Fastly (NYSE: FSLY) CTO Artur Bergman logs 40,000-share 10b5-1 sale

Rhea-AI Filing Summary

Fastly, Inc. director and Chief Technology Officer Artur Bergman reported a planned sale of 40,000 shares of Class A common stock on December 8, 2025. The sale, at a weighted average price of $10.66 per share, was carried out under a Rule 10b5-1 trading plan adopted on June 3, 2025. The filing notes that the shares were sold in multiple transactions at prices between $10.36 and $11.08.

After this transaction, Bergman beneficially owns 2,850,579 Fastly Class A shares directly. He also holds significant additional indirect interests through multiple trusts, including 2,500,558 shares in The Per Artur Bergman Revocable Trust and 840,005 shares in The Artur Bergman Remainder Trust One DTD 5/2/2019, among other remainder and grantor retained annuity trusts where he serves as trustee or investment advisor.

SEC Form 4

FORM 4

UNITED STATES SECURITIES AND EXCHANGE COMMISSION
Washington, D.C. 20549

STATEMENT OF CHANGES IN BENEFICIAL OWNERSHIP

Filed pursuant to Section 16(a) of the Securities Exchange Act of 1934
or Section 30(h) of the Investment Company Act of 1940

OMB APPROVAL

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Check this box if no longer subject to Section 16. Form 4 or Form 5 obligations may continue. See Instruction 1(b).

X

Check this box to indicate that a 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). See Instruction 10.

1. Name and Address of Reporting Person^*

Bergman Artur

(Last) (First) (Middle)

C/O FASTLY, INC.

475 BRANNAN STREET, SUITE 300

(Street)

SAN FRANCISCO CA 94107

(City) (State) (Zip)

2. Issuer Name and Ticker or Trading Symbol
Fastly, Inc. [ FSLY ]

5. Relationship of Reporting Person(s) to Issuer
(Check all applicable)

X	Director		10% Owner
X	Officer (give title below)		Other (specify below)
	Chief Technology Officer

3. Date of Earliest Transaction (Month/Day/Year)
12/08/2025

4. If Amendment, Date of Original Filed (Month/Day/Year)

6. Individual or Joint/Group Filing (Check Applicable Line)

X	Form filed by One Reporting Person
	Form filed by More than One Reporting Person

Table I - Non-Derivative Securities Acquired, Disposed of, or Beneficially Owned
1. Title of Security (Instr. 3)	2. Transaction Date (Month/Day/Year)	2A. Deemed Execution Date, if any (Month/Day/Year)	3. Transaction Code (Instr. 8)		4. Securities Acquired (A) or Disposed Of (D) (Instr. 3, 4 and 5)			5. Amount of Securities Beneficially Owned Following Reported Transaction(s) (Instr. 3 and 4)	6. Ownership Form: Direct (D) or Indirect (I) (Instr. 4)	7. Nature of Indirect Beneficial Ownership (Instr. 4)
			Code	V	Amount	(A) or (D)	Price
Class A Common Stock	12/08/2025		S(1)		40,000(2)	D	$10.66(3)	2,850,579	D
Class A Common Stock								2,500,558	I	See Foonote(4)
Class A Common Stock								840,005	I	See Footnote(5)
Class A Common Stock								109,686	I	See Footnote(6)
Class A Common Stock								50,481	I	See Footnote(7)
Class A Common Stock								792,998	I	See Footnote(8)
Class A Common Stock								156,521	I	See Footnote(9)

Table II - Derivative Securities Acquired, Disposed of, or Beneficially Owned (e.g., puts, calls, warrants, options, convertible securities)
1. Title of Derivative Security (Instr. 3)	2. Conversion or Exercise Price of Derivative Security	3. Transaction Date (Month/Day/Year)	3A. Deemed Execution Date, if any (Month/Day/Year)	4. Transaction Code (Instr. 8)		5. Number of Derivative Securities Acquired (A) or Disposed of (D) (Instr. 3, 4 and 5)		6. Date Exercisable and Expiration Date (Month/Day/Year)		7. Title and Amount of Securities Underlying Derivative Security (Instr. 3 and 4)		8. Price of Derivative Security (Instr. 5)	9. Number of derivative Securities Beneficially Owned Following Reported Transaction(s) (Instr. 4)	10. Ownership Form: Direct (D) or Indirect (I) (Instr. 4)	11. Nature of Indirect Beneficial Ownership (Instr. 4)
				Code	V	(A)	(D)	Date Exercisable	Expiration Date	Title	Amount or Number of Shares

Explanation of Responses:

1. The sale was effected pursuant to a Rule 10b5-1 trading plan adopted by the reporting person on June 3, 2025.

2. The shares were sold by the Per Artur Bergman Revocable Trust, to which the reporting person contributed 40,000 shares of common stock of the Issuer in a transaction that resulted in a change in the form of beneficial ownership from direct to indirect.

3. The price reported in Column 4 is a weighted average price. These shares were sold in multiple transactions at prices ranging from $10.36 to $11.08. 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 (3) to this Form 4.

4. The shares are held by The Per Artur Bergman Revocable Trust, of which the reporting person is settlor, sole trustee, and sole beneficiary.

5. The shares are held by The Artur Bergman Remainder Trust One DTD 5/2/2019, of which the reporting person is the investment advisor.

6. The shares are held by The Artur Bergman Remainder Trust Three DTD 5/2/2019, of which the reporting person is the investment advisor.

7. The shares are held by The Per Artur Bergman Grantor Retained Annuity Trust No. 3, of which the reporting person is trustee.

8. The shares are held by The Per Artur Bergman Grantor Retained Annuity Trust No. 4, of which the reporting person is trustee.

9. The shares are held by The PAB 2021 Remainder Trust, of which the reporting person is the investment advisor.

Remarks:

	/s/ Tara Seracka, Attorney-in-Fact	12/10/2025
	** Signature of Reporting Person	Date
Reminder: Report on a separate line for each class of securities beneficially owned directly or indirectly.
* If the form is filed by more than one reporting person, see Instruction 4 (b)(v).
** Intentional misstatements or omissions of facts constitute Federal Criminal Violations See 18 U.S.C. 1001 and 15 U.S.C. 78ff(a).
Note: File three copies of this Form, one of which must be manually signed. If space is insufficient, see Instruction 6 for procedure.
Persons who respond to the collection of information contained in this form are not required to respond unless the form displays a currently valid OMB Number.

FAQ

What insider transaction did Fastly (FSLY) report for Artur Bergman?

Fastly reported that director and Chief Technology Officer Artur Bergman was involved in the sale of 40,000 shares of Class A common stock on December 8, 2025.

At what prices were Artur Bergmans Fastly (FSLY) shares sold?

The filing states a weighted average sale price of $10.66 per share, with individual transactions executed at prices ranging from $10.36 to $11.08.

Was the Fastly (FSLY) insider sale under a Rule 10b5-1 trading plan?

Yes. The sale was effected under a Rule 10b5-1 trading plan that Artur Bergman adopted on June 3, 2025.

How many Fastly (FSLY) shares does Artur Bergman still own directly after the sale?

Following the reported transaction, Artur Bergman directly beneficially owns 2,850,579 shares of Fastly Class A common stock.

What indirect Fastly (FSLY) holdings does Artur Bergman report through trusts?

Indirectly, Bergman reports holdings including 2,500,558 shares in The Per Artur Bergman Revocable Trust and 840,005 shares in The Artur Bergman Remainder Trust One DTD 5/2/2019, plus additional blocks in other remainder and grantor retained annuity trusts.

What is Artur Bergmans relationship to Fastly (FSLY)?

Artur Bergman is reported as both a director of Fastly, Inc. and an officer, serving as the companys Chief Technology Officer.