Annexon, Inc. — Director's Dealing 2021

Mar 31, 2021

SEC Form 4 — Statement of Changes in Beneficial Ownership

Issuer: Annexon, Inc. (ANNX)
CIK: 0001528115
Period of Report: 2021-03-29

Reporting Person: Love Douglas (Director, President & CEO)

Non-Derivative Transactions

Date	Security	Code	Shares	Price	A/D	Holdings After	Ownership
2021-03-29	Common Stock	M	3750	$1.4096	Acquired	3750	Direct
2021-03-29	Common Stock	S	2850	$25.0216	Disposed	900	Direct
2021-03-29	Common Stock	S	600	$26.4184	Disposed	300	Direct
2021-03-29	Common Stock	S	300	$27.2383	Disposed	0	Direct
2021-03-30	Common Stock	M	3750	$1.4096	Acquired	3750	Direct
2021-03-30	Common Stock	S	1900	$24.2711	Disposed	1850	Direct
2021-03-30	Common Stock	S	1850	$24.7843	Disposed	0	Direct

Derivative Transactions

Date	Security	Exercise Price	Code	Shares	A/D	Expiration	Underlying	Ownership
2021-03-29	Stock Option (Right to Buy)	$1.4096	M	3750	Disposed	2025-01-22	Common Stock (3750)	Direct
2021-03-30	Stock Option (Right to Buy)	$1.4096	M	3750	Disposed	2025-01-22	Common Stock (3750)	Direct

Footnotes

F1: The transactions reported herein were effected pursuant to the Reporting Person's Rule 10b5-1 trading plan.

F2: This transaction was executed in multiple trades in prices ranging from $24.74 to $25.63, inclusive. The price reported in Column 4 above reflects the weighted average sale price. The Reporting Person hereby undertakes to provide to the Securities and Exchange Commission staff, the Issuer, or a security holder of the Issuer, upon request, full information regarding the number of shares sold at each respective price within the range set forth in this footnote.

F3: This transaction was executed in multiple trades in prices ranging from $26.02 to $27.00, inclusive. The price reported in Column 4 above reflects the weighted average sale price. The Reporting Person hereby undertakes to provide to the Securities and Exchange Commission staff, the Issuer, or a security holder of the Issuer, upon request, full information regarding the number of shares sold at each respective price within the range set forth in this footnote.

F4: This transaction was executed in multiple trades in prices ranging from $27.03 to $27.515, inclusive. The price reported in Column 4 above reflects the weighted average sale price. The Reporting Person hereby undertakes to provide to the Securities and Exchange Commission staff, the Issuer, or a security holder of the Issuer, upon request, full information regarding the number of shares sold at each respective price within the range set forth in this footnote.

F5: The shares subject to the option vest are fully vested and exercisable.

F6: This transaction was executed in multiple trades in prices ranging from $23.63 to $24.56, inclusive. The price reported in Column 4 above reflects the weighted average sale price. The Reporting Person hereby undertakes to provide to the Securities and Exchange Commission staff, the Issuer, or a security holder of the Issuer, upon request, full information regarding the number of shares sold at each respective price within the range set forth in this footnote.

F7: This transaction was executed in multiple trades in prices ranging from $24.63 to $25.00, inclusive. The price reported in Column 4 above reflects the weighted average sale price. The Reporting Person hereby undertakes to provide to the Securities and Exchange Commission staff, the Issuer, or a security holder of the Issuer, upon request, full information regarding the number of shares sold at each respective price within the range set forth in this footnote.