Fastly insider plans sale of 9,458 shares

A Fastly insider has filed a Rule 144 notice to sell 9,458 shares, alongside recent 10b5-1 plan sales.

Rhea-AI Filing Summary

Fastly, Inc. (FSLY) reports that Charles L. Compton III has filed a notice under Rule 144 to potentially sell 9,458 shares of common stock, with an indicated aggregate market value of $196,442.66, relative to 159,300,000 shares of common stock outstanding. The notice also lists several recent open-market sales, some made pursuant to a Rule 10b5-1 trading plan.

Key Figures

Shares to be sold under Rule 144: 9,458 shares Aggregate market value of shares to be sold: $196,442.66 Shares outstanding: 159,300,000 shares +4 more

7 metrics

Shares to be sold under Rule 144 9,458 shares Common stock covered by the notice for potential sale

Aggregate market value of shares to be sold $196,442.66 Estimated value of 9,458 shares covered by the notice

Shares outstanding 159,300,000 shares Fastly common stock outstanding as referenced in the notice

Recent sale on September 1, 2026 55,579 shares for $1,188,669.26 Common stock sale reported during the past three months

Recent sale on August 31, 2026 15,028 shares for $345,644.00 Common stock sale reported during the past three months

Recent sale on August 18, 2026 34,552 shares for $988,336.04 Common stock sale reported during the past three months

Recent sale on June 3, 2026 9,313 shares for $193,613.18 Common stock sale reported during the past three months

Key Terms

Rule 144, 10b5-1, Performance Stock Units, aggregate market value

4 terms

Rule 144 regulatory

"See the definition of "person" in paragraph (a) of Rule 144."

Rule 144 is a U.S. securities regulation that sets conditions under which restricted or insider-held shares can be legally resold to the public, such as required holding periods, availability of public information, limits on how much can be sold at once, and certain filing requirements. For investors it matters because it determines when previously locked-up shares can enter the market — like a release valve that can increase supply, affect share price, and signal insider intent.

10b5-1 regulatory

"10b5-1 Sales for CHARLES L COMPTON III 475 Brannan Street, Suite 300"

A 10b5-1 plan is a pre-set schedule that lets company insiders buy or sell shares according to written instructions made when they do not possess material, nonpublic information. Think of it as a timed automatic payment for stock trades: it helps insiders avoid accusations of trading on secret information and gives outside investors a clearer signal about whether sales are routine or potentially informative about the company’s prospects.

Performance Stock Units financial

"Common | 08/28/2026 | Performance Stock Units | Issuer"

Performance stock units are a type of company award that grants employees shares of stock only if certain performance goals are met. They motivate employees to work toward specific company achievements, aligning their interests with those of shareholders. For investors, they can influence a company's future stock supply and reflect management’s confidence in reaching key targets.

aggregate market value financial

"| Common | Morgan Stanley Smith Barney LLC Executive Financial Services"

Aggregate market value is the combined price you would pay to buy all outstanding shares of a company or all companies in a group at current market prices — essentially the sum of each stock’s market capitalization. It matters to investors because it shows the overall size and weight of an investment or sector (like the total cost to buy every piece of a puzzle), helps compare scale across companies or markets, and influences index composition and risk exposure.

FAQ

AI-generated questions and answers. How Rhea-AI works. Not financial advice.

What does the Form 144 filing reveal about Fastly, Inc. (FSLY)?

The filing shows that Charles L. Compton III has notified an intent under Rule 144 to potentially sell 9,458 shares of Fastly common stock, with an indicated aggregate market value of $196,442.66, against 159,300,000 shares outstanding.

How many Fastly (FSLY) shares are covered by the new Rule 144 notice?

The notice covers a potential sale of 9,458 shares of Fastly common stock, with an indicated aggregate market value of $196,442.66 on the notice date of September 2, 2026.

How many Fastly (FSLY) shares are reported as outstanding in this filing?

The filing states that 159,300,000 shares of Fastly common stock were outstanding, providing context for the 9,458 shares that may be sold under this Rule 144 notice.

What recent Fastly (FSLY) stock sales by Charles L. Compton III are disclosed?

Recent sales include 55,579 shares on September 1, 2026 for $1,188,669.26 and 15,028 shares on August 31, 2026 for $345,644.00, along with several other smaller transactions during June–August 2026.

Were any of the recent Fastly (FSLY) insider sales made under a 10b5-1 plan?

Yes. Several entries are labeled “10b5-1 Sales for CHARLES L COMPTON III”, including transactions on September 1, 2026, August 19, 2026, August 4, 2026, July 17, 2026, and June 3, 2026.

What type of Fastly (FSLY) equity is associated with the shares to be sold?

The securities to be sold are listed as common stock related to Performance Stock Units with an acquisition date of August 28, 2026 and an amount of 9,458 shares.

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

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Available on EDGAR 09/02/2026 - 04:30 PM EDT Accepted by SEC EDGAR 09/02/2026 - 04:29 PM EDT Learn about SEC filing dates

Form 144 Filer Information	UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 Form 144 NOTICE OF PROPOSED SALE OF SECURITIES PURSUANT TO RULE 144 UNDER THE SECURITIES ACT OF 1933
FORM 144

144: Filer Information

Filer CIK	0002074428
Filer CCC	XXXXXXXX
Is this a LIVE or TEST Filing?	LIVE TEST
Submission Contact Information
Name
Phone
E-Mail Address

144: Issuer Information

Name of Issuer	FASTLY, INC.
SEC File Number	001-38897
Address of Issuer	475 Brannan Street, Suite 300 San Francisco CALIFORNIA 94107
Phone	8444327859
Name of Person for Whose Account the Securities are To Be Sold	Charles L. Compton III
See the definition of "person" in paragraph (a) of Rule 144. Information is to be given not only as to the person for whose account the securities are to be sold but also as to all other persons included in that definition. In addition, information shall be given as to sales by all persons whose sales are required by paragraph (e) of Rule 144 to be aggregated with sales for the account of the person filing this notice.
Relationship to Issuer	Director
Relationship to Issuer	Officer

144: Securities Information

Title of the Class of Securities To Be Sold	Name and Address of the Broker	Number of Shares or Other Units To Be Sold	Aggregate Market Value	Number of Shares or Other Units Outstanding	Approximate Date of Sale	Name the Securities Exchange
Common	Morgan Stanley Smith Barney LLC Executive Financial Services 1 New York Plaza 8th Floor New York NY 10004	9458	196442.66	159300000	09/02/2026	NASDAQ

Furnish the following information with respect to the acquisition of the securities to be sold and with respect to the payment of all or any part of the purchase price or other consideration therefor:

144: Securities To Be Sold

Title of the Class	Date you Acquired	Nature of Acquisition Transaction	Name of Person from Whom Acquired	Is this a Gift?	Date Donor Acquired	Amount of Securities Acquired	Date of Payment	Nature of Payment *
Common	08/28/2026	Performance Stock Units	Issuer			9458	08/28/2026	N/A

* If the securities were purchased and full payment therefor was not made in cash at the time of purchase, explain in the table or in a note thereto the nature of the consideration given. If the consideration consisted of any note or other obligation, or if payment was made in installments describe the arrangement and state when the note or other obligation was discharged in full or the last installment paid.

Furnish the following information as to all securities of the issuer sold during the past 3 months by the person for whose account the securities are to be sold.

144: Securities Sold During The Past 3 Months

Name and Address of Seller	Title of Securities Sold	Date of Sale	Amount of Securities Sold	Gross Proceeds
10b5-1 Sales for CHARLES L COMPTON III 475 Brannan Street, Suite 300 San Francisco CA 94107	Common	09/01/2026	55579	1188669.26
CHARLES L COMPTON III 475 Brannan Street, Suite 300 San Francisco CA 94107	Common	08/31/2026	15028	345644.00
10b5-1 Sales for CHARLES L COMPTON III 475 Brannan Street, Suite 300 San Francisco CA 94107	Common	08/19/2026	11198	276457.18
CHARLES L COMPTON III 475 Brannan Street, Suite 300 San Francisco CA 94107	Common	08/18/2026	34552	988336.04
10b5-1 Sales for CHARLES L COMPTON III 475 Brannan Street, Suite 300 San Francisco CA 94107	Common	08/04/2026	14868	371700.00
10b5-1 Sales for CHARLES L COMPTON III 475 Brannan Street, Suite 300 San Francisco CA 94107	Common	07/17/2026	7073	147768.10
CHARLES L COMPTON III 475 Brannan Street, Suite 300 San Francisco CA 94107	Common	07/16/2026	11412	235657.80
10b5-1 Sales for CHARLES L COMPTON III 475 Brannan Street, Suite 300 San Francisco CA 94107	Common	06/03/2026	9313	193613.18

144: Remarks and Signature

Remarks
Date of Notice	09/02/2026
Date of Plan Adoption or Giving of Instruction, If Relying on Rule 10b5-1	05/11/2026
ATTENTION:
The person for whose account the securities to which this notice relates are to be sold hereby represents by signing this notice that he does not know any material adverse information in regard to the current and prospective operations of the Issuer of the securities to be sold which has not been publicly disclosed. If such person has adopted a written trading plan or given trading instructions to satisfy Rule 10b5-1 under the Exchange Act, by signing the form and indicating the date that the plan was adopted or the instruction given, that person makes such representation as of the plan adoption or instruction date.
Signature	/s/ Charles L. Compton III
ATTENTION: Intentional misstatements or omission of facts constitute Federal Criminal Violations (See 18 U.S.C. 1001)