Fastly insider plans $1.27M sale under Rule 144

Fastly, Inc. (FSLY) reports that Charles L. Compton III has filed a Form 144 notice to sell 55,579 shares of Fastly common stock under Rule 144 through Morgan Stanley Smith Barney LLC.

Rhea-AI Filing Summary

Fastly, Inc. (FSLY) reports that Charles L. Compton III has filed a Form 144 notice to sell 55,579 shares of Fastly common stock under Rule 144 through Morgan Stanley Smith Barney LLC. The shares were acquired upon vesting of restricted stock units and performance stock units between January 15, 2026 and August 15, 2026.

Over the prior three months, Compton reported multiple sales of Fastly common stock, including 34,552 shares for $988,336.04 on August 18, 2026 and 15,028 shares for $345,644.00 on August 31, 2026, with several transactions executed pursuant to a Rule 10b5-1 trading plan.

Key Figures

Shares to be sold under Rule 144: 55,579 shares Aggregate market value of securities to be sold: $1,266,645.41 Trading volume: 159,300,000 shares +3 more

6 metrics

Shares to be sold under Rule 144 55,579 shares Fastly, Inc. common stock for account of Charles L. Compton III

Aggregate market value of securities to be sold $1,266,645.41 Fastly, Inc. common stock covered by the Form 144 notice

Trading volume 159,300,000 shares Fastly, Inc. common stock trading volume reference in the filing

Sale on August 31, 2026 15,028 shares for $345,644.00 Past 3‑month sale of Fastly, Inc. common stock

Sale on August 18, 2026 34,552 shares for $988,336.04 Past 3‑month sale of Fastly, Inc. common stock

Sale on August 4, 2026 14,868 shares for $371,700.00 10b5-1 sale of Fastly, Inc. common stock

Key Terms

Rule 144, restricted stock units, performance stock units, 10b5-1, +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.

restricted stock units financial

"acquired upon the vesting of restricted stock units and performance"

Restricted stock units are a type of company reward where employees are promised shares of stock, but they only fully own these shares after meeting certain conditions, like staying with the company for a set time. They matter because they can become valuable assets and are often used to motivate employees to help the company succeed.

performance stock units financial

"acquired upon the vesting of restricted stock units and performance"

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.

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.

Form 144 regulatory

"144: Filer Information Filer CIK"

Form 144 is a document that investors must file with the government when they plan to sell a large number of shares of a company's stock. It helps ensure transparency so everyone knows how many shares are being sold and when, which can impact the stock's price.

FAQ

What does the Form 144 filed for FSLY disclose about upcoming insider sales?

The Form 144 discloses that 55,579 shares of Fastly, Inc. common stock may be sold for the account of Charles L. Compton III under Rule 144, with sales to be executed through Morgan Stanley Smith Barney LLC.

Who is selling Fastly (FSLY) shares according to this Form 144?

The potential sale concerns shares held for the account of Charles L. Compton III, identified in the filing in connection with Fastly, Inc. common stock and using Morgan Stanley Smith Barney LLC as the broker.

How many FSLY shares are covered by the new Form 144 notice?

The notice covers a potential sale of 55,579 shares of Fastly, Inc. common stock. These shares were acquired upon vesting of restricted stock units and performance stock units between January 15, 2026 and August 15, 2026.

What prior 3‑month Fastly (FSLY) insider sales are reported in the Form 144?

Reported prior 3‑month sales by Charles L. Compton III include 34,552 shares for $988,336.04 on August 18, 2026 and 15,028 shares for $345,644.00 on August 31, 2026, among other transactions.

Were recent FSLY insider sales made under a Rule 10b5-1 plan?

Yes. Several sales of Fastly, Inc. common stock for Charles L. Compton III are identified as 10b5-1 Sales, including transactions on August 19, 2026; August 4, 2026; July 17, 2026; and June 3, 2026.

At what broker are the FSLY Rule 144 shares to be sold?

The Form 144 states that the Fastly, Inc. common shares may be sold through Morgan Stanley Smith Barney LLC Executive Financial Services, located at 1 New York Plaza, New York, NY.

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

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Available on EDGAR 09/01/2026 - 04:42 PM Accepted by SEC EDGAR 09/01/2026 - 04:41 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	55579	1266645.41	159300000	09/01/2026	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	01/15/2026	RSU/PSU	Issuer			55579	01/15/2026	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
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	The securities to be sold were acquired upon the vesting of restricted stock units and performance stock units during the period of 1/15/2026 through 8/15/2026
Date of Notice	09/01/2026
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)