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

Krystal Biotech, Inc.

KRYS · Nasdaq · CIK 0001711279 · Healthcare · Biotechnology

INSIDER SIGNAL

No active buy signal

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

60 Form 4 transaction lines observed in the same window
58 sales · 2 option, withholding, award, gift or other lines

Last qualifying purchaseNo qualifying purchase is present in the local Form 4 history.

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
Thomas John CharlesEVP, General Counsel
▼○▼
Krishnan SumaPresident, R&D
▼▼
Krishnan Krish SPresident and CEO
▼▼
ROSSI DINO ADirector
○▼
● Purchase▼ Sale○ Other

—

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.—

Recent Form 4 activity

0Purchases
142Sales
32Other Form 4 lines
18SEC filings · 365 days
BUYING0 qualifying P line(s) · 180 days
SELLING58 sale line(s) · context only
OTHER2 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
3,475,527
Previous report
3,163,642
Avg daily volume
310,502
Days to cover
11.2

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

No qualifying code P equity purchase is present in the local Form 4 history.

Form 4 evidence

174 transaction lines in the latest 365-day window; 629 in local history.

DateOwnerTypeSecuritySharesAvg. priceApprox. valueSource
2026-09-04Krishnan SumaSale (S)Common Stock25,000USD 359.32USD 8,982,990SEC filing ↗
2026-09-04Krishnan Krish SSale (S)Common Stock25,000USD 359.32USD 8,983,085SEC filing ↗
2026-08-14ROSSI DINO ASale (S)Common Stock25,000USD 329.12USD 8,227,934SEC filing ↗
Show recent Form 4 evidence (30 grouped rows)
DateOwnerTypeSecuritySharesAvg. priceApprox. valueSource
2026-09-04Krishnan SumaSale (S)Common Stock25,000USD 359.32USD 8,982,990SEC filing ↗
2026-09-04Krishnan Krish SSale (S)Common Stock25,000USD 359.32USD 8,983,085SEC filing ↗
2026-08-14ROSSI DINO ASale (S)Common Stock25,000USD 329.12USD 8,227,934SEC filing ↗
2026-08-14ROSSI DINO AGift (G)Common Stock3,691USD 0.00USD 0SEC filing ↗
2026-06-25Thomas John CharlesSale (S)Common Stock1,000USD 347.27USD 347,270SEC filing ↗
2026-06-25Thomas John CharlesOption exercise / conversion (M)Common Stock1,000USD 179.25USD 179,250SEC filing ↗
2026-06-04Krishnan SumaSale (S)Common Stock25,000USD 308.12USD 7,702,883SEC filing ↗
2026-06-04Krishnan Krish SSale (S)Common Stock25,000USD 308.12USD 7,703,028SEC filing ↗
2026-05-26Thomas John CharlesSale (S)Common Stock642USD 302.03USD 193,903SEC filing ↗
2026-03-04Krishnan SumaSale (S)Common Stock25,000USD 263.21USD 6,580,268SEC filing ↗
2026-03-04Krishnan Krish SSale (S)Common Stock25,000USD 263.17USD 6,579,175SEC filing ↗
2026-03-02ROMANO KATHRYNSale (S)Common Stock750USD 267.60USD 200,700SEC filing ↗
2026-02-27ROMANO KATHRYNOption exercise / conversion (M)Common Stock8,050USD 0.00USD 0SEC filing ↗
2026-02-27ROMANO KATHRYNTax withholding (F)Common Stock3,502USD 275.64USD 965,291SEC filing ↗
2026-02-27Krishnan SumaOption exercise / conversion (M)Common Stock67,225USD 0.00USD 0SEC filing ↗
2026-02-27Krishnan SumaTax withholding (F)Common Stock30,584USD 275.64USD 8,430,174SEC filing ↗
2026-02-27Krishnan Krish SOption exercise / conversion (M)Common Stock67,225USD 0.00USD 0SEC filing ↗
2026-02-27Krishnan Krish STax withholding (F)Common Stock30,584USD 275.64USD 8,430,174SEC filing ↗
2026-02-27JANNEY DANIELSale (S)Common Stock11,803USD 275.59USD 3,252,845SEC filing ↗
2026-02-26JANNEY DANIELSale (S)Common Stock7,741USD 275.63USD 2,133,686SEC filing ↗
2026-02-25JANNEY DANIELSale (S)Common Stock700USD 275.00USD 192,500SEC filing ↗
2026-02-24JANNEY DANIELSale (S)Common Stock51,720USD 267.27USD 13,823,273SEC filing ↗
2026-02-24JANNEY DANIELOption exercise / conversion (M)Common Stock37,895USD 2.46USD 93,222SEC filing ↗
2026-02-19ROSSI DINO ASale (S)Common Stock18,950USD 261.41USD 4,953,728SEC filing ↗
2026-02-19ROSSI DINO AOption exercise / conversion (M)Common Stock18,950USD 8.79USD 166,570SEC filing ↗
2026-02-09ROMANO KATHRYNSale (S)Common Stock12,500USD 272.14USD 3,401,703SEC filing ↗
2026-02-09ROMANO KATHRYNOption exercise / conversion (M)Common Stock12,500USD 63.55USD 794,375SEC filing ↗
2026-02-09ROMANO KATHRYNGift (G)Common Stock750USD 0.00USD 0SEC filing ↗
2025-12-05Krishnan SumaGift (G)Common Stock5,000USD 0.00USD 0SEC filing ↗
2025-12-05Krishnan Krish SGift (G)Common Stock5,000USD 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 date2026-10-18
Ranking versionUS-v1.2
Data qualityPASS ELIGIBLE · —
TickerKRYS
CIK0001711279
SectorHealthcare
IndustryBiotechnology Yahoo Finance
SEC SIC2836 Biological Products, (No Diagnostic Substances)
ExchangeNasdaq

Data coverage

Local Form 4 history629 transaction lines from 2020-02-18 to 2026-09-04
0 P purchase lines · 510 S sale lines · 119 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.