Charles Lacey Compton III - 28 Feb 2026 Form 4 Insider Report for Fastly, Inc. (FSLY)

Role: CEO, Director
Signature: /s/ Tara Seracka, Attorney-in-Fact
Issuer symbol: FSLY
Transactions as of: 28 Feb 2026
Net transactions value: $0
Form type: 4
Filing time: 03 Mar 2026, 16:42:47 UTC
Previous filing: 23 Feb 2026
Next filing: 04 Mar 2026
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	03 Mar 2026	0002074428

Transactions Table

Type	Sym	Class	Transaction	Value $	Shares	Change %	* Price $	Shares After	Date	Ownership	Footnotes
transaction	FSLY	Class A Common Stock	Award	$0	+27,226	+4.7%	$0.000000	611,745	28 Feb 2026	Direct	F1
transaction	FSLY	Class A Common Stock	Award	$0	+87,259	+14%	$0.000000	699,004	28 Feb 2026	Direct	F2
transaction	FSLY	Class A Common Stock	Award	$0	+263,277	+38%	$0.000000	962,281	28 Feb 2026	Direct	F2

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

Explanation of Responses:

Id	Content
F1	Fully vested. Under the 2025 Bonus Plan, subject to meeting performance criteria, the reporting person was eligible to receive a bonus to be paid in the form of fully-vested restricted stock units.
F2	Represents the shares subject to performance-based restricted stock unit awards (PRSUs) earned based on the achievement of pre-established performance goals during the Issuer's fiscal year 2025. 33% of the number of PRSUs vested on the Transaction Date, and 8.375% of the PRSUs will vest in quarterly installments thereafter on May 28, August 28, November 28, and February 28, subject to the Reporting Person's continued service with the Issuer through each applicable vesting date.

Content

Fully vested. Under the 2025 Bonus Plan, subject to meeting performance criteria, the reporting person was eligible to receive a bonus to be paid in the form of fully-vested restricted stock units.

Represents the shares subject to performance-based restricted stock unit awards (PRSUs) earned based on the achievement of pre-established performance goals during the Issuer's fiscal year 2025. 33% of the number of PRSUs vested on the Transaction Date, and 8.375% of the PRSUs will vest in quarterly installments thereafter on May 28, August 28, November 28, and February 28, subject to the Reporting Person's continued service with the Issuer through each applicable vesting date.