[Form 4] Fastly, Inc. Insider Trading Activity

Rhea-AI Filing Summary

Fastly, Inc. (FSLY) director and Chief Technology Officer Per Artur Bergman reported sales of Class A common stock on 11/17/2025 under a pre-arranged Rule 10b5-1 trading plan. The filing shows two open-market sales: 39,000 shares at a weighted average price of $10.75 and 1,000 shares at a weighted average price of $11.43, executed in multiple trades within stated price ranges.

After these transactions, Bergman directly beneficially owns 3,038,558 Class A shares and also reports indirect ownership through several trusts. The Per Artur Bergman Revocable Trust holds 2,500,558 shares, while additional trusts collectively hold several hundred thousand more shares, reflecting a substantial ongoing economic interest in Fastly.

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

OMB Number:			3235-0287
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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)
11/17/2025

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	11/17/2025		S(1)		39,000(2)	D	$10.75(3)	3,039,558	D
Class A Common Stock	11/17/2025		S(1)		1,000(2)	D	$11.43(4)	3,038,558	D
Class A Common Stock								2,500,558	I	See Foonote(5)
Class A Common Stock								840,005	I	See Footnote(6)
Class A Common Stock								109,686	I	See Footnote(7)
Class A Common Stock								50,481	I	See Footnote(8)
Class A Common Stock								792,998	I	See Footnote(9)
Class A Common Stock								156,521	I	See Footnote(10)

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 $10.40 to $11.39. 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 (3) and (4) to this Form 4.

4. The price reported in Column 4 is a weighted average price. These shares were sold in multiple transactions at prices ranging from $11.40 to $11.48, inclusive.

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

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

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

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

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

10. 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	11/19/2025
	** 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 did Fastly (FSLY) disclose in this Form 4 filing?

The filing reports that Per Artur Bergman, Fastly's director and Chief Technology Officer, sold shares of Class A common stock and updated his direct and indirect beneficial ownership positions.

How many Fastly (FSLY) shares did Artur Bergman sell and at what prices?

Bergman reported selling 39,000 shares at a weighted average price of $10.75 per share and 1,000 shares at a weighted average price of $11.43 per share, both on 11/17/2025.

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

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

How many Fastly (FSLY) shares does Artur Bergman own after the reported transactions?

After the reported trades, Bergman directly beneficially owns 3,038,558 Class A shares and indirectly owns additional shares through several trusts, including 2,500,558 shares held by The Per Artur Bergman Revocable Trust.

What are the indirect ownership arrangements reported for Fastly (FSLY) shares?

Indirect holdings include shares in The Per Artur Bergman Revocable Trust and multiple remainder and grantor retained annuity trusts where Bergman serves as settlor, trustee, sole beneficiary, or investment advisor as specified in the footnotes.

How were the Fastly (FSLY) share sale prices calculated in the Form 4?

The filing notes that the prices in Column 4 are weighted average prices, with the 39,000 shares sold in transactions ranging from $10.40 to $11.39 and the 1,000 shares sold in transactions ranging from $11.40 to $11.48.