FORM 4 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 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(h) of the Investment Company Act of 1940

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1. Name and Address of Reporting Person * ABG Management Ltd   2. Issuer Name and Ticker or Trading Symbol Sorrento Therapeutics, Inc. [SRNE] 5. Relationship of Reporting Person(s) to Issuer (Check all applicable) _____ Director __X__ 10% Owner _____ Officer (give title below) _____ Other (specify below) (Last) (First) (Middle) UNIT 3002-3004, 30TH FLOOR,, GLOUCESTER TOWER, THE LANDMARK, CENTRAL 3. Date of Earliest Transaction (Month/Day/Year) 04/19/2017 (Street) HONG KONG, K3 00000 4. If Amendment, Date 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 (City) (State) (Zip) 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               1,397,853 I Through ABG II-SO Limited See footnote (1) (2) (3) (4) Common Stock 04/19/2017   P   550,000 A $ 2 1,991,441 I Through Ally Bridge LB Healthcare Master Fund Limited See footnote (1) (2) (3) (5) Common Stock               3,243,242 I Through ABG SRNE Limited See footnote (1) (2) (3) (6) Common Stock               1,500,000 I Through ABG Innovation-SO Limited See footnote (1) (2) (3) (7)

Reminder: Report on a separate line for each class of securities beneficially owned directly or indirectly.
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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 Underlying Securities (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

Warrants

$ 8.5

(8)

05/31/2019

Common Stock

432,432

432,432

I

Through Ally Bridge LB Healthcare Master Fund Limited See footnote (1) (2) (3) (5)

Warrants

$ 8.5

(8)

05/31/2019

Common Stock

432,432

432,432

I

Through ABG SRNE Limited See footnote (1) (2) (3) (6)

Warrants

$ 8.5

(9)

06/07/2019

Common Stock

540,540

540,540

I

Through ABG SRNE Limited See footnote (1) (2) (3) (6)

Reporting Owners

Reporting Owner Name / Address	Relationships
	Director	10% Owner	Officer	Other
ABG Management Ltd UNIT 3002-3004, 30TH FLOOR, GLOUCESTER TOWER, THE LANDMARK, CENTRAL HONG KONG, K3 00000		X
ABG SRNE Ltd UNIT 3002-3004, 30TH FLOOR, GLOUCESTER TOWER, THE LANDMARK, CENTRAL HONG KONG, K3 00000		X
Ally Bridge Group Capital Partners II, L.P. UNIT 3002-3004, 30TH FLOOR, GLOUCESTER TOWER, THE LANDMARK, CENTRAL HONG KONG, K3 00000		X
ABG II-SO Ltd UNIT 3002-3004, 30TH FLOOR, GLOUCESTER TOWER, THE LANDMARK, CENTRAL HONG KONG, K3 00000		X
Ally Bridge LB Healthcare Master Fund Ltd UNIT 3002-3004, 30TH FLOOR, GLOUCESTER TOWER, THE LANDMARK, CENTRAL HONG KONG, K3 00000		X
Ally Bridge LB Management Ltd UNIT 3002-3004, 30TH FLOOR, GLOUCESTER TOWER, THE LANDMARK, CENTRAL HONG KONG, K3 00000		X
Ally Bridge Group Innovation Capital Partners III, L.P. UNIT 3002-3004, 30TH FLOOR, GLOUCESTER TOWER, THE LANDMARK, CENTRAL HONG KONG, K3 00000		X
Yu Fan UNIT 3002-3004, 30TH FLOOR, GLOUCESTER TOWER, THE LANDMARK, CENTRAL HONG KONG, K3 00000		X
Li Bin UNIT 3002-3004, 30TH FLOOR, GLOUCESTER TOWER, THE LANDMARK, CENTRAL HONG KONG, K3 00000		X

Signatures

/s/ Yu Fan on behalf of himself and each other reporting person		04/21/2017
**Signature of Reporting Person		Date

Explanation of Responses:

*	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).
(1)	The Reporting Persons are making this joint, single filing because they may be deemed to constitute a "group" within the meaning of Section 13(d)(3) of the Securities Exchange Act 1934 as amended (the "Act").
(2)	The Form 4 is filed by and on behalf of each of the following persons (each a "Reporting Person"): (i) ABG II-SO Limited ("ABG II-SO"), a British Virgin Islands limited company, (ii) Ally Bridge Group Capital Partners II, L.P., a Cayman Islands limited partnership, (iii) Ally Bridge LB Healthcare Master Fund Limited ("ABG LB"), a Cayman Islands limited company, (iv) Ally Bridge LB Management Limited, a Cayman Islands limited company, (v) ABG SRNE Limited ("ABG SRNE"), a British Virgin Islands limited company, (vi) Ally Bridge Group Innovation Capital Partners III, L.P., a Cayman Islands limited company, (vii) ABG Management Ltd., a Cayman Islands limited partnership, (viii) Mr. Fan Yu, a director of ABG LB and a shareholder and director of Ally Bridge LB Management Limited, and the sole shareholder and director of ABG Management Ltd., and (ix) Mr. Bin Li, a director and executive officer of ABG LB and a shareholder and director of Ally Bridge LB Management Limited.
(3)	Each Reporting Person states that neither the filing of this statement nor anything herein shall be deemed an admission that such person is, for the purpose of Section 16 of the Act or otherwise, the beneficial owner of any securities covered by this statement. Each Reporting Person disclaims beneficial ownership of the securities covered by this statement, except to the extent of the pecuniary interest of such person in such securities.
(4)	ABG II-SO directly owns 1,397,853 shares of common stock of the Issuer. The following Reporting Persons may be deemed to beneficially own such securities: (i) Ally Bridge Group Capital Partners II, L.P., as parent of ABG II-SO, (ii) ABG Management Ltd., as manager of Ally Bridge Group Capital Partners II, L.P., and (iii) Mr. Fan Yu, as sole shareholder and director of ABG Management Ltd.
(5)	ABG LB directly owns (i) 1,991,441 shares of common stock of the Issuer and (ii) warrants to purchase 432,432 shares of common stock of the Issuer. The following Reporting Persons may be deemed to beneficially own such securities: (i) Ally Bridge LB Management Limited, as manager of ABG LB, (ii) Mr. Fan Yu, as a shareholder and director of Ally Bridge LB Management Limited, and (iii) Mr. Bin Li, as a shareholder and director of Ally Bridge LB Management Limited.
(6)	ABG SRNE directly owns (i) 3,243,242 shares of common stock of the Issuer and (ii) warrants to purchase 972,972 shares of common stock of the Issuer. The following Reporting Persons may be deemed to beneficially own such securities: (i) Ally Bridge Group Innovation Capital Partners III, L.P., as owner of the sole voting share of ABG SRNE, (ii) ABG Management Ltd., as manager of Ally Bridge Group Innovation Capital Partners III, L.P., and (iii) Mr. Fan Yu, as sole shareholder and director of ABG Management Ltd.
(7)	Ally Bridge Group Innovation Capital Partners III, L.P. is the owner of the sole voting share of ABG Innovation-SO Limited, a British Virgin Islands limited company, which directly owns 1,500,000 shares of common stock of the Issuer. The following Reporting Persons may be deemed to beneficially own such securities: (i) Ally Bridge Group Innovation Capital Partners III, L.P., (ii) ABG Management Ltd., as manager of Ally Bridge Group Innovation Capital Partners III, L.P., and (iii) Mr. Fan Yu, as sole shareholder and director of ABG Management Ltd.
(8)	The warrants are exercisable at any time on or after May 31, 2016.
(9)	The warrants are exercisable at any time on or after June 7, 2016.

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