SEC FORM 3

SEC Form 3

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
or Section 30(h) of the Investment Company Act of 1940

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1. Name and Address of Reporting Person^*

Burke Paul Robert

(Last)

(First)

(Middle)

10250 CONSTELLATION BLVD.,

SUITE 1640

(Street)

LOS ANGELES

90067

(City)

(State)

(Zip)

2. Date of Event Requiring Statement (Month/Day/Year)
10/07/2015

3. Issuer Name and Ticker or Trading Symbol
PACWEST BANCORP [ PACW ]

4. Relationship of Reporting Person(s) to Issuer
(Check all applicable)

X	Director	10% Owner
	Officer (give title below)	Other (specify below)

5. If Amendment, Date of Original Filed (Month/Day/Year)

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 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)
Common Stock	3,226⁽¹⁾	D
Common Stock	60,434	I	By Northaven Partners II, L.P.⁽²⁾
Common Stock	21,411	I	By Northaven Partners III, L.P.⁽²⁾
Common Stock	407,837	I	By Northaven Capital Partners, L.P.⁽²⁾
Common Stock	34,428	I	by Northaven Offshore Ltd.⁽²⁾
Common Stock	344,378	I	By Northaven Partners, L.P.⁽²⁾

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: Direct (D) or Indirect (I) (Instr. 5)	6. Nature of Indirect Beneficial Ownership (Instr. 5)
1. Title of Derivative Security (Instr. 4)	Date Exercisable	Expiration Date	Title	Amount or Number of Shares	4. Conversion or Exercise Price of Derivative Security	5. Ownership Form: Direct (D) or Indirect (I) (Instr. 5)	6. Nature of Indirect Beneficial Ownership (Instr. 5)

Explanation of Responses:

1. In connection with the merger of Square 1 Financial, Inc. with and into PacWest Bancorp on October 6, 2015 pursuant to the Agreement and Plan of Merger, dated March 1, 2015, as amended, by and between PacWest and Square 1, the reporting person received (i) the PacWest common stock reported above and $43.34 in cash in exchange for 5,381 shares of Square 1 common stock, and (ii) $26,452.15 in cash in exchange for 1,031 restricted shares of Square 1 which were scheduled to vest on February 3, 2016. On October 6, 2015, the effective date of the merger, the closing price of Square 1's common stock was $26.32 per share and the closing price of PacWest's common stock was $43.97 per share.

2. Reporting person serves as a shareholder in Northaven Management, Inc., and is a member of Northaven Associates, LLC, the general partner of each of Northaven Partners, L.P., Northaven Partners II, L.P., Northaven Partners III, L.P., and Northaven Capital Partners, L.P., and the holder of the management shares of Northaven Offshore Ltd. As such, reporting person may be deemed to have beneficial ownership of the securities owned by these entities. Reporting person disclaims beneficial ownership of the reported securities except to the extent of his pecuniary interest therein, and this report shall not be deemed an admission that he is a beneficial owner of such securities for the purposes of Section 16.

	/s/ Paul Burke	10/08/2015
	** 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 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).
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