Alector, Inc. — Director's Dealing 2022

Jun 21, 2022

SEC Form 4 — Statement of Changes in Beneficial Ownership

Issuer: Alector, Inc. (ALEC)
CIK: 0001653087
Period of Report: 2022-06-16

Reporting Person: MCGUIRE TERRANCE (Director)

Non-Derivative Transactions

Date	Security	Code	Shares	Price	A/D	Holdings After	Ownership
2022-06-16	Common Stock	A	9459	$0.00	Acquired	15888	Direct

Derivative Transactions

Date	Security	Exercise Price	Code	Shares	A/D	Expiration	Underlying	Ownership
2022-06-16	Stock Option (right to buy)	$8.07	A	18918	Acquired	2032-06-16	Common Stock (18918)	Direct

Holdings (Non-Derivative)

Security	Shares	Ownership
Common Stock	12353817	Indirect
Common Stock	13133	Indirect

Footnotes

F1: The reported shares are represented by restricted stock units, or RSUs, which vest on the earlier of (i) June 16, 2023 or (ii) the date of the Issuer's next annual meeting of stockholders.

F2: Includes 682,069 shares are held by Polaris Venture Partners Founders' Fund VI, L.P. ("PVPFF VI"), 8,968,544 shares are held by Polaris Venture Partners VI (AIV), L.P. ("PVP VI AIV"), 2,204,736 shares are held by Polaris Venture Partners VI (AIV-B), L.P. (f/k/a PVP VI (AIV) Feeder Corp. Holding Partnership, L.P., "PVP VI AIV-B" 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.

F3: The shares are held by the McGuire Family Trust (the "Family Trust"). The reporting person is the donor of the Family Trust and may be deemed to have shared power to vote and dispose of the shares held by the Family Trust.

F4: The shares subject to the option vest in 12 equal monthly installments beginning on July 16, 2022, or if earlier, the date of the Issuer's next annual meeting of stockholders.