Fastly CEO sells 11,433 and 9,016 shares in October

The October 16 sale was connected with restricted-stock-unit vesting; the October 19 sale followed a Rule 10b5-1 plan adopted May 11, 2026.

Rhea-AI Filing Summary

Fastly, Inc. (FSLY) CEO and director Charles Lacey Compton III reported two direct share sales. On October 16, 2026, 11,433 shares were sold at a weighted average price of $24.90 to satisfy tax obligations connected with vesting of previously granted Restricted Stock Units. On October 19, 2026, 9,016 shares were sold at a weighted average price of $23.08 under a Rule 10b5-1 trading plan adopted May 11, 2026.

Insider Trade Summary 10b5-1

Net Seller: 20,449 shares

Net Sell 2 txns

Insider Compton Charles Lacey III

Role CEO

Sold 20,449 shs ($493K)

Type	Security	Shares	Price	Value
Sale	Class A Common Stock F3, F4	9,016	$23.08	$208K
Sale	Class A Common Stock F1, F2	11,433	$24.90	$285K

Holdings After Transaction: Class A Common Stock — 831,500 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 price reported in Column 4 is a weighted average price. These shares were sold in multiple transactions at prices ranging from $24.67 to $24.90, 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) and (4) to this Form 4.
3. F3. The sale was effected pursuant to a Rule 10b5-1 trading plan adopted by the reporting person on May 11, 2026.
4. F4. The price reported in Column 4 is a weighted average price. These shares were sold in multiple transactions at prices ranging from $22.79 to $23.43, inclusive.

Key Figures

Shares sold: 11,433 shares Weighted average sale price: $24.90 per share Reported sale price range: $24.67 to $24.90 per share +3 more

6 metrics

Shares sold 11,433 shares Direct sale on October 16, 2026, connected with tax obligations from Restricted Stock Unit vesting

Weighted average sale price $24.90 per share Direct sale on October 16, 2026

Reported sale price range $24.67 to $24.90 per share Multiple transactions on October 16, 2026; inclusive

Shares sold 9,016 shares Direct sale on October 19, 2026

Weighted average sale price $23.08 per share Direct sale on October 19, 2026

Reported sale price range $22.79 to $23.43 per share Multiple transactions on October 19, 2026; inclusive

Key Terms

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

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.

Rule 10b5-1 trading plan regulatory

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

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

"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.

FAQ

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

How many FSLY shares did CEO Charles Lacey Compton III sell?

He reported a direct sale of 11,433 shares on October 16, 2026, at a weighted average price of $24.90, and a direct sale of 9,016 shares on October 19, 2026, at a weighted average price of $23.08.

What price ranges were reported for the FSLY share sales?

The October 16 sale was reported at prices from $24.67 to $24.90, inclusive, across multiple transactions. The October 19 sale was reported at prices from $22.79 to $23.43, inclusive.

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

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Available on EDGAR 10/20/2026 - 05:00 PM EDT Accepted by SEC EDGAR 10/20/2026 - 05:00 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)
10/16/2026

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	10/16/2026		S(1)		11,433	D	$24.9(2)	840,516	D
Class A Common Stock	10/19/2026		S(3)		9,016	D	$23.08(4)	831,500	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 $24.67 to $24.90, 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) and (4) to this Form 4.

3. The sale was effected pursuant to a Rule 10b5-1 trading plan adopted by the reporting person on May 11, 2026.

4. The price reported in Column 4 is a weighted average price. These shares were sold in multiple transactions at prices ranging from $22.79 to $23.43, inclusive.

Remarks:

	/s/ Tara Seracka, Attorney-in-Fact	10/20/2026
	** 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)