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^*

Erwin Judith E

(Last)

(First)

(Middle)

406 BLACKWELL STREET

SUITE 240

(Street)

DURHAM

27701

(City)

(State)

(Zip)

2. Date of Event Requiring Statement (Month/Day/Year)
03/24/2014

3. Issuer Name and Ticker or Trading Symbol
Square 1 Financial Inc [ SQBK ]

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

	Director	10% Owner
X	Officer (give title below)	Other (specify below)
	EVP-Venture Capital Services

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)
Class A Common Stock	13,022	D
Class A Common Stock	10,850	I	By IRA
Class A Common Stock	12,000	I	Restricted Stock IV⁽¹⁾
Class A Common Stock	2,035	I	Restricted Stock VI⁽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)
Stock Option (Right to Buy)	⁽³⁾	08/02/2017	Class A Common Stock	90,000	$6	D
Trust Preferred Securities	09/30/2008	09/30/2038	Class A Common Stock	40	$10⁽⁴⁾	D

Explanation of Responses:

1. Restricted stock vests in three equal annual installments, beginning on November 15, 2014, the first anniversary of the date of the award.

2. Restricted stock vests in two equal annual installments, beginning on March 1, 2015.

3. Stock options vest in five equal annual installments, beginning on August 2, 2011, the first anniversary of the date of the grant.

4. Represents the conversion price for each share of underlying Class A common stock to be issued upon conversion of the Trust Preferred Securities.

Remarks:

erwin-poa.txt

	/s/ Judith E. Erwin	03/31/2014
	** 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).
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.