Alector (ALEC) accounting chief sells 4,079 shares via 10b5-1 plan

Rhea-AI Filing Summary

Alector, Inc. Principal Accounting Officer Grace Wong-Sarad sold 4,079 shares of common stock in an open-market transaction at a price of $2.50 per share. Following this sale, she directly owns 118,903 shares of Alector common stock.

The filing notes that this sale was effected under a pre-arranged Rule 10b5-1 trading plan adopted by the reporting person on September 5, 2025, which is designed to systematically execute trades over time.

Insider Trade Summary

Net Seller: 4,079 shares ($10,198)

Net Sell 1 txn

Insider Wong-Sarad Grace

Role Principal Accounting Officer

Sold 4,079 shs ($10K)

Type	Security	Shares	Price	Value
Sale	Common Stock	4,079	$2.50	$10K

Holdings After Transaction: Common Stock — 118,903 shares (Direct)

Footnotes (1)

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Form 4 Insider Transactions: What Each Field Means →

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).

X

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)
02/26/2026

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	02/26/2026		S(1)		4,079	D	$2.5	118,903	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 sales reported in this Form 4 were effected pursuant to a Rule 10b5-1 Trading Plan adopted by the reporting person on September 5, 2025.

	/s/Grace Wong-Sarad	02/26/2026
	** 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 insider transaction did Alector (ALEC) report in this Form 4?

Alector (ALEC) reported that Principal Accounting Officer Grace Wong-Sarad sold 4,079 shares of common stock at $2.50 per share. The transaction was an open-market sale and is detailed as a non-derivative disposition of Alector common stock.

How many Alector (ALEC) shares does Grace Wong-Sarad own after the sale?

After the reported sale, Grace Wong-Sarad directly owns 118,903 shares of Alector (ALEC) common stock. This post-transaction holding reflects her remaining direct ownership following the 4,079-share open-market sale disclosed in the Form 4 filing.

At what price were the Alector (ALEC) shares sold in this insider trade?

The Alector (ALEC) shares were sold at a price of $2.50 per share. Principal Accounting Officer Grace Wong-Sarad executed an open-market transaction for 4,079 shares at this price, as disclosed in the Form 4 insider trading report.

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

Yes, the insider sale of Alector (ALEC) shares was made under a Rule 10b5-1 trading plan. The filing states the plan was adopted by Grace Wong-Sarad on September 5, 2025, indicating the trade followed a pre-arranged, systematic selling program.

Who is the insider involved in the latest Alector (ALEC) Form 4 filing?

The insider in the latest Alector (ALEC) Form 4 filing is Grace Wong-Sarad, the company’s Principal Accounting Officer. She reported an open-market sale of 4,079 shares of Alector common stock, executed under a previously adopted Rule 10b5-1 trading plan.