Exhibit 4(a)6

| |  | Any text removed pursuant to the Company's confidential treatment has been separately submitted with the U.S. Securities and Exchange Commission and is marked [***] herein.
| |  | ----------------------------------------------------------------------------------------------------------------------------------------------------------------------------

Amendment 158
to the
Amended and Restated License Agreement
for the Use and Marketing of Programming Materials
dated May 31, 1996 (the "1996 Agreement")
between
International Business Machines Corporation (IBM)
and
Dassault Systemes, S.A. (OWNER)

This Amendment ("Amendment") is entered into by and between International Business Machines Corporation ("IBM"), incorporated under the laws of the State of
New York and Dassault Systemes, S.A. ("OWNER"), a French société anonyme.

Whereas,
OWNER is the owner of 3D/2D Computer Aided Design/Computer Aided Manufacturing/Computer Aided Engineeering/Product Integrated Management software programs marketed under various
trademarks.

Whereas,
the parties wish to add new DELMIA products R17 to the 1996 Agreement.

Whereas,
the parties wish to amend the 1996 Agreement for the purposes of making the changes associated with the foregoing.

Now
therefore, the parties agree as follows:

1.0    Section C.14 DELMIA Products

Attachment XXVI DELMIA Products Attachment added by Amendment 155 is deleted and replaced with the following updated Attachment XXVI DELMIA Products. This
Attachment is the complete listing of all DELMIA Licensed Programs, with changes to the prior version of the Attachment identified per the legend. For the purpose of this Attachment, the term "Bundle"
shall have the same meaning as "Configuration."

Blue and/or + = New Products

Red = Royalty Changes

Purple = Name Change

Black =
No Change
^ = Inactive Product

|       |  |                                                                |  | PLC Related Royalty (US Dollars)
|------ |  | -------------------------------------------------------------- |  | --------------------------------
|
|
|1) AG2 |  | DELMIA  DPM Assembly GT 2                                     |  | [***]                           
|2) AP2 |  | DELMIA  DPM Assembly 2                                        |  | [***]                           
|3) BG2 |  | DELMIA  DPM Body In White GT 2                                |  | [***]                           
|4) BP2 |  | DELMIA  DPM Body In White 2                                   |  | [***]                           
|5) BX2 |  | DELMIA  DPM Body In White XT 2                                |  | [***]                           
|6)+DS2 |  | DELMIA  DPM Structure 2                                       |  | [***]                           
|7) EA2 |  | DELMIA  DPM ENVISION Assembly 2                               |  | [***]                           
|8) IG2 |  | DELMIA  DPM Inspection Off-line Programming & Simulation GT 2 |  | [***]                           
|9) II2 |  | DELMIA  DPM Inspect 2                                         |  | [***]                           

1

---



|10) IO2    |  | DELMIA  DPM Inspection Off-line Programming & Simulation 2                                      |  | [***] |  |  |  | 
|---------- |  | ------------------------------------------------------------------------------------------------ |  | ----- |  |  |  | 
|11) IX2    |  | DELMIA  Inspection XT 2                                                                         |  | [***] |  |  |  | 
|12) MA3    |  | DELMIA  Tolerance Analysis of Deformable
Assembly 3                                             |  | [***] |  |  |  | 
|13) MB2    |  | DELMIA  NC Machine Tool Builder 2 (was DELMIA  Machine Tool Builder 2)                         |  | [***] |  |  |  | 
|14)+MF2    |  | DELMIA  Manufacturing Simulation
Foundation 2                                                   |  | [***] |  |  |  | 
|15)+MP2    |  | DELMIA  Machining Foundation 2                                                                  |  | [***] |  |  |  | 
|16)+PD2    |  | DELMIA  DPM Process Definition 2                                                                |  | [***] |  |  |  | 
|17) PG2    |  | DELMIA  DPM Machining GT 2 (was DELMIA  DPM Powertrain GT 2)                                   |  | [***] |  |  |  | 
|18) PP2    |  | DELMIA  DPM Machining 2 (was DELMIA  DPM Powertrain 2)                                         |  | [***] |  |  |  | 
|19)+PR2    |  | DELMIA  DPM Review 2                                                                            |  | [***] |  |  |  | 
|20) QCP    |  | DELMIA  CENIT cPost                                                                             |  | [***] |  |  |  | 
|21) SF2    |  | DELMIA  DPM Shop 2 (was DELMIA  DPM Shop Floor 2)                                              |  | [***] |  |  |  | 
|22)+SP2    |  | DELMIA  Structure Manufacturing Shop 2                                                          |  | [***] |  |  |  | 
|23)+SR2    |  | DELMIA  Shop Order Release 2                                                                    |  |       |  |  |  | 
|24) VT2    |  | DELMIA  NC Machine Tool Simulation 2 (was DELMIA  Machine Tool Path Simulation 2)              |  | [***] |  |  |  | 
|25) WG2    |  | DELMIA  Robotics Simulation GT 2                                                                |  | [***] |  |  |  | 
|25) WL2    |  | DELMIA  Robotics Simulation 2                                                                   |  | [***] |  |  |  | 
|27) WX2    |  | DELMIA  Robotics Simulation XT 2                                                                |  | [***] |  |  |  | 
|28) XG2    |  | DELMIA  DPM Process & Resource
Definition GT 2 (was DELMIA  DPM Process Definition GT 2)       |  | [***] |  |  |  | 
|29) XP2    |  | DELMIA  DPM Process & Resource
Definition 2 (was DELMIA  DPM Process Definition 2)             |  | [***] |  |  |  | 
|30)^ZM2    |  | DELMIA  Virtual NC Zip Mill 2                                                                   |  | [***] |  |  |  | 
|31) PPRAG2 |  | DELMIA  DPM Assembly GT 2- Mfg Hub Bundle                                                       |  | [***] |  |  |  | 
|32)^PPRAME |  | DELMIA  Advanced Manufacturing Engineer                                                         |  | [***] |  |  |  | 
|33) PPRAP2 |  | DELMIA  DPM Assembly 2  Mfg Hub Bundle                                                         |  | [***] |  |  |  | 
|34) PPRBG2 |  | DELMIA  DPM Body In White GT 2  Mfg Hub
Bundle                                                 |  | [***] |  |  |  | 
|35) PPRBP2 |  | DELMIA  DPM Body In White 2  Mfg Hub
Bundle                                                    |  | [***] |  |  |  | 
|36) PPRBX2 |  | DELMIA  DPM Body In White XT 2  Mfg Hub
Bundle                                                 |  | [***] |  |  |  | 
|37) PPREA2 |  | DELMIA  DPM ENVISION Assembly 2  Mfg Hub
Bundle                                                |  | [***] |  |  |  | 
|38)^PPRME  |  | DELMIA  Manufacturing Engineer                                                                  |  | [***] |  |  |  | 
|39)+PPRPD2 |  | DELMIA  DPM Process Definition 2  Mfg Hub
Bundle                                               |  | [***] |  |  |  | 
|40) PPRPG2 |  | DELMIA  DPM Machining GT 2  Mfg Hub
Bundle (was DELMIA  DPM Powertrain GT 2  Mfg Hub Bundle) |  | [***] |  |  |  | 
|41) PPRPP2 |  | DELMIA  DPM Machining 2  Mfg Hub Bundle                                                        |  | [***] |  |  |  | 

2

---



|            |  | (was DELMIA  DPM Powertrain 2  Mfg Hub Bundle)                                                                          |  |       |  |  |  | 
|----------- |  | ------------------------------------------------------------------------------------------------------------------------- |  | ----- |  |  |  | 
|42)+PPRPR2  |  | DELMIA  DPM Review 2  Mfg Hub Bundle                                                                                    |  | [***] |  |  |  | 
|43) PPRSF2  |  | DELMIA  DPM Shop 2  Mfg Hub Bundle (was DELMIA  DPM Shop Floor  Mfg Hub Bundle)                                       |  | [***] |  |  |  | 
|44) PPRWG2  |  | DELMIA  Robotics Simulation GT 2  Mfg Hub
Bundle                                                                        |  | [***] |  |  |  | 
|45) PPRWL2  |  | DELMIA  Robotics Simulation 2  Mfg Hub
Bundle                                                                           |  | [***] |  |  |  | 
|46) PPRWX2  |  | DELMIA  Robotics Simulation XT 2  Mfg
Hub Bundle                                                                        |  | [***] |  |  |  | 
|47) PPRXG2  |  | DELMIA  DPM Process & Resource
Definition GT 2  Mfg Hub Bundle (was DELMIA  DPM Process Definition GT Mfg Hub Bundle) |  | [***] |  |  |  | 
|48) PPRXP2  |  | DELMIA  DPM Process & Resource
Definition 2  Mfg Hub Bundle (was DELMIA  DPM Process Definition 2  MfgHub Bundle)     |  | [***] |  |  |  | 
|49)^SF2-B   |  | DELMIA  Shop Floor 2 Bundle                                                                                              |  | [***] |  |  |  | 
|50)+SR2-B-1 |  | DELMIA  Shop Order Release 2 Site License
Bundle  Small                                                                 |  | [***] |  |  |  | 
|51)+SR2-B-2 |  | DELMIA  Shop Order Release 2 Site License
Bundle  Medium                                                                |  | [***] |  |  |  | 
|52)+SR2-B-3 |  | DELMIA  Shop Order Release 2 Site License
Bundle  Large                                                                 |  | [***] |  |  |  | 

|
|

|            |  |                                                   |  | PLC Related Royalty (US Dollars)
|----------- |  | ------------------------------------------------- |  | --------------------------------
|
|
|53)+APN-A   |  | DELMIA  DPM Assembly Process Planner 2           |  |                                 
|54) APS-A   |  | DELMIA  DPM Assembly Process Simulation 2        |  |                                 
|55) ARW-A   |  | DELMIA  Arc Welding 2                            |  |                                 
|56) BWP-A   |  | DELMIA  DPM Fastening Process Planner 2          |  |                                 
|57) DBG-A   |  | DELMIA  Device Building 2                        |  |                                 
|58)+DHR-A   |  | DELMIA  DPM Human Review 2                       |  |                                 
|59)+DST-A   |  | DELMIA  DPM Structure Lofting 2                  |  |                                 
|60) EIP-A   |  | DELMIA  DPM Engineering Requirements Planner 2   |  |                                 
|61) EHS-A   |  | DELMIA  Electrical Harness Process Simulation 2  |  |                                 
|62)+ELR-A   |  | DELMIA  Electrical Review 2                      |  |                                 
|63) IDP-A/S |  | DELMIA  MULTICAx ID Plug-in                      |  |                                 
|64)+LE1-A   |  | DELMIA Automation  CLM SFC Editor 1              |  |                                 
|65)+LS1-A   |  | DELMIA Automation  CLM Simulation Engine 1       |  |                                 
|66) MAP-A/S |  | DELMIA  MULTICAx AD Plug-in                      |  |                                 
|67) MEP-A/S |  | DELMIA  MULTICAx SE Plug-in                      |  |                                 
|68) MEQ-A   |  | DELMIA  Equipment Arrangement 2                  |  |                                 
|69) MFR-A/S |  | DELMIA  DMU Fastening Review 2                   |  |                                 
|70) MFT-A   |  | DELMIA  3D Functional Tolerancing & Annotation 2 |  |                                 
|71)+MG1-A   |  | DELMIA  Generative Drafting 1                    |  |                                 

3

---



|72) MGD-A       |  | DELMIA  Generative Drafting 2                       |  |  |  | [***] |  |      
|--------------- |  | ---------------------------------------------------- |  |  |  | ----- |  | -----
|73) MGP-A/S     |  | DELMIA  MULTICAx IGES Plug-in                       |  |  |  | [***] |  | [***]
|74) MHA-A/S     |  | DELMIA  Human Activity Analysis 2                   |  |  |  | [***] |  | [***]
|75) MHB-A/S     |  | DELMIA  Human Builder 2                             |  |  |  | [***] |  | [***]
|76) MHM-A/S     |  | DELMIA  Human Measurements Editor 2                 |  |  |  | [***] |  | [***]
|77) MHP-A/S     |  | DELMIA  Human Posture Analysis 2                    |  |  |  | [***] |  | [***]
|78) MHT-A/S     |  | DELMIA  Human Task Simulation 2                     |  |  |  | [***] |  | [***]
|79) MID-A       |  | DELMIA  Interactive Drafting 1                      |  |  |  | [***] |  |      
|80) MIG-A       |  | DELMIA  IGES Interface 1                            |  |  |  | [***] |  |      
|81)^MIP-A/S     |  | DELMIA  MULTICAx I Plug-in                          |  |  |  | [***] |  | [***]
|82) MK1-A/S     |  | DELMIA  Product Knowledge Template 1                |  |  |  | [***] |  | [***]
|83) MKE-A       |  | DELMIA  Knowledge Expert 2                          |  |  |  | [***] |  |      
|84) MMA-A       |  | DELMIA  Prismatic Machining Preparation
Assistant 2 |  |  |  | [***] |  |      
|85) MNV-A       |  | DELMIA  DMU Navigator 2                             |  |  |  | [***] |  |      
|86) MOP-A       |  | DELMIA  DMU Optimizer 2                             |  |  |  | [***] |  |      
|87)^MPP-A/S     |  | DELMIA  MULTICAx P Plug-in                          |  |  |  | [***] |  | [***]
|88) MPS-A       |  | DELMIA  NC Machine Tool Simulation 2                |  |  |  | [***] |  |      
|89)+MRL-A       |  | DELMIA  Resource Layout 2                           |  |  |  | [***] |  |      
|90) MRR-A/S     |  | DELMIA  Real Time Rendering 2                       |  |  |  | [***] |  | [***]
|91) MSA-A       |  | DELMIA  DMU Space Analysis 2                        |  |  |  | [***] |  |      
|92)+MSD-A       |  | DELMIA  Manufacturing System Definition 2           |  |  |  | [***] |  |      
|93) MSP-A/S     |  | DELMIA  MULTICAx Solidworks Plug-in                 |  |  |  | [***] |  | [***]
|94) MST-A       |  | DELMIA  STEP Core Interface 1                       |  |  |  | [***] |  |      
|95) MTP-A/S     |  | DELMIA  MULTICAx STEP Plug-in                       |  |  |  | [***] |  | [***]
|96) MTR-A       |  | DELMIA  DMU Dimensioning & Tolerance Review 1       |  |  |  | [***] |  |      
|97) MTT-A       |  | DELMIA  Machining Tolerancing Assistant 2           |  |  |  | [***] |  |      
|98)^MUP-A/S     |  | DELMIA  MULTICAx U Plug-in                          |  |  |  | [***] |  | [***]
|99) MVG-A/S     |  | DELMIA  NC Manufacturing Verification 2             |  |  |  | [***] |  | [***]
|100) OPL-A      |  | DELMIA  Robotics OLP 2                              |  |  |  | [***] |  |      
|101)+PCR-A      |  | DELMIA  Process Context Builder 2                   |  |  |  | [***] |  |      
|102)+PDP-A/S    |  | DELMIA  MultiCax-PD Plug-in                         |  |  |  | [***] |  | [***]
|103)+PLT-A      |  | DELMIA  Plant Layout 2                              |  |  |  | [***] |  |      
|104)+PRL-A      |  | DELMIA  PPR Manufacturing Lifecycle
Management 2    |  |  |  | [***] |  |      
|105)+PRR-A      |  | DELMIA  PPR Editor 2                                |  |  |  | [***] |  |      
|106) PSY-A      |  | DELMIA  Production System Analysis 2                |  |  |  | [***] |  |      
|107)+PTP-A      |  | DELMIA  DPM Machining Process Planner 2             |  |  |  | [***] |  |      
|108) QFM        |  | DELMIA  CENIT FasTRIM                               |  |  |  | [***] |  |      
|109) QFP        |  | DELMIA  CENIT FasTIP                                |  |  |  | [***] |  |      
|110) RRS-A      |  | DELMIA  RRS I 2                                     |  |  |  | [***] |  |      
|111) RST-A      |  | DELMIA  RRS II 2                                    |  |  |  | [***] |  |      
|112)+SBH-A      |  | DELMIA Automation  CLM System Behavior Definition 2 |  |  |  | [***] |  |      
|113)+SOR-A      |  | DELMIA  Shop Order Release 2                        |  |  |  | [***] |  |      
|114)+SPR-A      |  | DELMIA  Surface Path Generator 2                    |  |  |  | [***] |  |      
|115) SRL-A      |  | DELMIA  Standard Robot Library 2                    |  |  |  | [***] |  |      
|116) TSA-A      |  | DELMIA  Tool Selection Assistant 2                  |  |  |  | [***] |  |      
|117)+UDP-A/S    |  | DELMIA  MultiCAx-UD Plug-in                         |  |  |  | [***] |  | [***]
|118) WKI-A      |  | DELMIA  DPM Work Instructions 2                     |  |  |  | [***] |  |      
|119) WSQ-A      |  | DELMIA  Workcell Sequencing 2                       |  |  |  | [***] |  |      
|120) WSU-A      |  | DELMIA  Device Task Definition 2                    |  |  |  | [***] |  |      
|121) MHBA-AB/SB |  | DELMIA  Human Basic Activities 2                    |  |  |  | [***] |  | [***]
|                |  |                                                      |  |  |  |       |  |      

4

---



|122) MHMC-AB/SB |  | DELMIA  Human Modeling Complete 2 |  |  |  | [***] |  | [***]
|--------------- |  | ---------------------------------- |  |  |  | ----- |  | -----

|
|

|                 |  |                                                    |  | PLC Related Royalty (US Dollars)
|---------------- |  | -------------------------------------------------- |  | --------------------------------
|
|
|123) INDENG      |  | DELMIA  Industrial Engineer                       |  |                                 
|124) INDENGR     |  | DELMIA  Industrial Engineer Rapid                 |  |                                 
|125) PPRL        |  | DELMIA  ENOVIA Manufacturing Hub Access           |  |                                 
|126) PPRNAV      |  | DELMIA  PPR Navigator for
Manufacturing Hub       |  |                                 
|127) PPRNAVR     |  | DELMIA  PPR Navigator for Manufacturing
Hub Rapid |  |                                 
|128) PROCENG     |  | DELMIA  Process Engineer                          |  |                                 
|129) PROCENGR    |  | DELMIA  Process Engineer Rapid                    |  |                                 
|130) PROCRESPLN  |  | DELMIA  Process & Resource Planner                |  |                                 
|131) PROCRESPLNR |  | DELMIA  Process & Resource Planner Rapid          |  |                                 
|132) MU1         |  | DELMIA  DMU Review 1                              |  |                                 

|
|

|             |  |                                                             |  | PLC Related Royalty (US Dollars)
|------------ |  | ----------------------------------------------------------- |  | --------------------------------
|
|
|133) ALB-S   |  | DELMIA  Automatic Line Balancing                           |  |                                 
|134) EPRP-S  |  | DELMIA  Process & Resource Planning                        |  |                                 
|135)^JT-S    |  | DELMIA  JT Files                                           |  |                                 
|136)^LOAD-S  |  | DELMIA  PPR Loader                                         |  |                                 
|137) LP-S    |  | DELMIA  Layout Planning                                    |  |                                 
|138) MCM-S   |  | DELMIA  Manufacturing Change Management                    |  |                                 
|139) PEVAL-S |  | DELMIA  Product Evaluation                                 |  |                                 
|140) WLB-S   |  | DELMIA  Workload Balancing                                 |  |                                 
|141) STM-S   |  | DELMIA  Standard Time Measurement                          |  |                                 
|142) DCS-S   |  | DELMIA  Standard Time Measurement Data
Card Studio         |  |                                 
|143) MOST-S  |  | DELMIA  Standard Time Measurement MOST                     |  |                                 
|144) MTM-1-S |  | DELMIA  Standard Time Measurement MTM-1                    |  |                                 
|145) RWF-S   |  | DELMIA  Standard Time Measurement RWF                      |  |                                 
|146) SAM-S   |  | DELMIA  Standard Time Measurement SAM                      |  |                                 
|147) E4M-S   |  | DELMIA  V4 Engineering Hub to Manufacturing Hub
Connection |  |                                 
|148) E5M-S   |  | DELMIA  V5 Engineering Hub to Manufacturing Hub
Connection |  |                                 
|149) ORL-A   |  | ORACLE Runtime License                                      |  |                                 

|
|

|             |  |                              |  | PLC Related Royalty (US Dollars)
|------------ |  | ---------------------------- |  | --------------------------------
|
|
|150) ENV_TR  |  | ENVISION Telerobotics        |  | [***]                           
|151)^ENV_VE  |  | ENVISION Virtual Environment |  | [***]                           
|152) ENV_VP  |  | ENVISION Virtual Prototyping |  | [***]                           
|153)^ENV_VR  |  | ENVISION Virtual Reality     |  | [***]                           
|154) IGRIP   |  | IGRIP                        |  | [***]                           
|155) INSPECT |  | INSPECT                      |  | [***]                           
|156) QUEST   |  | QUEST                        |  | [***]                           

5

---



|157) QUESTAD  |  | QUEST Advanced         |  | [***] |  |  |  | 
|------------- |  | ---------------------- |  | ----- |  |  |  | 
|158) QUESTEX  |  | QUEST Express          |  | [***] |  |  |  | 
|159) REVIEW   |  | REVIEW                 |  | [***] |  |  |  | 
|160) UARC     |  | UltraArc               |  | [***] |  |  |  | 
|161) UGRIP    |  | UltraGRIP              |  | [***] |  |  |  | 
|162) UPAINT   |  | UltraPaint             |  | [***] |  |  |  | 
|163) USPOT    |  | UltraSpot              |  | [***] |  |  |  | 
|164) VNC      |  | Virtual NC             |  | [***] |  |  |  | 
|165) PPRIGRIP |  | IGRIP  Mfg Hub Bundle |  | [***] |  |  |  | 
|166) PPRQUEST |  | QUEST  Mfg Hub Bundle |  | [***] |  |  |  | 

|
|

|                  |  |                                          |  | PLC Related Royalty (US Dollars)
|----------------- |  | ---------------------------------------- |  | --------------------------------
|
|
|167)^             |  | Additional Controller Family             |  |                                 
|168)^             |  | Additional Robot                         |  |                                 
|169) ARLA/RAPID-A |  | ABB Robot Programming                    |  |                                 
|170) ARWLD-A      |  | Arc Welding                              |  |                                 
|171) ASYPL-A      |  | Assembly Planner                         |  |                                 
|172) AXSVR-A      |  | AXXESS Open Architecture/Virtual Reality |  |                                 
|173) CABLE-A      |  | Cable Simulation                         |  |                                 
|174) CALIB-A      |  | Calibration and Signature                |  |                                 
|175)^CELLCTRLD    |  | Cell Control Design                      |  |                                 
|176)^CELLCTRLM    |  | Cell Control Monitor                     |  |                                 
|177)^CELLLTSI     |  | Cell Control Logic Translator  Siemens  |  |                                 
|178) CLIDB-A      |  | CLI Device Building                      |  |                                 
|179) CMEOP-A      |  | Custom Macro Encryption                  |  |                                 
|180) CMROP-A      |  | Custom Macro Read                        |  |                                 
|181) DEBUR-A      |  | Deburring/Finishing                      |  |                                 
|182) DYNAM-A      |  | Dynamics                                 |  |                                 
|183) ERANL-A      |  | Ergonomics Analysis                      |  |                                 
|184) ERGO-A       |  | Ergonomics                               |  |                                 
|185) HUMAN-A      |  | Human Modeling                           |  |                                 
|186) IDRBT-A      |  | Industrial Robot Library                 |  |                                 
|187) LLTIO-A      |  | Low Level Telerobotic Interface          |  |                                 
|188) MATRM-A      |  | Material Removal                         |  |                                 
|189) MNTWK-A      |  | Floating License, Dissimilar Platforms   |  |                                 
|190) OFLIN-A      |  | Off Line Programming                     |  |                                 
|191) OPTQ-A       |  | OptQUEST                                 |  |                                 
|192) PAINT-A      |  | Paint                                    |  |                                 
|193) PARAS-A      |  | Parasolid Modeling                       |  |                                 
|194) QSTUMAN      |  | QUEST User Manual                        |  |                                 
|195) QSTVROP-A    |  | QUEST Virtual Reality                    |  |                                 
|196) REMDIS-A     |  | Remote Display                           |  |                                 
|197) RRS-D5-A     |  | Realistic Robot Simulation               |  |                                 
|198) SNTWK-A      |  | Floating License, Similar Platforms      |  |                                 
|199) SPWLD-A      |  | Spot Welding                             |  |                                 
|200) STEREO-A     |  | 3D Stereo Vision                         |  |                                 
|201) VCEOP-A      |  | Virtual Collaborative Engineering        |  |                                 
|202) VNCMBO-A     |  | Virtual NC Machine Building              |  |                                 
|203) VRML2.x-A    |  | Virtual Reality Markup Language 2        |  |                                 
|204)^             |  | Zip Mill                                 |  |                                 

6

---



|205) BIGES-A    |  | Batch IGES Translator         |  |  |  | [***] |  | 
|--------------- |  | ----------------------------- |  |  |  | ----- |  | 
|206) CATDIR-U-A |  | CATIA Direct                  |  |  |  | [***] |  | 
|207) DXFTR-A    |  | DXF Translator                |  |  |  | [***] |  | 
|208)^PROEN-A    |  | Pro/Engineer Translator       |  |  |  | [***] |  | 
|209) SDRC-A     |  | SDRC Translator               |  |  |  | [***] |  | 
|210) UGTRN-A    |  | Unigraphics Direct Translator |  |  |  | [***] |  | 
|211) TSACISB-A  |  | ACIS files to/from Parasolid  |  |  |  | [***] |  | 
|212) TSACISU-A  |  | ACIS files to Parasolid       |  |  |  | [***] |  | 
|213) TSCADDSB-A |  | CADDS files to/from Parasolid |  |  |  | [***] |  | 
|214) TSCADDSU-A |  | CADDS files to Parasolid      |  |  |  | [***] |  | 
|215) TSSTEPB-A  |  | STEP files to/from Parasolid  |  |  |  | [***] |  | 
|216)^CELLCTRL   |  | Cell Control                  |  |  |  | [***] |  | 
|217)MNTWK       |  | SNTWK Upgradeto MNTWK         |  |  |  | [***] |  | 
|218) IGES-A     |  | IGES Translator               |  |  |  | [***] |  | 

|
|

|      |  |                        |  | PLC Related Royalty (US Dollars)
|----- |  | ---------------------- |  | --------------------------------
|
|
|219)^ |  | SAFEWORK Basic         |  | [***]                           
|220)^ |  | SAFEWORK Human Builder |  | [***]                           
|221)^ |  | SAFEWORK Humanoid      |  | [***]                           
|222)^ |  | SAFEWORK Pro           |  | [***]                           

|
|

|      |  |                     |  | PLC Related Royalty (US Dollars)
|----- |  | ------------------- |  | --------------------------------
|
|
|223)^ |  | Animation           |  |                                 
|224)^ |  | Anthropometry       |  |                                 
|225)^ |  | Clothing            |  |                                 
|226)^ |  | Collision Detection |  |                                 
|227)^ |  | Ergonomic Analysis  |  |                                 
|228)^ |  | Posture Analysis    |  |                                 
|229)^ |  | Vision              |  |                                 
|230)^ |  | Virtual Reality     |  |                                 
|231)^ |  | IGES Translator     |  |                                 
|232)^ |  | STEP Translator     |  |                                 
|233)^ |  | STL Translator      |  |                                 

2.0    Workstation CATIA Version 4 PRPQ_Products

The following PRPQs are added to Section L2 Workstation CATIA Version 4 Royalty Table:

|IBM PROG. NUMBER |  | PRODUCT NAME                             |  | CONFIG ROYALTY |  | PRODUCT ROYALTY
|---------------- |  | ---------------------------------------- |  | -------------- |  | ---------------
|5799-H70         |  | CATIA CDM-PM(CDP) Integration for V4R2.5 |  | [***]          |  | [***]          
|5799-H71         |  | CATIA 4D Navigator(N4D) for V4R2.5       |  | [***]          |  | [***]          

The
following migration paths for these PRPQs are now available:

|FROM     |  | TO       |  | ROYALTY
|-------- |  | -------- |  | -------
|5626-CDP |  | 5799-H70 |  | [***]  
|5626-N4D |  | 5799-H71 |  | [***]  

7

---



3.0    Correction To PID Trigram:

The trigram for product CATIA-Realistic Shape Optimizer 2 Product was incorrectly listed as 5691-RSD. It is corrected to
be 5691-RSO.

Other
than the changes indicated above, it is understood that all other terms of the 1996 Agreement including all Attachments and Exhibits thereto remain in full force and effect.

If
any provision of this Amendment or the 1996 Agreement (as amended) shall be held to be invalid, illegal or unenforceable, the validity, legality and enforceability of the
remaining provisions shall not in any way be affected or impaired thereby, and such provision shall be deemed to be restated to reflect the original intentions of IBM and OWNER as nearly as possible
in accordance with applicable law(s).

The
parties agree that any reproduction of this Amendment by reliable means (such as facsimile or photocopy) will be considered an original of this Amendment.

|Agreed to: Dassault Systèmes, S.A.   |                                            | Agreed to: International Business Machines Corporation          
|------------------------------------ | ------------------------------------------ | ----------------------------------------------------------------
|By:                                  | /s/THIBAULT DE TERSANTAuthorized Signature |                                                                 
|Name: Thibault de Tersant            |                                            | Name: R. A. Arco                                                
|Title: EVP & Chief Financial Officer |                                            | Title: Director, PLM Product Mgmt. & Worldwide Technical Support
|Date: December 8, 2006               |                                            | Date: January 2, 2007                                           

8

---