[Form 4] Fastly, Inc. Insider Trading Activity

Rhea-AI Filing Summary

Artur Bergman, Fastly, Inc. CTO and Director, reported sales of Class A common stock on 08/18/2025 and 08/19/2025. On 08/18/2025 he sold 26,418 shares at a weighted-average price of $6.88 to satisfy tax obligations from RSU vesting. On 08/19/2025 he sold 19,353 shares pursuant to a Rule 10b5-1 trading plan adopted June 3, 2024, at a weighted-average price of $7.33. Reported direct beneficial ownership was 3,599,616 shares after the 08/18 sale and 3,580,263 after the 08/19 sale. He also reports multiple indirect holdings through trusts totaling specific positions (for example, 2,500,558, 840,005, 109,686, 50,481, 792,998, and 156,521 shares) as described in footnotes.

Positive

• Sales disclosed with stated purpose: 08/18 sale explicitly for RSU tax withholding, improving transparency
• Use of 10b5-1 plan for the 08/19 sale indicates pre-arranged trading and reduces appearance of opportunistic timing
• Detailed indirect ownership disclosure via multiple trusts clarifies economic exposure and reporting person roles

Negative

• None.

Insights

Securities Analyst

TL;DR: Insider sales were small relative to total reported holdings and were executed for tax withholding and under a 10b5-1 plan, indicating routine liquidity management.

The reported dispositions on 08/18/2025 (26,418 shares at a weighted-average $6.88) and 08/19/2025 (19,353 shares at a weighted-average $7.33) appear to be administrative: the first to satisfy RSU tax obligations and the second under a pre-established 10b5-1 plan dated June 3, 2024. Direct holdings remained above 3.5 million shares after transactions. Multiple indirect trust holdings are disclosed with specific share counts, which should be aggregated by investors seeking total economic exposure. No derivative transactions or additional material events are disclosed in this filing.

Corporate Governance Expert

TL;DR: Disclosures follow Form 4 norms: sales are explained in footnotes and executed under established plan, demonstrating compliance and transparency.

The Form 4 clearly states the nature of the 08/18 sale (tax withholding on vested RSUs) and the 08/19 sale (executed pursuant to a Rule 10b5-1 plan). Footnotes identify the reporting person’s roles in related trusts (settlor, trustee, investment advisor), which clarifies indirect ownership pathways. Signature by an attorney-in-fact is provided. From a governance perspective, the filing contains the required explanations and does not reveal unexpected insider activity beyond routine liquidity and tax-related dispositions.

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
Estimated average burden
hours per response:			0.5

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)
08/18/2025

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	08/18/2025		S(1)		26,418	D	$6.88(2)	3,599,616	D
Class A Common Stock	08/19/2025		S(3)		19,353	D	$7.33(4)	3,580,263	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. Shares sold to satisfy tax obligations in connection with the vesting of previously granted Restricted Stock Units.

2. The price reported in Column 4 is a weighted average price. These shares were sold in multiple transactions at prices ranging from $6.84 to $6.88. 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) and (4) to this Form 4.

3. The sale was effected pursuant to a Rule 10b5-1 trading plan adopted by the reporting person on June 3, 2024.

4. The price reported in Column 4 is a weighted average price. These shares were sold in multiple transactions at prices ranging from $7.13 to $7.53, 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	08/20/2025
	** 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 shares did Artur Bergman sell on 08/18/2025 and why?

He sold 26,418 shares at a weighted-average price of $6.88 to satisfy tax obligations related to RSU vesting.

What transaction occurred under a 10b5-1 plan for FSLY?

On 08/19/2025 Bergman sold 19,353 shares at a weighted-average price of $7.33 pursuant to a Rule 10b5-1 plan adopted June 3, 2024.

How many Class A shares did Bergman directly own after these transactions?

Direct beneficial ownership was reported as 3,599,616 shares after 08/18/2025 and 3,580,263 shares after 08/19/2025.

Does the Form 4 report indirect holdings for Bergman?

Yes; the filing lists several indirect holdings by trusts, including positions of 2,500,558, 840,005, 109,686, 50,481, 792,998, and 156,521 shares.

Who signed the Form 4 and when?

The Form 4 was signed by /s/ Tara Seracka, Attorney-in-Fact on 08/20/2025.