Fastly CFO sells 47,676 shares in 10b5-1 trades

Fastly, Inc. (FSLY) reported that its CFO, Richard Wong, sold shares of Class A Common Stock in market transactions on August 21, 2026 pursuant to a Rule 10b5-1 trading plan adopted on May 22, 2026.

Rhea-AI Filing Summary

Fastly, Inc. (FSLY) reported that its CFO, Richard Wong, sold shares of Class A Common Stock in market transactions on August 21, 2026 pursuant to a Rule 10b5-1 trading plan adopted on May 22, 2026. The sales totaled 47,676 shares at weighted average prices of $23.64, $24.29, and $24.95, each representing multiple trades within specified price ranges.

Insider Trade Summary 10b5-1

Net Seller: 47,676 shares

Net Sell 3 txns

Insider WONG RICHARD

Role CFO

Sold 47,676 shs ($1.15M)

Type	Security	Shares	Price	Value
Sale	Class A Common Stock F1, F2	16,855	$23.64	$398K
Sale	Class A Common Stock F1, F3	29,013	$24.29	$705K
Sale	Class A Common Stock F1, F4	1,808	$24.95	$45K

Holdings After Transaction: Class A Common Stock — 1,043,610 shares (Direct)

Footnotes (4)

1. F1. The sale was effected pursuant to a Rule 10b5-1 trading plan adopted by the reporting person on May 22, 2026.
2. F2. 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 $23.935, 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 ranges set forth in footnotes (2), (3) and (4) to this Form 4.
3. F3. The price reported in Column 4 is a weighted average price. These shares were sold in multiple transactions at prices ranging from $23.94 to $24.93, inclusive.
4. F4. The price reported in Column 4 is a weighted average price. These shares were sold in multiple transactions at prices ranging from $24.94 to $24.96, inclusive.

Key Figures

Shares sold (first transaction): 16,855 shares Shares sold (second transaction): 29,013 shares Shares sold (third transaction): 1,808 shares +4 more

7 metrics

Shares sold (first transaction) 16,855 shares Class A Common Stock sale on August 21, 2026 at weighted average price $23.64

Shares sold (second transaction) 29,013 shares Class A Common Stock sale on August 21, 2026 at weighted average price $24.29

Shares sold (third transaction) 1,808 shares Class A Common Stock sale on August 21, 2026 at weighted average price $24.95

Total shares sold 47,676 shares Aggregate of three reported sale transactions by CFO Richard Wong

Price range for 16,855-share sale $22.94–$23.935 Multiple transactions, weighted average $23.64

Price range for 29,013-share sale $23.94–$24.93 Multiple transactions, weighted average $24.29

Price range for 1,808-share sale $24.94–$24.96 Multiple transactions, weighted average $24.95

Key Terms

Rule 10b5-1 trading plan, weighted average price, open market or private transaction

3 terms

Rule 10b5-1 trading plan regulatory

"The sale was effected pursuant to a Rule 10b5-1 trading plan adopted"

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.

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.

open market or private transaction market

"Sale in open market or private transaction"

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 a total of 47,676 shares of Class A Common Stock on August 21, 2026 in open market or private transactions, all effected under a Rule 10b5-1 trading plan he adopted on May 22, 2026.

How many Fastly (FSLY) shares did the CFO sell in each reported transaction?

Richard Wong reported three sale transactions: 16,855 shares at a weighted average price of $23.64, 29,013 shares at a weighted average price of $24.29, and 1,808 shares at a weighted average price of $24.95, all on August 21, 2026.

What were the price ranges for the Fastly (FSLY) share sales by the CFO?

For 16,855 shares, trades occurred between $22.94 and $23.935. For 29,013 shares, trades occurred between $23.94 and $24.93. For 1,808 shares, trades occurred between $24.94 and $24.96. Reported prices are weighted averages over these ranges.

Were Fastly (FSLY) CFO Richard Wong’s sales made under a Rule 10b5-1 plan?

Yes. The filing states each sale “was effected pursuant to a Rule 10b5-1 trading plan” adopted by Richard Wong on May 22, 2026, and the filing’s Rule 10b5-1 checkbox is affirmed, indicating the trades followed that pre-arranged plan.

Did the Form 4 for Fastly (FSLY) disclose the CFO’s holdings after the sales?

No post-transaction share balance is provided in the reported rows; the Form 4 lists the shares sold and their prices but does not state a total number of Fastly shares held by Richard Wong after these transactions.

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

Form 4 Insider Transactions: What Each Field Means →

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Available on EDGAR 08/25/2026 - 05:07 PM EDT Accepted by SEC EDGAR 08/25/2026 - 05:06 PM EDT 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).

X

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)
08/21/2026

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	08/21/2026		S(1)		16,855	D	$23.64(2)	1,074,431	D
Class A Common Stock	08/21/2026		S(1)		29,013	D	$24.29(3)	1,045,418	D
Class A Common Stock	08/21/2026		S(1)		1,808	D	$24.95(4)	1,043,610	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 sale was effected pursuant to a Rule 10b5-1 trading plan adopted by the reporting person on May 22, 2026.

2. 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 $23.935, 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 ranges set forth in footnotes (2), (3) and (4) to this Form 4.

3. The price reported in Column 4 is a weighted average price. These shares were sold in multiple transactions at prices ranging from $23.94 to $24.93, inclusive.

4. The price reported in Column 4 is a weighted average price. These shares were sold in multiple transactions at prices ranging from $24.94 to $24.96, inclusive.

Remarks:

	/s/ Tara Seracka, Attorney-in-Fact	08/25/2026
	** 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)