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Alector, Inc. common stock was reported as beneficially owned by Deep Track Capital, LP, Deep Track Biotechnology Master Fund, Ltd., and David Kroin. Each reporting person reported 12,772,152 shares, or 8.61%, as of October 23, 2026. They reported shared voting and dispositive power over those shares, with no sole voting or dispositive power. The percentage calculation uses 148,256,805 shares outstanding as of October 16, 2026.
Key Figures
Beneficial ownership:12,772,152 sharesPercent of class:8.61%Shares outstanding:148,256,805 shares
3 metrics
Beneficial ownership12,772,152 sharesReported by each reporting person as of October 23, 2026
Percent of class8.61%Beneficial ownership percentage
Shares outstanding148,256,805 sharesAs of October 16, 2026; denominator cited for the beneficial ownership percentage
Beneficially owned describes securities or assets where a person has the economic rights and control—such as the right to receive dividends and to direct voting—even if legal title is held in another name. Think of it like having the keys and using a car that’s registered to someone else: you get the benefits and make decisions. Investors care because beneficial ownership reveals who truly controls value and voting power, affecting corporate decisions and takeover dynamics.
Shared Voting Powerregulatory
"Shared Voting Power 12,772,152.00"
Shared voting power occurs when two or more parties jointly have the right to vote or decide how a block of company shares is cast, like co-owners who must agree before moving a piece of furniture. Investors care because who controls voting rights affects board elections, major corporate decisions and takeover outcomes, and shared control can alter regulatory disclosures and the practical influence any holder has over a company’s direction and value.
Shared Dispositive Powerregulatory
"Shared Dispositive Power 12,772,152.00"
JOINT FILING STATEMENTregulatory
"JOINT FILING STATEMENT PURSUANT TO RULE 13d-1(k)"
FAQ
AI-generated questions and answers. How Rhea-AI works. Not financial advice.
How many ALEC shares did the reporting persons report beneficially owning?
Each of the three reporting persons reported beneficial ownership of 12,772,152 common shares, equal to 8.61% of the class. The ownership information is as of October 23, 2026.
What voting and disposition power did ALEC's reporting persons report?
Each reported shared voting power and shared dispositive power over 12,772,152 shares, with sole voting power and sole dispositive power both reported as zero.
(i) Delaware
(ii) Cayman Islands
(iii) United States
(d)
Title of class of securities:
Common
(e)
CUSIP Number(s):
014442107
Item 3.
If this statement is filed pursuant to §§ 240.13d-1(b) or 240.13d-2(b) or (c), check whether the person filing is a:
(a)
Broker or dealer registered under section 15 of the Act (15 U.S.C. 78o);
(b)
Bank as defined in section 3(a)(6) of the Act (15 U.S.C. 78c);
(c)
Insurance company as defined in section 3(a)(19) of the Act (15 U.S.C. 78c);
(d)
Investment company registered under section 8 of the Investment Company Act of 1940 (15 U.S.C. 80a-8);
(e)
An investment adviser in accordance with § 240.13d-1(b)(1)(ii)(E);
(f)
An employee benefit plan or endowment fund in accordance with § 240.13d-1(b)(1)(ii)(F);
(g)
A parent holding company or control person in accordance with § 240.13d-1(b)(1)(ii)(G);
(h)
A savings associations as defined in Section 3(b) of the Federal Deposit Insurance Act (12 U.S.C. 1813);
(i)
A church plan that is excluded from the definition of an investment company under section 3(c)(14) of the Investment Company Act of 1940 (15 U.S.C. 80a-3);
(j)
A non-U.S. institution in accordance with § 240.13d-1(b)(1)(ii)(J). If filing as a non-U.S. institution in accordance with § 240.13d-1(b)(1)(ii)(J),
please specify the type of institution:
(k)
Group, in accordance with Rule 240.13d-1(b)(1)(ii)(K).
Item 4.
Ownership
(a)
Amount beneficially owned:
12,772,152
(b)
Percent of class:
8.61%
(c)
Number of shares as to which the person has:
(i) Sole power to vote or to direct the vote:
0
(ii) Shared power to vote or to direct the vote:
12,772,152
(iii) Sole power to dispose or to direct the disposition of:
0
(iv) Shared power to dispose or to direct the disposition of:
12,772,152
Item 5.
Ownership of 5 Percent or Less of a Class.
Not Applicable
Item 6.
Ownership of more than 5 Percent on Behalf of Another Person.
Not Applicable
Item 7.
Identification and Classification of the Subsidiary Which Acquired the Security Being Reported on by the Parent Holding Company or Control Person.
If a parent holding company has filed this schedule, pursuant to Rule 13d-1(b)(ii)(G), so indicate under Item 3(g) and attach an exhibit stating the identity and the Item 3 classification of the relevant subsidiary. If a parent holding company has filed this schedule pursuant to Rule 13d-1(c) or Rule 13d-1(d), attach an exhibit stating the identification of the relevant subsidiary.
Deep Track Capital, LP is the relevant entity for which David Kroin may be considered a control person.
Item 8.
Identification and Classification of Members of the Group.
Not Applicable
Item 9.
Notice of Dissolution of Group.
Not Applicable
Item 10.
Certifications:
By signing below I certify that, to the best of my knowledge and belief, the securities referred to above were not acquired and are not held for the purpose of or with the effect of changing or influencing the control of the issuer of the securities and were not acquired and are not held in connection with or as a participant in any transaction having that purpose or effect, other than activities solely in connection with a nomination under § 240.14a-11.
SIGNATURE
After reasonable inquiry and to the best of my knowledge and belief, I certify that the information set forth in this statement is true, complete and correct.
Deep Track Capital, LP
Signature:
/s/ David Kroin
Name/Title:
David Kroin, Managing Member of the General Partner of the Investment Adviser
Date:
10/23/2026
Deep Track Biotechnology Master Fund, Ltd.
Signature:
/s/ David Kroin
Name/Title:
David Kroin, Director
Date:
10/23/2026
David Kroin
Signature:
/s/ David Kroin
Name/Title:
David Kroin
Date:
10/23/2026
Exhibit Information
Item 4: Information with respect to the Reporting Persons' ownership of the Common Stock as of October 23, 2026, is incorporated by reference to items (5) - (9) and (11) of the cover page of the respective Reporting Person.
The amount beneficially owned by each Reporting Person is determined using 148,256,805 shares outstanding as of October 16, 2026, as reported by the issuer on its Prospectus filed with the SEC on October 16, 2026.
JOINT FILING STATEMENT
PURSUANT TO RULE 13d-1(k)
The undersigned acknowledge and agree that the foregoing statement on SCHEDULE 13G, is filed on behalf of each of the undersigned and that all subsequent amendments to this statement on SCHEDULE 13G, shall be filed on behalf of each of the undersigned without the necessity of filing additional joint acquisition statements. The undersigned acknowledge that each shall be responsible for the timely filing of such amendments, and for the completeness and accuracy of the information concerning him or it contained therein, but shall not be responsible for the completeness and accuracy of the information concerning the others, except to the extent that he or it knows or has reason to believe that such information is inaccurate.
Dated: October 23, 2026
Deep Track Capital, LP
By: /s/ David Kroin
David Kroin, Managing Member of the General Partner of the Investment Adviser
Deep Track Biotechnology Master Fund, Ltd.
By: /s/ David Kroin
David Kroin, Director
David Kroin
By: /s/ David Kroin
David Kroin
