Industry Insider Activity

Semiconductor Equipment & Materials insider activity

Concentrated executive and director transaction evidence across 22 companies, with acquisition/disposal balance, filing cadence, value concentration, and linked company research.

Latest filing 21 Jul 2026 981 filings tracked

Top-level read

Net insider selling

Semiconductor Equipment & Materials shows 285 acquisition filings against 696 disposal filings. The largest stored filing is $35.2M in AMAT by DICKERSON, GARY E.

Net value $-515.8Macquisitions minus disposals
Companies 22with stored filings
Total filings 981stored transaction rows
Acquisition value $22.3M285 acquisitions
Disposal value $538.1M696 disposals
Largest filing $35.2Mreported transaction value

Filing cadence

Last 12 active months
Mar 2026 30
Apr 2026 169
May 2026 320
Jun 2026 357
Jul 2026 103

Acquisitions 29.1% · Disposals 70.9%

Company Reads

Most active company insider tapes

22 shown

Transaction Evidence

Latest filings in Semiconductor Equipment & Materials

Showing 1-30 of 981
Date -
Symbol ENTGEntegris Inc
Insider DAUWALTER, JAMES EDirector, CEO, President
Side Acquisition
Shares 553310
Value -
Industry Semiconductor Equipment & Materials
Date -
Symbol ENTGEntegris Inc
Insider GEYER, STANDirector
Side Disposal
Shares 688
Value 8889
Industry Semiconductor Equipment & Materials
Date 21 Jul 2026
Symbol IPGPIPG Photonics Corporation
Insider VALENTIN, GAPONTSEV TRUST I10% Owner
Side Disposal
Shares 24347
Value 2484368
Industry Semiconductor Equipment & Materials
Date 21 Jul 2026
Symbol IPGPIPG Photonics Corporation
Insider VALENTIN, GAPONTSEV TRUST I10% Owner
Side Disposal
Shares 23869
Value 2458507
Industry Semiconductor Equipment & Materials
Date 21 Jul 2026
Symbol IPGPIPG Photonics Corporation
Insider VALENTIN, GAPONTSEV TRUST I10% Owner
Side Disposal
Shares 7100
Value 718520
Industry Semiconductor Equipment & Materials
Date 21 Jul 2026
Symbol IPGPIPG Photonics Corporation
Insider VALENTIN, GAPONTSEV TRUST I10% Owner
Side Disposal
Shares 1000
Value 100080
Industry Semiconductor Equipment & Materials
Date 21 Jul 2026
Symbol AEHRAehr Test Systems
Insider SCOTT, GEOFFREY GATESDirector
Side Disposal
Shares 2874
Value 0
Industry Semiconductor Equipment & Materials
Date 20 Jul 2026
Symbol AMKRAmkor Technology Inc
Insider KIM, AGNES CMember of 10% owner group (4)
Side Acquisition
Shares 250000
Value 2370000
Industry Semiconductor Equipment & Materials
Date 20 Jul 2026
Symbol AMKRAmkor Technology Inc
Insider KIM, JAMES J10% Owner, Member of 10% owner group (5)
Side Acquisition
Shares 250000
Value 2370000
Industry Semiconductor Equipment & Materials
Date 20 Jul 2026
Symbol AMKRAmkor Technology Inc
Insider KIM, AGNES CMember of 10% owner group (4)
Side Acquisition
Shares 200000
Value 1972000
Industry Semiconductor Equipment & Materials
Date 20 Jul 2026
Symbol AMKRAmkor Technology Inc
Insider KIM, JAMES J10% Owner, Member of 10% owner group (5)
Side Acquisition
Shares 200000
Value 1972000
Industry Semiconductor Equipment & Materials
Date 20 Jul 2026
Symbol AEHRAehr Test Systems
Insider SPORCK, ALISTAIR NVP Contactor Business Unit
Side Disposal
Shares 334
Value 27071
Industry Semiconductor Equipment & Materials
Date 20 Jul 2026
Symbol AMKRAmkor Technology Inc
Insider KIM, JAMES J10% Owner, Member of 10% owner group (5)
Side Disposal
Shares 250000
Value 0
Industry Semiconductor Equipment & Materials
Date 20 Jul 2026
Symbol AMKRAmkor Technology Inc
Insider KIM, JAMES J10% Owner, Member of 10% owner group (5)
Side Disposal
Shares 200000
Value 0
Industry Semiconductor Equipment & Materials
Date 16 Jul 2026
Symbol AEHRAehr Test Systems
Insider SCOTT, GEOFFREY GATESDirector
Side Disposal
Shares 20000
Value 1642650
Industry Semiconductor Equipment & Materials
Date 16 Jul 2026
Symbol AMKRAmkor Technology Inc
Insider ROGERS, MARK NEVP & General Counsel
Side Disposal
Shares 5000
Value 325600
Industry Semiconductor Equipment & Materials
Date 16 Jul 2026
Symbol AMKRAmkor Technology Inc
Insider ROGERS, MARK NEVP & General Counsel
Side Acquisition
Shares 5000
Value 37000
Industry Semiconductor Equipment & Materials
Date 16 Jul 2026
Symbol AEHRAehr Test Systems
Insider SCOTT, GEOFFREY GATESDirector
Side Disposal
Shares 10000
Value 0
Industry Semiconductor Equipment & Materials
Date 16 Jul 2026
Symbol AMKRAmkor Technology Inc
Insider ROGERS, MARK NEVP & General Counsel
Side Disposal
Shares 5000
Value 0
Industry Semiconductor Equipment & Materials
Date 15 Jul 2026
Symbol TERTeradyne Inc
Insider SMITH, GREGORY STEPHENDirector, President and CEO
Side Disposal
Shares 4000
Value 1425240
Industry Semiconductor Equipment & Materials
Date 15 Jul 2026
Symbol TERTeradyne Inc
Insider MATZ, MARILYNDirector
Side Disposal
Shares 1200
Value 427572
Industry Semiconductor Equipment & Materials
Date 15 Jul 2026
Symbol FORMFormFactor Inc
Insider SLESSOR, MIKEDirector, CEO
Side Disposal
Shares 1650
Value 193694
Industry Semiconductor Equipment & Materials
Date 15 Jul 2026
Symbol FORMFormFactor Inc
Insider SLESSOR, MIKEDirector, CEO
Side Disposal
Shares 1041
Value 121339
Industry Semiconductor Equipment & Materials
Date 15 Jul 2026
Symbol FORMFormFactor Inc
Insider SLESSOR, MIKEDirector, CEO
Side Disposal
Shares 868
Value 105288
Industry Semiconductor Equipment & Materials
Date 15 Jul 2026
Symbol FORMFormFactor Inc
Insider SLESSOR, MIKEDirector, CEO
Side Disposal
Shares 706
Value 83456
Industry Semiconductor Equipment & Materials
Date 15 Jul 2026
Symbol COHUCohu Inc
Insider BOHRSON, CHRISTOPHERSr VP & Chief Customer Officer
Side Disposal
Shares 1000
Value 57920
Industry Semiconductor Equipment & Materials
Date 15 Jul 2026
Symbol FORMFormFactor Inc
Insider SLESSOR, MIKEDirector, CEO
Side Disposal
Shares 300
Value 36174
Industry Semiconductor Equipment & Materials
Date 15 Jul 2026
Symbol FORMFormFactor Inc
Insider SLESSOR, MIKEDirector, CEO
Side Disposal
Shares 170
Value 20244
Industry Semiconductor Equipment & Materials
Date 15 Jul 2026
Symbol ACLSAxcelis Technologies Inc
Insider RYZHIK, DAVIDSVP Interim CFO
Side Disposal
Shares 127
Value 18416
Industry Semiconductor Equipment & Materials
Date 15 Jul 2026
Symbol ACLSAxcelis Technologies Inc
Insider RYZHIK, DAVIDSVP Interim CFO
Side Disposal
Shares 94
Value 13631
Industry Semiconductor Equipment & Materials