Fastly CEO sells 18,485 shares of company stock

Fastly, Inc. CEO Charles Lacey Compton III reported selling a total of 18,485 shares of Class A Common Stock on July 16–17, 2026.

Rhea-AI Filing Summary

Fastly, Inc. CEO Charles Lacey Compton III reported selling a total of 18,485 shares of Class A Common Stock on July 16–17, 2026. This included 11,412 shares sold at $20.65 per share to satisfy tax obligations related to vesting Restricted Stock Units, plus three additional sales on July 17 at prices of $20.51, $21.10 and $21.90 per share. The $20.51 and $21.10 prices are weighted averages for trades ranging from $19.76 to $20.73 and $20.77 to $21.76 per share, executed under a Rule 10b5-1 trading plan adopted on August 27, 2025.

Insider Trade Summary 10b5-1

Net Seller: 18,485 shares

Net Sell 4 txns

Insider Compton Charles Lacey III

Role CEO

Sold 18,485 shs ($383K)

Type	Security	Shares	Price	Value
Sale	Class A Common Stock F2, F3	2,714	$20.51	$56K
Sale	Class A Common Stock F2, F4	4,204	$21.10	$89K
Sale	Class A Common Stock F2	155	$21.90	$3K
Sale	Class A Common Stock F1	11,412	$20.65	$236K

Holdings After Transaction: Class A Common Stock — 1,045,460 shares (Direct)

Footnotes (4)

1. F1. Shares sold to satisfy tax obligations in connection with the vesting of previously granted Restricted Stock Units.
2. F2. The sales reported in this Form 4 were effected pursuant to a Rule 10b5-1 trading plan adopted by the reporting person on August 27, 2025.
3. F3. The price reported in Column 4 is a weighted average price. These shares were sold in multiple transactions at prices ranging from $19.76 to $20.73, 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 (3) and (4) to this Form 4.
4. F4. The price reported in Column 4 is a weighted average price. These shares were sold in multiple transactions at prices ranging from $20.77 to $21.76, inclusive.

Key Figures

Total shares sold: 18,485 shares Tax-related sale: 11,412 shares July 16 sale price: $20.6500 per share +3 more

6 metrics

Total shares sold 18,485 shares Aggregate Class A Common Stock sales reported for July 16–17, 2026

Tax-related sale 11,412 shares Shares sold on July 16, 2026 to satisfy tax obligations from vesting Restricted Stock Units

July 16 sale price $20.6500 per share Per-share sale price for 11,412-share transaction on July 16, 2026

July 17 sale prices $20.5100, $21.1000, $21.9000 per share Per-share prices for three transactions on July 17, 2026

Price range for $20.51 sale $19.76–$20.73 per share Individual trade prices underlying weighted average $20.5100 sale on July 17, 2026

Price range for $21.10 sale $20.77–$21.76 per share Individual trade prices underlying weighted average $21.1000 sale on July 17, 2026

Key Terms

Rule 10b5-1 trading plan, Restricted Stock Units, weighted average price, Class A Common Stock

4 terms

Rule 10b5-1 trading plan regulatory

"The sales reported were effected pursuant to a Rule 10b5-1 trading plan adopted on August 27, 2025."

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.

Restricted Stock Units financial

"Shares sold to satisfy tax obligations in connection with the 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 market

"Security title reported as Class A Common Stock in each transaction."

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 stock activity did Fastly (FSLY) report in this Form 4?

Fastly CEO Charles Lacey Compton III reported selling 18,485 shares of Class A Common Stock on July 16–17, 2026, across four transactions. One sale covered tax obligations and three were open market or private transactions, some under a Rule 10b5-1 plan.

How many Fastly (FSLY) shares did the CEO sell to cover taxes?

The CEO sold 11,412 shares of Fastly Class A Common Stock on July 16, 2026 to satisfy tax obligations arising from the vesting of previously granted Restricted Stock Units, at a per‑share price of $20.65, according to the Form 4 disclosure.

What prices did the Fastly (FSLY) CEO receive for the July 17, 2026 share sales?

On July 17, 2026, the CEO sold shares at prices of $20.51, $21.10 and $21.90 per share. The $20.51 and $21.10 amounts are weighted averages from trades ranging between $19.76–$20.73 and $20.77–$21.76, respectively.

Were the Fastly (FSLY) CEO’s July 17, 2026 sales under a Rule 10b5-1 plan?

Yes. The Form 4 states that the July 17, 2026 sales were effected under a Rule 10b5-1 trading plan adopted by the CEO on August 27, 2025, indicating those transactions followed a pre‑established trading schedule.

What is the total number of Fastly (FSLY) shares sold in this Form 4 filing?

Across all reported transactions, the Fastly CEO sold 18,485 shares of Class A Common Stock. This total includes both the 11,412 tax-related shares sold on July 16, 2026 and an additional 7,073 shares sold in three transactions on July 17, 2026.

How does the Form 4 describe the pricing of some Fastly (FSLY) share sales?

For two July 17, 2026 sales, the Form 4 reports a weighted average price. Individual trades for the $20.51 sale ranged from $19.76–$20.73, and for the $21.10 sale ranged from $20.77–$21.76 per share.

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

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Accepted by SEC EDGAR 07/20/2026 - 05:01 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^*

Compton Charles Lacey III

(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)

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

2a. Foreign Trading Symbol

3. Date of Earliest Transaction (Month/Day/Year)
07/16/2026

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	07/16/2026		S(1)		11,412	D	$20.65	1,052,533	D
Class A Common Stock	07/17/2026		S(2)		2,714	D	$20.51(3)	1,049,819	D
Class A Common Stock	07/17/2026		S(2)		4,204	D	$21.1(4)	1,045,615	D
Class A Common Stock	07/17/2026		S(2)		155	D	$21.9	1,045,460	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 sales reported in this Form 4 were effected pursuant to a Rule 10b5-1 trading plan adopted by the reporting person on August 27, 2025.

3. The price reported in Column 4 is a weighted average price. These shares were sold in multiple transactions at prices ranging from $19.76 to $20.73, 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 (3) and (4) to this Form 4.

4. The price reported in Column 4 is a weighted average price. These shares were sold in multiple transactions at prices ranging from $20.77 to $21.76, inclusive.

Remarks:

	/s/ Tara Seracka, Attorney-in-Fact	07/20/2026
	** 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)