[Form 4] Fastly, Inc. Insider Trading Activity

Rhea-AI Filing Summary

Fastly, Inc. (FSLY) reported an insider transaction by its CEO and director. On 11/18/2025, the executive sold 18,455 shares of Class A common stock at a weighted average price of $10.23 per share. According to the footnotes, these shares were sold to satisfy tax obligations tied to the vesting of previously granted restricted stock units.

After this transaction, the reporting person beneficially owns 640,858 shares of Fastly Class A common stock, held directly. The sale was reported on a Form 4 filed by a single reporting person and was executed under normal Section 16 reporting requirements.

Insights

Equity analyst

Routine CEO share sale to cover taxes; overall neutral event.

The CEO of Fastly, Inc. reported selling 18,455 Class A shares on 11/18/2025 at a weighted average price of $10.23. The filing states this sale was made to satisfy tax obligations arising from the vesting of previously granted restricted stock units, which is a common administrative transaction for equity compensation.

Following the sale, the CEO still directly owns 640,858 Class A shares, indicating a substantial remaining stake in the company. Because the transaction is explicitly linked to tax withholding rather than discretionary selling, it is best viewed as a routine compensation-related event rather than a directional signal. Overall, this appears administratively focused and not thesis-changing for investors.

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).

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^*

Compton Charles Lacey III

(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)
	CEO

3. Date of Earliest Transaction (Month/Day/Year)
11/18/2025

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	11/18/2025		S(1)		18,455	D	$10.23(2)	640,858	D

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 $10.23 to $10.25. 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 (2) to this Form 4.

Remarks:

	/s/ Tara Seracka, Attorney-in-Fact	11/20/2025
	** 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 insider transaction did Fastly (FSLY) report in this Form 4?

The CEO and director of Fastly, Inc. (FSLY) reported selling 18,455 shares of Class A common stock on 11/18/2025.

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

The shares were sold at a weighted average price of $10.23 per share, with individual trades executed between $10.23 and $10.25.

Why did the Fastly CEO sell 18,455 shares?

The filing states the 18,455 shares were sold to satisfy tax obligations in connection with the vesting of previously granted restricted stock units.

How many Fastly (FSLY) shares does the CEO own after this transaction?

After the reported sale, the CEO beneficially owns 640,858 shares of Fastly Class A common stock, held directly.

Is this Fastly Form 4 filed by more than one reporting person?

No. The Form 4 indicates it is filed by one reporting person, covering the CEO and director of Fastly.

Does this Fastly insider sale involve any derivative securities or options?

No derivative securities are reported in Table II for this transaction; only non-derivative Class A common stock is shown.