Transaction · 0001049502-26-000113

Lee John Tseng-Chung

Lee John Tseng-Chung, PRES, CEO, reported an open-market or private sale at MKS INC involving 10000.000000 shares for an estimated $3020100.00. Reported holdings after the transaction were 134776.266700 shares. The stored filing text includes a detected 10b5-1 reference.

Open-market sellSEC transaction code SPRES, CEO
MKSIMKS INC
Trade date
Aug 14, 2026
Filing date
Aug 17, 2026
View on SEC Insider profile
Estimated value-$3.02MShares × reported price
Shares traded10.0k$302.01 per share
Holdings after134kDirect
% of reported position traded6.91%This security and ownership context
How reported position traded is calculated

Shares sold ÷ (holdings after + shares sold). Estimated position before: 144,776.2667 shares.

Row-level estimate for this security and ownership context, not the insider’s complete portfolio. Joint ownership, other transactions in the filing, amendments and footnotes can affect interpretation.

MKSI price since this filing

Daily closing prices, with the filing date and available return windows
MKSI · Daily closing priceLoading daily prices…
Filing dateReturn windows appear as prices become available.
Pre-filing1mo ago +10.3%1w ago -4.9%1d ago -4.5%
Returns since7d -16.1%30d -26.6%90d180d1y

Transaction facts

Stored Form 4 columns with their raw values

Non-derivative
Type
Sell
Code S
Identifier
0001049502-26-000113
Common Stock
Transaction date
Aug 14, 2026
Filed Aug 17, 2026, 02:11 PM · 3d delay
Shares
10,000 sh
$302.01 per share
Estimated value
-$3.02M
Computed from shares × price
Holdings after
134,776.2667 sh
Direct

Filing signal explanations

Badges describe filing facts only — not predictions.

Cluster 14dRepeat 30dPattern $100kLarge $1.00M
Direct Ownership Large Sale 10b5-1 Detected
Filing-only score

-4 points

Compact filing score computed from stored Form 4 facts. Version v1.

Neutral filing signal

This filing is broadly neutral on the filing-only scale. The Form 4 facts do not strongly tilt positive or negative.

How this score is calculated
  • direct_ownership+6 points

    direct_or_indirect_ownership = D

    Direct ownership reports the insider's personal stake.
  • tenb5_1_detected-10 points

    is_10b5_1 = true

    Stored filing content includes detected 10b5-1 language.
Read the scoring methodology

Signed filing-only points, not a probability or expected return. Version v1.

Reported relationships & other filings

Form 4 relationship flags and nearby filing context

Reported roles

President & CEO

Officer YesDirector Yes10% NoOther No
Footnotes & amended
  1. F1

    This transaction was effected pursuant to a Rule 10b5-1 trading plan adopted by the reporting person on February 20, 2026.

Original filing · 0001049502-26-000113
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