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NAME OF REPORTING PERSONS

Polaris Venture Partners VI, L.P.

CHECK THE APPROPRIATE BOX IF A MEMBER OF A GROUP

(a) ☐ (b) ☒

SEC USE ONLY

CITIZENSHIP OR PLACE OF ORGANIZATION

Delaware

Accession Number:: 0001193125-20-033331
Form Type:: 13G Filing
Publication Date:: 2020-02-12 16:45:33

Filed By:: Polaris Venture Partners Vi, L.p.
Company:: Alector Inc. (NASDAQ:ALEC)
Filing Date:: 2020-02-12
SEC Url:: 13G Filing

Ownership Summary

Please notice the below summary table is generated without human intervention and may contain errors. Please refer to the complete filing displayed below for exact figures.

Name	Sole Voting Power	Shared Voting Power	Sole Dispositive Power	Shared Dispositive Power	Aggregate Amount Owned Power	Percent of Class
Polaris Venture Partners VI	498,468	0	498,468	0	498,468	0.7%
Polaris Venture Partners Founders 146 Fund VI	709,917	0	709,917	0	709,917	1.0%
Polaris Venture Partners VI (AIV)	9,350,877	0	9,350,877	0	9,350,877	13.6%
PVP VI (AIV) Feeder Corp. Holding Partnership	2,298,932	0	2,298,932	0	2,298,932	3.3%
Polaris Venture Management Co VI	12,858,194	0	12,858,194	0	12,858,194	18.7%
David Barrett	0	12,858,194	0	12,858,194	12,858,194	18.7%
Brian Chee	0	12,858,194	0	12,858,194	12,858,194	18.7%
Jonathan A. Flint	0	12,858,194	0	12,858,194	12,858,194	18.7%
Terrance G. McGuire	15,000	12,858,194	15,000	12,858,194	12,873,194	18.7%
Amir Nashat	0	12,858,194	0	12,858,194	12,858,194	18.7%
Bryce Youngren	0	12,858,194	0	12,858,194	12,858,194	18.7%

Filing

SECURITIES AND EXCHANGE COMMISSION

Washington, D.C. 20549

Schedule 13G

(Rule 13d-102)

INFORMATION TO BE INCLUDED IN STATEMENTS FILED

PURSUANT TO RULES 13d-1 (b), (c) AND (d) AND AMENDMENTS THERETO FILED

PURSUANT TO 13d-2 (b)

(Amendment No. )

Alector, Inc.

(Name of Issuer)

Common Stock, par value $0.0001 per share

(Title of Class of Securities)

014442107

(CUSIP Number)

December 31, 2019

(Date of Event Which Requires Filing of this Statement)

Check the appropriate box to designate the rule pursuant to which this Schedule is filed:

☐ Rule 13d-1(b)

☐ Rule 13d-1(c)

☒ Rule 13d-1(d)

*	The remainder of this cover page shall be filled out for a reporting persons initial filing on this form with respect to the subject class of securities, and for any subsequent amendment containing information which would alter disclosures provided in a prior cover page.

The information required on the remainder of this cover page shall not be deemed to be filed for the purpose of Section 18 of the Securities Exchange Act of 1934 (Act) or otherwise subject to the liabilities of that section of the Act but shall be subject to all other provisions of the Act (however, see the Notes).

(Continued on following pages)

CUSIP #014442107

(1)

All such are held of record by PVP VI (as defined in Item 2(a) below). PVM VI (as defined in Item 2(a) below), the general partner of PVP VI, may be deemed to have voting, investment and dispositive power with respect to these securities. David Barrett, Brian Chee, Jonathan A. Flint, Terrance G. McGuire, a member of the Issuers board of directors, Amir Nashat, and Bryce Youngren are the managing members of PVM VI and may each be deemed to share voting, investment and dispositive power with respect to these securities.

(2)	Based on 68,923,730 shares of Common Stock outstanding as of November 1, 2019, as reported on the Issuers Quarterly Report on Form 10-Q, for the quarter ended September 30, 2019 as filed with the United States Securities and Exchange Commission on November 12, 2019 (the Form 10-Q).

CUSIP #014442107

(1)

All such are held of record by PVPFF VI (as defined in Item 2(a) below). PVM VI, the general partner of PVPFF VI, may be deemed to have voting, investment and dispositive power with respect to these securities. David Barrett, Brian Chee, Jonathan A. Flint, Terrance G. McGuire, a member of the Issuers board of directors, Amir Nashat, and Bryce Youngren are the managing members of PVM VI and may each be deemed to share voting, investment and dispositive power with respect to these securities.

(2)	Based on 68,923,730 shares of Common Stock outstanding as of November 1, 2019, as reported on the Issuers Form 10-Q.

CUSIP #014442107

(1)

All such are held of record by PVP VI (AIV) (as defined in Item 2(a) below). PVM VI, the general partner of PVP VI (AIV), may be deemed to have voting, investment and dispositive power with respect to these securities. David Barrett, Brian Chee, Jonathan A. Flint, Terrance G. McGuire, a member of the Issuers board of directors, Amir Nashat, and Bryce Youngren are the managing members of PVM VI and may each be deemed to share voting, investment and dispositive power with respect to these securities.

(2)	Based on 68,923,730 shares of Common Stock outstanding as of November 1, 2019, as reported on the Issuers Form 10-Q.

CUSIP #014442107

(1)

All such are held of record by PVP VI Feeder (as defined in Item 2(a) below). PVM VI, the general partner of PVP VI Feeder, may be deemed to have voting, investment and dispositive power with respect to these securities. David Barrett, Brian Chee, Jonathan A. Flint, Terrance G. McGuire, a member of the Issuers board of directors, Amir Nashat, and Bryce Youngren are the managing members of PVM VI and may each be deemed to share voting, investment and dispositive power with respect to these securities.

(2)	Based on 68,923,730 shares of Common Stock outstanding as of November 1, 2019, as reported on the Issuers Form 10-Q.

CUSIP #014442107

(1)

498,468 of such shares are held of record by PVP VI, 709,917 of such shares are held of record by PVPFF VI, 9,350,877 of such shares are held of record by PVP VI (AIV) and 2,298,932 of such shares are held of record by PVP VI Feeder. PVM VI, the general partner of each of PVP VI, PVPFF VI, PVP VI (AIV) and PVP VI Feeder, may be deemed to have voting, investment and dispositive power with respect to these securities. David Barrett, Brian Chee, Jonathan A. Flint, Terrance G. McGuire, a member of the Issuers board of directors, Amir Nashat, and Bryce Youngren are the managing members of PVM VI and may each be deemed to share voting, investment and dispositive power with respect to these securities.

(2)	Based on 68,923,730 shares of Common Stock outstanding as of November 1, 2019, as reported on the Issuers Form 10-Q.

CUSIP #014442107

(1)

(2)	Based on 68,923,730 shares of Common Stock outstanding as of November 1, 2019, as reported on the Issuers Form 10-Q.

CUSIP #014442107

(1)

(2)	Based on 68,923,730 shares of Common Stock outstanding as of November 1, 2019, as reported on the Issuers Form 10-Q.

CUSIP #014442107

(1)

(2)	Based on 68,923,730 shares of Common Stock outstanding as of November 1, 2019, as reported on the Issuers Form 10-Q.

CUSIP #014442107

(1)	Consists of Common Stock subject to stock option awards that have been granted to Terrance G. McGuire in his capacity as a director of the Issuer and that are exercisable as of or within 60 days after December 31, 2019.

(2)

(3)

Based on 68,938,730 shares of Common Stock, calculated as follows: (i) 15,000 shares of Common Stock subject to stock option awards that have been granted to Mr. McGuire in his capacity as a director of the Issuer and that are exercisable as of or within 60 days after December 31, 2019 plus (ii) 68,923,730 shares of Common Stock outstanding as of November 1, 2019, as reported on the Issuers Form 10-Q.

CUSIP #014442107

(1)

(2)	Based on 68,923,730 shares of Common Stock outstanding as of November 1, 2019, as reported on the Issuers Form 10-Q.

CUSIP #014442107

(1)

(2)	Based on 68,923,730 shares of Common Stock outstanding as of November 1, 2019, as reported on the Issuers Form 10-Q.

SCHEDULE 13G

CUSIP #014442107

ITEM 1(A).

NAME OF ISSUER

Alector, Inc. (the Issuer)

ITEM 1(B).

ADDRESS OF ISSUERS PRINCIPAL EXECUTIVE OFFICES

131 Oyster Point Blvd, Suite 600

South San Francisco, CA 94080

ITEM 2(A).

NAME OF PERSONS FILING

This Schedule 13G is being filed on behalf of each of the following persons: Polaris Venture Partners VI, L.P. (PVP VI), Polaris Venture Partners Founders Fund VI, L.P. (PVPFF VI), Polaris Venture Partners VI (AIV), L.P. (PVP VI (AIV)), PVP VI (AIV) Feeder Corp. Holding Partnership, L.P. (PVP VI Feeder), Polaris Venture Management Co. VI, L.L.C. (PVM VI), David Barrett (Barrett), Brian Chee (Chee), Jonathan A. Flint (Flint), Terrance G. McGuire (McGuire), a member of the Issuers board of directors, Amir Nashat (Nashat), and Bryce Youngren (Youngren). The foregoing entities and individuals are collectively referred to as the Reporting Persons.

Barrett, Chee, Flint, McGuire, Nashat and Youngren are the managing members of PVM VI (the sole general partner of each of PVP VI, PVPFF VI, PVP VI (AIV) and PVP VI Feeder).

ITEM 2(B).

ADDRESS OF PRINCIPAL OFFICE

The address for each of the Reporting Persons except for Chee is:

c/o Polaris Partners

One Marina Park Drive, 10^th Floor

Boston, MA 02210

The address for Chee is:

c/o Polaris Partners

1 Letterman Drive

Building C, Suite 3600

San Francisco, CA 94129

ITEM 2(C).

CITIZENSHIP

PVP VI, PVPFF VI, PVP VI (AIV) and PVP VI Feeder are limited partnerships organized under the laws of the State of Delaware. PVM VI is a limited liability company organized under the laws of the State of Delaware.

Barrett, Chee, Flint, McGuire, Nashat and Youngren are United States citizens.

ITEM 2(D).

TITLE OF CLASS OF SECURITIES

Common Stock, par value $0.0001 per share

ITEM 2(E)

CUSIP NUMBER

014442107

ITEM 3.

IF THIS STATEMENT IS FILED PURSUANT TO RULE 13D-1(B), OR 13D-2(B) OR (C), CHECK WHETHER THE PERSON FILING IS A:

Not applicable.

ITEM 4.

OWNERSHIP

The approximate percentages of Common Stock reported as beneficially owned by the Reporting Persons are based upon 68,923,730 shares of Common Stock outstanding as of November 1, 2019, as reported on the Issuers Form 10-Q Quarterly Report Pursuant to Section 13 or 15(d) of the Securities Exchange Act of 1934, as amended, as filed with the United States Securities and Exchange Commission on November 12, 2019, plus, in the case of McGuire, 15,000 shares of Common Stock subject to stock option awards that have been granted to McGuire in his capacity as a director of the Issuer and that are exercisable as of or within 60 days after December 31, 2019.

The following information with respect to the ownership of the common stock of the Issuer by the Reporting Persons filing this Statement is provided as of December 31, 2019:

(a) Amount beneficially owned:

See Row 9 of cover page for each Reporting Person.

(b) Percent of Class:

See Row 11 of cover page for each Reporting Person.

(i) Sole power to vote or to direct the vote:

See Row 5 of cover page for each Reporting Person.

(ii) Shared power to vote or to direct the vote:

See Row 6 of cover page for each Reporting Person.

(iii) Sole power to dispose or to direct the disposition of:

See Row 7 of cover page for each Reporting Person.

(iv) Shared power to dispose or to direct the disposition of:

See Row 8 of cover page for each Reporting Person.

ITEM 5.

OWNERSHIP OF FIVE PERCENT OR LESS OF A CLASS

Not applicable.

ITEM 6.

OWNERSHIP OF MORE THAN FIVE PERCENT ON BEHALF OF ANOTHER PERSON.

Under certain circumstances set forth in the limited partnership agreement of each PVP VI, PVPFF VI, PVP VI (AIV) and PVP VI Feeder, and the limited liability company agreement of PVM VI, the general and limited partners or members of each such entity, as applicable, may be deemed to have the right to receive dividends from, or the proceeds from, the sale of shares of the issuer owned by each such entity of which they are a partner or member, as applicable.

ITEM 7.

IDENTIFICATION AND CLASSIFICATION OF THE SUBSIDIARY WHICH ACQUIRED THE SECURITY BEING REPORTED ON BY THE PARENT HOLDING COMPANY

Not applicable.

ITEM 8.

IDENTIFICATION AND CLASSIFICATION OF MEMBERS OF THE GROUP.

See Exhibit A.

ITEM 9.

NOTICE OF DISSOLUTION OF GROUP.

Not applicable

ITEM 10.

CERTIFICATION.

Not applicable

Material to be Filed as Exhibits.

Exhibit A Agreement regarding filing of joint Schedule 13G.

Exhibit B Power of Attorney (David Barrett)

Exhibit C Power of Attorney (Brian Chee)

CUSIP #014442107

SIGNATURES

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.

Date: February 12, 2020


POLARIS VENTURE PARTNERS VI, L.P.
By:		Polaris Venture Management Co. VI, L.L.C.

By:		*
		Authorized Signatory

POLARIS VENTURE PARTNERS VI (AIV), L.P.
By:		Polaris Venture Management Co. VI, L.L.C.

By:		*
		Authorized Signatory

PVP VI (AIV) FEEDER CORP. HOLDING PARTNERSHIP, L.P.
By:		Polaris Venture Management Co. VI, L.L.C.

By:		*
		Authorized Signatory

POLARIS VENTURE PARTNERS FOUNDERS FUND VI, L.P.

By:		Polaris Venture Management Co. VI, L.L.C.

By:		*
		Authorized Signatory

POLARIS VENTURE MANAGEMENT CO. VI, L.L.C.

By:		*
		Authorized Signatory

JONATHAN A. FLINT

By:		*
		Jonathan A. Flint

TERRANCE G. MCGUIRE

By:		*
		Terrance G. McGuire

BRYCE YOUNGREN

By:		*
		Bryce Youngren


DAVID BARRETT

By:		**
		David Barrett

BRIAN CHEE

By:		**
		Brian Chee

AMIR NASHAT

By:		*
		Amir Nashat


*By:		/s/ Lauren Crockett
Name:		Lauren Crockett
		Attorney-in-Fact

[*	This Schedule 13G was executed pursuant to a Power of Attorney. Note that copies of the applicable Powers of Attorney are already on file with the appropriate agencies.]

[**	This Schedule 13G was executed pursuant to a Power of Attorney. Note that a copy of the applicable Power of Attorney is included as an exhibit to this Schedule 13G.]