Annexon, Inc. — Director's Dealing 2021

Mar 29, 2021

SEC Form 4 — Statement of Changes in Beneficial Ownership

Issuer: Annexon, Inc. (ANNX)
CIK: 0001528115
Period of Report: 2021-03-25

Reporting Person: Yednock Ted (EVP & Chief Scientific Officer)

Non-Derivative Transactions

Date	Security	Code	Shares	Price	A/D	Holdings After	Ownership
2021-03-25	Common Stock	M	15000	$1.4096	Acquired	15000	Direct
2021-03-25	Common Stock	M	1175	$5.1098	Acquired	16175	Direct
2021-03-25	Common Stock	S	10258	$28.5392	Disposed	5917	Direct
2021-03-25	Common Stock	S	5680	$29.2102	Disposed	237	Direct
2021-03-25	Common Stock	S	237	$29.96	Disposed	0	Direct

Derivative Transactions

Date	Security	Exercise Price	Code	Shares	A/D	Expiration	Underlying	Ownership
2021-03-25	Stock Option (Right to Buy)	$1.4096	M	15000	Disposed	2025-01-22	Common Stock (15000)	Direct
2021-03-25	Stock Option (Right to Buy)	$5.1098	M	1175	Disposed	2029-01-22	Common Stock (1175)	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 $27.91 to $28.89, 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 $28.92 to $29.86, 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: The shares subject to the option vest are fully vested and exercisable.

F5: 1/48th of the shares subject to the option vest on each monthly anniversary measured from December 12, 2018 (the "Vesting Commencement Date"), such that 100% of the shares subject to the option will be fully vested and exercisable on the fourth anniversary of the Vesting Commencement Date.