Charles Lacey Compton III - 26 Nov 2025 Form 4 Insider Report for Fastly, Inc. (FSLY)

Role: CEO, Director
Signature: /s/ Tara Seracka, Attorney-in-Fact
Issuer symbol: FSLY
Transactions as of: 26 Nov 2025
Transactions value $: -$176,190
Form type: 4
Filing time: 01 Dec 2025, 16:11:04 UTC
Previous filing: 20 Nov 2025
SEC: View on sec.gov

Reporting Owners (1)

Name	Relationship	Address	Signature	Signature date	CIK
Compton Charles Lacey III	CEO, Director	C/O FASTLY, INC., 475 BRANNAN STREET, SUITE 300, SAN FRANCISCO	/s/ Tara Seracka, Attorney-in-Fact	01 Dec 2025	0002074428

Transactions Table

Type	Sym	Class	Transaction	Value $	Shares	Change %	* Price $	Shares After	Date	Ownership	Footnotes
transaction	FSLY	Class A Common Stock	Sale	-$176K	-14.9K	-2.33%	$11.79	626K	26 Nov 2025	Direct	F1, F2

* An asterisk sign (*) next to the price indicates that the price is likely invalid.

Buy Plan / Sale Plan: These are also open market purchases/sales of shares, but in this case the transaction is part of a trading plan. Rule 10b5-1 allows insiders to setup a trading plan to buy/sell stocks over a certain period of time. Since the purchases/sales are predetermined, this protects the insiders from violating insider trading law.

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).

Explanation of Responses:

Id	Content
F1	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.
F2	The price reported in Column 4 is a weighted average price. These shares were sold in multiple transactions at prices ranging from $11.43 to $12.25. 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.

Content

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.

The price reported in Column 4 is a weighted average price. These shares were sold in multiple transactions at prices ranging from $11.43 to $12.25. 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.