SEC Form SC 13G/A filed by Spero Therapeutics Inc. (Amendment)
UNITED STATES
SECURITIES AND EXCHANGE COMMISSION
Washington, D.C. 20549
SCHEDULE 13G
(Rule 13d-102)
INFORMATION TO BE INCLUDED IN STATEMENTS FILED PURSUANT
TO RULES 13d-1(b), (c), AND (d) AND AMENDMENTS THERETO FILED
PURSUANT TO RULE 13d-2(b)
(Amendment No. 5)1
|
Spero Therapeutics, Inc. |
|
(Name of Issuer) |
|
Common Stock, $0.001 par value per share |
|
(Title of Class of Securities) |
|
84833T103 |
|
(CUSIP Number) |
|
December 31, 2022 |
|
(Date of Event Which Requires Filing of this Statement) |
Check the appropriate box to designate the rule pursuant to which this Schedule is filed:
| ☐ | Rule 13d-1(b) |
| ☒ | Rule 13d-1(c) |
| ☐ | Rule 13d-1(d) |
1 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 disclosures provided in a prior cover page.
The information required on 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. 84833T103
| 1 | NAME OF REPORTING PERSON | ||||||||||||||||||
| Biotechnology Value Fund, L.P. | |||||||||||||||||||
| 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 | 5 | SOLE VOTING POWER | |||||||||||||||||
| SHARES | |||||||||||||||||||
| BENEFICIALLY | 0 | ||||||||||||||||||
| OWNED BY | 6 | SHARED VOTING POWER | |||||||||||||||||
| EACH | |||||||||||||||||||
| REPORTING | 0 | ||||||||||||||||||
| PERSON WITH | 7 | SOLE DISPOSITIVE POWER | |||||||||||||||||
| 0 | |||||||||||||||||||
| 8 | SHARED DISPOSITIVE POWER | ||||||||||||||||||
| 0 | |||||||||||||||||||
| 9 | AGGREGATE AMOUNT BENEFICIALLY OWNED BY EACH REPORTING PERSON | ||||||||||||||||||
| 0 | |||||||||||||||||||
| 10 | CHECK BOX IF THE AGGREGATE AMOUNT IN ROW (9) EXCLUDES CERTAIN SHARES | ☐ | |||||||||||||||||
| 11 | PERCENT OF CLASS REPRESENTED BY AMOUNT IN ROW (9) | ||||||||||||||||||
| 0% | |||||||||||||||||||
| 12 | TYPE OF REPORTING PERSON | ||||||||||||||||||
| PN | |||||||||||||||||||
| 2 |
CUSIP No. 84833T103
| 1 | NAME OF REPORTING PERSON | ||||||||||||||||||
| BVF I GP 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 | 5 | SOLE VOTING POWER | |||||||||||||||||
| SHARES | |||||||||||||||||||
| BENEFICIALLY | 0 | ||||||||||||||||||
| OWNED BY | 6 | SHARED VOTING POWER | |||||||||||||||||
| EACH | |||||||||||||||||||
| REPORTING | 0 | ||||||||||||||||||
| PERSON WITH | 7 | SOLE DISPOSITIVE POWER | |||||||||||||||||
| 0 | |||||||||||||||||||
| 8 | SHARED DISPOSITIVE POWER | ||||||||||||||||||
| 0 | |||||||||||||||||||
| 9 | AGGREGATE AMOUNT BENEFICIALLY OWNED BY EACH REPORTING PERSON | ||||||||||||||||||
| 0 | |||||||||||||||||||
| 10 | CHECK BOX IF THE AGGREGATE AMOUNT IN ROW (9) EXCLUDES CERTAIN SHARES | ☐ | |||||||||||||||||
| 11 | PERCENT OF CLASS REPRESENTED BY AMOUNT IN ROW (9) | ||||||||||||||||||
| 0% | |||||||||||||||||||
| 12 | TYPE OF REPORTING PERSON | ||||||||||||||||||
| OO | |||||||||||||||||||
| 3 |
CUSIP No. 84833T103
| 1 | NAME OF REPORTING PERSON | ||||||||||||||||||
| Biotechnology Value Fund II, L.P. | |||||||||||||||||||
| 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 | 5 | SOLE VOTING POWER | |||||||||||||||||
| SHARES | |||||||||||||||||||
| BENEFICIALLY | 0 | ||||||||||||||||||
| OWNED BY | 6 | SHARED VOTING POWER | |||||||||||||||||
| EACH | |||||||||||||||||||
| REPORTING | 0 | ||||||||||||||||||
| PERSON WITH | 7 | SOLE DISPOSITIVE POWER | |||||||||||||||||
| 0 | |||||||||||||||||||
| 8 | SHARED DISPOSITIVE POWER | ||||||||||||||||||
| 0 | |||||||||||||||||||
| 9 | AGGREGATE AMOUNT BENEFICIALLY OWNED BY EACH REPORTING PERSON | ||||||||||||||||||
| 0 | |||||||||||||||||||
| 10 | CHECK BOX IF THE AGGREGATE AMOUNT IN ROW (9) EXCLUDES CERTAIN SHARES | ☐ | |||||||||||||||||
| 11 | PERCENT OF CLASS REPRESENTED BY AMOUNT IN ROW (9) | ||||||||||||||||||
| 0% | |||||||||||||||||||
| 12 | TYPE OF REPORTING PERSON | ||||||||||||||||||
| PN | |||||||||||||||||||
| 4 |
CUSIP No. 84833T103
| 1 | NAME OF REPORTING PERSON | ||||||||||||||||||
| BVF II GP 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 | 5 | SOLE VOTING POWER | |||||||||||||||||
| SHARES | |||||||||||||||||||
| BENEFICIALLY | 0 | ||||||||||||||||||
| OWNED BY | 6 | SHARED VOTING POWER | |||||||||||||||||
| EACH | |||||||||||||||||||
| REPORTING | 0 | ||||||||||||||||||
| PERSON WITH | 7 | SOLE DISPOSITIVE POWER | |||||||||||||||||
| 0 | |||||||||||||||||||
| 8 | SHARED DISPOSITIVE POWER | ||||||||||||||||||
| 0 | |||||||||||||||||||
| 9 | AGGREGATE AMOUNT BENEFICIALLY OWNED BY EACH REPORTING PERSON | ||||||||||||||||||
| 0 | |||||||||||||||||||
| 10 | CHECK BOX IF THE AGGREGATE AMOUNT IN ROW (9) EXCLUDES CERTAIN SHARES | ☐ | |||||||||||||||||
| 11 | PERCENT OF CLASS REPRESENTED BY AMOUNT IN ROW (9) | ||||||||||||||||||
| 0% | |||||||||||||||||||
| 12 | TYPE OF REPORTING PERSON | ||||||||||||||||||
| OO | |||||||||||||||||||
| 5 |
CUSIP No. 84833T103
| 1 | NAME OF REPORTING PERSON | ||||||||||||||||||
| Biotechnology Value Trading Fund OS LP | |||||||||||||||||||
| 2 | CHECK THE APPROPRIATE BOX IF A MEMBER OF A GROUP | (a) ☒ | |||||||||||||||||
| (b) ☐ | |||||||||||||||||||
| 3 | SEC USE ONLY | ||||||||||||||||||
| 4 | CITIZENSHIP OR PLACE OF ORGANIZATION | ||||||||||||||||||
| Cayman Islands | |||||||||||||||||||
| NUMBER OF | 5 | SOLE VOTING POWER | |||||||||||||||||
| SHARES | |||||||||||||||||||
| BENEFICIALLY | 0 | ||||||||||||||||||
| OWNED BY | 6 | SHARED VOTING POWER | |||||||||||||||||
| EACH | |||||||||||||||||||
| REPORTING | 0 | ||||||||||||||||||
| PERSON WITH | 7 | SOLE DISPOSITIVE POWER | |||||||||||||||||
| 0 | |||||||||||||||||||
| 8 | SHARED DISPOSITIVE POWER | ||||||||||||||||||
| 0 | |||||||||||||||||||
| 9 | AGGREGATE AMOUNT BENEFICIALLY OWNED BY EACH REPORTING PERSON | ||||||||||||||||||
| 0 | |||||||||||||||||||
| 10 | CHECK BOX IF THE AGGREGATE AMOUNT IN ROW (9) EXCLUDES CERTAIN SHARES | ☐ | |||||||||||||||||
| 11 | PERCENT OF CLASS REPRESENTED BY AMOUNT IN ROW (9) | ||||||||||||||||||
| 0% | |||||||||||||||||||
| 12 | TYPE OF REPORTING PERSON | ||||||||||||||||||
| PN | |||||||||||||||||||
| 6 |
CUSIP No. 84833T103
| 1 | NAME OF REPORTING PERSON | ||||||||||||||||||
| BVF Partners OS Ltd. | |||||||||||||||||||
| 2 | CHECK THE APPROPRIATE BOX IF A MEMBER OF A GROUP | (a) ☒ | |||||||||||||||||
| (b) ☐ | |||||||||||||||||||
| 3 | SEC USE ONLY | ||||||||||||||||||
| 4 | CITIZENSHIP OR PLACE OF ORGANIZATION | ||||||||||||||||||
| Cayman Islands | |||||||||||||||||||
| NUMBER OF | 5 | SOLE VOTING POWER | |||||||||||||||||
| SHARES | |||||||||||||||||||
| BENEFICIALLY | 0 | ||||||||||||||||||
| OWNED BY | 6 | SHARED VOTING POWER | |||||||||||||||||
| EACH | |||||||||||||||||||
| REPORTING | 0 | ||||||||||||||||||
| PERSON WITH | 7 | SOLE DISPOSITIVE POWER | |||||||||||||||||
| 0 | |||||||||||||||||||
| 8 | SHARED DISPOSITIVE POWER | ||||||||||||||||||
| 0 | |||||||||||||||||||
| 9 | AGGREGATE AMOUNT BENEFICIALLY OWNED BY EACH REPORTING PERSON | ||||||||||||||||||
| 0 | |||||||||||||||||||
| 10 | CHECK BOX IF THE AGGREGATE AMOUNT IN ROW (9) EXCLUDES CERTAIN SHARES | ☐ | |||||||||||||||||
| 11 | PERCENT OF CLASS REPRESENTED BY AMOUNT IN ROW (9) | ||||||||||||||||||
| 0% | |||||||||||||||||||
| 12 | TYPE OF REPORTING PERSON | ||||||||||||||||||
| CO | |||||||||||||||||||
| 7 |
CUSIP No. 84833T103
| 1 | NAME OF REPORTING PERSON | ||||||||||||||||||
| BVF GP Holdings 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 | 5 | SOLE VOTING POWER | |||||||||||||||||
| SHARES | |||||||||||||||||||
| BENEFICIALLY | 0 | ||||||||||||||||||
| OWNED BY | 6 | SHARED VOTING POWER | |||||||||||||||||
| EACH | |||||||||||||||||||
| REPORTING | 0 | ||||||||||||||||||
| PERSON WITH | 7 | SOLE DISPOSITIVE POWER | |||||||||||||||||
| 0 | |||||||||||||||||||
| 8 | SHARED DISPOSITIVE POWER | ||||||||||||||||||
| 0 | |||||||||||||||||||
| 9 | AGGREGATE AMOUNT BENEFICIALLY OWNED BY EACH REPORTING PERSON | ||||||||||||||||||
| 0 | |||||||||||||||||||
| 10 | CHECK BOX IF THE AGGREGATE AMOUNT IN ROW (9) EXCLUDES CERTAIN SHARES | ☐ | |||||||||||||||||
| 11 | PERCENT OF CLASS REPRESENTED BY AMOUNT IN ROW (9) | ||||||||||||||||||
| 0% | |||||||||||||||||||
| 12 | TYPE OF REPORTING PERSON | ||||||||||||||||||
| OO | |||||||||||||||||||
| 8 |
CUSIP No. 84833T103
| 1 | NAME OF REPORTING PERSON | ||||||||||||||||||
| BVF Partners L.P. | |||||||||||||||||||
| 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 | 5 | SOLE VOTING POWER | |||||||||||||||||
| SHARES | |||||||||||||||||||
| BENEFICIALLY | 0 | ||||||||||||||||||
| OWNED BY | 6 | SHARED VOTING POWER | |||||||||||||||||
| EACH | |||||||||||||||||||
| REPORTING | 0 | ||||||||||||||||||
| PERSON WITH | 7 | SOLE DISPOSITIVE POWER | |||||||||||||||||
| 0 | |||||||||||||||||||
| 8 | SHARED DISPOSITIVE POWER | ||||||||||||||||||
| 0 | |||||||||||||||||||
| 9 | AGGREGATE AMOUNT BENEFICIALLY OWNED BY EACH REPORTING PERSON | ||||||||||||||||||
| 0 | |||||||||||||||||||
| 10 | CHECK BOX IF THE AGGREGATE AMOUNT IN ROW (9) EXCLUDES CERTAIN SHARES | ☐ | |||||||||||||||||
| 11 | PERCENT OF CLASS REPRESENTED BY AMOUNT IN ROW (9) | ||||||||||||||||||
| 0% | |||||||||||||||||||
| 12 | TYPE OF REPORTING PERSON | ||||||||||||||||||
| PN, IA | |||||||||||||||||||
| 9 |
CUSIP No. 84833T103
| 1 | NAME OF REPORTING PERSON | ||||||||||||||||||
| BVF Inc. | |||||||||||||||||||
| 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 | 5 | SOLE VOTING POWER | |||||||||||||||||
| SHARES | |||||||||||||||||||
| BENEFICIALLY | 0 | ||||||||||||||||||
| OWNED BY | 6 | SHARED VOTING POWER | |||||||||||||||||
| EACH | |||||||||||||||||||
| REPORTING | 0 | ||||||||||||||||||
| PERSON WITH | 7 | SOLE DISPOSITIVE POWER | |||||||||||||||||
| 0 | |||||||||||||||||||
| 8 | SHARED DISPOSITIVE POWER | ||||||||||||||||||
| 0 | |||||||||||||||||||
| 9 | AGGREGATE AMOUNT BENEFICIALLY OWNED BY EACH REPORTING PERSON | ||||||||||||||||||
| 0 | |||||||||||||||||||
| 10 | CHECK BOX IF THE AGGREGATE AMOUNT IN ROW (9) EXCLUDES CERTAIN SHARES | ☐ | |||||||||||||||||
| 11 | PERCENT OF CLASS REPRESENTED BY AMOUNT IN ROW (9) | ||||||||||||||||||
| 0% | |||||||||||||||||||
| 12 | TYPE OF REPORTING PERSON | ||||||||||||||||||
| CO | |||||||||||||||||||
| 10 |
CUSIP No. 84833T103
| 1 | NAME OF REPORTING PERSON | ||||||||||||||||||
| Mark N. Lampert | |||||||||||||||||||
| 2 | CHECK THE APPROPRIATE BOX IF A MEMBER OF A GROUP | (a) ☒ | |||||||||||||||||
| (b) ☐ | |||||||||||||||||||
| 3 | SEC USE ONLY | ||||||||||||||||||
| 4 | CITIZENSHIP OR PLACE OF ORGANIZATION | ||||||||||||||||||
| United States | |||||||||||||||||||
| NUMBER OF | 5 | SOLE VOTING POWER | |||||||||||||||||
| SHARES | |||||||||||||||||||
| BENEFICIALLY | 0 | ||||||||||||||||||
| OWNED BY | 6 | SHARED VOTING POWER | |||||||||||||||||
| EACH | |||||||||||||||||||
| REPORTING | 0 | ||||||||||||||||||
| PERSON WITH | 7 | SOLE DISPOSITIVE POWER | |||||||||||||||||
| 0 | |||||||||||||||||||
| 8 | SHARED DISPOSITIVE POWER | ||||||||||||||||||
| 0 | |||||||||||||||||||
| 9 | AGGREGATE AMOUNT BENEFICIALLY OWNED BY EACH REPORTING PERSON | ||||||||||||||||||
| 0 | |||||||||||||||||||
| 10 | CHECK BOX IF THE AGGREGATE AMOUNT IN ROW (9) EXCLUDES CERTAIN SHARES | ☐ | |||||||||||||||||
| 11 | PERCENT OF CLASS REPRESENTED BY AMOUNT IN ROW (9) | ||||||||||||||||||
| 0% | |||||||||||||||||||
| 12 | TYPE OF REPORTING PERSON | ||||||||||||||||||
| IN | |||||||||||||||||||
| 11 |
CUSIP No. 84833T103
| Item 1(a). | Name of Issuer: |
Spero Therapeutics, Inc., a Delaware corporation (the “Issuer”).
| Item 1(b). | Address of Issuer’s Principal Executive Offices: |
675 Massachusetts Avenue, 14th Floor
Cambridge, Massachusetts 02139
| Item 2(a). | Name of Person Filing |
| Item 2(b). | Address of Principal Business Office or, if None, Residence |
| Item 2(c). | Citizenship |
Biotechnology Value Fund, L.P. (“BVF”)
44 Montgomery St., 40th Floor
San Francisco, California 94104
Citizenship: Delaware
BVF I GP LLC (“BVF GP”)
44 Montgomery St., 40th Floor
San Francisco, California 94104
Citizenship: Delaware
Biotechnology Value Fund II, L.P. (“BVF2”)
44 Montgomery St., 40th Floor
San Francisco, California 94104
Citizenship: Delaware
BVF II GP LLC (“BVF2 GP”)
44 Montgomery St., 40th Floor
San Francisco, California 94104
Citizenship: Delaware
Biotechnology Value Trading Fund OS LP (“Trading Fund OS”)
PO Box 309 Ugland House
Grand Cayman, KY1-1104
Cayman Islands
Citizenship: Cayman Islands
BVF Partners OS Ltd. (“Partners OS”)
PO Box 309 Ugland House
Grand Cayman, KY1-1104
Cayman Islands
Citizenship: Cayman Islands
BVF GP Holdings LLC (“BVF GPH”)
44 Montgomery St., 40th Floor
San Francisco, California 94104
Citizenship: Delaware
BVF Partners L.P. (“Partners”)
44 Montgomery St., 40th Floor
San Francisco, California 94104
Citizenship: Delaware
| 12 |
CUSIP No. 84833T103
BVF Inc.
44 Montgomery St., 40th Floor
San Francisco, California 94104
Citizenship: Delaware
Mark N. Lampert (“Mr. Lampert”)
44 Montgomery St., 40th Floor
San Francisco, California 94104
Citizenship: United States
Each of the foregoing is referred to as a “Reporting Person” and collectively as the “Reporting Persons.”
| Item 2(d). | Title of Class of Securities: |
Common Stock, $0.001 par value per share (the “Shares”)
| Item 2(e). | CUSIP Number: |
84833T103
| Item 3. | If This Statement is Filed Pursuant to Rule 13d-1(b), or 13d-2(b) or (c), Check Whether the Person Filing is a: |
| /x/ | Not applicable. | ||
| (a) | / / | Broker or dealer registered under Section 15 of the Exchange Act. | |
| (b) | / / | Bank as defined in Section 3(a)(6) of the Exchange Act. | |
| (c) | / / | Insurance company as defined in Section 3(a)(19) of the Exchange Act. | |
| (d) | / / | Investment company registered under Section 8 of the Investment Company Act. | |
| (e) | / / | 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: ____ |
| 13 |
CUSIP No. 84833T103
| Item 4. | Ownership |
As of the close of business on December 31, 2022, the Reporting Persons no longer beneficially owned any securities of the Issuer.
| Item 5. | Ownership of Five Percent or Less of a Class. |
If this statement is being filed to report the fact that as of the date hereof the reporting person has ceased to be the beneficial owner of more than five percent of the class of securities, check the following [X].
| Item 6. | Ownership of More than Five Percent on Behalf of Another Person. |
Not Applicable.
| Item 7. | Identification and Classification of the Subsidiary That 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. |
See Exhibit 99.1 to Amendment No. 2 to the Schedule 13G filed with the Securities and Exchange Commission on February 18, 2020.
| Item 9. | Notice of Dissolution of Group. |
Not Applicable.
| Item 10. | Certifications. |
By signing below each of the undersigned certifies that, to the best of its knowledge and belief, the securities referred to above 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.
| 14 |
CUSIP No. 84833T103
SIGNATURE
After reasonable inquiry and to the best of his knowledge and belief, each of the undersigned certifies that the information set forth in this statement is true, complete and correct.
Dated: February 14, 2023
| BIOTECHNOLOGY VALUE FUND, L.P. | BIOTECHNOLOGY VALUE TRADING FUND OS LP | |||
| By: | BVF I GP LLC, its general partner | By: | BVF Partners L.P., its investment manager | |
| By: | BVF Inc., its general partner | |||
| By: |
/s/ Mark N. Lampert |
|||
| Mark N. Lampert | By: | /s/ Mark N. Lampert | ||
| Chief Executive Officer | Mark N. Lampert | |||
| President | ||||
| BVF I GP LLC | ||||
| BVF GP HOLDINGS LLC | ||||
| By: | /s/ Mark N. Lampert | |||
| Mark N. Lampert | By: | /s/ Mark N. Lampert | ||
| Chief Executive Officer | Mark N. Lampert | |||
| Chief Executive Officer | ||||
| BIOTECHNOLOGY VALUE FUND II, L.P. | ||||
| BVF PARTNERS L.P. | ||||
| By: | BVF II GP LLC, its general partner | |||
| By: | BVF Inc., its general partner | |||
| By: |
/s/ Mark N. Lampert |
|||
| Mark N. Lampert | By: | /s/ Mark N. Lampert | ||
| Chief Executive Officer | Mark N. Lampert | |||
| President | ||||
| BVF II GP LLC | ||||
| BVF INC. | ||||
| By: | /s/ Mark N. Lampert | |||
| Mark N. Lampert | By: | /s/ Mark N. Lampert | ||
| Chief Executive Officer | Mark N. Lampert | |||
| President | ||||
| BVF PARTNERS OS LTD. | ||||
| /s/ Mark N. Lampert | ||||
| By: | BVF Partners L.P., its sole member | MARK N. LAMPERT | ||
| By: | BVF Inc., its general partner | |||
| By: |
/s/ Mark N. Lampert |
|||
| Mark N. Lampert | ||||
| President | ||||
| 15 |