WONG-SARAD GRACE (Principal Accounting Officer) received a stock award from ALECTOR, INC.

Compensation award — not an open‑market transaction. Less informative as a directional signal.

A · 1 award

WONG-SARAD GRACE

Filed: 10/15/2026ACC: 0001193125-26-422867

InsiderWONG-SARAD GRACECIK 2074667

→

IssuerALECTOR, INC.CIK 1653087

Officer· Principal Accounting Officer

Since Mar 2026

+138.99K

Net shares

Net buyer

$0.00

Total acquired

Open market trades

0B · 0S

Total transactions

226.38K acquired · 87.39K disposed

Non-Derivative Transactions1

Common Stock

Direct

A · Award

+55.55K

Price / share

—

Trade value

—

% of position

52.4%

10/14/2026

106.02K→161.57K

Total

Net shares

+55.55K

Net value

$0.00

Security	Date	Type	Shares	Price / Share	Trade Value	% of Position	Held Before	Held After
Common Stock Direct	10/14/2026	A · Award	+55.55K	—	—	52.4%	106.02K	161.57K
Total			+55.55K		$0.00

Derivative Transactions13

Employee Stock Option (right to buy)

Direct

D · Disposition

Converts to

Common Stock

20K shares

−20K

Strike price

16.46

Held after

0.00

Exercisable

—

10/13/2026

Employee Stock Option (right to buy)

Direct

A · Award

Converts to

Common Stock

20K shares

+20K

Strike price

1.87

Held after

20K

Exercisable

—

10/13/2026

Employee Stock Option (right to buy)

Direct

D · Disposition

Converts to

Common Stock

13.84K shares

−13.84K

Strike price

17.15

Held after

0.00

Exercisable

—

10/13/2026

Employee Stock Option (right to buy)

Direct

A · Award

Converts to

Common Stock

13.84K shares

+13.84K

Strike price

1.87

Held after

13.84K

Exercisable

—

10/13/2026

Employee Stock Option (right to buy)

Direct

D · Disposition

Converts to

Common Stock

20.45K shares

−20.45K

Strike price

10.24

Held after

0.00

Exercisable

—

10/13/2026

Employee Stock Option (right to buy)

Direct

A · Award

Converts to

Common Stock

20.45K shares

+20.45K

Strike price

1.87

Held after

20.45K

Exercisable

—

10/13/2026

Employee Stock Option (right to buy)

Direct

D · Disposition

Converts to

Common Stock

10.23K shares

−10.23K

Strike price

13.56

Held after

0.00

Exercisable

—

10/13/2026

Employee Stock Option (right to buy)

Direct

A · Award

Converts to

Common Stock

10.23K shares

+10.23K

Strike price

1.87

Held after

10.23K

Exercisable

—

10/13/2026

Employee Stock Option (right to buy)

Direct

D · Disposition

Converts to

Common Stock

11.55K shares

−11.55K

Strike price

23.70

Held after

0.00

Exercisable

—

10/13/2026

Employee Stock Option (right to buy)

Direct

A · Award

Converts to

Common Stock

11.55K shares

+11.55K

Strike price

1.87

Held after

11.55K

Exercisable

—

10/13/2026

Employee Stock Option (right to buy)

Direct

D · Disposition

Converts to

Common Stock

11.31K shares

−11.31K

Strike price

9.46

Held after

0.00

Exercisable

—

10/13/2026

Employee Stock Option (right to buy)

Direct

A · Award

Converts to

Common Stock

11.31K shares

+11.31K

Strike price

1.87

Held after

11.31K

Exercisable

—

10/13/2026

Employee Stock Option (right to buy)

Direct

A · Award

Converts to

Common Stock

83.44K shares

+83.44K

Strike price

1.88

Held after

83.44K

Exercisable

—

10/14/2026

Security	Converts To	Date	Type	Shares	Strike Price	Exercisable	Held After
Employee Stock Option (right to buy) Direct	Common Stock20K shares	10/13/2026	D · Disposition	−20K	16.46	—	0.00
Employee Stock Option (right to buy) Direct	Common Stock20K shares	10/13/2026	A · Award	+20K	1.87	—	20K
Employee Stock Option (right to buy) Direct	Common Stock13.84K shares	10/13/2026	D · Disposition	−13.84K	17.15	—	0.00
Employee Stock Option (right to buy) Direct	Common Stock13.84K shares	10/13/2026	A · Award	+13.84K	1.87	—	13.84K
Employee Stock Option (right to buy) Direct	Common Stock20.45K shares	10/13/2026	D · Disposition	−20.45K	10.24	—	0.00
Employee Stock Option (right to buy) Direct	Common Stock20.45K shares	10/13/2026	A · Award	+20.45K	1.87	—	20.45K
Employee Stock Option (right to buy) Direct	Common Stock10.23K shares	10/13/2026	D · Disposition	−10.23K	13.56	—	0.00
Employee Stock Option (right to buy) Direct	Common Stock10.23K shares	10/13/2026	A · Award	+10.23K	1.87	—	10.23K
Employee Stock Option (right to buy) Direct	Common Stock11.55K shares	10/13/2026	D · Disposition	−11.55K	23.70	—	0.00
Employee Stock Option (right to buy) Direct	Common Stock11.55K shares	10/13/2026	A · Award	+11.55K	1.87	—	11.55K
Employee Stock Option (right to buy) Direct	Common Stock11.31K shares	10/13/2026	D · Disposition	−11.31K	9.46	—	0.00
Employee Stock Option (right to buy) Direct	Common Stock11.31K shares	10/13/2026	A · Award	+11.31K	1.87	—	11.31K
Employee Stock Option (right to buy) Direct	Common Stock83.44K shares	10/14/2026	A · Award	+83.44K	1.88	—	83.44K