Stock Trading Canary

United States · SEC Form 4 · Snapshot date: 2026-10-19 · Built: 2026-10-19 · 中文

← United States · Coverage record

US · SEC FORM 4

Pulmonx Corp

LUNG · Nasdaq · CIK 0001127537 · Healthcare · Medical Devices

INSIDER SIGNAL

No active buy signal

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

35 Form 4 transaction lines observed in the same window
29 sales · 6 option, withholding, award, gift or other lines

Last qualifying purchase2025-06-05 · Florin Daniel P · $71.4K

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.

Purchase breadth, concentration & cluster buying

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

Insider activity timeline

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

AprMayJunJulAugSepOct
French Glendon E. IIIPresident and CEO
▼▼▼
Radhakrishnan SrikanthChief Science &Techn. Officer
▼▼
Lehman David AaronGENERAL COUNSEL
▼▼
Rose Geoffrey BeranCHIEF COMMERCIAL OFFICER
▼▼
Burns Thomas WilliamDirector
○
Ferrari RichardDirector
○
● Purchase▼ Sale○ Other

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

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: 2025-06-05 · Florin Daniel P.

Recent Form 4 activity

0Purchases
55Sales
11Other Form 4 lines
23SEC filings · 365 days
BUYING0 qualifying P line(s) · 180 days
SELLING29 sale line(s) · context only
OTHER6 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
802,733
Previous report
847,842
Avg daily volume
251,008
Days to cover
3.2

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
2025-06-05Florin Daniel PPurchase (P)Common Stock23,321USD 3.06USD 71,362SEC filing ↗
2024-08-20Williamson Steven S.Purchase (P)Common Stock14,245USD 6.84USD 97,436SEC filing ↗
2022-11-29Lynch Alissa HsuPurchase (P)Common Stock1,700USD 5.51USD 9,367SEC filing ↗
2022-11-08Ferrari RichardPurchase (P)Common Stock5,438USD 5.31USD 28,874SEC filing ↗
2021-07-12Florin Daniel PPurchase (P)Common Stock2,500USD 40.00USD 100,000SEC filing ↗
2021-06-25Florin Daniel PPurchase (P)Common Stock2,222USD 44.12USD 98,035SEC filing ↗
2020-10-05Melenikiotou GeorgiaPurchase (P)Common Stock26,315USD 19.00USD 499,985SEC filing ↗
2020-10-05Mead Dana G Jr.Purchase (P)Common Stock26,315USD 19.00USD 499,985SEC filing ↗
2020-10-05Florin Daniel PPurchase (P)Common Stock15,789USD 19.00USD 299,991SEC filing ↗
2020-10-05FERRARI RICHARD MPurchase (P)Common Stock13,157USD 19.00USD 249,983SEC filing ↗

Form 4 evidence

66 transaction lines in the latest 365-day window; 424 in local history.

DateOwnerTypeSecuritySharesAvg. priceApprox. valueSource
2026-09-01Rose Geoffrey BeranSale (S)Common Stock7,879USD 2.26USD 17,807SEC filing ↗
2026-09-01Radhakrishnan SrikanthSale (S)Common Stock14,245USD 2.26USD 32,194SEC filing ↗
2026-09-01Lehman David AaronSale (S)Common Stock14,334USD 2.26USD 32,395SEC filing ↗
Show recent Form 4 evidence (28 grouped rows)
DateOwnerTypeSecuritySharesAvg. priceApprox. valueSource
2026-09-01Rose Geoffrey BeranSale (S)Common Stock7,879USD 2.26USD 17,807SEC filing ↗
2026-09-01Radhakrishnan SrikanthSale (S)Common Stock14,245USD 2.26USD 32,194SEC filing ↗
2026-09-01Lehman David AaronSale (S)Common Stock14,334USD 2.26USD 32,395SEC filing ↗
2026-09-01French Glendon E. IIISale (S)Common Stock41,882USD 2.26USD 94,653SEC filing ↗
2026-06-05Sullivan TiffanyAward / grant (A)Common Stock40,000USD 0.00USD 0SEC filing ↗
2026-06-05Melenikiotou GeorgiaAward / grant (A)Common Stock40,000USD 0.00USD 0SEC filing ↗
2026-06-05Mead Dana G Jr.Award / grant (A)Common Stock40,000USD 0.00USD 0SEC filing ↗
2026-06-05Florin Daniel PAward / grant (A)Common Stock40,000USD 0.00USD 0SEC filing ↗
2026-06-05Ferrari RichardAward / grant (A)Common Stock40,000USD 0.00USD 0SEC filing ↗
2026-06-05Burns Thomas WilliamAward / grant (A)Common Stock40,000USD 0.00USD 0SEC filing ↗
2026-06-02French Glendon E. IIISale (S)Common Stock13,511USD 1.57USD 21,212SEC filing ↗
2026-06-01Rose Geoffrey BeranSale (S)Common Stock8,023USD 1.54USD 12,355SEC filing ↗
2026-06-01Radhakrishnan SrikanthSale (S)Common Stock14,497USD 1.54USD 22,325SEC filing ↗
2026-06-01Lehman David AaronSale (S)Common Stock14,594USD 1.54USD 22,475SEC filing ↗
2026-06-01French Glendon E. IIISale (S)Common Stock42,638USD 1.54USD 65,663SEC filing ↗
2026-03-02Rose Geoffrey BeranSale (S)Common Stock7,732USD 1.43USD 11,057SEC filing ↗
2026-03-02Rose Geoffrey BeranAward / grant (A)Common Stock100,000USD 0.00USD 0SEC filing ↗
2026-03-02Radhakrishnan SrikanthSale (S)Common Stock10,483USD 1.43USD 14,991SEC filing ↗
2026-03-02Radhakrishnan SrikanthAward / grant (A)Common Stock175,000USD 0.00USD 0SEC filing ↗
2026-03-02Lehman David AaronSale (S)Common Stock12,237USD 1.43USD 17,499SEC filing ↗
2026-03-02Lehman David AaronAward / grant (A)Common Stock150,000USD 0.00USD 0SEC filing ↗
2026-03-02French Glendon E. IIISale (S)Common Stock67,813USD 1.43USD 96,973SEC filing ↗
2025-12-08Florin Daniel PSale (S)Common Stock23,321USD 1.99USD 46,409SEC filing ↗
2025-12-01Sung DerrickAward / grant (A)Common Stock1,200,000USD 0.00USD 0SEC filing ↗
2025-12-01Rose Geoffrey BeranSale (S)Common Stock6,322USD 1.57USD 9,926SEC filing ↗
2025-12-01Lehman David AaronSale (S)Common Stock10,278USD 1.57USD 16,136SEC filing ↗
2025-12-01French Glendon E. IIISale (S)Common Stock8,805USD 1.57USD 13,824SEC filing ↗
2025-12-01French Glendon E. IIIAward / grant (A)Common Stock1,200,000USD 0.00USD 0SEC 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 date2026-10-19
Ranking versionUS-v1.2
Data qualityPASS ELIGIBLE · —
TickerLUNG
CIK0001127537
SectorHealthcare
IndustryMedical Devices Yahoo Finance
SEC SIC3841 Surgical & Medical Instruments & Apparatus
ExchangeNasdaq

Data coverage

Local Form 4 history424 transaction lines from 2020-10-05 to 2026-09-01
11 P purchase lines · 310 S sale lines · 103 other lines
SEC company submissionsOpen SEC filings ↗

Local ledger as of 2026-10-19. Mapping status is an audit field and does not erase SEC filing evidence.