Fastly (FSLY) CEO Compton sells 36,694 shares in Rule 10b5-1 trades

Rhea-AI Filing Summary

Fastly, Inc. CEO Charles Lacey Compton III reported open-market sales of 36,694 shares of Class A common stock. On March 5, 2026, he sold 29,294 shares at a weighted average price of $20.55 and 7,400 shares at a weighted average price of $21.22.

According to the filing, these transactions were executed under a pre-established Rule 10b5-1 trading plan adopted on August 27, 2025. After the reported sales, he directly held 1,212,778 shares of Fastly Class A common stock.

Insider Trade Summary

Net Seller: 36,694 shares ($759,020)

Net Sell 2 txns

Insider Compton Charles Lacey III

Role CEO

Sold 36,694 shs ($759K)

Type	Security	Shares	Price	Value
Sale	Class A Common Stock	29,294	$20.55	$602K
Sale	Class A Common Stock	7,400	$21.22	$157K

Holdings After Transaction: Class A Common Stock — 1,220,178 shares (Direct)

Footnotes (1)

1. The sales reported in this Form 4 were effected pursuant to a Rule 10b5-1 trading plan adopted by the reporting person on August 27, 2025. The price reported in Column 4 is a weighted average price. These shares were sold in multiple transactions at prices ranging from $20.09 to $21.08, inclusive. 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 (3) to this Form 4. The price reported in Column 4 is a weighted average price. These shares were sold in multiple transactions at prices ranging from $21.09 to $21.41, inclusive.

Form 4 Insider Transactions: What Each Field Means →

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^*

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)
03/05/2026

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	03/05/2026		S(1)		29,294	D	$20.55(2)	1,220,178	D
Class A Common Stock	03/05/2026		S(1)		7,400	D	$21.22(3)	1,212,778	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. The sales reported in this Form 4 were effected pursuant to a Rule 10b5-1 trading plan adopted by the reporting person on August 27, 2025.

2. The price reported in Column 4 is a weighted average price. These shares were sold in multiple transactions at prices ranging from $20.09 to $21.08, inclusive. 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 (3) to this Form 4.

3. The price reported in Column 4 is a weighted average price. These shares were sold in multiple transactions at prices ranging from $21.09 to $21.41, inclusive.

Remarks:

	/s/ Tara Seracka, Attorney-in-Fact	03/09/2026
	** 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 its CEO?

Fastly reported that CEO Charles Lacey Compton III sold 36,694 shares of Class A common stock. The sales occurred on March 5, 2026, in two open-market transactions at weighted average prices of $20.55 and $21.22 per share under a Rule 10b5-1 plan.

At what prices did the Fastly (FSLY) CEO sell his shares?

The CEO sold 29,294 Fastly shares at a weighted average price of $20.55 and 7,400 shares at a weighted average price of $21.22. The filing notes the trades occurred in multiple transactions within disclosed price ranges on March 5, 2026.

How many Fastly (FSLY) shares does the CEO hold after this Form 4?

After the reported transactions, CEO Charles Lacey Compton III directly holds 1,212,778 shares of Fastly Class A common stock. This post-transaction balance reflects the net position following the open-market sales disclosed for March 5, 2026.

Was the Fastly (FSLY) CEO’s stock sale under a Rule 10b5-1 plan?

Yes. The Form 4 states the sales were executed pursuant to a Rule 10b5-1 trading plan adopted by the CEO on August 27, 2025. Such plans pre-schedule trades, helping separate routine diversification from discretionary trading decisions.

How many total Fastly (FSLY) shares did the CEO sell in this Form 4?

The filing shows total sales of 36,694 Fastly Class A common shares. This includes 29,294 shares sold at a weighted average of $20.55 and 7,400 shares at a weighted average of $21.22, all on March 5, 2026, in open-market transactions.

What do the price range footnotes mean in the Fastly (FSLY) Form 4?

The footnotes explain that reported prices are weighted averages for multiple trades. For the first block, trades ranged from $20.09 to $21.08, and for the second from $21.09 to $21.41. Detailed per-trade pricing is available from the reporting person upon request.