Annexon (ANNX) EVP sells 5,894 shares to cover RSU taxes

Rhea-AI Filing Summary

Annexon, Inc. executive vice president and chief scientific officer Dean Richard Artis sold 5,894 shares of common stock on March 2, 2026 in an open-market transaction to cover tax withholding obligations from vested restricted stock units. The weighted average sale price was $5.43 per share, and he held 180,093 shares afterward.

SEC Form 4

FORM 4

UNITED STATES SECURITIES AND EXCHANGE COMMISSION
Washington, D.C. 20549

STATEMENT OF CHANGES IN BENEFICIAL OWNERSHIP

Filed pursuant to Section 16(a) of the Securities Exchange Act of 1934
or Section 30(h) of the Investment Company Act of 1940

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Check this box if no longer subject to Section 16. Form 4 or Form 5 obligations may continue. See Instruction 1(b).

Check this box to indicate that a transaction was made pursuant to a contract, instruction or written plan for the purchase or sale of equity securities of the issuer that is intended to satisfy the affirmative defense conditions of Rule 10b5-1(c). See Instruction 10.

1. Name and Address of Reporting Person^*

ARTIS DEAN RICHARD

(Last) (First) (Middle)

C/O ANNEXON, INC.

1400 SIERRA POINT PKWY, BLDG C, STE 200

(Street)

BRISBANE CA 94005

(City) (State) (Zip)

2. Issuer Name and Ticker or Trading Symbol
Annexon, Inc. [ ANNX ]

5. Relationship of Reporting Person(s) to Issuer
(Check all applicable)

	Director		10% Owner
X	Officer (give title below)		Other (specify below)
	EVP & CHIEF SCIENTIFIC OFFICER

3. Date of Earliest Transaction (Month/Day/Year)
03/02/2026

4. If Amendment, Date of Original Filed (Month/Day/Year)

6. Individual or Joint/Group Filing (Check Applicable Line)

X	Form filed by One Reporting Person
	Form filed by More than One Reporting Person

Table I - Non-Derivative Securities Acquired, Disposed of, or Beneficially Owned
1. Title of Security (Instr. 3)	2. Transaction Date (Month/Day/Year)	2A. Deemed Execution Date, if any (Month/Day/Year)	3. Transaction Code (Instr. 8)		4. Securities Acquired (A) or Disposed Of (D) (Instr. 3, 4 and 5)			5. Amount of Securities Beneficially Owned Following Reported Transaction(s) (Instr. 3 and 4)	6. Ownership Form: Direct (D) or Indirect (I) (Instr. 4)	7. Nature of Indirect Beneficial Ownership (Instr. 4)
			Code	V	Amount	(A) or (D)	Price
Common Stock	03/02/2026		S(1)		5,894	D	$5.43(2)	180,093	D

Table II - Derivative Securities Acquired, Disposed of, or Beneficially Owned (e.g., puts, calls, warrants, options, convertible securities)
1. Title of Derivative Security (Instr. 3)	2. Conversion or Exercise Price of Derivative Security	3. Transaction Date (Month/Day/Year)	3A. Deemed Execution Date, if any (Month/Day/Year)	4. Transaction Code (Instr. 8)		5. Number of Derivative Securities Acquired (A) or Disposed of (D) (Instr. 3, 4 and 5)		6. Date Exercisable and Expiration Date (Month/Day/Year)		7. Title and Amount of Securities Underlying Derivative Security (Instr. 3 and 4)		8. Price of Derivative Security (Instr. 5)	9. Number of derivative Securities Beneficially Owned Following Reported Transaction(s) (Instr. 4)	10. Ownership Form: Direct (D) or Indirect (I) (Instr. 4)	11. Nature of Indirect Beneficial Ownership (Instr. 4)
				Code	V	(A)	(D)	Date Exercisable	Expiration Date	Title	Amount or Number of Shares

Explanation of Responses:

1. The shares were sold to cover tax withholding obligations in connection with the vesting of restricted stock units ("RSUs").

2. This transaction was executed in multiple trades in prices ranging from $5.35 to $5.56, 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.

	/s/ Jennifer Lew, Attorney-in-Fact	03/04/2026
	** Signature of Reporting Person	Date
Reminder: Report on a separate line for each class of securities beneficially owned directly or indirectly.
* If the form is filed by more than one reporting person, see Instruction 4 (b)(v).
** Intentional misstatements or omissions of facts constitute Federal Criminal Violations See 18 U.S.C. 1001 and 15 U.S.C. 78ff(a).
Note: File three copies of this Form, one of which must be manually signed. If space is insufficient, see Instruction 6 for procedure.
Persons who respond to the collection of information contained in this form are not required to respond unless the form displays a currently valid OMB Number.

FAQ

What did Annexon (ANNX) executive Dean Richard Artis report in this Form 4?

Dean Richard Artis reported selling 5,894 shares of Annexon common stock. The sale was executed to cover tax withholding obligations arising from the vesting of restricted stock units, and was conducted as an open-market transaction on March 2, 2026.

Why did Dean Richard Artis sell Annexon (ANNX) shares in this transaction?

The shares were sold to cover tax withholding obligations tied to vesting restricted stock units. This means the transaction was related to satisfying tax requirements on equity compensation rather than a discretionary portfolio trade by the executive.

How many Annexon (ANNX) shares did Dean Richard Artis sell and at what price?

He sold 5,894 shares of Annexon common stock at a weighted average price of $5.43 per share. The trades were executed in multiple transactions at prices ranging from $5.35 to $5.56, inclusive, according to the filing footnote.

How many Annexon (ANNX) shares does Dean Richard Artis own after this Form 4 sale?

After the reported sale, Dean Richard Artis directly owned 180,093 shares of Annexon common stock. This post-transaction share count reflects his holdings following the tax-related sale reported in the Form 4 filing.

What type of transaction did Annexon (ANNX) report for Dean Richard Artis?

The filing shows an open-market sale of common stock, coded as “S.” It is described as a sale to cover tax withholding obligations associated with the vesting of restricted stock units, rather than a standalone investment decision.

Over what price range were the Annexon (ANNX) shares sold in this Form 4?

The shares were sold in multiple trades at prices between $5.35 and $5.56 per share. The Form 4 reports a weighted average sale price of $5.43 and notes that detailed trade breakdowns are available upon request.