[Form 4] Alector, Inc. Insider Trading Activity

Rhea-AI Filing Summary

Sara Kenkare-Mitra, President and Head of R&D of Alector, Inc. (ALEC), reported a sale of common stock tied to RSU vesting. On 09/02/2025 she disposed of 23,638 shares at a weighted average price of $2.4968 per share; the filing explains the sale satisfied her tax obligations from vested restricted stock units. Following the reported transaction she beneficially owned 543,339 shares. The Form 4 was signed by Grace Wong-Sarad by power of attorney on 09/04/2025. The filing provides the price range for the multiple sale transactions as $2.30 to $2.59 and offers to furnish detailed per-transaction quantities on request.

Insights

Securities Analyst

TL;DR: Officer sold vested RSU shares to cover taxes; transaction is routine and disclosed under Section 16.

The Form 4 shows a non-derivative disposition of 23,638 shares on 09/02/2025 by an officer of ALEC to satisfy tax withholding from RSU vesting. The reported weighted average price was $2.4968 and the sales occurred across prices from $2.30 to $2.59. Post-transaction beneficial ownership is 543,339 shares. This is a standard compliance disclosure rather than an operational change; it provides transparency on insider liquidity events but contains no new financial performance data.

Corporate Governance Specialist

TL;DR: Proper Section 16 reporting of RSU-related sale; form includes explanatory note and POA signature.

The filing explicitly states the disposition was to satisfy tax obligations from vested RSUs and includes an explanation of the weighted-average price and price range. It is signed via power of attorney, meeting procedural requirements. From a governance perspective, the disclosure is complete for this event and does not indicate any undisclosed related-party or compensatory changes.

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^*

Kenkare-Mitra Sara

(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)
	President and Head of R&D

3. Date of Earliest Transaction (Month/Day/Year)
09/02/2025

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	09/02/2025		S(1)		23,638	D	$2.4968(2)	543,339	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 reported shares were sold to satisfy the reporting person's tax obligations in connection with the vesting of restricted stock units, or RSUs.

2. The price reported in Column 4 is a weighted average price. The shares were sold in multiple transactions at prices ranging from $2.30 to $2.59. Full information regarding the number of shares sold at each separate price can be furnished to the SEC staff, the issuer, or any security holder of the issuer upon request.

	/s/ Grace Wong-Sarad, by power of attorney	09/04/2025
	** 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.

FAQ

What did the Alector (ALEC) insider sell on 09/02/2025?

The reporting person sold 23,638 shares of Alector common stock on 09/02/2025.

Why were the ALEC shares sold by the reporting person?

The shares were sold to satisfy tax obligations arising from the vesting of restricted stock units (RSUs).

What price did the insider receive for the ALEC shares?

The weighted average price reported was $2.4968, with individual sale prices ranging from $2.30 to $2.59.

How many ALEC shares does the reporting person own after the sale?

Following the reported transaction the reporting person beneficially owned 543,339 shares.

Who signed the Form 4 for the reporting person?

The Form 4 was signed by Grace Wong-Sarad by power of attorney on 09/04/2025.