Alector (ALEC) officer sells 1,000 shares under 10b5-1 plan

Rhea-AI Filing Summary

Alector, Inc. principal accounting officer Grace Wong-Sarad reported an open-market sale of 1,000 shares of common stock at $2.65 per share. The transaction took place on March 10, 2026, and she now holds 106,465 shares directly. The filing notes the sale was made under a Rule 10b5-1 trading plan adopted on September 5, 2025, indicating it was pre-scheduled rather than a discretionary trade.

Insider Trade Summary 10b5-1

Net Seller: 1,000 shares ($2,650)

Net Sell 1 txn

Insider Wong-Sarad Grace

Role Principal Accounting Officer

Sold 1,000 shs ($3K)

Type	Security	Shares	Price	Value
Sale	Common Stock	1,000	$2.65	$3K

Holdings After Transaction: Common Stock — 106,465 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)
03/10/2026

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	03/10/2026		S(1)		1,000	D	$2.65	106,465	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.

	/s/Grace Wong-Sarad	03/12/2026
	** 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 for Grace Wong-Sarad?

Alector reported that principal accounting officer Grace Wong-Sarad sold 1,000 common shares. The shares were sold in an open-market transaction at $2.65 per share on March 10, 2026, according to a Form 4 filing.

At what price were the Alector (ALEC) shares sold in the latest Form 4?

The reported Alector shares were sold at $2.65 per share. Principal accounting officer Grace Wong-Sarad executed an open-market sale of 1,000 common shares at this price on March 10, 2026, as disclosed in the Form 4.

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

Grace Wong-Sarad holds 106,465 Alector common shares after the sale. Following the open-market disposition of 1,000 shares, the Form 4 shows her remaining direct ownership at 106,465 shares of Alector, Inc. common stock.

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

Yes, the reported sale was executed under a Rule 10b5-1 trading plan. A footnote explains the transactions were carried out pursuant to a pre-established Rule 10b5-1 plan adopted by Grace Wong-Sarad on September 5, 2025.

What is the role of Grace Wong-Sarad at Alector (ALEC)?

Grace Wong-Sarad serves as Alector’s principal accounting officer. The Form 4 identifies her as an officer of Alector, Inc., and reports her open-market sale of 1,000 shares of the company’s common stock on March 10, 2026.

Does the Alector (ALEC) Form 4 show a buy or sell transaction?

The Form 4 shows a sell transaction in Alector shares. It reports an open-market sale (transaction code “S”) of 1,000 shares of Alector, Inc. common stock by principal accounting officer Grace Wong-Sarad at $2.65 per share.