SEC Form 4

FORM 4		UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 STATEMENT OF CHANGES IN BENEFICIAL OWNERSHIP Filed pursuant to Section 16(a) of the Securities Exchange Act of 1934 or Section 30(h) of the Investment Company Act of 1940	OMB APPROVAL OMB Number: 3235-0287 Estimated average burden hours per response: 0.5
	Check this box if no longer subject to Section 16. Form 4 or Form 5 obligations may continue. See Instruction 1(b).

1. Name and Address of Reporting Person* MCGUIRE TERRANCE (Last) (First) (Middle) C/O ALECTOR, INC. 131 OYSTER POINT BLVD., SUITE 600 (Street) SOUTH SAN FRANCISCO CA 94080 (City) (State) (Zip)	2. Issuer Name and Ticker or Trading Symbol Alector, Inc. [ ALEC ]	5. Relationship of Reporting Person(s) to Issuer (Check all applicable) X Director X 10% Owner Officer (give title below) Other (specify below)
	3. Date of Earliest Transaction (Month/Day/Year) 06/14/2023
	4. 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
	Rule 10b5-1(c) Transaction Indication Check this box to indicate that a transaction was made pursuant to a contract, instruction or written plan that is intended to satisfy the affirmative defense conditions of Rule 10b5-1(c). See Instruction 10.

Table I - Non-Derivative Securities Acquired, Disposed of, or Beneficially Owned
1. Title of Security (Instr. 3)	2. Transaction Date (Month/Day/Year)	2A. Deemed Execution Date, if any (Month/Day/Year)	3. Transaction Code (Instr. 8)		4. Securities Acquired (A) or Disposed Of (D) (Instr. 3, 4 and 5)			5. Amount of Securities Beneficially Owned Following Reported Transaction(s) (Instr. 3 and 4)	6. Ownership Form: Direct (D) or Indirect (I) (Instr. 4)	7. Nature of Indirect Beneficial Ownership (Instr. 4)
			Code	V	Amount	(A) or (D)	Price
Common Stock	06/14/2023		A		26,250(1)	A	$0.00	48,567	D
Common Stock								11,853,817	I	See footnote(2)
Common Stock								26,266	I	See footnote(3)

Table II - Derivative Securities Acquired, Disposed of, or Beneficially Owned (e.g., puts, calls, warrants, options, convertible securities)
1. Title of Derivative Security (Instr. 3)	2. Conversion or Exercise Price of Derivative Security	3. Transaction Date (Month/Day/Year)	3A. Deemed Execution Date, if any (Month/Day/Year)	4. Transaction Code (Instr. 8)		5. Number of Derivative Securities Acquired (A) or Disposed of (D) (Instr. 3, 4 and 5)		6. Date Exercisable and Expiration Date (Month/Day/Year)		7. Title and Amount of Securities Underlying Derivative Security (Instr. 3 and 4)		8. Price of Derivative Security (Instr. 5)	9. Number of derivative Securities Beneficially Owned Following Reported Transaction(s) (Instr. 4)	10. Ownership Form: Direct (D) or Indirect (I) (Instr. 4)	11. Nature of Indirect Beneficial Ownership (Instr. 4)
				Code	V	(A)	(D)	Date Exercisable	Expiration Date	Title	Amount or Number of Shares
Stock Option (right to buy)	$7.71	06/14/2023		A		12,360		(4)	06/14/2033	Common Stock	12,360	$0.00	12,360	D

Explanation of Responses:

1. The reported shares are represented by restricted stock units, or RSUs, which vest on the earlier of (i) June 14, 2024 or (ii) the date of the Issuer's next annual meeting of stockholders.

2. 654,463 shares are held by Polaris Venture Partners Founders' Fund VI, L.P. ("PVPFF VI"), 8,589,364 shares are held by Polaris Venture Partners VI (AIV), L.P. ("PVP VI AIV"), 2,111,522 shares are held by Polaris Venture Partners VI (AIV-B), L.P. and 498,468 shares are held by Polaris Venture Partners VI, L.P. ("PVP VI")(collectively, the "Polaris Funds"). As a Managing Member of Polaris Venture Management Co. VI, L.L.C. ("PVM"), the Reporting Person may be deemed to share the power to vote and dispose of the shares held by the Polaris Funds. The Reporting Person disclaims beneficial ownership of the securities held by the Polaris Funds, and this report shall not be deemed an admission that he is the beneficial owner of such securities for purposes of Section 16 or for any other purpose, except to the extent of his respective pecuniary interest therein.

3. Shares held by McGuire Family 2008 GST Non-Exempt Irrevocable Trust ("McGuire Family Trust"). The Reporting Person, a member of the Issuer's board of directors, is the donor of McGuire Family Trust and may be deemed to have shared power to vote and dispose of the shares held by McGuire Family Trust.v

4. The shares subject to the option vest in 12 equal monthly installments beginning on July 14, 2023, provided that the shares subject to the option will vest in full on the earlier of the one-year anniversary of the date of grant or the date of the Issuer's next annual meeting of stockholders.

	/s/ Marc Grasso, by power of attorney	06/15/2023
	** 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 4 (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).
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