Fastly CEO sells 2,436 shares under plan

Fastly’s CEO reported a small Rule 10b5-1-planned share sale while retaining over 900,000 shares.

Rhea-AI Filing Summary

Fastly, Inc. (FSLY) reported that its CEO and director, Charles Lacey Compton III, sold 2,436 shares of Class A common stock on September 8, 2026 in an open-market transaction at an average price of $21.23 per share. The sale was made under a Rule 10b5-1 trading plan adopted on May 11, 2026. Following this sale, he directly holds 902,341 shares of Fastly Class A common stock.

Insider Trade Summary 10b5-1

Net Seller: 2,436 shares

Net Sell 1 txn

Insider Compton Charles Lacey III

Role CEO

Sold 2,436 shs ($52K)

Type	Security	Shares	Price	Value
Sale	Class A Common Stock F1	2,436	$21.23	$52K

Holdings After Transaction: Class A Common Stock — 902,341 shares (Direct)

Footnotes (1)

1. F1. The sales reported in this Form 4 were effected pursuant to a Rule 10b5-1 trading plan adopted by the reporting person on May 11, 2026.

Key Figures

Shares sold: 2,436 shares Sale price per share: $21.23 per share Shares held after sale: 902,341 shares +1 more

4 metrics

Shares sold 2,436 shares Class A common stock sold by the CEO on September 8, 2026

Sale price per share $21.23 per share Average price for the 2,436 shares sold on September 8, 2026

Shares held after sale 902,341 shares Direct holdings of Fastly Class A common stock by the CEO after the reported sale

Rule 10b5-1 plan adoption date May 11, 2026 Date the CEO adopted the trading plan used for this sale

Key Terms

Rule 10b5-1 trading plan

1 terms

Rule 10b5-1 trading plan regulatory

"The sales reported in this Form 4 were effected pursuant to a Rule 10b5-1 trading plan adopted by the reporting person on May 11, 2026."

A Rule 10b5-1 trading plan is a pre-arranged schedule that allows company insiders to buy or sell stock at specific times, even if they have inside information. It helps prevent accusations of unfair trading by making these transactions look planned and transparent, rather than sneaky or illegal.

FAQ

What insider transaction did Fastly (FSLY) disclose for its CEO?

Fastly disclosed that CEO and director Charles Lacey Compton III sold 2,436 shares of Class A common stock on September 8, 2026 in an open-market transaction at an average price of $21.23 per share.

How many Fastly (FSLY) shares did the CEO sell and at what price?

The CEO sold 2,436 shares of Fastly Class A common stock at an average price of $21.23 per share, as reported for the transaction dated September 8, 2026.

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

After the reported sale, CEO Charles Lacey Compton III directly holds 902,341 shares of Fastly Class A common stock.

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

Yes. The filing states the sales were effected pursuant to a Rule 10b5-1 trading plan adopted by the reporting person on May 11, 2026.

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

No. The Form 4 reports only a sale of 2,436 shares of Class A common stock and shows no derivative security transactions in this filing.

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Available on EDGAR 09/10/2026 - 04:52 PM Accepted by SEC EDGAR 09/10/2026 - 04:51 PM Learn about SEC filing dates

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 CALIFORNIA 94107

(City) (State) (Zip)

UNITED STATES

(Country)

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

2a. Foreign Trading Symbol

3. Date of Earliest Transaction (Month/Day/Year)
09/08/2026

6. Individual or Joint/Group Filing (Check Applicable Line)

X	Form filed by One Reporting Person
	Form filed by More than One Reporting Person

4. If Amendment, Date of Original Filed (Month/Day/Year)

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	09/08/2026		S(1)		2,436	D	$21.23	902,341	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 May 11, 2026.

Remarks:

	/s/ Tara Seracka, Attorney-in-Fact	09/10/2026
	** 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.
* Form 4: SEC 1474 (03-26)