Alector files 8-K furnishing Exhibit 99.1 for quarter ended Sep 30, 2025

Rhea-AI Filing Summary

Alector, Inc. furnished an 8-K announcing financial results for the quarter ended September 30, 2025. The company provided a press release detailing these results, attached as Exhibit 99.1.

The information under Item 2.02 and Item 9.01 (including Exhibit 99.1) is furnished and not deemed “filed” under the Exchange Act. The filing also includes Exhibit 104 containing the cover page Inline XBRL tags.

8-K Event Classification

2 items: 2.02, 9.01

2 items

Item 2.02 Results of Operations and Financial Condition Financial

Disclosure of earnings results, typically an earnings press release or preliminary financials.

Item 9.01 Financial Statements and Exhibits Exhibits

Financial statements, pro forma financial information, and exhibit attachments filed with this report.

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Accepted by SEC EDGAR 11/06/2025 - 04:12 PM Learn about SEC filing dates

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UNITED STATES
SECURITIES AND EXCHANGE COMMISSION
WASHINGTON, D.C. 20549

FORM 8-K

CURRENT REPORT

Pursuant to Section 13 or 15(d) of the Securities Exchange Act of 1934

Date of Report (Date of earliest event reported): November 06, 2025

Alector, Inc.

(Exact name of Registrant as Specified in Its Charter)

Delaware			001-38792	82-2933343
(State or Other Jurisdiction of Incorporation)			(Commission File Number)	(IRS Employer Identification No.)
131 Oyster Point Blvd. Suite 600
South San Francisco, California				94080
(Address of Principal Executive Offices)				(Zip Code)

Registrant’s Telephone Number, Including Area Code: (415) 231-5660

(Former Name or Former Address, if Changed Since Last Report)

Check the appropriate box below if the Form 8-K filing is intended to simultaneously satisfy the filing obligation of the registrant under any of the following provisions:

☐Written communications pursuant to Rule 425 under the Securities Act (17 CFR 230.425)

☐Soliciting material pursuant to Rule 14a-12 under the Exchange Act (17 CFR 240.14a-12)

☐Pre-commencement communications pursuant to Rule 14d-2(b) under the Exchange Act (17 CFR 240.14d-2(b))

☐Pre-commencement communications pursuant to Rule 13e-4(c) under the Exchange Act (17 CFR 240.13e-4(c))

Securities registered pursuant to Section 12(b) of the Act:

Title of each class		Trading Symbol(s)		Name of each exchange on which registered
Common Stock		ALEC		The Nasdaq Stock Market LLC

Indicate by check mark whether the registrant is an emerging growth company as defined in Rule 405 of the Securities Act of 1933 (§ 230.405 of this chapter) or Rule 12b-2 of the Securities Exchange Act of 1934 (§ 240.12b-2 of this chapter).

Emerging growth company ☐

If an emerging growth company, indicate by check mark if the registrant has elected not to use the extended transition period for complying with any new or revised financial accounting standards provided pursuant to Section 13(a) of the Exchange Act. ☐

Item 2.02 Results of Operations and Financial Condition.

On November 6, 2025, Alector, Inc. (the “Company”) announced its financial results for the quarter ended September 30, 2025. A press release announcing these results, which is attached hereto as Exhibit 99.1, is incorporated herein by reference.

All of the information furnished in Item 2.02 and Item 9.01 (including Exhibit 99.1) shall not be deemed to be “filed” for purposes of Section 18 of the Securities Exchange Act of 1934, as amended, and shall not be incorporated by reference in any filing under the Securities Act of 1933, as amended, or the Securities Exchange Act of 1934, as amended, except as shall be expressly set forth by specific reference in such a filing.

Item 9.01 Financial Statements and Exhibits.

(d) Exhibits

Exhibit No.	Description
99.1	Press Release dated November 6, 2025
104	Cover Page Interactive Data File (the cover page XBRL tags are embedded within the Inline XBRL document).

SIGNATURES

Pursuant to the requirements of the Securities Exchange Act of 1934, the registrant has duly caused this report to be signed on its behalf by the undersigned thereunto duly authorized.

			ALECTOR, INC.
Date:	November 6, 2025	By:	/s/ Arnon Rosenthal
			Arnon Rosenthal, Ph.D. Co-founder and Chief Executive Officer

FAQ

What did Alector (ALEC) report in this 8-K?

Alector furnished financial results for the quarter ended September 30, 2025, via a press release attached as Exhibit 99.1.

How is the information in Alector’s 8-K treated under the Exchange Act?

The Item 2.02 and Item 9.01 information (including Exhibit 99.1) is furnished and not deemed “filed” under Section 18.

Which period does the Alector (ALEC) results cover?

The results cover the quarter ended September 30, 2025.

Which exhibits are included with this Alector 8-K?

Exhibits include 99.1 (press release dated November 6, 2025) and 104 (cover page Inline XBRL tags).

On which exchange does Alector (ALEC) trade?

Alector’s common stock trades on The Nasdaq Stock Market LLC under the ticker ALEC.

Does the 8-K include detailed financial figures?

Detailed figures are contained in the attached Exhibit 99.1 press release.