Fastly CEO sells 9,458 shares at $20.42

Fastly’s CEO executed a pre-planned sale of 9,458 shares and still directly holds over 900,000 shares.

Rhea-AI Filing Summary

Fastly, Inc. (FSLY) reports that CEO and director Compton Charles Lacey III sold 9,458 shares of Class A common stock on September 2, 2026 at a weighted average price of $20.42 per share, with individual sale prices between $20.26 and $20.75.

The sale was made under a Rule 10b5-1 trading plan adopted on May 11, 2026, and he continues to hold 904,777 shares directly after the transaction.

Insider Trade Summary 10b5-1

Net Seller: 9,458 shares

Net Sell 1 txn

Insider Compton Charles Lacey III

Role CEO

Sold 9,458 shs ($193K)

Type	Security	Shares	Price	Value
Sale	Class A Common Stock F1, F2	9,458	$20.42	$193K

Holdings After Transaction: Class A Common Stock — 904,777 shares (Direct)

Footnotes (2)

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.
2. F2. The price reported in Column 4 is a weighted average price. These shares were sold in multiple transactions at prices ranging from $20.26 to $20.75, 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 range set forth in footnote (2) to this Form 4.

Key Figures

Shares sold: 9,458 shares Weighted average sale price: $20.42 per share Sale price range: $20.26–$20.75 per share +2 more

5 metrics

Shares sold 9,458 shares Class A common stock sold by the CEO on September 2, 2026

Weighted average sale price $20.42 per share Average price for the 9,458 shares sold on September 2, 2026

Sale price range $20.26–$20.75 per share Range of prices at which the reported shares were sold

Shares held after transaction 904,777 shares Direct holdings of the CEO following the September 2, 2026 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, weighted average price

2 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.

weighted average price financial

"The price reported in Column 4 is a weighted average price."

Weighted average price is the average price of a security where each trade or component is counted according to its size, so bigger trades pull the average more than smaller ones. Think of it like calculating the average cost of a grocery haul where items you bought more of have greater influence on the final per-item cost. Investors use it to understand the true average price paid or received, judge execution quality, and compare trading performance against market movement.

FAQ

What insider transaction did Fastly (FSLY) disclose in this Form 4?

Fastly disclosed that CEO and director Compton Charles Lacey III sold 9,458 shares of Class A common stock on September 2, 2026 in an open-market or private transaction at a weighted average price of $20.42 per share.

How many Fastly (FSLY) shares does the CEO hold after this reported sale?

After the September 2, 2026 sale, Compton Charles Lacey III directly holds 904,777 shares of Fastly Class A common stock, as reported in the Form 4.

At what prices were the Fastly (FSLY) shares sold in the CEO’s September 2, 2026 transaction?

The Form 4 states the CEO’s 9,458 shares were sold at a weighted average price of $20.42, with individual trades occurring in a range of $20.26 to $20.75 per share.

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

Yes. A footnote explains that the sales reported were effected pursuant to a Rule 10b5-1 trading plan adopted by Compton Charles Lacey III on May 11, 2026.

Does this Form 4 indicate any derivative securities for Fastly (FSLY)’s CEO?

No derivative transactions are reported. The Form 4 discloses only a single sale of 9,458 shares of Class A common stock and lists no derivative positions in this filing.

AI-generated analysis. How Rhea-AI works. Not financial advice.

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Available on EDGAR 09/04/2026 - 05:03 PM Accepted by SEC EDGAR 09/04/2026 - 05:02 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)
09/02/2026

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	09/02/2026		S(1)		9,458	D	$20.42(2)	904,777	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.

2. The price reported in Column 4 is a weighted average price. These shares were sold in multiple transactions at prices ranging from $20.26 to $20.75, 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 range set forth in footnote (2) to this Form 4.

Remarks:

	/s/ Tara Seracka, Attorney-in-Fact	09/04/2026
	** 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)