Fastly holder plans 2,436-share Rule 144 sale

Charles L. Compton III files a Rule 144 notice to sell 2,436 shares of Fastly, Inc. common stock, following several recent 10b5-1 plan sales.

Rhea-AI Filing Summary

Fastly, Inc. (FSLY) is the issuer of common stock for which Charles L. Compton III has filed a notice of proposed sale under Rule 144. The notice covers the potential sale of 2,436 shares of Fastly common stock, with an approximate aggregate market value of $50,157.24, to be sold through Morgan Stanley Smith Barney LLC on or after September 8, 2026 on NASDAQ. The filing lists approximately 159,300,000 shares of Fastly common stock outstanding.

The shares to be sold relate to Performance Stock Units from the issuer. The filing also reports multiple prior sales of Fastly common stock by Charles L. Compton III during the past three months, some pursuant to a Rule 10b5-1 trading plan, including 55,579 shares for $1,188,669.26 on September 1, 2026 and 34,552 shares for $988,336.04 on August 18, 2026.

Key Figures

Shares proposed for sale: 2,436 shares Aggregate market value of proposed sale: $50,157.24 Shares outstanding: 159,300,000 shares +4 more

7 metrics

Shares proposed for sale 2,436 shares Fastly common stock under Rule 144, to be sold on or after September 8, 2026

Aggregate market value of proposed sale $50,157.24 Estimated value of 2,436 Fastly shares covered by the Rule 144 notice

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

Sale on September 1, 2026 55,579 shares for $1,188,669.26 Common stock sale by Charles L. Compton III, noted as a 10b5-1 sale

Sale on August 18, 2026 34,552 shares for $988,336.04 Common stock sale by Charles L. Compton III

Sale on August 31, 2026 15,028 shares for $345,644.00 Common stock sale by Charles L. Compton III

Sale on September 2, 2026 9,458 shares for $193,111.93 Common stock sale by Charles L. Compton III, noted as a 10b5-1 sale

Key Terms

Rule 144, 10b5-1, Performance Stock Units, NASDQ, +1 more

5 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"

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.

NASDQ market

"159300000 | 09/08/2026 | NASDAQ"

Executive Financial Services financial

"Morgan Stanley Smith Barney LLC Executive Financial Services 1 New York Plaza"

FAQ

What does Fastly, Inc. (FSLY) disclose in this Form 144 filing?

The filing reports that Charles L. Compton III intends to sell 2,436 shares of Fastly common stock under Rule 144, with an approximate value of $50,157.24, through Morgan Stanley Smith Barney LLC on or after September 8, 2026.

How many Fastly (FSLY) shares are covered by the proposed Rule 144 sale?

The notice covers a proposed sale of 2,436 shares of Fastly, Inc. common stock, with an approximate aggregate market value of $50,157.24, to be sold on or after September 8, 2026.

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

The filing states that approximately 159,300,000 shares of Fastly, Inc. common stock are outstanding. This figure is presented as context for the Rule 144 sale notice.

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

Multiple sales over the prior three months are listed, including 55,579 shares for $1,188,669.26 on September 1, 2026 and 34,552 shares for $988,336.04 on August 18, 2026, some designated as 10b5-1 sales.

Are the Fastly (FSLY) sales linked to a Rule 10b5-1 trading plan?

Yes. Several transactions in the past three months are identified as “10b5-1 Sales” for Charles L. Compton III, including sales on September 2, 2026, September 1, 2026, August 19, 2026, August 4, 2026, and July 17, 2026.

What type of Fastly (FSLY) equity awards relate to the shares in this Form 144?

The securities to be sold are associated with Performance Stock Units from Fastly, Inc., with an acquisition date listed as August 28, 2026 for the 2,436 shares covered by the notice.

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

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Available on EDGAR 09/08/2026 - 04:31 PM Accepted by SEC EDGAR 09/08/2026 - 04:31 PM 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	2436	50157.24	159300000	09/08/2026	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			2436	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	09/02/2026	9458	193111.93
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

144: Remarks and Signature

Remarks
Date of Notice	09/08/2026
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 Compton
ATTENTION: Intentional misstatements or omission of facts constitute Federal Criminal Violations (See 18 U.S.C. 1001)