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 *
PROMETHEUS SENIOR QUARTERS LLC
  2. Issuer Name and Ticker or Trading Symbol
VENTAS INC [VTR]
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)
30 ROCKEFELLER PLAZA
3. Date of Earliest Transaction (Month/Day/Year)
05/12/2011
(Street)

NEW YORK, NY 10020
4. If Amendment, Date Original Filed(Month/Day/Year)
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 05/12/2011   S   42,949 D (3) $ 55.54 24,915,594 (3) (4) (5) (6) I (3) (4) (5) (6) See Footnote (1) (2) (3) (4) (5) (6)
Common Stock 05/12/2011   J   61,534 D (3) $ 0 24,854,060 (3) (4) (5) (6) I (3) (4) (5) (6) See Footnote (1) (2) (3) (4) (5) (6)

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
PROMETHEUS SENIOR QUARTERS LLC
30 ROCKEFELLER PLAZA
NEW YORK, NY 10020
    X    
Lazard Senior Housing Partners LP
30 ROCKEFELLER PLAZA
NEW YORK, NY 10020
    X    
LSHP Coinvestment Partnership I LP
30 ROCKEFELLER PLAZA
NEW YORK, NY 10020
    X    
LFSRI II CADIM ALTERNATIVE PARTNERSHIP L P
30 ROCKEFELLER PLAZA
NEW YORK, NY 10020
    X    
LF STRATEGIC REALTY INVESTORS II L P
30 ROCKEFELLER PLAZA
NEW YORK, NY 10020
    X    
LFSRI II ALTERNATIVE PARTNERSHIP L P
30 ROCKEFELLER PLAZA
NEW YORK, NY 10020
    X    
LAZARD FRERES REAL ESTATE INVESTORS LLC
30 ROCKEFELLER PLAZA
NEW YORK, NY 10020
    X    
Lazard Senior Housing Partners GP LLC
30 ROCKEFELLER PLAZA
NEW YORK, NY 10020
    X    
LSHP Coinvestment I GP LLC
30 ROCKEFELLER PLAZA
NEW YORK, NY 10020
    X    
Lazard Alternative Investments Holdings LLC
30 ROCKEFELLER PLAZA
NEW YORK, NY 10020
    X    

Signatures

 PROMETHEUS SENIOR QUARTERS LLC, By: Lazard Freres Real Estate Investors L.L.C., the General Partner of its Managing Members, By: /s/ Matthew J Lustig, Managing Principal   05/16/2011
**Signature of Reporting Person Date

 LAZARD SENIOR HOUSING PARTNERS LP, By: Lazard Senior Housing Partners GP LLC, its General Partner, By: /s/ Matthew J. Lustig, Managing Principal and CEO   05/16/2011
**Signature of Reporting Person Date

 LSHP COINVESTMENT PARTNERSHIP I LP, By: LSHP Coinvestment I GP LLC, its General Partner, By: /s/ Matthew J. Lustig, Managing Principal and CEO   05/16/2011
**Signature of Reporting Person Date

 LFSRI II-CADIM ALTERNATIVE PARTNERSHIP L.P., By: Lazard Freres Real Estate Investors L.L.C., its General Partner, By: /s/ Matthew J. Lustig, Managing Principal   05/16/2011
**Signature of Reporting Person Date

 LF STRATEGIC REALTY INVESTORS II L.P., By: Lazard Freres Real Estate Investors L.L.C., its General Partner, By: /s/ Matthew J. Lustig, Managing Principal   05/16/2011
**Signature of Reporting Person Date

 LFSRI II ALTERNATIVE PARTNERSHIP L.P, By: Lazard Freres Real Estate Investors L.L.C., its General Partner, By: /s/ Matthew J. Lustig, Managing Principal   05/16/2011
**Signature of Reporting Person Date

 LAZARD FRERES REAL ESTATE INVESTORS L.L.C., By: /s/ Matthew J. Lustig, Managing Principal   05/16/2011
**Signature of Reporting Person Date

 LAZARD SENIOR HOUSING PARTNERS GP LLC, By: /s/ Matthew J. Lustig, Managing Principal and CEO   05/16/2011
**Signature of Reporting Person Date

 LSHP COINVESTMENT I GP LLC, By: /s/ Matthew J. Lustig, Managing Principal and CEO   05/16/2011
**Signature of Reporting Person Date

 LAZARD ALTERNATIVE INVESTMENTS LLC, By: /s/ Matthew J. Lustig, Managing Director   05/16/2011
**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 statement is being filed jointly by (i) Prometheus Senior Quarters LLC, a Delaware limited liability company ("Prometheus"), (ii) Lazard Senior Housing Partners LP, a Delaware limited partnership ("LSHP"), (iii) LSHP Coinvestment Partnership I LP, a Delaware limited partnership ("LSHP Coinvest" and, together with Prometheus and LSHP, the "Funds"), (iv) LFSRI II-CADIM Alternative Partnership L.P., a Delaware limited partnership, (v) LF Strategic Realty Investors II L.P., a Delaware limited partnership, (vi) LFSRI II Alternative Partnership L.P., a Delaware limited partnership, (vii) Lazard Freres Real Estate Investors L.L.C., a New York limited liability company ("LFREI"), (viii) Lazard Senior Housing Partners GP LLC, a Delaware limited liability company ("LSHP GP"),
(2) [continued from Footnote 1](ix) LSHP Coinvestment I GP LLC, a Delaware limited liability company ("LSHP Coinvest GP"), (x) Lazard Alternative Investments LLC, a Delaware limited liability company ("LAI"), (xi) Lazard Alternative Investments Holdings LLC, a Delaware limited liability company ("LAI Holdings"), and (xii) LFCM Holdings LLC, a Delaware limited liability company (all of such entities are collectively referred to as the "Reporting Persons"). As a result of the 10 Reporting Person per joint filing limitation of the electronic system, this Form 4 is being filed in duplicate (10 Reporting Persons have filed on this Form 4 and 2 Reporting Persons have filed on a duplicate Form 4).
(3) On May 12, 2011, Prometheus, LSHP, and LSHP Coinvest transferred 76,791, 24,901 and 5,211 shares of common stock, par value $0.25 per share, (the "Common Stock") of Ventas, Inc., a Delaware corporation (the "Issuer"), respectively, at $55.54 per share to Atria Senior Living, Inc., a Delaware corporation ("ASLI") and wholly-owned subsidiary of the Funds, to facilitate certain incentive compensation arrangements ASLI is making available to its employees pursuant to which such employees acquire such shares. Prometheus, LSHP and LSHP Coinvest retained voting and dispositive power over such shares of Common Stock until such time as they are disposed of by ASLI. Effective as of May 12, 2011, ASLI sold 42,949 of such shares and awarded 61,534 of such shares to certain employees of ASLI in connection with its incentive compensation arrangements, following approval by each of the Funds.
(4) Following the transfers described above, Prometheus, LSHP and LSHP Coinvest are the holders of record of 17,851,355, 5,788,817 and 1,211,468 shares of Common Stock, respectively.
(5) The shares of Common Stock held by ASLI may be deemed to be beneficially owned by the Funds. The shares of Common Stock beneficially owned by Prometheus may be deemed to be beneficially owned by each of LFSRI II-CADIM Alternative Partnership L.P., LF Strategic Realty Investors II L.P. and LFSRI II Alternative Partnership L.P., as its Managing Members, and by LFREI, as their general partner. The shares of Common Stock beneficially owned by LSHP may be deemed to be beneficially owned by LSHP GP, as its general partner.
(6) [continued from Footnote 5] LAI (as the Managing Member of each of LFREI, LSHP GP and LSHP Coinvest GP), LAI Holdings (as the parent of LAI), and LFCM Holdings LLC (as the parent of Lazard Alternative Investments Holdings LLC and the ultimate parent of LAI) may be deemed to beneficially own the shares of Common Stock beneficially owned by the Funds. Each of the Reporting Persons expressly disclaims beneficial ownership of the shares of Common Stock reported herein, except to the extent of its pecuniary interest therein, if any.

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