Notice of Proposed Sale · 144

Fastly, Inc.

FSLYNASDAQEQUITYCurrent

Notice of Proposed Sale

Filed Aug 31, 2026Accepted Aug 31, 2026, 10:11 AM EDTFiling CIK 1189229Accession 0001959173-26-006533

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Structured filing — 144

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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: 415-525-3481
Person for whose account securities are to be sold: PAISLEY CHRISTOPHER B
Relationships to issuer: Director
Street: 475 BRANNAN
Street (continued): 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
Class A	3,000	69,000.00	159,300,000	08/31/2026	NASDAQ	Fidelity Brokerage Services LLC

Broker / market maker — proposed row 1, entry 1

Name: Fidelity Brokerage Services LLC
Street: 900 Salem Street
City: Smithfield
State / country code: RI
Postal code: 02917

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
Class A	06/15/2023	Restricted Stock Vesting	Issuer	3,000	N	06/15/2023	Compensation

Prior-sale reporting

Nothing to report for the preceding three months: Y

Remarks

Today's sale occurred in the Paisley Living Trust of which Christopher B. Paisley is a trustee.

Notice signature

Notice date: 08/31/2026
Signed: /s/ Jennifer Ruchti, as a duly authorized representative of Fidelity Brokerage Services LLC, as attorney-in-fact for Christopher B. Paisley
Plan adoption dates: 02/26/2026

Company context

Fastly’s (Nasdaq: FSLY) 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 a 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 www.fastly.com, and follow us @fastly.

Current securities

FSLYNASDAQ · EQUITY · Current

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