Fastly (FSLY) insider details Rule 10b5-1 stock sale and holdings

Rhea-AI Filing Summary

Fastly, Inc. disclosed that its chief technology officer and director reported an insider sale of Class A common stock. On 12/15/2025, the reporting person, through The Per Artur Bergman Revocable Trust, sold 40,000 shares in a transaction coded "S" at a weighted average price of $10.50, with individual trades occurring between $10.26 and $10.70. The sale was made under a pre-arranged Rule 10b5-1 trading plan adopted on June 3, 2025.

After this transaction, the reporting person beneficially owned 2,810,579 shares directly. Additional indirect holdings were reported through several trusts, including 2,500,558 shares held by The Per Artur Bergman Revocable Trust and other trusts with positions such as 840,005 and 792,998 shares. No derivative securities transactions were reported in this filing.

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)
12/15/2025

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	12/15/2025		S(1)		40,000(2)	D	$10.5(3)	2,810,579	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 $10.26 to $10.70. 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	12/17/2025
	** 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 in this Form 4?

The filing reports that Fastly's chief technology officer and director, as the reporting person, sold 40,000 shares of Class A common stock on 12/15/2025 in a transaction coded "S" (sale).

At what price were the Fastly (FSLY) shares sold by the insider?

The filing shows a weighted average sale price of $10.50 per share, with multiple trades executed at prices ranging from $10.26 to $10.70.

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

Yes. The sale was effected pursuant to a Rule 10b5-1 trading plan that the reporting person adopted on June 3, 2025, as noted in the explanation of responses.

How many Fastly (FSLY) shares does the insider report owning after the sale?

Following the reported transaction, the filing shows 2,810,579 Fastly Class A shares beneficially owned directly by the reporting person, plus additional indirect holdings through several trusts.

What trusts are listed as holding Fastly (FSLY) shares for the reporting person?

Indirect holdings include shares held by The Per Artur Bergman Revocable Trust, The Artur Bergman Remainder Trust One DTD 5/2/2019, The Artur Bergman Remainder Trust Three DTD 5/2/2019, two Per Artur Bergman Grantor Retained Annuity Trusts, and The PAB 2021 Remainder Trust.

Does this Fastly (FSLY) Form 4 report any derivative securities?

No. The section for derivative securities is present, but no derivative transactions or holdings are filled in for this reporting period.

What is the reporting person’s role at Fastly (FSLY)?

The reporting person is identified as both a director and an officer of Fastly, serving as the company’s Chief Technology Officer.