thomas jefferson university ("tju") is a comprehensive university with preeminence in transdisciplinary, experiential professional education, research and discovery, delivering exceptional value for the 21st century students with…

Education
How this is measured
The grantee most central to the portfolio’s shape is Baylor College of Medicine; the most unlike its peers is The Uc Davis Foundation. Resemblance is measured on each organization’s own IRS 990 mission text; it reflects how work is described, not its quality or impact.
05the grantee network

8 grantees tracked through their own filings, 2017–2025.

Each grant beside the grantee’s revenue from every source, year by year.

How this is measured

Counted here: distinct organizations funded across 2017 to 2025, not grant rows in a single year, so this will not match the grant count on the cover. 8 of the 26 grantees resolved in that span have returns of their own we could reconcile.

Each grantee is resolved to its own IRS returns. Association, dated; never a causal claim.

0
Load-bearing (≥25% of a budget)
0
Early backer (in before they grew)
8/8
Grantees still filing
6/8
Grew since first funded

Where the money sits, by cause and then by grantee

THE OHIO STATE UNIVERSITY: $150,000 · OtherTHE OHIO STATE UNIVERSITYBAYLOR COLLEGE OF MEDICINE: $50,000 · OtherBAYLOR COLLEGE OF MEDICINEUNIVERSITY OF ARIZONA: $50,000 · OtherUNIVERSITY OF ARIZONAUniversity of Wisconsin Madison: $50,000 · OtherUniversity of Wisconsin MadisonUNIVERSITY OF CALIFORNIA SAN FRANCISCO: $50,000 · OtherUNIVERSITY OF CALIFORNIA SAN FRANCISCOREGENTS UNIV OF CALIFORNIA: $37,500 · OtherREGENTS UNIV OF CALIFORNIADYNOCARDIA: $30,000 · OtherIndividual grant recipient: $30,000 · OtherLUMIA HEALTH INC: $30,000 · OtherXimio Health Inc: $30,000 · Other+8 more: $100,000 · Other+8 moreTHE BOARD OF TRUSTEES OF THE LELAND STANFORD JUNIOR UNIVERSITY: $150,000 · EducationTHE BOARD OF TRUSTEES OF THE LELAND STANFORD…New York University: $150,000 · EducationNew York UniversityJOHNS HOPKINS UNIVERSITY: $150,000 · EducationJOHNS HOPKINS UNIVERSITYBaylor College of Medicine: $50,000 · EducationBaylor College of Medicine+1 more: $12,500 · EducationTHE UNIVERSITY OF VERMONT MEDICAL CENTER: $100,000 · HealthTHE UNIVERSITY OF…MAYO CLINIC: $50,000 · HealthMAYO CLINICVanderbilt University Medical Center: $50,000 · HealthVanderbilt Univer…
Other$607,500Education$512,500Health$200,000

Each grantee by its size and the funder’s share of it; top left is load-bearing

25%50%75%100%grantee revenue →↑ funder's share of their budgetTHE BOARD OF TRUSTEES OF THE LELAND STANFORD JUNIOR UNIVERSITY: $150,000 over 3y, 0.0% of budgetNew York University: $150,000 over 3y, 0.0% of budgetJOHNS HOPKINS UNIVERSITY: $150,000 over 3y, 0.0% of budgetTHE UNIVERSITY OF VERMONT MEDICAL CENTER: $100,000 over 2y, 0.0% of budgetMAYO CLINIC: $50,000 over 1y, 0.0% of budgetBaylor College of Medicine: $50,000 over 1y, 0.0% of budgetVanderbilt University Medical Center: $50,000 over 1y, 0.0% of budgetTHE UC DAVIS FOUNDATION: $12,500 over 1y, 0.0% of budget
Grantee by grantee: a decade per organization, before and after funding

A decade per grantee: revenue shaded, grants as bars, all rows on one timeline.

  • Who funds THE BOARD OF TRUSTEES OF THE LELAND STANFORD JUNIOR UNIVERSITY ↗
  • Who funds New York University ↗
  • Who funds JOHNS HOPKINS UNIVERSITY ↗
  • Who funds THE UNIVERSITY OF VERMONT MEDICAL CENTER ↗
  • Who funds MAYO CLINIC ↗
  • Who funds Baylor College of Medicine ↗
  • Who funds Vanderbilt University Medical Center ↗
  • Who funds THE UC DAVIS FOUNDATION ↗

How much its grantees rely on government

Each dot is one organization Heart Rhythm Society Inc funds: left to right is the share of its income from government, bottom to top the share from Heart Rhythm Society Inc. Bigger dots raise more.

2024
’20’21’22’23’24’25
no gov · 00%0%1%3%5%funder's share of their income ↑0%5%10%15%20%share of the org’s income from government →median 12%
  • Johns Hopkins University: 12% of income from government
  • The University of Vermont Medical Center: 1% of income from government
no gov moneyreceives it· size = income
0get no government money at all
0rely on government for over half their income
⤢ axis zoomed · 0–20%
typical government reliance, FY20–25
How this is measured
Government income is each org’s traced federal awards (USASpending grants and contracts) plus state payments (open checkbooks) as a share of its total revenue (IRS Form 990); the self-reported government-grant line (990 line 1e) is carried for cross-check: a grantee that reports government grants we could not trace to a source is left off the chart rather than shown as receiving none. An association, not a claim that a grant caused the public funding. Coverage is precision-first, a floor rather than a census; state records exist for 9 states, so a grantee outside them shows no state figure (dimmed) rather than a false zero. Federal award amounts are obligations, which can span years, so a single-year share is indicative. 990 filings lag 12 to 24 months.

On method. Every financial figure here is read from IRS e-file XML, the funder’s own 990/990-PF, and from the multi-year returns of the 26 grantees we resolved, each linked to its source. Grantee outcomes are each organization’s own program-service reporting (Form 990, Part III), read as association with funding, never as caused by it. Low-confidence name matches are suppressed rather than guessed. How we build these →

How this is measured
Each figure carries one of six labels. Filed is what the funder reported on its return. Official is another government record about an organization, such as a federal award or a charity register, joined by name where no shared identifier exists. Resolved is an identity we worked out where the filing named a recipient without an EIN, kept only above a measured confidence threshold. Computed is arithmetic over those, like themes, portfolio clusters and co-funder strength. Context is a statistic about a place rather than about an organization, which is what the need overlay is: it describes the area a grantee’s address sits in, not where its work lands. Inferred is drawn by a model from text, like the partnerships read out of public news and organization websites. Each is labeled where it appears.

Generated from the IRS Form 990 e-file return for fiscal year 2025, released 2025. Filings run roughly 12 to 24 months behind; figures are dated accordingly.

Source object · view filing

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More from the funding graph

The unnamed billions
grants reported with no recipient in the public record
The regranting layer
51% of grant dollars land in the regranting layer
The DAF merry-go-round
$9.7B circulates between donor-advised funds
The endowment market
who holds foundation money, and what just moved
The camps
funders cluster by geography, not ideology
By state
where grant money is based, and what stays home