Alector (ALEC) Form 144 Discloses RSU Vesting and Planned Sale

Rhea-AI Filing Summary

Alector, Inc. (ALEC) filing of Form 144 reports an intended sale of 15,426 shares of common stock through Morgan Stanley Smith Barney LLC with an aggregate market value of $36,251.10. The filing shows approximately 101,212,329 shares outstanding and lists an approximate sale date of 09/02/2025.

The securities were acquired on 08/29/2025 by vesting of restricted stock units (30378 units originally noted) with payment dated 08/29/2025. The filer also disclosed a prior sale: 11,158 shares sold on 06/02/2025 for gross proceeds of $14,933.87. The notice contains the standard representation that the seller is not aware of undisclosed material adverse information.

Insights

Securities Analyst

TL;DR: Routine Rule 144 disclosure for an insider sale; size is small relative to outstanding shares and follows RSU vesting.

The Form 144 shows an intended disposition of 15,426 shares with a stated aggregate market value of $36,251.10 and an approximate sale date of 09/02/2025. The securities were acquired by RSU vesting on 08/29/2025 (30,378 units referenced), indicating this is a post-vesting sale of newly acquired shares rather than a purchase or loan-funded transaction. A prior sale of 11,158 shares on 06/02/2025 for $14,933.87 is also disclosed. From a market-impact perspective, the disclosed amounts are modest relative to the 101,212,329 shares outstanding reported in the filing.

Corporate Governance Expert

TL;DR: Filing appears compliant with Rule 144 disclosure requirements; includes broker and acquisition details.

The notice identifies the broker (Morgan Stanley Smith Barney LLC) and provides the acquisition method as vesting of restricted stock units on 08/29/2025, which aligns with customary disclosure practices for insider-derived shares. The filing contains the required representation regarding material nonpublic information. There are no statements in the filing indicating any unusual arrangements or exceptions to standard Rule 144 requirements.

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 Services 200 W Civic Center Dr. 4th Floor Sandy UT 84070	15426	36251.10	101212329	09/02/2025	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	08/29/2025	Vesting of Restricted Stock Units	Issuer			30378	08/29/2025	(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
Neil Berkley C/O Alector, Inc. 131 Oyster Point Blvd., Suite 600 South San Francisco CA 94080	Common Stock	06/02/2025	11158	14933.87

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 the Form 144 filed for ALEC report?

The Form 144 reports an intended sale of 15,426 shares of Alector common stock with an aggregate market value of $36,251.10 and an approximate sale date of 09/02/2025.

How were the securities being sold acquired according to the filing?

The securities were acquired by vesting of restricted stock units on 08/29/2025, with 30,378 units noted as acquired.

Who is the broker handling the sale listed in the filing?

The broker listed is Morgan Stanley Smith Barney LLC, Executive Services located at the address provided in the filing.

Did the filer disclose any prior sales of ALEC stock?

Yes. The filer disclosed a prior sale of 11,158 shares on 06/02/2025 for gross proceeds of $14,933.87.

How many shares outstanding does the filing list for ALEC?

The filing lists 101,212,329 shares outstanding.