Alector (ALEC) accounting officer sells 1,820 shares in 10b5-1 trade

Rhea-AI Filing Summary

Alector, Inc. principal accounting officer Grace Wong-Sarad reported an open-market sale of 1,820 shares of common stock at $2.65 per share. The trade was executed under a pre-arranged Rule 10b5-1 Trading Plan. After the sale, she continues to hold 104,645 shares directly.

Insider Trade Summary 10b5-1

Net Seller: 1,820 shares ($4,823)

Net Sell 1 txn

Insider Wong-Sarad Grace

Role Principal Accounting Officer

Sold 1,820 shs ($5K)

Type	Security	Shares	Price	Value
Sale	Common Stock	1,820	$2.65	$5K

Holdings After Transaction: Common Stock — 104,645 shares (Direct)

Footnotes (1)

1. [object Object]

Key Figures

Shares sold: 1,820 shares Sale price: $2.65 per share Shares held after sale: 104,645 shares +2 more

5 metrics

Shares sold 1,820 shares Open-market sale of common stock

Sale price $2.65 per share Price for 1,820 sold shares

Shares held after sale 104,645 shares Direct holdings following transaction

Net shares sold 1,820 shares Net sell direction in this Form 4

Transaction date April 16, 2026 Date of open-market sale

Key Terms

Rule 10b5-1 Trading Plan, open-market sale, Form 4

3 terms

Rule 10b5-1 Trading Plan regulatory

"The sales reported in this Form 4 were effected pursuant to a Rule 10b5-1 Trading Plan adopted..."

A Rule 10b5-1 trading plan is a pre-arranged schedule that allows company insiders to buy or sell stock at specific times, even if they have inside information. It helps prevent accusations of unfair trading by making these transactions look planned and transparent, rather than sneaky or illegal.

open-market sale financial

"transaction_action": "open-market sale""

An open-market sale is when a shareholder sells existing shares directly on a public exchange to any willing buyer, rather than through a private deal. Think of it like putting goods on a busy market stall where price is set by supply and demand; for investors it matters because such sales increase available supply, can put short-term downward pressure on the stock price, and signal changes in liquidity or investor confidence.

Form 4 regulatory

"The sales reported in this Form 4 were effected pursuant to a Rule 10b5-1 Trading Plan..."

Form 4 is a official document that company insiders, such as executives or major shareholders, file with regulators whenever they buy or sell company shares. It provides transparency about how those with inside knowledge are trading, helping investors see if insiders are confident in the company's prospects or may be selling for personal reasons. This information can influence investor decisions by revealing insiders' perspectives on the company's value.

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 CALIFORNIA 94080

(City) (State) (Zip)

UNITED STATES

(Country)

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

2a. Foreign Trading Symbol

3. Date of Earliest Transaction (Month/Day/Year)
04/16/2026

6. Individual or Joint/Group Filing (Check Applicable Line)

X	Form filed by One Reporting Person
	Form filed by More than One Reporting Person

4. If Amendment, Date of Original Filed (Month/Day/Year)

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	04/16/2026		S(1)		1,820	D	$2.65	104,645	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	04/17/2026
	** 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.
* Form 4: SEC 1474 (03-26)

FAQ

What insider transaction did Alector (ALEC) report in this Form 4?

Alector reported that principal accounting officer Grace Wong-Sarad sold 1,820 shares of common stock in an open-market transaction at $2.65 per share, a relatively small portion of her total direct holdings.

Who is the insider selling Alector (ALEC) shares and what is her role?

The insider is Grace Wong-Sarad, Alector’s principal accounting officer. She is an officer of the company and reported this transaction as a direct holder of the shares involved in the open-market sale.

How many Alector (ALEC) shares did the officer sell and at what price?

Grace Wong-Sarad sold 1,820 shares of Alector common stock at a price of $2.65 per share. This single open-market sale reduced her direct position but left her with a significant remaining shareholding.

How many Alector (ALEC) shares does the insider hold after this sale?

Following the reported sale, Grace Wong-Sarad directly holds 104,645 shares of Alector common stock. This figure reflects her updated position after disposing of 1,820 shares in the open-market transaction.

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

Yes. The filing states the sale was effected pursuant to a Rule 10b5-1 Trading Plan adopted by Grace Wong-Sarad on September 5, 2025, indicating the trade was pre-planned rather than timed at her discretion.

Does this Alector (ALEC) Form 4 show any option exercises or derivative trades?

No. The reported activity involves only a non-derivative transaction in common stock. The derivative section shows no remaining derivative positions or option exercises associated with this specific Form 4 filing.