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

Verastem, Inc.

VSTM · Nasdaq · CIK 0001526119 · Healthcare · Biotechnology

INSIDER SIGNAL

No active buy signal

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

18 Form 4 transaction lines observed in the same window
8 sales · 10 option, withholding, award, gift or other lines

Last qualifying purchase2020-12-04 · BARBERICH TIMOTHY J · $108.5K

WHY NO ACTIVE SIGNAL?

Purchase activityNone
Recent buyingNone
Recent salesModerate
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
Paterson DanPresident and CEO
▼▼▼○▼
Calkins DanielChief Financial Officer
▼▼○▼
BAILEY MICHAEL PDirector
○
Tollefson Karin AnnaDirector
○
Stuglik Brian MDirector
○
Rowinsky Eric KDirector
○
● Purchase▼ Sale○ Other

Showing the six most active owners; 4 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: 2020-12-04 · BARBERICH TIMOTHY J.

Recent Form 4 activity

0Purchases
33Sales
14Other Form 4 lines
33SEC filings · 365 days
BUYING0 qualifying P line(s) · 180 days
SELLING8 sale line(s) · context only
OTHER10 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
14,964,825
Previous report
18,028,616
Avg daily volume
2,145,520
Days to cover
7.0

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
2020-12-04BARBERICH TIMOTHY JPurchase (P)Common Stock50,000USD 2.17USD 108,500SEC filing ↗

Form 4 evidence

47 transaction lines in the latest 365-day window; 225 in local history.

DateOwnerTypeSecuritySharesAvg. priceApprox. valueSource
2026-10-01Paterson DanSale (S)Common Stock44,121USD 8.00USD 352,968SEC filing ↗
2026-10-01Calkins DanielSale (S)Common Stock2,566USD 8.00USD 20,528SEC filing ↗
2026-09-30Paterson DanAward / grant (A)Common Stock106,893USD 0.00USD 0SEC filing ↗
Show recent Form 4 evidence (30 grouped rows)
DateOwnerTypeSecuritySharesAvg. priceApprox. valueSource
2026-10-01Paterson DanSale (S)Common Stock44,121USD 8.00USD 352,968SEC filing ↗
2026-10-01Calkins DanielSale (S)Common Stock2,566USD 8.00USD 20,528SEC filing ↗
2026-09-30Paterson DanAward / grant (A)Common Stock106,893USD 0.00USD 0SEC filing ↗
2026-09-30Calkins DanielAward / grant (A)Common Stock8,333USD 0.00USD 0SEC filing ↗
2026-09-21Calkins DanielSale (S)Common Stock55USD 7.70USD 424SEC filing ↗
2026-08-03Paterson DanSale (S)Common Stock1,302USD 5.81USD 7,565SEC filing ↗
2026-06-22Paterson DanSale (S)Common Stock20,871USD 4.18USD 87,241SEC filing ↗
2026-06-22Calkins DanielSale (S)Common Stock4,089USD 4.18USD 17,089SEC filing ↗
2026-05-21BAILEY MICHAEL PAward / grant (A)Common Stock108,000USD 0.00USD 0SEC filing ↗
2026-05-21Tollefson Karin AnnaAward / grant (A)Common Stock36,000USD 0.00USD 0SEC filing ↗
2026-05-21Stuglik Brian MAward / grant (A)Common Stock36,000USD 0.00USD 0SEC filing ↗
2026-05-21Rowinsky Eric KAward / grant (A)Common Stock36,000USD 0.00USD 0SEC filing ↗
2026-05-21ROBERTSON MICHELLEAward / grant (A)Common Stock36,000USD 0.00USD 0SEC filing ↗
2026-05-21Kapur AnilAward / grant (A)Common Stock36,000USD 0.00USD 0SEC filing ↗
2026-05-21JOHNSON JOHNAward / grant (A)Common Stock36,000USD 0.00USD 0SEC filing ↗
2026-05-21Bunn Paul A.Award / grant (A)Common Stock36,000USD 0.00USD 0SEC filing ↗
2026-05-04Paterson DanSale (S)Common Stock806USD 5.82USD 4,691SEC filing ↗
2026-03-20Calkins DanielAward / grant (A)Common Stock57USD 5.74USD 327SEC filing ↗
2026-02-04Paterson DanSale (S)Common Stock970USD 6.69USD 6,489SEC filing ↗
2026-01-21Paterson DanAward / grant (A)Common Stock213,785USD 0.00USD 0SEC filing ↗
2026-01-21Calkins DanielAward / grant (A)Common Stock16,665USD 0.00USD 0SEC filing ↗
2026-01-12Paterson DanSale (S)Common Stock10,321USD 7.16USD 73,898SEC filing ↗
2026-01-12Calkins DanielSale (S)Common Stock5,039USD 7.16USD 36,079SEC filing ↗
2025-12-24Calkins DanielSale (S)Common Stock80USD 7.86USD 629SEC filing ↗
2025-12-16Stuglik Brian MSale (S)Common Stock592USD 9.14USD 5,411SEC filing ↗
2025-12-16Paterson DanSale (S)Common Stock393USD 9.14USD 3,592SEC filing ↗
2025-12-16Gagnon Robert E.Sale (S)Common Stock283USD 9.14USD 2,587SEC filing ↗
2025-12-11Paterson DanSale (S)Common Stock2,000USD 10.00USD 20,000SEC filing ↗
2025-12-10Paterson DanSale (S)Common Stock2,000USD 10.07USD 20,140SEC filing ↗
2025-12-09Paterson DanSale (S)Common Stock2,000USD 10.25USD 20,500SEC 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 · —
TickerVSTM
CIK0001526119
SectorHealthcare
IndustryBiotechnology Yahoo Finance
SEC SIC2834 Pharmaceutical Preparations
ExchangeNasdaq

Data coverage

Local Form 4 history225 transaction lines from 2020-03-06 to 2026-10-01
1 P purchase lines · 161 S sale lines · 63 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.