Annexon, Inc. — Director's Dealing 2020

Jul 28, 2020

SEC Form 4 — Statement of Changes in Beneficial Ownership

Issuer: Annexon, Inc. (ANNX)
CIK: 0001528115
Period of Report: 2020-07-28

Reporting Person: Satter Muneer A (Director)

Non-Derivative Transactions

Date	Security	Code	Shares	Price	A/D	Holdings After	Ownership
2020-07-28	Common Stock	C	1754978	—	Acquired	1754978	Indirect
2020-07-28	Common Stock	P	200000	$17.00	Acquired	1954978	Indirect

Derivative Transactions

Date	Security	Exercise Price	Code	Shares	A/D	Expiration	Underlying	Ownership
2020-07-28	Series A-1 Preferred Stock	$	C	3095238	Disposed		Common Stock (351331)	Indirect
2020-07-28	Series B Preferred Stock	$	C	4016573	Disposed		Common Stock (455909)	Indirect
2020-07-28	Series C Preferred Stock	$	C	5537036	Disposed		Common Stock (628494)	Indirect
2020-07-28	Series D Preferred Stock	$	C	2812543	Disposed		Common Stock (319244)	Indirect

Footnotes

F1: The shares of Series A-1, Series B, Series C and Series D Preferred Stock were automatically converted on a 1-for-8.81 basis into Common Stock immediately prior to the closing of the Issuer's initial public offering.

F2: The amount in Column 5 includes (a) 952,381 shares that are held by the Muneer A. Satter Revocable Trust for which the Reporting Person serves as trustee and, in such capacity, has sole voting and dispositive power over all such shares and (b) 2,142,857 shares that are held by various other trusts and other entities for which the Reporting Person serves as trustee, investment advisor or manager and, in such capacity, has sole voting and dispositive power over all such shares. The Reporting Person disclaims beneficial ownership of all shares included in clause (b) of this footnote (2), except to the extent of his pecuniary interest.

F3: The amount in Column 5 includes (a) 1,162,022 shares that are held by the Muneer A. Satter Revocable Trust for which the Reporting Person serves as trustee and, in such capacity, has sole voting and dispositive power over all such shares and (b) 2,854,551 shares that are held by various other trusts and other entities for which the Reporting Person serves as trustee, investment advisor or manager and, in such capacity, has sole voting and dispositive power over all such shares. The Reporting Person disclaims beneficial ownership of all shares included in clause (b) of this footnote (3), except to the extent of his pecuniary interest.

F4: Represents shares held by Satter Medical Technology Partners, L.P. ("SMTP"), for which the Reporting Person has sole voting and dispositive power over all such shares. The Reporting Person disclaims beneficial ownership of all shares included in this footnote (4), except to the extent of his pecuniary interest.

F5: The amount in Column 5 includes (a) 240,000 shares that are held by the Muneer A. Satter Revocable Trust for which the Reporting Person serves as trustee and, in such capacity, has sole voting and dispositive power over all such shares, (b) 567,240 shares that are held by various other trusts and other entities for which the Reporting Person serves as trustee, investment advisor or manager and, in such capacity, has sole voting and dispositive power over all such shares, and (c) 947,738 shares that are held by SMTP for which the Reporting Person has sole voting and dispositive power over all such shares. The Reporting Person disclaims beneficial ownership of all shares included in clauses (b) and (c) of this footnote (5), except to the extent of his pecuniary interest.

F6: Represents shares purchased by SMTP in connection with the Issuer's initial public offering. These shares of Common Stock were purchased at the public offering price of $17.00 per share.

F7: The amount in Column 5 includes (a) 240,000 shares that are held by the Muneer A. Satter Revocable Trust for which the Reporting Person serves as trustee and, in such capacity, has sole voting and dispositive power over all such shares, (b) 567,240 shares that are held by various other trusts and other entities for which the Reporting Person serves as trustee, investment advisor or manager and, in such capacity, has sole voting and dispositive power over all such shares, and (c) 1,147,738 shares that are held by SMTP for which the Reporting Person has sole voting and dispositive power over all such shares. The Reporting Person disclaims beneficial ownership of all shares included in clauses (b) and (c) of this footnote (7), except to the extent of his pecuniary interest.