FORM 4
[X] Check this box if no longer subject to Section 16. Form 4 or Form 5 obligations may continue. See Instruction 1(b).         
UNITED STATES SECURITIES AND EXCHANGE COMMISSION
Washington, D.C. 20549

STATEMENT OF CHANGES IN BENEFICIAL OWNERSHIP OF SECURITIES
                                                                                  
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OMB Number: 3235-0287
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Filed pursuant to Section 16(a) of the Securities Exchange Act of 1934 or Section 30(h) of the Investment Company Act of 1940
                      

1. Name and Address of Reporting Person *

SHAPIRO LEE		 2. Issuer Name and Ticker or Trading Symbol

Medidata Solutions, Inc. [ MDSO ] 		5. Relationship of Reporting Person(s) to Issuer (Check all applicable)

__X__ Director                    _____ 10% Owner
_____ Officer (give title below)    _____ Other (specify below)
(Last)          (First)          (Middle)

C/O MEDIDATA SOLUTIONS, INC., 350 HUDSON STREET, 9TH FLOOR		 3. Date of Earliest Transaction (MM/DD/YYYY)

10/28/2019
(Street)

NEW YORK, NY 10014
(City)        (State)        (Zip)
4. If Amendment, Date Original Filed (MM/DD/YYYY)

 
 6. Individual or Joint/Group Filing (Check Applicable Line)

_X _ Form filed by One Reporting Person
___ Form filed by More than One Reporting Person

Table I - Non-Derivative Securities Acquired, Disposed of, or Beneficially Owned
1.Title of Security
(Instr. 3) 		2. Trans. Date 2A. Deemed Execution Date, if any 3. Trans. Code
(Instr. 8) 		4. Securities Acquired (A) or Disposed of (D)
(Instr. 3, 4 and 5) 		5. Amount of Securities Beneficially Owned Following Reported Transaction(s)
(Instr. 3 and 4) 		6. Ownership Form: Direct (D) or Indirect (I) (Instr. 4) 7. Nature of Indirect Beneficial Ownership (Instr. 4)
Code V Amount (A) or (D) Price
Common Stock  10/28/2019 (1)   D    28827 (2) D $92.25 (2) 0  D   

Table II - Derivative Securities Beneficially Owned (e.g., puts, calls, warrants, options, convertible securities)
1. Title of Derivate Security
(Instr. 3) 		2. Conversion or Exercise Price of Derivative Security 3. Trans. Date 3A. Deemed Execution Date, if any 4. Trans. Code
(Instr. 8) 		5. Number of Derivative Securities Acquired (A) or Disposed of (D)
(Instr. 3, 4 and 5) 		6. Date Exercisable and Expiration Date 7. Title and Amount of Securities Underlying Derivative Security
(Instr. 3 and 4) 		8. Price of Derivative Security
(Instr. 5) 		9. Number of derivative Securities Beneficially Owned Following Reported Transaction(s) (Instr. 4) 10. Ownership Form of Derivative Security: Direct (D) or Indirect (I) (Instr. 4) 11. Nature of Indirect Beneficial Ownership (Instr. 4)
Code V (A) (D) Date Exercisable Expiration Date Title Amount or Number of Shares
Stock Option (right to buy)  $11.5  10/28/2019    D        4494 (3)   (4) 5/31/2021  Common Stock  4494.0 (3)  (3) 0  D   
Stock Option (right to buy)  $13.98  10/28/2019    D        5214 (3)   (4) 5/16/2022  Common Stock  5214.0   (3) 0  D   

Explanation of Responses:
(1)  On October 28, 2019, pursuant to the Agreement and Plan of Merger, dated as of June 11, 2019, by and among Dassault Systemes SE ("DS"), Dassault Systemes Americas Corp., a Delaware corporation ("Parent"), 3DS Acquisition 6 Corp., a Delaware corporation and a wholly-owned subsidiary of Parent ("Merger Sub"), and Medidata Solutions, Inc., a Delaware corporation (the "Issuer"), Merger Sub merged with and into the Issuer, with the Issuer surviving as a wholly-owned subsidiary of Parent and an indirect wholly-owned subsidiary of DS (the "Merger").
(2)  Disposed of pursuant to the Merger Agreement and by virtue of the Merger, in which each share of Medidata common stock, par value $0.01 per share ("Issuer Common Stock"), issued and outstanding immediately prior to the completion of the Merger (other than restricted share awards held by continuing employees) was converted into the right to receive $92.25 in cash and without interest (the "Merger Consideration").
(3)  Pursuant to the Merger Agreement and by virtue of the Merger, each option to purchase Issuer Common Stock will be cancelled and converted into the right to receive an amount in cash (without interest and subject to deduction for any required withholding tax) equal to the product of (1) the total number of shares of Issuer Common Stock then covered by such option multiplied by (2) the excess, if any, of $92.25 per share over the exercise price per share under such option.
(4)  These options are fully vested and exercisable.

Reporting Owners
Reporting Owner Name / Address
Relationships
Director 10% Owner Officer Other
SHAPIRO LEE
C/O MEDIDATA SOLUTIONS, INC.
350 HUDSON STREET, 9TH FLOOR
NEW YORK, NY 10014 		X



Signatures
/s/ Michael I. Otner, Attorney-in-Fact 10/28/2019
**Signature of Reporting Person Date


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