Alector, Inc. (ALEC) officer discloses 4,753-share Rule 10b5-1 sale of common stock

Rhea-AI Filing Summary

Alector, Inc. principal accounting officer Grace Wong-Sarad reported selling 4,753 shares of Alector common stock on 12/05/2025 at a price of $1.21 per share. The transaction was made under a Rule 10b5-1 trading plan adopted by her on 09/05/2025.

After this sale, she directly beneficially owns 122,982 shares of Alector common stock.

Insider Trade Summary

Net Seller: 4,753 shares

Net Sell 1 txn

Insider Wong-Sarad Grace

Role Principal Accounting Officer

Sold 4,753 shs ($6K)

Type	Security	Shares	Price	Value
Sale	Common Stock	4,753	$1.21	$6K

Holdings After Transaction: Common Stock — 122,982 shares (Direct)

Footnotes (1)

1. F1. The sale reported in this Form 4 was effected pursuant to a Rule 10b5-1 trading plan adopted by the reporting person on September 5, 2025.

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Form 4 Insider Transactions: What Each Field Means →

Accepted by SEC EDGAR 12/08/2025 - 06:03 PM Learn about SEC filing dates

FAQ

What insider stock transaction did Alector (ALEC) report in this filing?

The filing reports that principal accounting officer Grace Wong-Sarad sold 4,753 shares of Alector common stock on 12/05/2025 at a price of $1.21 per share.

Who is the insider involved in the latest Alector (ALEC) transaction and what is her role?

The insider is Grace Wong-Sarad, who serves as an officer of Alector with the title Principal Accounting Officer.

How many Alector (ALEC) shares does the insider own after the reported sale?

Following the reported transaction, Grace Wong-Sarad directly beneficially owns 122,982 shares of Alector common stock.

Was the Alector (ALEC) insider sale made under a Rule 10b5-1 trading plan?

Yes. The sale was effected pursuant to a Rule 10b5-1 trading plan that the reporting person adopted on 09/05/2025.

When was the Rule 10b5-1 trading plan for the Alector (ALEC) insider adopted?

The Rule 10b5-1 trading plan under which the sale occurred was adopted on 09/05/2025 by Grace Wong-Sarad.

Is this Alector (ALEC) insider filing made by one reporting person or multiple persons?

The document indicates that the form is filed by one reporting person, not by a group of multiple reporting persons.

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^*

Wong-Sarad Grace

(Last) (First) (Middle)

C/O ALECTOR, INC.

131 OYSTER POINT BLVD., SUITE 600

(Street)

SOUTH SAN FRANCISCO CA 94080

(City) (State) (Zip)

2. Issuer Name and Ticker or Trading Symbol
Alector, Inc. [ ALEC ]

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

	Director		10% Owner
X	Officer (give title below)		Other (specify below)
	Principal Accounting Officer

3. Date of Earliest Transaction (Month/Day/Year)
12/05/2025

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	12/05/2025		S(1)		4,753	D	$1.21	122,982	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 sale reported in this Form 4 was effected pursuant to a Rule 10b5-1 trading plan adopted by the reporting person on September 5, 2025.

	/s/ Grace Wong-Sarad	12/08/2025
	** 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.