Stock Trading Canary

United States · SEC Form 4 · Snapshot date: 2026-10-18 · Built: 2026-10-18 · 中文

← United States · Coverage record

US · SEC FORM 4

Heartflow, Inc.

HTFL · Nasdaq · CIK 0001464521 · Healthcare · Health Information Services

INSIDER SIGNAL

No active buy signal

0 qualifying P purchase groups
in the current 180-day scoring window

58 Form 4 transaction lines observed in the same window
27 sales · 31 option, withholding, award, gift or other lines

Last qualifying purchase2025-12-16 · Lightcap Jeffrey C · $1.1M

WHY NO ACTIVE SIGNAL?

Purchase activityNone
Recent buyingNone
Recent salesHigh
Buy signal statusInactive
Score anatomy

No score is calculated because there is no qualifying purchase in the active window. Unavailable inputs are not treated as zero or as a bearish signal.

ClusterNot calculated
Purchase sizeNot calculated
RoleNot calculated
RecencyNot calculated
ConvictionNot calculated

Why is there no score?

  • No qualifying open-market purchase supplies cluster, size, role, recency or conviction inputs.
  • Sales and other Form 4 activity remain visible as context and do not create a negative score.

Sales and other Form 4 activity are shown separately and do not create a negative buy signal. Absence of buying is not scored as bearish.

Insider activity timeline

Owner lanes show the latest 180 days. Symbol shape identifies the transaction type; sales remain context only.

AprMayJunJulAugSepOct
Verghese VikramChief Financial Officer
○○○▼▼▼▼▼▼▼▼
Farquhar John C.M.Chief Executive Officer
▼○○○▼▼▼▼▼▼▼
Rogers CampbellChief Medical Officer
○▼○○○▼○▼
Jones Marie L.Chief Accounting Officer
○○
Lightcap Jeffrey CDirector
○
BARABE TIMOTHY CDirector
○
● Purchase▼ Sale○ Other

Showing the six most active owners; 1 additional owner(s) remain in Form 4 evidence.

Purchase breadth, concentration & cluster buying

These modules activate when qualifying purchases enter the 180-day research window.

SIGNAL HISTORY

No recorded active-signal snapshot

Scores are archived only when the company qualifies for a published US buy-signal snapshot. Last qualifying purchase: 2025-12-16 · Lightcap Jeffrey C.

Recent Form 4 activity

1Purchases
37Sales
59Other Form 4 lines
57SEC filings · 365 days
BUYING0 qualifying P line(s) · 180 days
SELLING27 sale line(s) · context only
OTHER31 exercise / withholding / award / gift / other lines
10b5-1 / PLANNEDNot assessed

P is an open-market or private purchase. S is a sale. M, F, A and G usually describe exercises, tax withholding, awards and gifts. These categories remain visually separate.

Market context

Market context has not been captured for this ticker yet. The daily market-context job processes the US universe in rotating batches.

Short interest

Short interest is external context reported to FINRA by broker-dealers. It does not affect the Insider Signal.

Shares short
6,813,775
Previous report
5,627,391
Avg daily volume
2,039,619
Days to cover
3.3

FINRA settlement date: 2026-09-30 · Captured 2026-10-12 · FINRA equity short interest ↗. A share count, published about a week after each of two settlement dates a month; not a percentage of shares outstanding.

Historical equity purchases

Qualifying code P transactions in the local Form 4 history, including purchases outside the current signal window.

Transaction dateReporting ownerTypeSecuritySharesAvg. priceApprox. valueSource
2025-12-16Lightcap Jeffrey CPurchase (P)Common Stock40,000USD 26.34USD 1,053,600SEC filing ↗

Form 4 evidence

97 transaction lines in the latest 365-day window; 116 in local history.

DateOwnerTypeSecuritySharesAvg. priceApprox. valueSource
2026-10-12Farquhar John C.M.Sale (S)Common Stock38,900USD 49.57USD 1,928,195SEC filing ↗
2026-09-18Rogers CampbellSale (S)Common Stock19,682USD 50.15USD 987,052SEC filing ↗
2026-09-18Rogers CampbellOption exercise / conversion (M)Common Stock13,179USD 7.94USD 104,588SEC filing ↗
Show recent Form 4 evidence (30 grouped rows)
DateOwnerTypeSecuritySharesAvg. priceApprox. valueSource
2026-10-12Farquhar John C.M.Sale (S)Common Stock38,900USD 49.57USD 1,928,195SEC filing ↗
2026-09-18Rogers CampbellSale (S)Common Stock19,682USD 50.15USD 987,052SEC filing ↗
2026-09-18Rogers CampbellOption exercise / conversion (M)Common Stock13,179USD 7.94USD 104,588SEC filing ↗
2026-09-18Verghese VikramSale (S)Common Stock.16,766USD 50.75USD 850,874SEC filing ↗
2026-09-17Verghese VikramSale (S)Common Stock.7,579USD 50.11USD 379,784SEC filing ↗
2026-09-15Verghese VikramSale (S)Common Stock.668USD 50.01USD 33,407SEC filing ↗
2026-09-14Verghese VikramSale (S)Common Stock.4,593USD 50.24USD 230,752SEC filing ↗
2026-09-11Verghese VikramSale (S)Common Stock.29,714USD 50.06USD 1,487,483SEC filing ↗
2026-09-11Farquhar John C.M.Sale (S)Common Stock3,890USD 50.00USD 194,500SEC filing ↗
2026-09-10Farquhar John C.M.Sale (S)Common Stock35,010USD 46.42USD 1,625,164SEC filing ↗
2026-09-08Verghese VikramSale (S)Common Stock.6,640USD 50.03USD 332,199SEC filing ↗
2026-09-03Verghese VikramSale (S)Common Stock.27,540USD 49.69USD 1,368,463SEC filing ↗
2026-09-02Verghese VikramSale (S)Common Stock.5,876USD 50.60USD 297,326SEC filing ↗
2026-08-21Farquhar John C.M.Sale (S)Common Stock27,230USD 50.00USD 1,361,500SEC filing ↗
2026-08-18Farquhar John C.M.Sale (S)Common Stock32,676USD 45.00USD 1,470,420SEC filing ↗
2026-08-17Rogers CampbellSale (S)Common Stock9,219USD 41.23USD 380,099SEC filing ↗
2026-08-17Rogers CampbellOption exercise / conversion (M)Common Stock9,219USD 19.00USD 175,161SEC filing ↗
2026-08-14Farquhar John C.M.Sale (S)Common Stock15,560USD 39.06USD 607,774SEC filing ↗
2026-08-10Farquhar John C.M.Sale (S)Common Stock22,562USD 28.31USD 638,730SEC filing ↗
2026-08-07Verghese VikramTax withholding (F)Common Stock.473USD 28.82USD 13,632SEC filing ↗
2026-08-07Rogers CampbellTax withholding (F)Common Stock637USD 28.82USD 18,358SEC filing ↗
2026-08-07Jones Marie L.Tax withholding (F)Common Stock.82USD 28.82USD 2,363SEC filing ↗
2026-08-07Farquhar John C.M.Tax withholding (F)Common Stock1,904USD 28.82USD 54,873SEC filing ↗
2026-08-06Verghese VikramTax withholding (F)Common Stock.1,537USD 27.19USD 41,791SEC filing ↗
2026-08-06Rogers CampbellTax withholding (F)Common Stock1,635USD 27.19USD 44,456SEC filing ↗
2026-08-06Jones Marie L.Tax withholding (F)Common Stock.486USD 27.19USD 13,214SEC filing ↗
2026-08-06Farquhar John C.M.Tax withholding (F)Common Stock5,847USD 27.19USD 158,980SEC filing ↗
2026-07-30Farquhar John C.M.Option exercise / conversion (M)Common Stock31,220USD 5.06USD 158,014SEC filing ↗
2026-07-27Verghese VikramOption exercise / conversion (M)Common Stock.22,522USD 2.22USD 49,999SEC filing ↗
2026-07-24Lightcap Jeffrey COption exercise / conversion (M)Common Stock47,420USD 19.00USD 900,980SEC filing ↗

Multiple price lines in one filing are grouped and share-weighted. Price and value are blank when a grouped filing line lacks price evidence.

Snapshot & identity

Snapshot date2026-10-18
Ranking versionUS-v1.2
Data qualityPASS ELIGIBLE · —
TickerHTFL
CIK0001464521
SectorHealthcare
IndustryHealth Information Services Yahoo Finance
SEC SIC3841 Surgical & Medical Instruments & Apparatus
ExchangeNasdaq

Data coverage

Local Form 4 history116 transaction lines from 2025-08-07 to 2026-10-12
1 P purchase lines · 37 S sale lines · 78 other lines
SEC company submissionsOpen SEC filings ↗

Local ledger as of 2026-10-18. Mapping status is an audit field and does not erase SEC filing evidence.