Notice of Proposed Sale · 144

Fastly, Inc.

FSLYNASDAQEQUITYCurrent

Notice of Proposed Sale

Filed Sep 28, 2026Accepted Sep 28, 2026, 4:21 PM EDTFiling CIK 1769490Accession 0001950047-26-009848

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Notice of proposed sale. The proposed amounts below do not establish that a sale occurred.

Proposed-sale notice

Issuer: FASTLY, INC.
Issuer CIK: 0001517413
SEC file number: 001-38897
Phone: 8444327859
Person for whose account securities are to be sold: The Per Artur Bergman Revocable Trust
Relationships to issuer: Director · Officer
Street: 475 Brannan Street, Suite 300
City: San Francisco
State / country code: CA
Postal code: 94107

Securities proposed for sale

Securities proposed for sale · 1 reported row
Security	Proposed units	Aggregate market value	Units outstanding	Approximate sale date	Exchange	Broker / market maker
Common	111,116	2,773,455.36	159,300,000	09/28/2026	NASDAQ	Morgan Stanley Smith Barney LLC Executive Financial Services

Broker / market maker — proposed row 1, entry 1

Name: Morgan Stanley Smith Barney LLC Executive Financial Services
Street: 1 New York Plaza
Street (continued): 8th Floor
City: New York
State / country code: NY
Postal code: 10004

Acquisition of securities to be sold

Acquisition of securities to be sold · 1 reported row
Security	Acquired	Nature of acquisition	Acquired from	Amount acquired	Gift transaction	Payment date	Nature of payment
Common	03/10/2011	Founders Shares	Issuer	111,116	N	03/10/2011	N/A

Sales reported in the preceding three months

Sales reported in the preceding three months · 13 reported rows
Seller	Security	Sale date	Amount sold	Gross proceeds
10b5-1 Sales for THE PER ARTUR BERGMAN REVOCABLE TRUST	Common	09/23/2026	379,602	11,447,217.93
10b5-1 Sales for THE PER ARTUR BERGMAN REVOCABLE TRUST	Common	09/22/2026	27,900	776,088.72
10b5-1 Sales for THE PER ARTUR BERGMAN REVOCABLE TRUST	Common	09/21/2026	49,146	1,345,670.47
10b5-1 Sales for THE PER ARTUR BERGMAN REVOCABLE TRUST	Common	09/17/2026	2,200	55,661.98
10b5-1 Sales for THE PER ARTUR BERGMAN REVOCABLE TRUST	Common	09/15/2026	2,500	62,846.26
10b5-1 Sales for THE PER ARTUR BERGMAN REVOCABLE TRUST	Common	09/14/2026	31,079	762,373.64
10b5-1 Sales for THE PER ARTUR BERGMAN REVOCABLE TRUST	Common	09/09/2026	8,960	203,641.98
10b5-1 Sales for THE PER ARTUR BERGMAN REVOCABLE TRUST	Common	09/08/2026	300	6,752.01
10b5-1 Sales for THE PER ARTUR BERGMAN REVOCABLE TRUST	Common	09/03/2026	36,095	750,302.99
PER ARTUR BERGMAN	Common	08/31/2026	6,225	143,175.00
PER ARTUR BERGMAN	Common	08/27/2026	851	20,492.08
10b5-1 Sales for THE PER ARTUR BERGMAN REVOCABLE TRUST	Common	08/19/2026	31,687	783,350.17
PER ARTUR BERGMAN	Common	08/18/2026	32,387	926,268.20

Seller — prior-sale row 1, entry 1

Name: 10b5-1 Sales for THE PER ARTUR BERGMAN REVOCABLE TRUST
Street: 475 Brannan Street, Suite 300
City: San Francisco
State / country code: CA
Postal code: 94107

Seller — prior-sale row 2, entry 1

Name: 10b5-1 Sales for THE PER ARTUR BERGMAN REVOCABLE TRUST
Street: 475 Brannan Street, Suite 300
City: San Francisco
State / country code: CA
Postal code: 94107

Seller — prior-sale row 3, entry 1

Name: 10b5-1 Sales for THE PER ARTUR BERGMAN REVOCABLE TRUST
Street: 475 Brannan Street, Suite 300
City: San Francisco
State / country code: CA
Postal code: 94107

Seller — prior-sale row 4, entry 1

Name: 10b5-1 Sales for THE PER ARTUR BERGMAN REVOCABLE TRUST
Street: 475 Brannan Street, Suite 300
City: San Francisco
State / country code: CA
Postal code: 94107

Seller — prior-sale row 5, entry 1

Name: 10b5-1 Sales for THE PER ARTUR BERGMAN REVOCABLE TRUST
Street: 475 Brannan Street, Suite 300
City: San Francisco
State / country code: CA
Postal code: 94107

Seller — prior-sale row 6, entry 1

Name: 10b5-1 Sales for THE PER ARTUR BERGMAN REVOCABLE TRUST
Street: 475 Brannan Street, Suite 300
City: San Francisco
State / country code: CA
Postal code: 94107

Seller — prior-sale row 7, entry 1

Name: 10b5-1 Sales for THE PER ARTUR BERGMAN REVOCABLE TRUST
Street: 475 Brannan Street, Suite 300
City: San Francisco
State / country code: CA
Postal code: 94107

Seller — prior-sale row 8, entry 1

Name: 10b5-1 Sales for THE PER ARTUR BERGMAN REVOCABLE TRUST
Street: 475 Brannan Street, Suite 300
City: San Francisco
State / country code: CA
Postal code: 94107

Seller — prior-sale row 9, entry 1

Name: 10b5-1 Sales for THE PER ARTUR BERGMAN REVOCABLE TRUST
Street: 475 Brannan Street, Suite 300
City: San Francisco
State / country code: CA
Postal code: 94107

Seller — prior-sale row 10, entry 1

Name: PER ARTUR BERGMAN
Street: 475 Brannan Street, Suite 300
City: San Francisco
State / country code: CA
Postal code: 94107

Seller — prior-sale row 11, entry 1

Name: PER ARTUR BERGMAN
Street: 475 Brannan Street, Suite 300
City: San Francisco
State / country code: CA
Postal code: 94107

Seller — prior-sale row 12, entry 1

Name: 10b5-1 Sales for THE PER ARTUR BERGMAN REVOCABLE TRUST
Street: 475 Brannan Street, Suite 300
City: San Francisco
State / country code: CA
Postal code: 94107

Seller — prior-sale row 13, entry 1

Name: PER ARTUR BERGMAN
Street: 475 Brannan Street, Suite 300
City: San Francisco
State / country code: CA
Postal code: 94107

Prior-sale reporting

Nothing to report for the preceding three months: N

Notice signature

Notice date: 09/28/2026
Signed: /s/ Artur Bergman
Plan adoption dates: 06/04/2026

Company context

Fastly’s powerful and programmable edge cloud platform helps the world’s top brands deliver online experiences that are fast, safe, and engaging through edge compute, delivery, security, and observability offerings that improve site performance, enhance security, and empower innovation at global scale. Compared to other providers, Fastly’s powerful, high-performance, and modern platform architecture empowers developers to deliver secure websites and apps with rapid time-to-market and demonstrated, industry-leading cost savings. Organizations around the world trust Fastly to help them upgrade the internet experience, including Reddit, Universal Music Group, and SeatGeek. Learn more about Fastly at https://www.fastly.com, and follow us @fastly.

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