Insider · CIK 0001414656

Lee John Tseng-Chung

CIK 0001414656 Name as filed on the most recent filing

Filed as Lee John Tseng-Chung (26)

31 transaction lines · from 26 filings · filed 2009-03-04 to 2026-08-17 The span is the filing dates this catalog holds, not the entity's full filing history. Absence here is not evidence of absence at the SEC.

How this page attributes a trade

A line appears here when the filing that carries it names this CIK as a reporting owner, not only when the parser picked this CIK as the line's primary owner. That is why a joint filing appears on both owners' pages rather than vanishing from the second one. The catalog never merges two CIKs into one person and never splits one CIK into two: identity here is the SEC's own identifier and nothing else.

01

Issuers this insider has filed against

Ordered by last-seen filing date, newest first. Roles are as filed on the Form 4 and are not normalised.

Fault

This container could not be filled from the store. It is showing nothing because a read failed, not because no insider filed: those are different facts and this catalog will not let one stand in for the other. The last ingest the store recorded was 2026-08-26 05:24 UTC.

No issuer is recorded

The catalog holds no filing linking this CIK to an issuer.

02

Transactions

Every stored Form 4 line naming this reporting owner, newest transaction date first. Each row links to the filing it came from.

31 transactions · Newest transaction date first, id breaking the tie.

Fault

This container could not be filled from the store. It is showing nothing because a read failed, not because no insider filed: those are different facts and this catalog will not let one stand in for the other. The last ingest the store recorded was 2026-08-26 05:24 UTC.

Transactions filed by this insider
Direction Date Code Company Value USD Filing
2026-08-14 S, Open-market sale MKS IncMKSI 3,020,100, disposed Open Form 4 filing 0001049502-26-000113
2026-05-22 S, Open-market sale MKS IncMKSI 3,154,800, disposed Open Form 4 filing 0001049502-26-000088
2026-02-20 S, Open-market sale MKS IncMKSI 4 lines 7,703,242, disposed Open Form 4 filing 0001049502-26-000030
2018-02-20 S, Open-market sale MKS Instruments IncMKSI 2 lines 1,549,782, disposed Open Form 4 filing 0001127602-18-007496
2017-11-13 S, Open-market sale MKS Instruments IncMKSI 219,784, disposed Open Form 4 filing 0001127602-17-031987
2017-02-22 S, Open-market sale MKS Instruments IncMKSI 1,001,765, disposed Open Form 4 filing 0001127602-17-007958
2016-08-10 S, Open-market sale MKS Instruments IncMKSI 461,524, disposed Open Form 4 filing 0001127602-16-060061
2016-02-26 S, Open-market sale MKS Instruments IncMKSI 32,504, disposed Open Form 4 filing 0001127602-16-043799
2016-02-17 S, Open-market sale MKS Instruments IncMKSI 45,599, disposed Open Form 4 filing 0001127602-16-042209
2016-02-11 S, Open-market sale MKS Instruments IncMKSI 2 lines 45,863, disposed Open Form 4 filing 0001127602-16-040906
2015-05-14 S, Open-market sale MKS Instruments IncMKSI 390,750, disposed Open Form 4 filing 0001127602-15-017406
2014-06-13 S, Open-market sale MKS Instruments IncMKSI 269,696, disposed Open Form 4 filing 0001127602-14-020864
2013-11-29 P, Open-market purchase MKS Instruments IncMKSI 10,625, acquired Open Form 4 filing 0001127602-13-033590
2013-05-31 P, Open-market purchase MKS Instruments IncMKSI 10,625, acquired Open Form 4 filing 0001127602-13-019186
2013-03-14 S, Open-market sale MKS Instruments IncMKSI 225,502, disposed Open Form 4 filing 0001127602-13-010852
2012-11-30 P, Open-market purchase MKS Instruments IncMKSI 9,876, acquired Open Form 4 filing 0001127602-12-032979
2012-08-06 S, Open-market sale MKS Instruments IncMKSI 76,498, disposed Open Form 4 filing 0001127602-12-023906
2012-03-09 S, Open-market sale MKS Instruments IncMKSI 250,338, disposed Open Form 4 filing 0001127602-12-010344
2011-11-08 S, Open-market sale MKS Instruments IncMKSI 86,545, disposed Open Form 4 filing 0001127602-11-029304
2011-03-17 S, Open-market sale MKS Instruments IncMKSI 130,382, disposed Open Form 4 filing 0001127602-11-010676
2011-03-08 S, Open-market sale MKS Instruments IncMKSI 195,025, disposed Open Form 4 filing 0001127602-11-009578
2010-11-05 S, Open-market sale MKS Instruments IncMKSI 51,278, disposed Open Form 4 filing 0001127602-10-027520
2010-04-26 S, Open-market sale MKS Instruments IncMKSI 159,945, disposed Open Form 4 filing 0001127602-10-012085
2010-02-11 S, Open-market sale MKS Instruments IncMKSI 45,145, disposed Open Form 4 filing 0001127602-10-004747
2009-07-28 S, Open-market sale MKS Instruments IncMKSI 118,357, disposed Open Form 4 filing 0001127602-09-016388
2009-03-02 S, Open-market sale MKS Instruments IncMKSI 18,715, disposed Open Form 4 filing 0001127602-09-005885

This column is intentionally blank

No transaction line is stored for this reporting owner, though the catalog holds filings naming them. That happens when the filings report only holdings or only positions the store does not carry, and when a parse failed; each filing page states its own parse status.

Codes on this page
S, Open-market sale
Open-market sale
P, Open-market purchase
Open-market purchase
Relationships on this page
D, Director
Director
O, Officer
Officer

Every value is as reported on the Form 4, totalled to the dollar. Share counts, the price per share and the full list of reporting owners are on each filing's own page, which every row here opens. A row marked n lines adds up that many filed lines of one filing, on one day, on one side of the market; a filing whose lines fall across two pages is left as its lines on both, so no total here is ever short.

What this insider's stored lines contain

Exact counts over every stored line for this entity. This is a statement of composition, not a filter: the only filter this page offers is the open-market one above, because that is the only one an index serves today.

  • Open-market purchase 3
  • Open-market sale 28
  • Option exercise 0
  • Grant or award 0
  • Tax withholding 0
  • Disposition to the issuer 0
  • In-the-money option exercise 0

How to cite this page

ebomi catalog. Lee John Tseng-Chung, insider transactions. Retrieved 2026-08-27 from https://ebomi.com/insider/0001414656

Balogh, A. Insider trading. Scientific Data 10, 237 (2023) doi:10.1038/s41597-023-02147-6

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