Fastly director plans $1.17M stock sale

Available on EDGAR 09/14/2026 - 04:56 PM EDT Accepted by SEC EDGAR 09/14/2026 - 04:48 PM EDT Learn about SEC filing dates

Rhea-AI Filing Summary

Fastly, Inc. (FSLY) director-level insider Charles L. Compton III filed a notice of proposed sale under Rule 144 covering up to 50,392 shares of common stock, with an indicated aggregate market value of $1,167,078.72, when there were 159,300,000 shares outstanding on Nasdaq.

The shares to be sold were acquired from Fastly through the vesting of restricted stock units and performance stock units during the period from January 15, 2026 through August 28, 2026. The notice also lists multiple common stock sales in the prior three months, some under a Rule 10b5-1 trading plan.

Key Figures

Shares proposed for sale under Rule 144: 50,392 shares Aggregate market value of proposed sale: $1,167,078.72 Shares outstanding: 159,300,000 shares +3 more

6 metrics

Shares proposed for sale under Rule 144 50,392 shares Maximum Fastly common shares covered by the notice

Aggregate market value of proposed sale $1,167,078.72 Value associated with 50,392 shares in the notice

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

Recent sale on September 1, 2026 55,579 shares for $1,188,669.26 Common stock sale by Charles L. Compton III

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

Recent sale on August 4, 2026 14,868 shares for $371,700.00 Common stock sale identified as a 10b5-1 sale

Key Terms

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

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.

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

"vesting of restricted stock units and performance stock units during"

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.

Rule 10b5-1 regulatory

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

Rule 10b5-1 is a regulation that allows company insiders to buy or sell their shares at predetermined times, even if they have access to non-public information. It acts like setting a schedule in advance for transactions, helping prevent accusations of unfair trading. This rule provides a way for insiders to plan trades transparently, giving investors confidence that these transactions are not based on hidden information.

FAQ

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

What insider transaction did Fastly (FSLY) disclose in this Form 144?

The notice reports that Charles L. Compton III may sell up to 50,392 shares of Fastly common stock under Rule 144, representing shares acquired upon vesting of restricted stock units and performance stock units.

What is the approximate market value of the Fastly (FSLY) shares covered by this Form 144?

The filing lists an aggregate market value of $1,167,078.72 for the 50,392 shares of Fastly common stock that may be sold under Rule 144, based on the market price used in the notice.

How many Fastly (FSLY) shares were outstanding as referenced in the Form 144?

The Form 144 states that there were 159,300,000 shares outstanding of Fastly common stock in connection with the proposed Rule 144 sale disclosure.

How were the Fastly (FSLY) shares in this Form 144 acquired by Charles L. Compton III?

The notice explains that the shares to be sold were acquired upon the vesting of restricted stock units and performance stock units during the period from January 15, 2026 through August 28, 2026.

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

Recent sales include, among others, 55,579 shares on September 1, 2026 for $1,188,669.26 and 34,552 shares on August 18, 2026 for $988,336.04, with several transactions identified as 10b5-1 sales.

Was a trading plan referenced for the Fastly (FSLY) insider sales?

Yes. Multiple recent dispositions are labeled as 10b5-1 sales for Charles L. Compton III, indicating sales made pursuant to a pre-arranged Rule 10b5-1 trading plan.

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

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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	50392	1167078.72	159300000	09/14/2026	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			50392	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
10b5-1 Sales for CHARLES L COMPTON III 475 Brannan Street, Suite 300 San Francisco CA 94107	Common	09/08/2026	2436	51716.28
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	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 8/28/2026.
Date of Notice	09/14/2026
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
ATTENTION: Intentional misstatements or omission of facts constitute Federal Criminal Violations (See 18 U.S.C. 1001)