Abingworth LLP - Jan 28, 2022 Form 4 Insider Report for Sierra Oncology, Inc. (SRRA)

Role: 10%+ Owner
Signature: /s/ John Heard, as attorney-in-fact
Stock symbol: SRRA
Transactions as of: Jan 28, 2022
Transactions value $: $7,844,617
Form type: 4
Date filed: 2/1/2022, 04:00 PM
Previous filing: Nov 5, 2021
Next filing: Mar 23, 2022

Transactions Table

Type	Sym	Class	Transaction	Value $	Shares	Change %	* Price $	Shares After	Date	Ownership	Footnotes
transaction	SRRA	Common Stock, $0.001 par value	Exercise of in-the-money or at-the-money derivative security	$3.79M	+287K	+32.79%	$13.20	1.16M	Jan 28, 2022	See footnote	F1
transaction	SRRA	Common Stock, $0.001 par value	Purchase	$4.05M	+150K	+12.89%	$27.00	1.31M	Jan 31, 2022	See footnote	F1

Derivative Securities (e.g., puts, calls, warrants, options, convertible securities)

Type	Sym	Class	Transaction	Value $	Shares	Change %	* Price $	Shares After	Date	Underlying Class	Amount	Exercise Price	Ownership	Footnotes
transaction	SRRA	Series B Warrants (right to buy)	Exercise of in-the-money or at-the-money derivative security	$0	-287K	-100%	$0.00^*	0	Jan 28, 2022	Common Stock	287K	$13.20	See footnote	F1, F2

* An asterisk sign (*) next to the price indicates that the price is likely invalid.

Explanation of Responses:

Id	Content
F1	The securities of Sierra Oncology, Inc. (the "Issuer") are held by Abingworth Bioventures VII, LP ("ABV VII"). Abingworth Bioventures VII GP LP ("Abingworth GP") serves as the general partner of ABV VII. Abingworth General Partner VII LLP, serves as the general partner of Abingworth GP. ABV VII (acting by its general partner Abingworth GP, acting by its general partner Abingworth General Partner VII LLP) has delegated to Abingworth LLP, all investment and dispositive power over the securities held by ABV VII. Abingworth LLP holds the reported securities indirectly through ABV VII. Abingworth LLP disclaims beneficial ownership of such securities, except to the extent of its pecuniary interest therein. This report shall not be deemed an admission that the reporting person, ABV VII, Dr. Andrew Sinclair or any other person is the beneficial owner of the securities reported herein for purposes of Section 16 of the Securities Exchange Act of 1934, as amended, or for any other purpose.
F2	Each Series B warrant will expire on the 75th day anniversary of the Issuer's announcement of top-line data from its MOMENTUM Phase 3 clinical trial of momelotinib.

Content

The securities of Sierra Oncology, Inc. (the "Issuer") are held by Abingworth Bioventures VII, LP ("ABV VII"). Abingworth Bioventures VII GP LP ("Abingworth GP") serves as the general partner of ABV VII. Abingworth General Partner VII LLP, serves as the general partner of Abingworth GP. ABV VII (acting by its general partner Abingworth GP, acting by its general partner Abingworth General Partner VII LLP) has delegated to Abingworth LLP, all investment and dispositive power over the securities held by ABV VII. Abingworth LLP holds the reported securities indirectly through ABV VII. Abingworth LLP disclaims beneficial ownership of such securities, except to the extent of its pecuniary interest therein. This report shall not be deemed an admission that the reporting person, ABV VII, Dr. Andrew Sinclair or any other person is the beneficial owner of the securities reported herein for purposes of Section 16 of the Securities Exchange Act of 1934, as amended, or for any other purpose.

Each Series B warrant will expire on the 75th day anniversary of the Issuer's announcement of top-line data from its MOMENTUM Phase 3 clinical trial of momelotinib.