FORM 3

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 INITIAL STATEMENT OF 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

OMB APPROVAL OMB Number: 3235-0104 Expires: January 31, 2005 Estimated average burden hours per response... 0.5

(Print or Type Responses)

1. Name and Address of Reporting Person *   Sun Life Assurance CO of Canada 2. Date of Event Requiring Statement (Month/Day/Year) 03/03/2011 3. Issuer Name and Ticker or Trading Symbol KAYNE ANDERSON MIDSTREAM/ENERGY FUND, INC. [KMF] (Last) (First) (Middle) 150 KING STREET WEST,  4. Relationship of Reporting Person(s) to Issuer (Check all applicable) _____ Director __X__ 10% Owner _____ Officer (give title below) _____ Other (specify below) 5. If Amendment, Date Original Filed(Month/Day/Year) (Street) TORONTO, A6 M5H 1J9 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 Beneficially Owned

1.Title of Security (Instr. 4) 2. Amount of Securities Beneficially Owned (Instr. 4) 3. Ownership Form: Direct (D) or Indirect (I) (Instr. 5) 4. Nature of Indirect Beneficial Ownership (Instr. 5) Series A Mandatory Redeemable Preferred Shares 560,000 D   Series A Mandatory Redeemable Preferred Shares 600,000 I See below. Series A Mandatory Redeemable Preferred Shares 40,000 D (1) Â

Reminder: Report on a separate line for each class of securities beneficially owned directly or indirectly.			SEC 1473 (7-02)
	Persons who respond to the collection of information contained in this form are not required to respond unless the form displays a currently valid OMB control number.

Table II - Derivative Securities Beneficially Owned (e.g., puts, calls, warrants, options, convertible securities)

1. Title of Derivative Security (Instr. 4)	2. Date Exercisable and Expiration Date (Month/Day/Year)		3. Title and Amount of Securities Underlying Derivative Security (Instr. 4)		4. Conversion or Exercise Price of Derivative Security	5. Ownership Form of Derivative Security: Direct (D) or Indirect (I) (Instr. 5)	6. Nature of Indirect Beneficial Ownership (Instr. 5)
	Date Exercisable	Expiration Date	Title	Amount or Number of Shares

Reporting Owners

Reporting Owner Name / Address	Relationships
	Director	10% Owner	Officer	Other
Sun Life Assurance CO of Canada 150 KING STREET WEST TORONTO, A6 M5H 1J9	Â	  X	Â	Â
SUN LIFE FINANCIAL INC SUN LIFE ASSURANCE CO OF CANADA 150 KING STREET WEST SUITE 1400 TORONTO, A6Â	Â	  X	Â	Â
SUN LIFE ASSURANCE CO OF CANADA US ONE SUN LIFE EXECUTIVE PARK, SC 2335 WELLESLEY HILLS, MA 02481	Â	  X	Â	Â

Signatures

/s/ John T. Donnelly, Senior Managing Director, Investment Products and Strategies on behalf of Sun Life Assurance Company of Canada and Sun Life Assurance Company of Canada (U.S.)		03/08/2011
**Signature of Reporting Person		Date
/s/ Ann King, Assistant Vice President and Senior Counsel		03/08/2011
**Signature of Reporting Person		Date

Explanation of Responses:

*	If the form is filed by more than one reporting person, see Instruction 5(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)	Direct ownership held by Sun Life Assurance Company of Canada (U.S.), an affiliate of Sun Life Assurance Company of Canada.
  Remarks: Sun Life Financial Inc. owns 100% of the outstanding shares of common stock of Sun Life Assurance Company of Canada, the direct owner of 560,000 of the Series A Mandatory Redeemable Preferred Shares of Kayne Anderson Midstream/Energy Fund, Inc. and indirectly, through a series of holding companies, owns 100% of the outstanding shares of common stock of Sun Life Assurance Company of Canada (U.S.), the direct owner of 40,000 of the Series A Manadatory Redeemable Preferred Shares of Kayne Anderson Midstream/Energy Fund, Inc.

Note: File three copies of this Form, one of which must be manually signed. If space is insufficient, See Instruction 6 for procedure.

Potential persons who are to respond to the collection of information contained in this form are not required to respond unless the form displays a currently valid OMB number.