Annexon CEO Love Douglas buys 26,065 shares

The reported $3.83 weighted average reflects multiple trades priced from $3.815 to $3.829 per share, inclusive.

Available on EDGAR 09/25/2026 - 04:29 PM EDT Accepted by SEC EDGAR 09/25/2026 - 04:15 PM EDT Learn about SEC filing dates

Rhea-AI Filing Summary

Annexon, Inc. President and CEO Love Douglas purchased 26,065 shares of common stock on September 24, 2026, at a reported weighted average price of $3.83 per share. After the purchase, Douglas directly held 390,476 shares. No Rule 10b5-1 plan is reported.

Insider Trade Summary

Net Buyer: 26,065 shares

Net Buy 1 txn

Insider Love Douglas

Role PRESIDENT AND CEO

Bought 26,065 shs ($100K)

Increase in Position 7.2%

Type	Security	Shares	Price	Value
Purchase	Common Stock F1, F2	26,065	$3.83	$100K

Holdings After Transaction: Common Stock — 390,476 shares (Direct)

Holdings Before and After: Common Stock, 364,411 to 390,476 shares (Direct)

Footnotes (2)

1. F1. This transaction was executed in multiple trades in prices ranging from $3.815 to $3.829, inclusive. The price reported in Column 4 above reflects the weighted average purchase 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 purchased at each respective price within the range set forth in this footnote.
2. F2. Includes 4,579 shares acquired on May 15, 2025 and 8,278 shares acquired on May 15, 2026, pursuant to the Issuer's Employee Stock Purchase Plan.

Key Figures

Shares purchased: 26,065 shares Weighted average purchase price: $3.83 per share Reported purchase price range: $3.815–$3.829 per share +1 more

4 metrics

Shares purchased 26,065 shares September 24, 2026

Weighted average purchase price $3.83 per share September 24, 2026 purchase

Reported purchase price range $3.815–$3.829 per share Multiple trades; inclusive

Direct shares held after purchase 390,476 shares Following the September 24, 2026 transaction

Key Terms

weighted average purchase price, Employee Stock Purchase Plan

2 terms

weighted average purchase price financial

"reflects the weighted average purchase price"

The weighted average purchase price is the average cost per share you paid across multiple buys, calculated so larger purchases count more than smaller ones. Imagine buying apples at different prices: the overall price you effectively paid depends on how many apples you bought at each price. Investors use it to measure true cost basis, calculate gains or losses, decide when to sell, and manage taxes and portfolio performance.

Employee Stock Purchase Plan financial

"pursuant to the Issuer's Employee Stock Purchase Plan"

An employee stock purchase plan is a company program that lets workers buy shares through small payroll deductions, often at a discount to the market price and after a set offering period. Think of it like a workplace savings plan that turns into ownership: it encourages employees to share in the company’s success and can create predictable buying or selling of stock that investors watch because it affects supply, demand and employee incentives.

FAQ

AI-generated questions and answers. How Rhea-AI works. Not financial advice.

How many ANNX shares did Love Douglas buy, and at what price?

Love Douglas purchased 26,065 shares of Annexon common stock on September 24, 2026, at a weighted average price of $3.83 per share. After the purchase, Douglas directly held 390,476 shares.

What prices did Love Douglas pay in the ANNX purchase?

The 26,065-share purchase was executed in multiple trades at prices ranging from $3.815 to $3.829 per share, inclusive; $3.83 was the reported weighted average purchase price.

AI-generated analysis. How Rhea-AI works. Not financial advice.

Form 4 Insider Transactions: What Each Field Means →

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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

OMB APPROVAL

OMB Number:			3235-0287
Estimated average burden
hours per response:			0.5

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^*

Love Douglas

(Last) (First) (Middle)

C/O ANNEXON, INC.

1400 SIERRA POINT PKWY, BLDG C, STE 200

(Street)

BRISBANE CALIFORNIA 94005

(City) (State) (Zip)

UNITED STATES

(Country)

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

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

X	Director		10% Owner
X	Officer (give title below)		Other (specify below)
	PRESIDENT AND CEO

2a. Foreign Trading Symbol

3. Date of Earliest Transaction (Month/Day/Year)
09/24/2026

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

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

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

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	09/24/2026		P		26,065	A	$3.83(1)	390,476(2)	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. This transaction was executed in multiple trades in prices ranging from $3.815 to $3.829, inclusive. The price reported in Column 4 above reflects the weighted average purchase 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 purchased at each respective price within the range set forth in this footnote.

2. Includes 4,579 shares acquired on May 15, 2025 and 8,278 shares acquired on May 15, 2026, pursuant to the Issuer's Employee Stock Purchase Plan.

	/s/ Jennifer Lew, Attorney-in-Fact	09/25/2026
	** 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.
* Form 4: SEC 1474 (03-26)