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

MKS INC

MKSI · Nasdaq · CIK 0001049502 · Technology · Scientific & Technical Instruments

INSIDER SIGNAL

No active buy signal

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

33 Form 4 transaction lines observed in the same window
26 sales · 7 option, withholding, award, gift or other lines

Last qualifying purchase2023-11-07 · Henry David Philip · $170.8K

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
Mora ElizabethDirector
○▼▼
Moloney Jacqueline FDirector
○▼▼
Schreiner James AlanEVP & COO
▼▼
Henry David PhilipEVP, Global Str Mktg & GM, MSD
▼▼
Donahue Joseph BDirector
○▼
COLELLA GERALD GDirector
○▼
● Purchase▼ Sale○ Other

Showing the six most active owners; 9 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: 2023-11-07 · Henry David Philip.

Recent Form 4 activity

0Purchases
46Sales
67Other Form 4 lines
52SEC filings · 365 days
BUYING0 qualifying P line(s) · 180 days
SELLING26 sale line(s) · context only
OTHER7 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
5,086,476
Previous report
6,074,579
Avg daily volume
1,205,856
Days to cover
4.2

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
2023-11-07Henry David PhilipPurchase (P)Common Stock2,500USD 68.34USD 170,850SEC filing ↗
2022-08-01COLELLA GERARD GPurchase (P)Common Stock1,000USD 117.51USD 117,510SEC filing ↗
2022-08-01CANNONE PETER IIIPurchase (P)Common Stock250USD 120.06USD 30,015SEC filing ↗

Form 4 evidence

113 transaction lines in the latest 365-day window; 554 in local history.

DateOwnerTypeSecuritySharesAvg. priceApprox. valueSource
2026-09-01Mora ElizabethSale (S)Common Stock300USD 250.96USD 75,288SEC filing ↗
2026-08-14Lee John Tseng-ChungSale (S)Common Stock10,000USD 302.01USD 3,020,100SEC filing ↗
2026-08-03Williams John EdwardSale (S)Common Stock457USD 288.31USD 131,758SEC filing ↗
Show recent Form 4 evidence (30 grouped rows)
DateOwnerTypeSecuritySharesAvg. priceApprox. valueSource
2026-09-01Mora ElizabethSale (S)Common Stock300USD 250.96USD 75,288SEC filing ↗
2026-08-14Lee John Tseng-ChungSale (S)Common Stock10,000USD 302.01USD 3,020,100SEC filing ↗
2026-08-03Williams John EdwardSale (S)Common Stock457USD 288.31USD 131,758SEC filing ↗
2026-06-12Schreiner James AlanSale (S)Common Stock3,500USD 345.82USD 1,210,364SEC filing ↗
2026-06-10Schreiner James AlanSale (S)Common Stock781USD 317.42USD 247,905SEC filing ↗
2026-06-05McCarthy Michelle MSale (S)Common Stock2,434USD 315.23USD 767,270SEC filing ↗
2026-06-01Mora ElizabethSale (S)Common Stock300USD 318.02USD 95,406SEC filing ↗
2026-06-01Henry David PhilipSale (S)Common Stock6,000USD 314.43USD 1,886,580SEC filing ↗
2026-05-27Donahue Joseph BSale (S)Common Stock2,100USD 327.95USD 688,695SEC filing ↗
2026-05-27COLELLA GERALD GSale (S)Common Stock20,000USD 333.40USD 6,668,076SEC filing ↗
2026-05-26Henry David PhilipSale (S)Common Stock2,500USD 330.50USD 826,250SEC filing ↗
2026-05-22Mayampurath RamakumarSale (S)Common Stock8,810USD 315.48USD 2,779,379SEC filing ↗
2026-05-22Lee John Tseng-ChungSale (S)Common Stock10,000USD 315.48USD 3,154,800SEC filing ↗
2026-05-18CANNONE PETER IIISale (S)Common Stock1,350USD 303.40USD 409,590SEC filing ↗
2026-05-14Moloney Jacqueline FSale (S)Common Stock1,000USD 312.20USD 312,200SEC filing ↗
2026-05-13Moloney Jacqueline FSale (S)Common Stock1,400USD 318.99USD 446,586SEC filing ↗
2026-05-11Taranto Eric RobertSale (S)Common Stock2,849USD 319.93USD 911,327SEC filing ↗
2026-05-11Mora ElizabethAward / grant (A)Common Stock782USD —USD —SEC filing ↗
2026-05-11Moloney Jacqueline FAward / grant (A)Common Stock782USD —USD —SEC filing ↗
2026-05-11JABRE WISSAM GAward / grant (A)Common Stock782USD —USD —SEC filing ↗
2026-05-11Donahue Joseph BAward / grant (A)Common Stock782USD —USD —SEC filing ↗
2026-05-11COLELLA GERALD GAward / grant (A)Common Stock782USD —USD —SEC filing ↗
2026-05-11CANNONE PETER IIIAward / grant (A)Common Stock782USD —USD —SEC filing ↗
2026-05-11Burke Kathleen FlahertySale (S)Common Stock4,355USD 319.94USD 1,393,339SEC filing ↗
2026-05-11Batra RajAward / grant (A)Common Stock782USD —USD —SEC filing ↗
2026-04-17Williams John EdwardOption exercise / conversion (M)Common Stock1,741USD —USD —SEC filing ↗
2026-04-17Williams John EdwardTax withholding (F)Common Stock826USD 269.89USD 222,921SEC filing ↗
2026-04-15McCarthy Michelle MOption exercise / conversion (M)Common Stock3,811USD —USD —SEC filing ↗
2026-04-15McCarthy Michelle MTax withholding (F)Common Stock1,375USD 274.15USD 377,080SEC filing ↗
2026-03-12Moloney Jacqueline FSale (S)Common Stock340USD 213.77USD 72,705SEC 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 · —
TickerMKSI
CIK0001049502
SectorTechnology
IndustryScientific & Technical Instruments Yahoo Finance
SEC SIC3823 Industrial Instruments For Measurement, Display, and Control
ExchangeNasdaq

Data coverage

Local Form 4 history554 transaction lines from 2020-02-04 to 2026-09-01
3 P purchase lines · 124 S sale lines · 427 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.