Alector (ALEC) accounting chief sells 3,367 shares under 10b5-1 plan

Rhea-AI Filing Summary

Alector, Inc. reported that Principal Accounting Officer Grace Wong-Sarad sold 3,367 shares of common stock in an open-market transaction. The sale occurred on March 3, 2026 at a weighted average price of $2.0826 per share, with individual sale prices ranging from $2.06 to $2.12. These transactions were made under a pre-established Rule 10b5-1 trading plan adopted on September 5, 2025. After this sale, Wong-Sarad directly owned 107,465 shares of Alector common stock.

Insider Trade Summary

Net Seller: 3,367 shares ($7,012)

Net Sell 1 txn

Insider Wong-Sarad Grace

Role Principal Accounting Officer

Sold 3,367 shs ($7K)

Type	Security	Shares	Price	Value
Sale	Common Stock	3,367	$2.0826	$7K

Holdings After Transaction: Common Stock — 107,465 shares (Direct)

Footnotes (1)

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. The price reported in Column 4 is a weighted average price. The shares were sold in multiple transactions at prices ranging from $2.06 to $2.12. 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.

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)
03/03/2026

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	03/03/2026		S(1)		3,367	D	$2.0826(2)	107,465	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.

2. The price reported in Column 4 is a weighted average price. The shares were sold in multiple transactions at prices ranging from $2.06 to $2.12. 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	03/03/2026
	** 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) disclose in this Form 4?

Alector disclosed that Principal Accounting Officer Grace Wong-Sarad sold 3,367 shares of common stock. The open-market sale occurred on March 3, 2026 under a pre-arranged Rule 10b5-1 trading plan adopted in September 2025.

At what prices were the Alector (ALEC) shares sold by the officer?

The reported weighted average sale price was $2.0826 per share. Shares were sold in multiple trades at prices ranging from $2.06 to $2.12, with detailed trade breakdowns available upon request from the company, the SEC staff, or shareholders.

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

Following the reported transaction, Principal Accounting Officer Grace Wong-Sarad directly owned 107,465 shares of Alector common stock. This figure reflects her holdings after selling 3,367 shares in the March 3, 2026 open-market transaction disclosed in the Form 4.

Was the Alector (ALEC) insider sale part of a pre-planned trading program?

Yes. The Form 4 states the sale was executed under a Rule 10b5-1 trading plan. That plan was adopted by Grace Wong-Sarad on September 5, 2025, allowing automated, pre-scheduled trades regardless of later market or company developments.

Who is the insider involved in the Alector (ALEC) Form 4 filing and what is their role?

The insider is Grace Wong-Sarad, who serves as Alector’s Principal Accounting Officer. She is an executive officer but not a director or 10% owner, and the Form 4 reports her personal open-market sale of Alector common stock.