| SECURITIES AND EXCHANGE COMMISSION | |
| Washington, D.C. 20549 | |
| SCHEDULE 13G | |
| Under the Securities Exchange Act of 1934 | |
| (Amendment No.)* | |
|
Mirati Therapeutics, Inc. | |
| (Name of Issuer) | |
|
Common stock, $0.001 par value | |
| (Title of Class of Securities) | |
|
60468T105 | |
| (CUSIP Number) | |
|
December 31, 2015 | |
| (Date of Event Which Requires Filing of This Statement) | |
| Check the appropriate box to designate the rule pursuant to which this Schedule is filed: | |
| þ | Rule 13d-1(b) |
| ¨ | Rule 13d-1(c) |
| ¨ | Rule 13d-1(d) |
| (Page 1 of 6 Pages) | |
______________________________
*The remainder of this cover page shall be filled out for a reporting person's initial filing on this form with respect to the subject class of securities, and for any subsequent amendment containing information which would alter the disclosures provided in a prior cover page.
The information required in the remainder of this cover page shall not be deemed to be "filed" for the purpose of Section 18 of the Securities Exchange Act of 1934 ("Act") or otherwise subject to the liabilities of that section of the Act but shall be subject to all other provisions of the Act (however, see the Notes).
CUSIP No. 60468T105 | 13G | Page 2 of 6 Pages |
| 1 |
NAME OF REPORTING PERSON venBio Select Advisor LLC | |||
| 2 | CHECK THE APPROPRIATE BOX IF A MEMBER OF A GROUP |
(a) ¨ (b) ¨ | ||
| 3 | SEC USE ONLY | |||
| 4 |
CITIZENSHIP OR PLACE OF ORGANIZATION Delaware | |||
| NUMBER OF SHARES BENEFICIALLY OWNED BY EACH REPORTING PERSON WITH: |
5 |
SOLE VOTING POWER 1,295,555 (including 37,500 shares issuable upon exercise of warrants) | ||
| 6 |
SHARED VOTING POWER 0 | |||
| 7 |
SOLE DISPOSITIVE POWER 1,295,555 (including 37,500 shares issuable upon exercise of warrants) | |||
| 8 |
SHARED DISPOSITIVE POWER 0 | |||
| 9 |
AGGREGATE AMOUNT BENEFICIALLY OWNED BY EACH REPORTING PERSON 1,295,555 (including 37,500 shares issuable upon exercise of warrants) | |||
| 10 | CHECK BOX IF THE AGGREGATE AMOUNT IN ROW (9) EXCLUDES CERTAIN SHARES | ¨ | ||
| 11 |
PERCENT OF CLASS REPRESENTED BY AMOUNT IN ROW (9) 6.7% | |||
| 12 |
TYPE OF REPORTING PERSON OO, IA | |||
CUSIP No. 60468T105 | 13G | Page 3 of 6 Pages |
| Item 1(a). | NAME OF ISSUER |
| Mirati Therapeutics, Inc. (the “Issuer”) |
| Item 1(b). | ADDRESS OF ISSUER'S PRINCIPAL EXECUTIVE OFFICES |
| 9393 Towne Centre Drive, Suite 200, San Diego, California 92121 |
| Item 2(a). | NAME OF PERSON FILING |
| venBio Select Advisor LLC, a Delaware limited liability company (“venBio”or the “Reporting Person”), provides investment advisory and management services and has acquired the securities of the Issuer solely for investment purposes on behalf of venBio Select Fund LLC, a Delaware limited liability company, venBio Select Fund Ltd., a Cayman Islands exempted company, and certain managed accounts. | |
| The filing of this statement should not be construed as an admission that the Reporting Person is, for purposes of Section 13 of the Act, the beneficial owner of the securities reported herein. |
| Item 2(b). | ADDRESS OF PRINCIPAL BUSINESS OFFICE OR, IF NONE, RESIDENCE |
| 1700 Owens Street, Suite 595, San Francisco, CA 94158 |
| Item 2(c). | CITIZENSHIP |
| venBio is a Delaware limited liability company |
| Item 2(d). | TITLE OF CLASS OF SECURITIES |
| Common stock, $0.001 par value |
| Item 2(e). | CUSIP NUMBER |
| 60468T105 |
| Item 3. | IF THIS STATEMENT IS FILED PURSUANT TO Rules 13d-1(b), OR 13d-2(b) OR (c), CHECK WHETHER THE PERSON FILING IS A: |
| (a) | ¨ | Broker or dealer registered under Section 15 of the Act; | |
| (b) | ¨ | Bank as defined in Section 3(a)(6) of the Act; | |
| (c) | ¨ | Insurance company as defined in Section 3(a)(19) of the Act; | |
| (d) | ¨ | Investment company registered under Section 8 of the Investment Company Act of 1940; |
CUSIP No. 60468T105 | 13G | Page 4 of 6 Pages |
| (e) | þ | An investment adviser in accordance with Rule 13d-1(b)(1)(ii)(E); | |
| (f) | ¨ |
An employee benefit plan or endowment fund in accordance with Rule 13d-1(b)(1)(ii)(F);
| |
| (g) | ¨ | A parent holding company or control person in accordance with Rule 13d-1(b)(1)(ii)(G);
| |
| (h) | ¨ |
A savings association as defined in Section 3(b) of the Federal Deposit Insurance Act;
| |
| (i) | ¨ |
A church plan that is excluded from the definition of an investment company under Section 3(c)(14) of the Investment Company Act;
| |
| (j) | ¨ | A non-U.S. institution in accordance with Rule 13d-1(b)(1)(ii)(J); | |
| (k) | ¨ | Group, in accordance with Rule 13d-1(b)(1)(ii)(K). |
| If filing as a non-U.S. institution in accordance with Rule 13d-1(b)(1)(ii)(J), please | |||
| specify the type of institution: | |||
| Item 4. | OWNERSHIP |
| The information required by Items 4(a) - (c) is set forth in Rows 5 - 11 of the cover page and is incorporated herein by reference. | |
| The percentage set forth in Row 11 of this Schedule 13G is calculated based upon 19,265,922 shares of common stock outstanding as of October 30, 2015, as reported in the Issuer's Form 10-Q for the quarterly period ended September 30, 2015. |
| Item 5. | OWNERSHIP OF FIVE PERCENT OR LESS OF A CLASS |
| Not applicable. |
| Item 6. | OWNERSHIP OF MORE THAN FIVE PERCENT ON BEHALF OF ANOTHER PERSON |
| See Item 2 above. |
| Item 7. | IDENTIFICATION AND CLASSIFICATION OF THE SUBSIDIARY WHICH ACQUIRED THE SECURITY BEING REPORTED ON BY THE PARENT HOLDING COMPANY OR CONTROL PERSON |
| Not applicable. |
| Item 8. | IDENTIFICATION AND CLASSIFICATION OF MEMBERS OF THE GROUP |
| Not applicable. |
CUSIP No. 60468T105 | 13G | Page 5 of 6 Pages |
| Item 9. | NOTICE OF DISSOLUTION OF GROUP |
| Not applicable. |
| Item 10. | CERTIFICATION |
| The Reporting Person hereby makes the following certification: | |
| By signing below the Reporting Person certifies that, to the best of his or its knowledge and belief, the securities referred to above were acquired and are held in the ordinary course of business and were not acquired and are not held for the purpose of or with the effect of changing or influencing the control of the issuer of the securities and were not acquired and are not held in connection with or as a participant in any transaction having that purpose or effect. | |
CUSIP No. 60468T105 | 13G | Page 6 of 6 Pages |
SIGNATURES
After reasonable inquiry and to the best of his or its knowledge and belief, each of the undersigned certifies that the information set forth in this statement is true, complete and correct.
DATE: February 12, 2016
| venBio Select Advisor LLC | ||
| /s/ Scott Epstein | ||
| Name: | Scott Epstein | |
| Title: | Chief Financial Officer | |
| & Chief Compliance Officer | ||