Alector (NASDAQ: ALEC) Rule 144 notice lists RSU vesting and stock sales

Rhea-AI Filing Summary

Alector, Inc. submits a Rule 144 notice regarding recent common stock activity. The filing records the vesting of 10,295 Restricted Stock Units on 06/01/2026 and lists multiple prior open-market dispositions by Grace Wong-Sarad in Feb–Apr 2026. The securities are Common Stock listed on Nasdaq.

Key Figures

RSU vesting: 10,295 shares Disposition example: 4,079 shares Disposition example: 8,071 shares +3 more

6 metrics

RSU vesting 10,295 shares Vesting of Restricted Stock Units on 06/01/2026

Disposition example 4,079 shares Sale on 02/26/2026 by Grace Wong-Sarad

Disposition example 8,071 shares Sale on 03/02/2026 by Grace Wong-Sarad

Disposition example 3,367 shares Sale on 03/03/2026 by Grace Wong-Sarad

Smaller dispositions 1,000 shares; 1,820 shares Sales on 03/10/2026 and 04/16/2026 by Grace Wong-Sarad

Proceeds examples 10197.5; 17138.02; 7012.02; 2650; 4823 Reported proceeds corresponding to each listed sale (currency units as shown)

Key Terms

Rule 144, Restricted Stock Units, Vesting, Issuer

4 terms

Rule 144 regulatory

"144: Securities To Be Sold"

Rule 144 is a U.S. securities regulation that sets conditions under which restricted or insider-held shares can be legally resold to the public, such as required holding periods, availability of public information, limits on how much can be sold at once, and certain filing requirements. For investors it matters because it determines when previously locked-up shares can enter the market — like a release valve that can increase supply, affect share price, and signal insider intent.

Restricted Stock Units financial

"Vesting of Restricted Stock Units"

Restricted stock units are a type of company reward where employees are promised shares of stock, but they only fully own these shares after meeting certain conditions, like staying with the company for a set time. They matter because they can become valuable assets and are often used to motivate employees to help the company succeed.

Vesting financial

"06/01/2026 | Vesting of Restricted Stock Units"

Vesting is the process by which you earn full ownership of something, like company stock or a retirement benefit, over time. It’s like earning the right to keep a gift piece by piece the longer you stay with a company, making sure employees stay committed before they receive all the benefits.

Issuer regulatory

"Vesting of Restricted Stock Units | Issuer"

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Form 144 Filer Information	UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 Form 144 NOTICE OF PROPOSED SALE OF SECURITIES PURSUANT TO RULE 144 UNDER THE SECURITIES ACT OF 1933
FORM 144

144: Filer Information

Filer CIK
Filer CCC
Is this a LIVE or TEST Filing?	LIVE TEST
Submission Contact Information
Name
Phone
E-Mail Address

144: Issuer Information

Name of Issuer

SEC File Number

Address of Issuer

Phone

Name of Person for Whose Account the Securities are To Be Sold

See the definition of "person" in paragraph (a) of Rule 144. Information is to be given not only as to the person for whose account the securities are to be sold but also as to all other persons included in that definition. In addition, information shall be given as to sales by all persons whose sales are required by paragraph (e) of Rule 144 to be aggregated with sales for the account of the person filing this notice.

Relationship to Issuer

144: Securities Information

Title of the Class of Securities To Be Sold	Name and Address of the Broker	Number of Shares or Other Units To Be Sold	Aggregate Market Value	Number of Shares or Other Units Outstanding	Approximate Date of Sale	Name the Securities Exchange
Common Stock	Morgan Stanley Smith Barney LLC Executive Financial Services 1 New York Plaza 8th Floor New York NY 10004	5239	10844.73	111026437	06/02/2026	Nasdaq

Furnish the following information with respect to the acquisition of the securities to be sold and with respect to the payment of all or any part of the purchase price or other consideration therefor:

144: Securities To Be Sold

Title of the Class	Date you Acquired	Nature of Acquisition Transaction	Name of Person from Whom Acquired	Is this a Gift?	Date Donor Acquired	Amount of Securities Acquired	Date of Payment	Nature of Payment *
Common Stock	06/01/2026	Vesting of Restricted Stock Units	Issuer			10295	06/01/2026	(1)

* If the securities were purchased and full payment therefor was not made in cash at the time of purchase, explain in the table or in a note thereto the nature of the consideration given. If the consideration consisted of any note or other obligation, or if payment was made in installments describe the arrangement and state when the note or other obligation was discharged in full or the last installment paid.

Furnish the following information as to all securities of the issuer sold during the past 3 months by the person for whose account the securities are to be sold.

144: Securities Sold During The Past 3 Months

Name and Address of Seller	Title of Securities Sold	Date of Sale	Amount of Securities Sold	Gross Proceeds
Grace Wong-Sarad C/O Alector, Inc. 131 Oyster Point Blvd., Suite 600 South San Francisco CA 94080	Common Stock	02/26/2026	4079	10197.5
Grace Wong-Sarad C/O Alector, Inc. 131 Oyster Point Blvd., Suite 600 South San Francisco CA 94080	Common Stock	03/02/2026	8071	17138.02
Grace Wong-Sarad C/O Alector, Inc. 131 Oyster Point Blvd., Suite 600 South San Francisco CA 94080	Common Stock	03/03/2026	3367	7012.02
Grace Wong-Sarad C/O Alector, Inc. 131 Oyster Point Blvd., Suite 600 South San Francisco CA 94080	Common Stock	03/10/2026	1000	2650
Grace Wong-Sarad C/O Alector, Inc. 131 Oyster Point Blvd., Suite 600 South San Francisco CA 94080	Common Stock	04/16/2026	1820	4823

144: Remarks and Signature

Remarks

Date of Notice

ATTENTION:

The person for whose account the securities to which this notice relates are to be sold hereby represents by signing this notice that he does not know any material adverse information in regard to the current and prospective operations of the Issuer of the securities to be sold which has not been publicly disclosed. If such person has adopted a written trading plan or given trading instructions to satisfy Rule 10b5-1 under the Exchange Act, by signing the form and indicating the date that the plan was adopted or the instruction given, that person makes such representation as of the plan adoption or instruction date.

Signature

ATTENTION: Intentional misstatements or omission of facts constitute Federal Criminal Violations (See 18 U.S.C. 1001)

FAQ

What does Alector's (ALEC) Form 144 report?

It reports RSU vesting and recent sales by a holder. The notice shows vesting of 10,295 Restricted Stock Units on 06/01/2026 and lists several Common Stock dispositions by Grace Wong-Sarad between 02/26/2026 and 04/16/2026.

How many shares were listed as sold by Grace Wong-Sarad in the filing?

The filing lists five separate dispositions totaling individual trades. Examples include 4,079 shares on 02/26/2026 and 8,071 shares on 03/02/2026, with other sales on 03/03/2026, 03/10/2026, and 04/16/2026.

When did the reported Restricted Stock Units vest for ALEC?

The filing states RSU vesting occurred on 06/01/2026. Specifically, 10,295 Restricted Stock Units vested on 06/01/2026 and are identified as Common Stock of the issuer.

Where is Alector's common stock listed as shown in the Form 144?

The filing identifies the exchange as Nasdaq. The securities type is listed as Common Stock and the filing includes broker/custodian information for the transactions.