SEC FORM 3 SEC Form 3
FORM 3 UNITED STATES SECURITIES AND EXCHANGE COMMISSION
Washington, D.C. 20549

INITIAL STATEMENT OF BENEFICIAL OWNERSHIP OF SECURITIES

Filed pursuant to Section 16(a) of the Securities Exchange Act of 1934
or Section 30(h) of the Investment Company Act of 1940
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1. Name and Address of Reporting Person*
GORDON CARL L

(Last) (First) (Middle)
C/O ORBIMED ADVISORS, LLC
601 LEXINGTON AVENUE, 54TH FLOOR

(Street)
NEW YORK NY 10022

(City) (State) (Zip)
2. Date of Event Requiring Statement (Month/Day/Year)
02/06/2019
3. Issuer Name and Ticker or Trading Symbol
Alector, Inc. [ ALEC ]
4. Relationship of Reporting Person(s) to Issuer
(Check all applicable)
X Director X 10% Owner
Officer (give title below) Other (specify below)
5. If Amendment, Date of Original Filed (Month/Day/Year)
6. Individual or Joint/Group Filing (Check Applicable Line)
X Form filed by One Reporting Person
Form filed by More than One Reporting Person
Table I - Non-Derivative Securities Beneficially Owned
1. Title of Security (Instr. 4) 2. Amount of Securities Beneficially Owned (Instr. 4) 3. Ownership Form: Direct (D) or Indirect (I) (Instr. 5) 4. Nature of Indirect Beneficial Ownership (Instr. 5)
Table II - Derivative Securities Beneficially Owned
(e.g., puts, calls, warrants, options, convertible securities)
1. Title of Derivative Security (Instr. 4) 2. Date Exercisable and Expiration Date (Month/Day/Year) 3. Title and Amount of Securities Underlying Derivative Security (Instr. 4) 4. Conversion or Exercise Price of Derivative Security 5. Ownership Form: Direct (D) or Indirect (I) (Instr. 5) 6. Nature of Indirect Beneficial Ownership (Instr. 5)
Date Exercisable Expiration Date Title Amount or Number of Shares
Series A-1 Preferred Stock (1) (1) Common Stock 405,925 (1) I See footnotes(2)(3)
Series A-1 Preferred Stock (1) (1) Common Stock 94,075 (1) I See footnotes(3)(4)
Series A-2 Preferred Stock (1) (1) Common Stock 4,282,288 (1) I See footnotes(2)(3)
Series A-2 Preferred Stock (1) (1) Common Stock 992,437 (1) I See footnotes(3)(4)
Series B Preferred Stock (1) (1) Common Stock 2,029,626 (1) I See footnotes(2)(3)
Series B Preferred Stock (1) (1) Common Stock 470,374 (1) I See footnotes(3)(4)
Series C Preferred Stock (1) (1) Common Stock 2,280,479 (1) I See footnotes(2)(3)
Series C Preferred Stock (1) (1) Common Stock 528,510 (1) I See footnotes(3)(4)
Series D Preferred Stock (1) (1) Common Stock 1,012,282 (1) I See footnotes(2)(3)
Series D Preferred Stock (1) (1) Common Stock 234,601 (1) I See footnotes(3)(4)
Series E Preferred Stock (1) (1) Common Stock 266,437 (1) I See footnotes(2)(3)
Series E Preferred Stock (1) (1) Common Stock 85,295 (1) I See footnotes(3)(4)
Explanation of Responses:
1. Each of the Series A-1 Preferred Stock, Series A-2 Preferred Stock, Series B Preferred Stock, Series C Preferred Stock, Series D Preferred Stock and Series E Preferred Stock shall automatically convert into shares of Common Stock on a one to one basis immediately prior to the completion of the Issuer's initial public offering of Common Stock and has no expiration date.
2. The Shares are held of record by OrbiMed Private Investments IV-AL, LP ("OrbiMed IV-AL"). OrbiMed Capital GP IV LLC ("OrbiMed GP"), is the general partner of OrbiMed IV-AL. OrbiMed Advisors LLC ("OrbiMed Advisors"), a registered adviser under the Investment Advisers Act of 1940, as amended, is the managing member of OrbiMed GP. By virtue of such relationships, OrbiMed GP and OrbiMed Advisors may be deemed to have voting and investment power over the securities held by OrbiMed IV-AL and as a result may be deemed to have beneficial ownership over such securities. The Reporting Person is a member of OrbiMed Advisors.
3. Each of OrbiMed GP, OrbiMed Advisors and the Reporting Person disclaims beneficial ownership of the securities reported herein for purposes of Rule 16a-1(a) under the Securities Exchange Act of 1934, as amended (the "Exchange Act"), except to the extent of its or his pecuniary interest therein, if any. This report on Form 3 shall not be deemed an admission that any of the reporting persons is a beneficial owner of such securities for the purpose of Section 16 of the Exchange Act, or for any other purpose.
4. The Shares are held of record by OrbiMed Private Investments IV-AL (Feeder), LP ("OrbiMed IV-AL (Feeder)"). OrbiMed GP is the general partner of OrbiMed IV-AL (Feeder). OrbiMed Advisors, a registered adviser under the Investment Advisers Act of 1940, as amended, is the managing member of OrbiMed GP. By virtue of such relationships, OrbiMed GP and OrbiMed Advisors may be deemed to have voting and investment power over the securities held by OrbiMed IV-AL (Feeder) and as a result may be deemed to have beneficial ownership over such securities. The Reporting Person is a member of OrbiMed Advisors.
Remarks:
/s/ Stephanie Yonker, attorney-in-fact 02/06/2019
** Signature of Reporting Person Date
Reminder: Report on a separate line for each class of securities beneficially owned directly or indirectly.
* If the form is filed by more than one reporting person, see Instruction 5 (b)(v).
** Intentional misstatements or omissions of facts constitute Federal Criminal Violations See 18 U.S.C. 1001 and 15 U.S.C. 78ff(a).
Note: File three copies of this Form, one of which must be manually signed. If space is insufficient, see Instruction 6 for procedure.
Persons who respond to the collection of information contained in this form are not required to respond unless the form displays a currently valid OMB Number.
POWER OF ATTORNEY

The undersigned, as a Section 16 reporting person of Alector, Inc. (the
"Company"), hereby constitutes and appoints Sabah Oney, Calvin Yu, David Oh and
Stephanie Yonker, and each of them, as the undersigned's true and lawful
attorney-in-fact to: 

1.	prepare, execute in the undersigned's name and on the undersigned's behalf,
and submit to the Securities and Exchange Commission (the "SEC") a Form ID,
including amendments thereto, and any other documents necessary or appropriate
to obtain EDGAR codes and passwords enabling the undersigned to make electronic
filings with the SEC of reports required by Section 16(a) of the Securities
Exchange Act of 1934 or any rule or regulation of the SEC;

2.	complete and execute Forms 3, 4 and 5 and other forms and all amendments
thereto as such attorney-in-fact shall in his discretion determine to be
required or advisable pursuant to Section 16 of the Securities Exchange Act of
1934 (as amended) and the rules and regulations promulgated thereunder, or any
successor laws and regulations, as a consequence of the undersigned's ownership,
acquisition or disposition of securities of the Company; and

3.	do all acts necessary in order to file such forms with the SEC, any
securities
 exchange or national association, the Company and such other person
or agency as the attorneys-in-fact shall deem appropriate.

The undersigned hereby ratifies and confirms all that said attorneys-in-fact and
agents shall do or cause to be done by virtue hereof.  The undersigned
acknowledges that the foregoing attorneys-in-fact, in serving in such capacity
at the request of the undersigned, are not assuming, nor is the Company
assuming, any of the undersigned's responsibilities to comply with Section 16 of
the Securities Exchange Act of 1934 (as amended).

This Power of Attorney shall remain in full force and effect until the
undersigned is no longer required to file Forms 3, 4 and 5 with respect to the
undersigned's holdings of and transactions in securities issued by the Company,
unless earlier revoked by the undersigned in a signed writing delivered to the
Company and the foregoing attorneys-in-fact. 

IN WITNESS WHEREOF, the undersigned has caused this Power of Attorney to be
executed as of this 6th day of February, 2019.


Signature:  /s/	Carl Gordon		

Print Name:  Carl Gordon