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

INSMED Inc

INSM · Nasdaq · CIK 0001104506 · Healthcare · Biotechnology

INSIDER SIGNAL

No active buy signal

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

69 Form 4 transaction lines observed in the same window
44 sales · 25 option, withholding, award, gift or other lines

Last qualifying purchase2025-05-21 · Desjardins Clarissa · $75.0K

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
Lewis WilliamChair and CEO
○▼▼○▼▼▼○▼○▼○▼
Flammer Martina M.D.Chief Medical Officer
○▼▼▼▼▼○▼○▼
Smith Michael AlexanderChief Legal Officer
▼▼▼▼
Adsett RogerChief Operating Officer
▼▼○▼
Bonstein SaraChief Financial Officer
▼▼
SHAROKY MELVIN MDDirector
○▼
● Purchase▼ Sale○ Other

Showing the six most active owners; 6 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: 2025-05-21 · Desjardins Clarissa.

Recent Form 4 activity

0Purchases
169Sales
73Other Form 4 lines
75SEC filings · 365 days
BUYING0 qualifying P line(s) · 180 days
SELLING44 sale line(s) · context only
OTHER25 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
13,800,693
Previous report
10,802,070
Avg daily volume
2,123,248
Days to cover
6.5

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
2025-05-21Desjardins ClarissaPurchase (P)Common Stock1,130USD 66.35USD 74,976SEC filing ↗
2025-05-20Desjardins ClarissaPurchase (P)Common Stock1,895USD 66.87USD 126,719SEC filing ↗
2023-05-15SHAROKY MELVIN MDPurchase (P)Common Stock10,000USD 19.29USD 192,900SEC filing ↗
2022-11-01SHAROKY MELVIN MDPurchase (P)Common Stock10,000USD 17.70USD 177,000SEC filing ↗
2022-10-31SHAROKY MELVIN MDPurchase (P)Common Stock20,000USD 17.53USD 350,600SEC filing ↗
2022-10-31LEE LEOPurchase (P)Common Stock45,000USD 17.69USD 796,050SEC filing ↗
2022-05-11SHAROKY MELVIN MDPurchase (P)Common Stock20,000USD 17.20USD 344,000SEC filing ↗
2021-11-01ENGELSEN STEINAR JPurchase (P)Common Stock14,235USD 30.14USD 429,043SEC filing ↗
2021-11-01Brennan David RPurchase (P)Common Stock10,000USD 30.15USD 301,500SEC filing ↗
2021-03-04ENGELSEN STEINAR JPurchase (P)Common Stock2,710USD 36.90USD 99,999SEC filing ↗

Form 4 evidence

242 transaction lines in the latest 365-day window; 1,012 in local history.

DateOwnerTypeSecuritySharesAvg. priceApprox. valueSource
2026-09-09Brennan David RSale (S)Common Stock25,000USD 124.00USD 3,100,000SEC filing ↗
2026-08-17SHAROKY MELVIN MDSale (S)Common Stock5,000USD 127.53USD 637,650SEC filing ↗
2026-08-10Adsett RogerSale (S)Common Stock239,850USD 133.27USD 31,964,810SEC filing ↗
Show recent Form 4 evidence (30 grouped rows)
DateOwnerTypeSecuritySharesAvg. priceApprox. valueSource
2026-09-09Brennan David RSale (S)Common Stock25,000USD 124.00USD 3,100,000SEC filing ↗
2026-08-17SHAROKY MELVIN MDSale (S)Common Stock5,000USD 127.53USD 637,650SEC filing ↗
2026-08-10Adsett RogerSale (S)Common Stock239,850USD 133.27USD 31,964,810SEC filing ↗
2026-08-10Adsett RogerOption exercise / conversion (M)Common Stock239,850USD 20.45USD 4,905,570SEC filing ↗
2026-08-06Flammer Martina M.D.Sale (S)Common Stock27,173USD 128.61USD 3,494,838SEC filing ↗
2026-08-06Flammer Martina M.D.Option exercise / conversion (M)Common Stock27,173USD 21.20USD 576,126SEC filing ↗
2026-07-23Lewis WilliamSale (S)Common Stock10,700USD 106.06USD 1,134,890SEC filing ↗
2026-07-23Lewis WilliamOption exercise / conversion (M)Common Stock10,700USD 24.94USD 266,870SEC filing ↗
2026-07-09Lewis WilliamSale (S)Common Stock10,699USD 117.40USD 1,256,084SEC filing ↗
2026-07-09Lewis WilliamOption exercise / conversion (M)Common Stock10,699USD 24.94USD 266,840SEC filing ↗
2026-07-06Flammer Martina M.D.Sale (S)Common Stock12,302USD 109.98USD 1,352,932SEC filing ↗
2026-07-06Flammer Martina M.D.Option exercise / conversion (M)Common Stock12,302USD 25.80USD 317,445SEC filing ↗
2026-06-25Lewis WilliamSale (S)Common Stock21,398USD 103.32USD 2,210,763SEC filing ↗
2026-06-25Lewis WilliamOption exercise / conversion (M)Common Stock21,398USD 24.94USD 533,679SEC filing ↗
2026-06-23Butera SamueleAward / grant (A)Common Stock7,342USD —USD —SEC filing ↗
2026-06-22Smith Michael AlexanderSale (S)Common Stock1,806USD 95.82USD 173,051SEC filing ↗
2026-06-08Lewis WilliamSale (S)Common Stock6,515USD 94.03USD 612,605SEC filing ↗
2026-06-05Flammer Martina M.D.Sale (S)Common Stock1,858USD 103.78USD 192,823SEC filing ↗
2026-06-03Smith Michael AlexanderSale (S)Common Stock2,159USD 102.27USD 220,801SEC filing ↗
2026-06-03Lewis WilliamSale (S)Common Stock7,605USD 102.27USD 777,763SEC filing ↗
2026-06-03Flammer Martina M.D.Sale (S)Common Stock2,566USD 102.27USD 262,425SEC filing ↗
2026-06-03Bonstein SaraSale (S)Common Stock2,404USD 102.27USD 245,857SEC filing ↗
2026-06-03Adsett RogerSale (S)Common Stock2,370USD 102.27USD 242,380SEC filing ↗
2026-05-22Smith Michael AlexanderSale (S)Common Stock6,149USD 108.47USD 666,982SEC filing ↗
2026-05-18Lewis WilliamSale (S)Common Stock25,564USD 106.33USD 2,718,224SEC filing ↗
2026-05-18Lewis WilliamOption exercise / conversion (M)Common Stock10,699USD 24.94USD 266,840SEC filing ↗
2026-05-14Flammer Martina M.D.Sale (S)Common Stock10,479USD 117.54USD 1,231,702SEC filing ↗
2026-05-13Smith Michael AlexanderSale (S)Common Stock4,109USD 116.18USD 477,384SEC filing ↗
2026-05-13SHAROKY MELVIN MDAward / grant (A)Common Stock3,305USD —USD —SEC filing ↗
2026-05-13SCHAFER CAROLAward / grant (A)Common Stock3,305USD —USD —SEC 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 · —
TickerINSM
CIK0001104506
SectorHealthcare
IndustryBiotechnology Yahoo Finance
SEC SIC2834 Pharmaceutical Preparations
ExchangeNasdaq

Data coverage

Local Form 4 history1,012 transaction lines from 2020-01-03 to 2026-09-09
10 P purchase lines · 572 S sale lines · 430 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.