1. Name and Address of Reporting Person*
C/O ARCH VENTURE PARTNERS |
8755 W. HIGGINS ROAD, SUITE 1025 |
(Street)
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2. Date of Event Requiring Statement
(Month/Day/Year) 07/26/2017
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3. Issuer Name and Ticker or Trading Symbol
Sienna Biopharmaceuticals, Inc.
[ SNNA ]
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4. Relationship of Reporting Person(s) to Issuer
(Check all applicable)
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Director |
X |
10% Owner |
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Officer (give title below) |
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Other (specify below) |
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5. If Amendment, Date of Original Filed
(Month/Day/Year) 07/26/2017
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6. Individual or Joint/Group Filing (Check Applicable Line)
X |
Form filed by One Reporting Person |
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Form filed by More than One Reporting Person |
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ARCH Venture Fund VIII, L.P. By: ARCH Venture Partners VIII, L.P. By: /s/Mark McDonnell, as Attorney-in-Fact for Keith Crandell, the Managing Director of ARCH Venture Partners VIII LLC, the GP of ARCH Venture Partners VIII, L.P., the GP of ARCH Venture Fu |
07/31/2017 |
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ARCH Venture Fund VIII Overage, L.P. By: ARCH Venture Partners VIII, LLC By: /s/ Mark McDonnell, as Attorney-in-Fact for Keith Crandell, the Managing Director of ARCH Venture Partners VIII LLC, the GP of ARCH Venture Fund VIII Overage, L.P. |
07/31/2017 |
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ARCH Venture Partners VIII, L.P. By: ARCH Venture Partners VIII, LLC By: /s/ Mark McDonnell as Attorney-in-Fact for Keith Crandell, the Managing Director of ARCH Venture Partners VIII, LLC, the GP of ARCH Venture Partners VIII, L.P. |
07/31/2017 |
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ARCH Venture Partners VIII, LLC By: /s/ Mark McDonnell as Attorney-in-Fact for Keith Crandell, the Managing Director of ARCH Venture Partners VIII, LLC |
07/31/2017 |
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/s/ Mark McDonnell, as Attorney-in-Fact for Keith Crandell |
07/31/2017 |
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/s/ Mark McDonnell, as Attorney-in-Fact for Clinton Bybee |
07/31/2017 |
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** 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. |