- Statement of Changes in Beneficial Ownership (4)

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	OMB APPROVAL OMB Number: 3235-0287 Expires: February 28, 2011 Estimated average burden hours per response... 0.5
	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(f) of the Investment Company Act of 1940

1. Name and Address of Reporting Person * Sweet David	2. Issuer Name and Ticker or Trading Symbol UNICA CORP [ UNCA ]	5. Relationship of Reporting Person(s) to Issuer (Check all applicable) _____ Director                      _____ 10% Owner __ X __ Officer (give title below)      _____ Other (specify below) Sr. VP Corporate Development
(Last)          (First)          (Middle) 170 TRACER LANE	3. Date of Earliest Transaction (MM/DD/YYYY) 10/5/2010
(Street) WALTHAM, MA 02451 (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	10/5/2010		D		17919	D	$21.00   (1)	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
Restricted Stock Units	(2)	10/5/2010		D			5000	(3) (4)	(5)	Common Stock	5000	(3) (4)	0	D
Restricted Stock Units	(2)	10/5/2010		D			5000	(3) (6)	(5)	Common Stock	5000	(3) (6)	0	D
Restricted Stock Units	(2)	10/5/2010		D			18750	(3) (7)	(5)	Common Stock	18750	(3) (7)	0	D
Restricted Stock Units	(2)	10/5/2010		D			20000	(3) (8)	(5)	Common Stock	20000	(3) (8)	0	D
Nonqualified Stock Option	$4.21	10/5/2010		D			10000	(9) (10)	12/11/2014	Common Stock	10000	(9) (10)	0	D
Nonqualified Stock Option	$4.84	10/5/2010		D			26666	(9) (11)	2/26/2015	Common Stock	26666	(9) (11)	0	D
Nonqualified Stock Option	$4.84	10/5/2010		D			46666	(9) (12)	2/26/2010	Common Stock	46666	(9) (12)	0	D
Nonqualified Stock Option	$4.84	10/5/2010		D			26666	(9) (11)	2/26/2015	Common Stock	26666	(9) (11)	0	D
Nonqualified Stock Option	$6.79	10/5/2010		D			20000	(9) (13)	12/3/2015	Common Stock	20000	(9) (13)	0	D

Explanation of Responses:
( 1)	Shares were disposed of pursuant to the merger agreement between the Issuer and International Business Machines Corporation ("IBM") in exchange for a cash payment of $21.00 per share on the effective date of the merger.
( 2)	Each restricted stock unit represents a contingent right to receive one share of Issuer common stock.
( 3)	Pursuant to the terms of the restricted stock unit award agreement and certain employment arrangements with IBM, 50% of the restricted stock units vested at the effective time of the merger. Each such restricted stock unit that vested at the effective time of the merger agreement was disposed of pursuant to the merger agreement in exchange for a cash payment of $21.00 per restricted stock unit. The remaining 50% of the restricted stock units were converted, pursuant to the merger agreement, into the right to receive a cash payment of $21.00 per restricted stock unit at the time that such restricted stock unit would have vested pursuant to its terms in effect as of immediately prior to the effective time of the merger.
( 4)	The remaining restricted stock units will vest as follows: 2,500 of the total number of restricted stock units in this grant on December 1, 2010 subject to the reporting person's continued service with IBM.
( 5)	These restricted stock units do not have an expiration date.
( 6)	The remaining restricted stock units will vest as follows: 1,250 of the total number of restricted stock units in this grant on December 1, 2010, and 1,250 of the total number of restricted stock units in this grant on December 1, 2011, subject to the reporting person's continued service with IBM.
( 7)	The remaining restricted stock units will vest as follows: 3,125 of the total number of restricted stock units in this grant on December 1, 2010, 3,125 of the total number of restricted stock units in this grant on December 1, 2011, and 3,125 of the total number of restricted stock units in this grant on December 1, 2012, subject to the reporting person's continued service with IBM.
( 8)	The remaining restricted stock units will vest as follows: 2,500 of the total number of restricted stock units in this grant on December 1, 2010, 2,500 of the total number of restricted stock units in this grant on December 1, 2011, 2,500 of the total number of restricted stock units in this grant on December 1, 2012, and 2,500 of the total number of restricted stock units in this grant on December 1, 2013, subject to the reporting person's continued service with IBM.
( 9)	Pursuant to the terms of the stock option agreement and certain employment arrangements with IBM, 50% of the unvested stock options vested at the effective time of the merger.
( 10)	This option was granted on December 11, 2008 and provided for vesting as to 12.5% of the underlying shares on June 1, 2009 and as to an additional 6.25% every three months thereafter. Pursuant to the terms of the merger agreement, option award agreement, and certain employment arrangements with IBM, this option was (i) with respect to 7,187 shares, cancelled in exchange for a cash payment equal to $120,669.73 before reduction for taxes, representing the difference between the exercise price of the option and $21.00 per share; and (ii) with respect to 2813 shares, pursuant to the merger agreement, was replaced with an option to acquire 449 shares of IBM common stock at an exercise price of $26.33.
( 11)	This option was granted on February 26, 2009 and provided for vesting as to 50.0% of the underlying shares on February 26, 2010 and as to an additional 12.5% every three months thereafter. Pursuant to the terms of the merger agreement, option award agreement, and certain employment arrangements with IBM, this option was (i) with respect to 23,333 shares, cancelled in exchange for a cash payment equal to $377,061.28 before reduction for taxes, representing the difference between the exercise price of the option and $21.00 per share; and (ii) with respect to 3,333 shares, pursuant to the merger agreement, was replaced with an option to acquire 533 shares of IBM common stock at an exercise price of $30.27.
( 12)	This option was granted on February 26, 2009 and provided for vesting as to 50.0% of the underlying shares on February 26, 2010 and as to an additional 12.5% every three months thereafter. Pursuant to the terms of the merger agreement, option award agreement, and certain employment arrangements with IBM, this option was (i) with respect to 40,833 shares, cancelled in exchange for a cash payment equal to $659,861.28 before reduction for taxes, representing the difference between the exercise price of the option and $21.00 per share; and (ii) with respect to 5,833 shares, pursuant to the merger agreement, was replaced with an option to acquire 932 shares of IBM common stock at an exercise price of $30.27.
( 13)	This option was granted on December 3, 2009 and provided for vesting as to 12.5% of the underlying shares on June 1, 2010 and as to an additional 6.25% every three months thereafter. Pursuant to the terms of the merger agreement, option award agreement, and certain employment arrangements with IBM, this option was (i) with respect to 11,875 shares, cancelled in exchange for a cash payment equal to $168,743.75 before reduction for taxes, representing the difference between the exercise price of the option and $21.00 per share; and (ii) with respect to 8,125 shares, pursuant to the merger agreement, was replaced with an option to acquire 1,299 shares of IBM common stock at an exercise price of $42.46.

Reporting Owners
Reporting Owner Name / Address	Relationships
	Director	10% Owner	Officer	Other
Sweet David 170 TRACER LANE WALTHAM, MA 02451			Sr. VP Corporate Development

Signatures
/s/ Jason W. Joseph, Vice President and General Counsel By Power of Attorney		10/7/2010
** Signature of Reporting Person		Date

Reminder: Report on a separate line for each class of securities beneficially owned directly or indirectly.
*	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).
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