Ownership Submission
FORM 4
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

Filed pursuant to Section 16(a) of the Securities Exchange Act of 1934, Section 17(a) of the Public Utility Holding Company Act of 1935 or Section 30(h) of the Investment Company Act of 1940
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(Print or Type Responses)
1. Name and Address of Reporting Person *
INVESTOR AB
  2. Issuer Name and Ticker or Trading Symbol
NASDAQ OMX GROUP, INC. [NDAQ]
5. Relationship of Reporting Person(s) to Issuer
(Check all applicable)
_____ Director __X__ 10% Owner
_____ Officer (give title below) _____ Other (specify below)
(Last)
(First)
(Middle)
ARSENALSGATAN 8C, S-103 32
3. Date of Earliest Transaction (Month/Day/Year)
05/14/2012
(Street)

STOCKHOLM, V7 00000
4. If Amendment, Date Original Filed(Month/Day/Year)
05/16/2012
6. Individual or Joint/Group Filing(Check Applicable Line)
___ Form filed by One Reporting Person
_X_ Form filed by More than One Reporting Person
(City)
(State)
(Zip)
Table I - Non-Derivative Securities Acquired, Disposed of, or Beneficially Owned
1.Title of Security
(Instr. 3)
2. Transaction Date (Month/Day/Year) 2A. Deemed Execution Date, if any (Month/Day/Year) 3. Transaction 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 05/14/2012   P   300,000 A $ 23.5345 (1) (3) 19,254,142 (3) I See footnote (2)

Reminder: Report on a separate line for each class of securities beneficially owned directly or indirectly.
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Table II - Derivative Securities Acquired, Disposed of, or Beneficially Owned
(e.g., puts, calls, warrants, options, convertible securities)
1. Title of Derivative Security
(Instr. 3)
2. Conversion or Exercise Price of Derivative Security 3. Transaction Date (Month/Day/Year) 3A. Deemed Execution Date, if any (Month/Day/Year) 4. Transaction 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
(Month/Day/Year)
7. Title and Amount of Underlying Securities
(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

Reporting Owners

Reporting Owner Name / Address Relationships
 Director  10% Owner  Officer  Other
INVESTOR AB
ARSENALSGATAN 8C, S-103 32
STOCKHOLM, V7 00000
    X    
Patricia Holding AB
ARSENALSGATAN 8C, S-103 32
STOCKHOLM, V7 00000
    X    

Signatures

 Investor AB By: /s/ Petra Hedengran Name: Petra Hedengran Title: Managing Director and General Counsel   05/23/2012
**Signature of Reporting Person Date

 Patricia Holding AB By: /s/ Anna Troedsson Wiklander Name: Anna Troedsson Wiklander Title: Chair of the Board By: /s/ Louis de Geer Name: Louis de Geer Title: Board Member   05/23/2012
**Signature of Reporting Person Date

Explanation of Responses:

* If the form is filed by more than one reporting person, see Instruction 4(b)(v).
** Intentional misstatements or omissions of facts constitute Federal Criminal Violations. See 18 U.S.C. 1001 and 15 U.S.C. 78ff(a).
(1) This price represents the approximate weighted average price per share of shares of common stock of NASDAQ OMX Group, Inc. (the "Issuer"), par value $0.01 per share (the "Common Stock"), of purchases that were executed at prices ranging from $23.17 to $23.60 per share. Investor AB and Patricia Holding AB undertake to provide, upon request by the Securities and Exchange Commission staff, the Issuer or a security holder of the Issuer, full information about the number of shares of Common Stock purchased at each price.
(2) These shares of Common Stock are held by Patricia Holding AB. Investor AB is the sole shareholder of Patricia Holding AB.
(3) This amendment is being filed to add the price information set forth in footnote 1 and to correct the Total Amount of Securities Beneficially Owned.

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