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Filing Details

Issuer

Cik	Name	Symbol	Sector (SIC)	IRS No
1656328	Sienna Biopharmaceuticals Inc.	SNNA	Pharmaceutical Preparations (2834)	273364627

Insiders

Cik	Name	Reported Address	Insider Title	Director	Officer	Large Shareholder	Other
1711461	Diane Stroehmann	C/O Sienna Biopharmaceuticals, Inc. 30699 Russell Ranch Road, Suite 140 Westlake Village CA 91362	See Remarks	No	Yes	No	No

Reported Non-Derivative Transactions

Sec. Name	Acquisiton - Disposition	Date	Amount	Price	Remaning Holdings	Equity Swap Involved	Form Type	Code	Nature of Ownership	Explanation
Common Stock	Acquisiton	2017-08-01	28,153	$0.00	117,724	No	4	C	Direct
Common Stock	Acquisiton	2017-08-01	7,000	$15.00	124,724	No	4	P	Direct

Equity Swap Involved	Form Type	Code	Nature of Ownership	Explanation
No	4	C	Direct
No	4	P	Direct

Reported Derivative Transactions

Sec. Name	Sec. Type	Acquisiton - Disposition	Date	Amount	Price	Amount - 2	Price - 2
Common Stock	Series A-3 Preferred Stock	Disposition	2017-08-01	28,153	$0.00	28,153	$0.00

Remaning Holdings	Exercise Date	Expiration Date	Equity Swap Involved	Transaction Form Type	Transaction Code	Nature of Ownership
0			No	4	C	Direct

Footnotes

The shares of the Issuer's Preferred Stock automatically converted into shares of the Issuer's Common Stock, for no additional consideration, on a 1:1 basis immediately prior to the consummation of the Issuer's initial public offering.
The Reporting Person purchased the shares of the Issuer's common stock in connection with the Issuer's initial public offering at the offering price of $15.00 per share.
The expiration date is not relevant to the conversion of these securities.