Fastly CFO sells 148K shares at $28.61 average

Fastly, Inc. (FSLY) reported that its CFO, Richard Wong, sold Class A Common Stock in a reported transaction.

Rhea-AI Filing Summary

Fastly, Inc. (FSLY) reported that its CFO, Richard Wong, sold Class A Common Stock in a reported transaction. On 2026-08-18, he sold 148,015 shares at a weighted average price of $28.61 per share, in multiple trades at prices ranging from $28.60 to $29.11. According to the disclosure, these shares were sold to satisfy tax obligations arising from the vesting of previously granted Restricted Stock Units. After this sale, Wong directly held 1,091,286 shares of Fastly Class A Common Stock.

Insider Trade Summary

Net Seller: 148,015 shares

Net Sell 1 txn

Insider WONG RICHARD

Role CFO

Sold 148,015 shs ($4.23M)

Type	Security	Shares	Price	Value
Sale	Class A Common Stock F1, F2	148,015	$28.61	$4.23M

Holdings After Transaction: Class A Common Stock — 1,091,286 shares (Direct)

Footnotes (2)

1. F1. Shares sold to satisfy tax obligations in connection with the vesting of previously granted Restricted Stock Units.
2. F2. The price reported in Column 4 is a weighted average price. These shares were sold in multiple transactions at prices ranging from $28.60 to $29.11, inclusive. The reporting person undertakes to provide to the Issuer, any security holder of the Issuer, or the staff of the SEC, upon request, full information regarding the number of shares sold at each separate price within the range set forth in footnote (2) to this Form 4.

Key Figures

Shares sold: 148,015 shares of Class A Common Stock Weighted average sale price: $28.61 per share Sale price range: $28.60 to $29.11 per share +1 more

4 metrics

Shares sold 148,015 shares of Class A Common Stock Non-derivative sale reported for 2026-08-18

Weighted average sale price $28.61 per share Weighted average price for the 148,015 shares sold

Sale price range $28.60 to $29.11 per share Range of prices for multiple transactions included in the sale

Shares owned after transaction 1,091,286 shares Direct holdings of Fastly Class A Common Stock by CFO after sale

Key Terms

Restricted Stock Units, weighted average price, Class A Common Stock

3 terms

Restricted Stock Units financial

"vesting of previously granted 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.

Class A Common Stock financial

"security_title: "Class A Common Stock""

Class A common stock is a category of a company’s shares that carries a specific set of ownership rights—most commonly defined voting power and claims on dividends—set out in the company’s charter. For investors it matters because the class determines how much influence you have over corporate decisions, the share’s likely dividend and trading behavior, and how it compares in value to other share classes, like choosing a particular seat with different privileges at the company’s decision-making table.

FAQ

AI-generated questions and answers. How Rhea-AI works. Not financial advice.

What insider transaction did Fastly (FSLY) disclose for CFO Richard Wong?

Fastly disclosed that CFO Richard Wong sold 148,015 shares of Class A Common Stock on 2026-08-18 at a weighted average price of $28.61 per share, in multiple trades, primarily to cover tax obligations from vesting Restricted Stock Units.

At what prices were the Fastly (FSLY) shares sold by the CFO?

The CFO’s 148,015 Fastly shares were sold at a weighted average price of $28.61 per share, in multiple transactions with individual prices ranging from $28.60 to $29.11, inclusive, as reported in the filing.

Why did Fastly’s (FSLY) CFO sell 148,015 shares?

The filing states that the 148,015 shares sold by Fastly’s CFO were sold to satisfy tax obligations in connection with the vesting of previously granted Restricted Stock Units, indicating a tax-related sale rather than a discretionary sale for other purposes.

How many Fastly (FSLY) shares does CFO Richard Wong hold after the reported sale?

After the reported transaction, CFO Richard Wong directly holds 1,091,286 shares of Fastly Class A Common Stock, according to the filing’s post-transaction ownership figure in the Form 4.

Was the Fastly (FSLY) CFO’s share sale reported as a Rule 10b5-1 trading plan transaction?

No. The document-level Rule 10b5-1 checkbox is unchecked, and the disclosure does not state that the 148,015-share sale by Fastly’s CFO was made pursuant to a Rule 10b5-1 trading plan.

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

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Available on EDGAR 08/20/2026 - 05:05 PM Accepted by SEC EDGAR 08/20/2026 - 05:04 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^*

WONG RICHARD

(Last) (First) (Middle)

C/O FASTLY, INC.

475 BRANNAN STREET, SUITE 300

(Street)

SAN FRANCISCO CALIFORNIA 94107

(City) (State) (Zip)

UNITED STATES

(Country)

2. Issuer Name and Ticker or Trading Symbol
Fastly, Inc. [ FSLY ]

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

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

2a. Foreign Trading Symbol

3. Date of Earliest Transaction (Month/Day/Year)
08/18/2026

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
Class A Common Stock	08/18/2026		S(1)		148,015	D	$28.61(2)	1,091,286	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. Shares sold to satisfy tax obligations in connection with the vesting of previously granted Restricted Stock Units.

2. The price reported in Column 4 is a weighted average price. These shares were sold in multiple transactions at prices ranging from $28.60 to $29.11, inclusive. The reporting person undertakes to provide to the Issuer, any security holder of the Issuer, or the staff of the SEC, upon request, full information regarding the number of shares sold at each separate price within the range set forth in footnote (2) to this Form 4.

Remarks:

	/s/ Tara Seracka, Attorney-in-Fact	08/20/2026
	** 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)