Tang Capital Partners Form 4 LA JOLLA PHARMACEUTICAL / KEVIN C TANG ownership change

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

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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^*

TANG KEVIN C

(Last) (First) (Middle)

4747 EXECUTIVE DRIVE, SUITE 510

(Street)

SAN DIEGO CA 92121

(City) (State) (Zip)

2. Issuer Name and Ticker or Trading Symbol
LA JOLLA PHARMACEUTICAL CO [ LJPC ]

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)
05/11/2015

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	05/11/2015		P		98,700	A	$18.04	2,200,247	I(1)	By LP(1)
Common Stock	05/12/2015		P		44,400	A	$18.2514	2,244,647	I(1)	By LP(1)
Common Stock	05/13/2015		P		47,483	A	$18.6284	2,292,130	I(1)	By LP(1)

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

1. Name and Address of Reporting Person^*

TANG KEVIN C

(Last) (First) (Middle)

4747 EXECUTIVE DRIVE, SUITE 510

(Street)

SAN DIEGO CA 92121

(City) (State) (Zip)

1. Name and Address of Reporting Person^*

TANG CAPITAL PARTNERS LP

(Last) (First) (Middle)

4747 EXECUTIVE DRIVE, SUITE 510

(Street)

SAN DIEGO CA 92121

(City) (State) (Zip)

1. Name and Address of Reporting Person^*

TANG CAPITAL MANAGEMENT LLC

(Last) (First) (Middle)

4747 EXECUTIVE DRIVE, SUITE 510

(Street)

SAN DIEGO CA 92121

(City) (State) (Zip)

Explanation of Responses:

1. The securities are beneficially owned by Tang Capital Partners, LP ("TCP"). Kevin C. Tang is the sole manager of Tang Capital Management, LLC, which is the general partner of TCP. Mr. Tang disclaims beneficial ownership of the securities, except to the extent of his pecuniary interest therein.

Remarks:

	/s/ Kevin C. Tang	05/13/2015
	/s/ Kevin C. Tang, Managing Member of Tang Capital Management, LLC, General Partner	05/13/2015
	/s/ Kevin C. Tang, Managing Member	05/13/2015
	** 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 4 (b)(v).
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