Alector CFO sells 29K shares to cover taxes

Alector’s CFO & Chief Business Officer sold shares to cover tax obligations tied to RSU vesting and continues to hold a substantial direct stake.

Rhea-AI Filing Summary

Alector, Inc. (ALEC) reported that its CFO & Chief Business Officer, Berkley Neil Lindsay, sold 29,251 shares of common stock on September 3, 2026 at a weighted average price of $2.6648 per share. The company reports the sale was made to satisfy the reporting person's tax obligations arising from the vesting of restricted stock units. Following this transaction, Lindsay directly holds 350,649 shares of Alector common stock. No Rule 10b5-1 trading plan is reported for this sale.

Insider Trade Summary

Net Seller: 29,251 shares

Net Sell 1 txn

Insider Berkley Neil Lindsay

Role CFO & Chief Business Officer

Sold 29,251 shs ($78K)

Type	Security	Shares	Price	Value
Sale	Common Stock F1, F2	29,251	$2.6648	$78K

Holdings After Transaction: Common Stock — 350,649 shares (Direct)

Footnotes (2)

1. F1. The reported shares were sold to satisfy the reporting person's tax obligations in connection with the vesting of restricted stock units, or RSUs.
2. F2. The price reported in Column 4 is a weighted average price. The shares were sold in multiple transactions at prices ranging from $2.49 to $2.75. Full information regarding the number of shares sold at each separate price can be furnished to the SEC staff, the issuer, or any security holder of the issuer upon request.

Key Figures

Shares sold: 29,251 shares Weighted average sale price: $2.6648 per share Shares held after transaction: 350,649 shares +1 more

4 metrics

Shares sold 29,251 shares Common stock sale on September 3, 2026 to satisfy tax obligations

Weighted average sale price $2.6648 per share Average price across multiple trades ranging from $2.49 to $2.75

Shares held after transaction 350,649 shares Direct ownership by Berkley Neil Lindsay after the September 3, 2026 sale

Sale price range $2.49–$2.75 per share Range of individual trade prices within the reported sale

Key Terms

restricted stock units, weighted average price, Rule 10b5-1 trading plan, tax obligations

4 terms

restricted stock units financial

"tax obligations in connection with the vesting of restricted stock units"

Restricted stock units are a type of company reward where employees are promised shares of stock, but they only fully own these shares after meeting certain conditions, like staying with the company for a set time. They matter because they can become valuable assets and are often used to motivate employees to help the company succeed.

weighted average price financial

"The price reported in Column 4 is a weighted average price"

Weighted average price is the average price of a security where each trade or component is counted according to its size, so bigger trades pull the average more than smaller ones. Think of it like calculating the average cost of a grocery haul where items you bought more of have greater influence on the final per-item cost. Investors use it to understand the true average price paid or received, judge execution quality, and compare trading performance against market movement.

Rule 10b5-1 trading plan regulatory

"No Rule 10b5-1 trading plan is reported for this sale"

A Rule 10b5-1 trading plan is a pre-arranged schedule that allows company insiders to buy or sell stock at specific times, even if they have inside information. It helps prevent accusations of unfair trading by making these transactions look planned and transparent, rather than sneaky or illegal.

tax obligations financial

"shares were sold to satisfy the reporting person's tax obligations"

FAQ

What insider transaction did ALEC disclose for Berkley Neil Lindsay?

ALEC disclosed that Berkley Neil Lindsay, its CFO & Chief Business Officer, sold 29,251 shares of common stock on September 3, 2026 at a weighted average price of $2.6648 per share in an open market or private transaction.

Why did the ALEC insider sell 29,251 shares?

The filing states the 29,251 shares were sold to satisfy Berkley Neil Lindsay’s tax obligations arising from the vesting of restricted stock units (RSUs). The sale is characterized as a tax-related transaction rather than a discretionary portfolio trade.

How many Alector (ALEC) shares does Berkley Neil Lindsay hold after the sale?

After the reported sale, Berkley Neil Lindsay directly holds 350,649 shares of Alector common stock. This figure reflects his direct ownership position immediately following the September 3, 2026 transaction.

Was the ALEC insider’s sale under a Rule 10b5-1 trading plan?

No. The filing indicates that the Rule 10b5-1 checkbox is not marked as affirmative and contains no footnote stating that the sale was made under a Rule 10b5-1 trading plan, so no such plan is reported for this transaction.

What price range did the ALEC insider receive for the sold shares?

The sale price reported is a weighted average of $2.6648 per share. The shares were sold in multiple transactions at prices ranging from $2.49 to $2.75 per share. Detailed per-trade data is available to regulators or shareholders on request.

What role does Berkley Neil Lindsay hold at Alector (ALEC)?

Berkley Neil Lindsay serves as CFO & Chief Business Officer of Alector, Inc., according to the ownership report associated with this Form 4 insider transaction.

AI-generated analysis. How Rhea-AI works. Not financial advice.

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Available on EDGAR 09/04/2026 - 05:45 PM Accepted by SEC EDGAR 09/04/2026 - 05:45 PM Learn about SEC filing dates

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).

Check this box to indicate that a transaction was made pursuant to a contract, instruction or written plan for the purchase or sale of equity securities of the issuer that is intended to satisfy the affirmative defense conditions of Rule 10b5-1(c). See Instruction 10.

1. Name and Address of Reporting Person^*

Berkley Neil Lindsay

(Last) (First) (Middle)

C/O ALECTOR, INC.

131 OYSTER POINT BLVD, SUITE 600

(Street)

SOUTH SAN FRANCISCO CALIFORNIA 94080

(City) (State) (Zip)

UNITED STATES

(Country)

2. Issuer Name and Ticker or Trading Symbol
Alector, Inc. [ ALEC ]

5. Relationship of Reporting Person(s) to Issuer
(Check all applicable)

	Director		10% Owner
X	Officer (give title below)		Other (specify below)
	CFO & Chief Business Officer

2a. Foreign Trading Symbol

3. Date of Earliest Transaction (Month/Day/Year)
09/03/2026

6. Individual or Joint/Group Filing (Check Applicable Line)

X	Form filed by One Reporting Person
	Form filed by More than One Reporting Person

4. If Amendment, Date of Original Filed (Month/Day/Year)

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	09/03/2026		S(1)		29,251	D	$2.6648(2)	350,649	D

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

Explanation of Responses:

1. The reported shares were sold to satisfy the reporting person's tax obligations in connection with the vesting of restricted stock units, or RSUs.

2. The price reported in Column 4 is a weighted average price. The shares were sold in multiple transactions at prices ranging from $2.49 to $2.75. Full information regarding the number of shares sold at each separate price can be furnished to the SEC staff, the issuer, or any security holder of the issuer upon request.

	/s/ Grace Wong-Sarad, by power of attorney	09/04/2026
	** 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).
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.
* Form 4: SEC 1474 (03-26)