Dilution profile // every instrument, one screen, from SEC filings

Heartflow, Inc. (HTFL)

CIK 1464521 · all EDGAR filings →

Overall dilution risk
HIGHworst of 4 computed signals (offering ability)
= the worst band among the computed sub-ratings, no hidden weighting
Offering ability
HIGHS-1/A on file 2025-08-06
= is there a registration (S-1/S-3 family) on file without a later withdrawal
no structured fee data on the live registrations, so this is a yes/no, not a size
Overhead supply
LOWwarrants = 0% of O/S
= warrant shares outstanding divided by current shares outstanding (bands: 20% / 50%)
warrants only; converts, ATMs and equity lines are not in free structured data, so the true overhead is AT LEAST this
Historical dilution
LOW+3% O/S in 3y
= share count now vs 3 years ago (bands: 30% / 100%); a reverse split pushes this negative
Cash need
LOW~35.2 months of runway
= cash vs trailing operating burn (bands: 6mo / 24mo; positive operating CF = low)

Same rating bands the category standard uses, but free, with the formula on the chip and the gaps in the data said out loud.

Shares outstanding over time

2025-08-312026-04-30

Latest: 86.2M shares as of Apr 30, 2026 (10-Q).

Cash runway

Self-funding

generates cash

Full breakdown: cash runway tool · source filing →

Warrants

TrancheWarrantsExercise priceTermNotes
Common Stock Warrant Credit Agreement1.5M$0.03
Common Stock Warrant Initial Term Loan108,154$0.03FV $4.3M
Common Stock Warrant New Money Term Loan77,253$0.03FV $3.5M

Tranches exactly as the company dimensioned them in its 10-K filed Mar 18, 2026. Groupings can overlap (a “Series E and F” row is not additive with a “Series E” row), so do not sum this column. A tranche the filer did not tag is absent here, not absent from the cap table. DOWN-ROUND = the filer tagged price-protection accounting scoped to that tranche.

Warrants outstanding: 0 underlying shares, as reported Mar 31, 2026 (10-Q).

Balance-sheet fair value of warrants: $0 as of Dec 31, 2025.

Rough fully diluted estimate: 86.2M = 86.2M O/S + 0 warrant shares. An estimate, not a filing figure: it ignores converts, options and RSUs, and the two inputs carry different as-of dates.

Convertible notes

NotePrincipalCarryingConv. priceRateIf converted
2025 Convertible Promissory Notes$98.3Mnot tagged
2025 Convertible Promissory Notes Settled In Cash$74.0Mnot tagged

Notes exactly as the company dimensioned them in its 10-Q filed May 14, 2026. Principal is face amount as tagged, not what remains after repurchases unless the filer updated the tag. A note the filer did not dimension is absent here, not absent from the balance sheet; the exhibits stay the ground truth.

Fully diluted build-up

Shares outstanding plus every potential-share instrument the filer tagged in XBRL, each at its own as-of date. An estimate assembled from filed figures, not a filing figure itself.

Shares outstanding86.2MApr 30, 2026
+ Common Stock Warrant Credit Agreement (if exercised)1.5MJan 19, 2021
+ Common Stock Warrant Initial Term Loan (if exercised)108,154Jan 19, 2021
+ Common Stock Warrant New Money Term Loan (if exercised)77,253Jan 19, 2021
Fully diluted estimate87.9M+1.9% vs O/S

Still excluded, because the filer does not tag them in countable form: employee options and RSUs, any instrument living only in exhibit prose, and instruments above missing a share count. Inputs carry different as-of dates, shown per row. Each figure traces to the tranche and note tables above and their cited filings.

Registrations and offerings

S-1Jul 17, 2025no structured fee exhibit in this filing (predates fee-data XBRL or fee deferred)filing →

Last 12 months: 0 executed · 0 registered.

EXECUTEDAug 8, 2025Final prospectus — offering priced (typical for IPOs and marketed share deals)424B4
EFFECTIVEAug 7, 2025SEC declared a registration effective — selling can beginEFFECT
REGISTEREDAug 6, 2025S-1/A registration — capacity to sell shares, not a sale yetS-1/A
REGISTEREDAug 1, 2025S-1/A registration — capacity to sell shares, not a sale yetS-1/A
REGISTEREDJul 17, 2025S-1 registration — capacity to sell shares, not a sale yetS-1

Full history and shelf status: offering checker · S-3 shelf checker

Source: SEC EDGAR XBRL company facts and filing metadata, fetched live and cached briefly. Share counts are cover-page figures with their form named. Warrant tranches and convertible notes come from the dimensioned facts in the latest 10-Q/10-K instance document, exactly as the company tagged them; untagged tranches and notes are absent, not disproven. Nothing on this page is manually verified and nothing is behind a login: what free data supports is shown, what it cannot support is stated. Not investment advice.

Keep going: float checker · offering calendar · short-squeeze screener · full HTFL workspace