ALEC Form 144 Filed for 5,717-Share Sale from RSU Vesting

Rhea-AI Filing Summary

Alector, Inc. (ALEC) Form 144 shows a proposed sale of 5,717 shares of common stock through Morgan Stanley Smith Barney on 09/02/2025 with an aggregate market value of $13,434.95. The shares were acquired by vesting of restricted stock units on 08/29/2025 totaling 11,257 units, with payment/settlement dated 08/29/2025. The filer previously sold 6,034 shares on 06/02/2025 for gross proceeds of $8,075.91. The filing includes the standard representation that the seller is not aware of undisclosed material adverse information about the issuer.

Positive

• Disclosure compliance: Form 144 submitted with required sale and acquisition details
• Proceeds sourced from RSU vesting: shares to be sold were acquired through vesting on 08/29/2025

Negative

• Insider selling shares: Proposed sale of 5,717 shares (though small relative to 101,212,329 outstanding)

Insights

Securities Analyst

TL;DR: Small insider sale arising from RSU vesting; amount is immaterial relative to shares outstanding.

The proposed sale of 5,717 shares stems from RSU vesting on 08/29/2025 and will be executed via Morgan Stanley Smith Barney on 09/02/2025. With 101,212,329 shares outstanding, the shares to be sold represent approximately 0.0056% of the outstanding common stock, indicating the transaction is likely routine compensation monetization rather than a major change in insider ownership. Prior sale on 06/02/2025 of 6,034 shares for $8,075.91 is disclosed, showing prior liquidity events by the same person. No information in the filing indicates undisclosed material developments at the company.

Compliance Officer

TL;DR: Filing appears to meet Rule 144 disclosure requirements and includes standard seller representations.

The form provides required details: class of security, broker, number of shares, aggregate value, acquisition method (vesting of RSUs), and prior sales in the past three months. The notice contains the seller's representation regarding absence of undisclosed material adverse information. The filing does not state a 10b5-1 plan adoption date or other trading-plan details, so no affirmative claim of a pre-arranged trading plan is evident in the form content.

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	5717	13434.95	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			11257	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
Grace Wong-Sarad C/O Alector, Inc. 131 Oyster Point Blvd., Suite 600 South San Francisco CA 94080	Common Stock	06/02/2025	6034	8075.91

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?

The form reports a proposed sale of 5,717 common shares via Morgan Stanley Smith Barney on 09/02/2025 with aggregate market value $13,434.95.

How were the shares being sold acquired?

The shares were acquired on 08/29/2025 by the vesting of restricted stock units, totaling 11,257 securities acquired on that date.

Has the seller sold other Alector shares recently?

Yes, the filing discloses a prior sale of 6,034 shares on 06/02/2025 for gross proceeds of $8,075.91.

What broker will execute the sale?

The sale is to be executed through Morgan Stanley Smith Barney LLC Executive Services on the Nasdaq exchange.

What representation does the seller make about material information?

By signing, the seller represents they do not know any material adverse information about the issuer that has not been publicly disclosed.