SEC Form 4 · accession 0001517413-26-000296

Fastly, Inc. · FSLY

Statement of changes in beneficial ownership, as filed. Original on EDGAR ↗

Reporting owner

Artur Bergman

Officer — Chief Technology Officer · Director

Period of report

Sep 21, 2026

Accepted (ET)

Sep 23, 2026 · 4:38 pm EDT

Rule 10b5-1 plan

yes — trade under a plan

Issuer CIK

0001517413

Table I — non-derivative securities

Security	Date	Code	Shares	Price	A/D	Owned after	D/I	Nature of ownership
Class A Common Stock^F2,F3	Sep 21, 2026	S	2,400	$25.32	D	1,592,606	I	See Footnote.
Class A Common Stock^F4,F3	Sep 21, 2026	S	1,100	$26.62	D	1,591,506	I	See Footnote.
Class A Common Stock^F5,F3	Sep 21, 2026	S	45,646	$27.51	D	1,545,860	I	See Footnote.
Class A Common Stock^F6,F3	Sep 22, 2026	S	27,900	$27.82	D	1,517,960	I	See Footnote.
Class A Common Stock	holding	—	—		—	1,896,249	D
Class A Common Stock^F7	holding	—	—		—	840,005	I	See Footnote
Class A Common Stock^F8	holding	—	—		—	109,686	I	See Footnote
Class A Common Stock^F9	holding	—	—		—	156,521	I	See Footnote
Class A Common Stock^F10	holding	—	—		—	588,671	I	See Footnote
Class A Common Stock^F11	holding	—	—		—	254,808	I	See Footnote

Table II — derivative securities

No Table II lines on this filing.

Explanation of responses

F1The sale was effected pursuant to a Rule 10b5-1 trading plan adopted by the reporting person on June 4, 2026.
F10The shares are held by The Per Artur Bergman Grantor Retained Annuity Trust No. 4, of which the reporting person is trustee.
F11The shares are held by The Per Artur Bergman Grantor Retained Annuity Trust No. 5, of which the reporting person is trustee.
F2The price reported in Column 4 is a weighted average price. These shares were sold in multiple transactions at prices ranging from $25.00 to $25.71, 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), (4), (5) and (6) to this Form 4.
F3The shares are held by The Per Artur Bergman Revocable Trust, of which the reporting person is settlor, sole trustee, and sole beneficiary.
F4The price reported in Column 4 is a weighted average price. These shares were sold in multiple transactions at prices ranging from $26.03 to $26.98, inclusive.
F5The price reported in Column 4 is a weighted average price. These shares were sold in multiple transactions at prices ranging from $27.04 to $27.99, inclusive.
F6The price reported in Column 4 is a weighted average price. These shares were sold in multiple transactions at prices ranging from $27.50 to $28.46, inclusive.
F7The shares are held by The Artur Bergman Remainder Trust One DTD 5/2/2019, of which the reporting person is the investment advisor.
F8The shares are held by The Artur Bergman Remainder Trust Three DTD 5/2/2019, of which the reporting person is the investment advisor.
F9The shares are held by The PAB 2021 Remainder Trust, of which the reporting person is the investment advisor.