Alector, Inc. — Director's Dealing 2021

Dec 10, 2021

SEC Form 4 — Statement of Changes in Beneficial Ownership

Issuer: Alector, Inc. (ALEC)
CIK: 0001653087
Period of Report: 2021-12-08

Reporting Person: SULIMAN SHEHNAAZ (President and COO)

Non-Derivative Transactions

Date	Security	Code	Shares	Price	A/D	Holdings After	Ownership
2021-12-08	Common Stock	M	19813	$17.23	Acquired	122411	Direct
2021-12-08	Common Stock	M	55187	$10.24	Acquired	177598	Direct
2021-12-08	Common Stock	S	36511	$22.5583	Disposed	141087	Direct
2021-12-08	Common Stock	S	38489	$23.0115	Disposed	102598	Direct
2021-12-09	Common Stock	M	75000	$17.23	Acquired	177598	Direct
2021-12-09	Common Stock	S	72357	$22.8034	Disposed	105241	Direct
2021-12-09	Common Stock	S	2643	$23.4043	Disposed	102598	Direct

Derivative Transactions

Date	Security	Exercise Price	Code	Shares	A/D	Expiration	Underlying	Ownership
2021-12-08	Employee Stock Option (right to buy)	$17.23	M	19813	Disposed	2029-12-31	Common Stock (19813)	Direct
2021-12-08	Employee Stock Option (right to buy)	$10.24	M	55187	Disposed	2030-09-30	Common Stock (55187)	Direct
2021-12-09	Employee Stock Option (right to buy)	$17.23	M	75000	Disposed	2029-12-31	Common Stock (75000)	Direct

Footnotes

F1: Includes 755 shares acquired on December 1, 2020 and 1,843 shares acquired on June 1, 2021 pursuant to the Issuer's employee stock purchase plan.

F2: The sale reported in this Form 4 was effected pursuant to a Rule 10b5-1 trading plan.

F3: The price reported in Column 4 is a weighted average price. These shares were sold in multiple transactions at prices ranging from $21.94 to $22.92, inclusive. The reporting person undertakes to provide to the Issuer, any security holder of the Issuer, or the staff of the Securities and Exchange Commission, upon request, full information regarding the number of shares sold at each separate price within the ranges set forth in footnotes (2) through (6) to this Form 4.

F4: The price reported in Column 4 is a weighted average price. These shares were sold in multiple transactions at prices ranging from $22.94 to $23.10, inclusive.

F5: The price reported in Column 4 is a weighted average price. These shares were sold in multiple transactions at prices ranging from $22.36 to $23.35, inclusive.

F6: The price reported in Column 4 is a weighted average price. These shares were sold in multiple transactions at prices ranging from $23.36 to $23.44, inclusive.

F7: One-fourth of the shares subject to the option grant vested on December 9, 2020, and 1/48th vest monthly thereafter.

F8: The shares subject to the option vest in 48 equal monthly installments beginning on November 1, 2020.