SEC Form 4

FORM 4		UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 STATEMENT OF CHANGES IN BENEFICIAL OWNERSHIP Filed pursuant to Section 16(a) of the Securities Exchange Act of 1934 or Section 30(h) of the Investment Company Act of 1940	OMB APPROVAL OMB Number: 3235-0287 Estimated average burden hours per response: 0.5
X	Check this box if no longer subject to Section 16. Form 4 or Form 5 obligations may continue. See Instruction 1(b).

1. Name and Address of Reporting Person* Silver Lake Sumeru Fund LP (Last) (First) (Middle) 2775 SAND HILL ROAD SUITE 100 (Street) MENLO PARK CA 94025 (City) (State) (Zip)	2. Issuer Name and Ticker or Trading Symbol POWER ONE INC [ PWER ]	5. Relationship of Reporting Person(s) to Issuer (Check all applicable) X Director X 10% Owner Officer (give title below) Other (specify below)
	3. Date of Earliest Transaction (Month/Day/Year) 07/25/2013
	4. If Amendment, Date of 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

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, par value $0.001 per share(1)(2)(3)	07/25/2013		J		25,775,108	D	$6.35(4)	0	D(5)
Common Stock, par value $0.001 per share(1)(2)(3)	07/25/2013		J		212,299	D	$6.35(4)	0	I	See Footnote(6)

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 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: 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
Series C Jr Convert Pref Stock, par value $0.001 per share(1)(2)(3)	$1.35	07/25/2013		J			24,713.6042	11/10/2011	(7)	Common Stock, par value $0.001 per share	18,306,373	$4,703.7(8)	0	D(5)
Series C Jr Convert Pref Stock, par value $0.001 per share(1)(2)(3)	$1.35	07/25/2013		J			203.3964	11/10/2011	(7)	Common Stock, par value $0.001 per share	150,664	$4,703.7(8)	0	I	See Footnote(6)
Warrant (right to buy Common Stock)(1)(2)(3)	$1.33	07/25/2013		J			8,628,941	08/08/2010	05/08/2016	Common Stock, par value $0.001 per share	8,628,941	$5.02(9)	0	D(5)
Warrant (right to buy Common Stock)(1)(2)(3)	$1.33	07/25/2013		J			71,059	08/08/2010	05/08/2016	Common Stock, par value $0.001 per share	71,059	$5.02(10)	0	I	See Footnote(6)

1. Name and Address of Reporting Person* Silver Lake Sumeru Fund LP (Last) (First) (Middle) 2775 SAND HILL ROAD SUITE 100 (Street) MENLO PARK CA 94025 (City) (State) (Zip) Relationship of Reporting Person(s) to Issuer X Director X 10% Owner Officer (give title below) Other (specify below)

1. Name and Address of Reporting Person* Silver Lake Technology Investors Sumeru, L.P. (Last) (First) (Middle) 2775 SAND HILL ROAD SUITE 100 (Street) MENLO PARK CA 94025 (City) (State) (Zip) Relationship of Reporting Person(s) to Issuer Director X 10% Owner Officer (give title below) Other (specify below)

1. Name and Address of Reporting Person* Silver Lake Technology Associates Sumeru, L.P. (Last) (First) (Middle) 2775 SAND HILL ROAD SUITE 100 (Street) MENLO PARK CA 94025 (City) (State) (Zip) Relationship of Reporting Person(s) to Issuer Director X 10% Owner Officer (give title below) Other (specify below)

1. Name and Address of Reporting Person* SLTA Sumeru (GP), L.L.C. (Last) (First) (Middle) 2775 SAND HILL ROAD SUITE 100 (Street) MENLO PARK CA 94025 (City) (State) (Zip) Relationship of Reporting Person(s) to Issuer Director X 10% Owner Officer (give title below) Other (specify below)

Explanation of Responses:

1. This Form 4 is filed on behalf of Silver Lake Sumeru Fund, L.P. ("SLSF"), Silver Lake Technology Investors Sumeru, L.P. ("SLTI"), Silver Lake Technology Associates Sumeru, L.P. ("SLT LP") and SLTA Sumeru (GP), L.L.C. ("SLTA"). SLT LP is the sole general partner of SLSF and SLTI. SLTA is the sole general partner of SLT LP. SLSF may be deemed to be a director by deputization of the Issuer.

2. As the sole general partner of SLSF and SLTI, SLT LP may be deemed to be the indirect beneficial owner of the securities directly owned by SLSF and SLTI under Rule 16a-1(a)(2) promulgated under the Securities Exchange Act of 1934, as amended (the "Exchange Act"). However, pursuant to Rule 16a-1(a)(4) promulgated under the Exchange Act, SLT LP disclaims beneficial ownership of such securities, except to the extent of its pecuniary interest.

3. As the sole general partner of SLT LP, SLTA may be deemed to be the indirect beneficial owner of such securities under Rule 16a-1(a)(2) promulgated under the Exchange Act. However, pursuant to Rule 16a-1(a)(4) promulgated under the Exchange Act, SLTA disclaims beneficial ownership of such securities, except to the extent of its pecuniary interest.

4. Each share of common stock, par value $0.001 per share (the "Common Stock"), of Power-One, Inc. (the "Issuer") was disposed of upon consummation of the merger (the "Merger") contemplated by that certain Agreement and Plan of Merger by and among ABB Ltd, Verdi Acquisition Corporation ("Verdi"), and the Issuer, dated April 21, 2013 (the "Merger Agreement") for the right to receive $6.35 in cash without interest. Pursuant to the Merger Agreement, the Issuer merged with and into Verdi, with the Issuer continuing as the surviving entity and becoming a subsidiary of ABB Ltd.

5. These securities are directly owned by SLSF. SLT LP and SLTA may be deemed to have indirect beneficial ownership of these securities. See Footnotes 2 and 3.

6. These securities are directly owned by SLTI. SLT LP and SLTA may be deemed to have indirect beneficial ownership of these securities. See Footnotes 2 and 3.

7. The Series C Junior Convertible Preferred Stock, par value $0.001 per share, of the Issuer (the "Series C Preferred Stock") has no expiration date.

8. Each share of Series C Preferred Stock was disposed of upon consummation of the Merger for the right to receive approximately $4,703.70 in cash per share without interest.

9. This warrant was disposed of upon consummation of the Merger for the right to receive $43,317,283.82 in cash, representing the product of (i) the excess of $6.35 over the exercise price per share of such warrant and (ii) the number of shares of Common Stock underlying such warrant.

10. This warrant was disposed of upon consummation of the Merger for the right to receive $356,716.18 in cash, representing the product of (i) the excess of $6.35 over the exercise price per share of such warrant and (ii) the number of shares of Common Stock underlying such warrant.

	/s/ Kyle T. Ryland, Managing Director of SLTA Sumeru (GP), L.L.C., general partner of Silver Lake Technology Associates Sumeru, L.P., general partner of Silver Lake Sumeru Fund, L.P. (see sign. of other Reporting Persons on the attached Exhibit 99.1).	07/26/2013
	** 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).
Note: File three copies of this Form, one of which must be manually signed. If space is insufficient, see Instruction 6 for procedure.
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 Number.