Fastly (FSLY) insider targets $298K stock sale in 2026

Rhea-AI Filing Summary

Fastly, Inc. (FSLY) insider Charles L. Compton III filed a notice of proposed sale of company stock under Rule 144. The filing covers up to 11,198 shares of common stock, to be sold through Morgan Stanley Smith Barney LLC, with an indicated market value of $297,754.82 and Fastly shares outstanding of 159,300,000 as context. The shares relate to Restricted Stock Units with a proposed sale date of 08/15/2026. The notice also lists prior sales over the last three months, including 34,552 shares for $988,336.04 on 08/17/2026 and several smaller transactions between 05/29/2026 and 08/04/2026.

Key Figures

Shares to be sold: 11,198 shares Market value of shares to be sold: $297,754.82 Fastly shares outstanding: 159,300,000 shares +3 more

6 metrics

Shares to be sold 11,198 shares Proposed sale of Fastly common stock under Rule 144

Market value of shares to be sold $297,754.82 Aggregate market value associated with 11,198 shares to be sold

Fastly shares outstanding 159,300,000 shares Common shares outstanding as context for the Rule 144 sale

Proposed sale date 08/15/2026 Date associated with the Restricted Stock Units to be sold

Recent sale on 08/17/2026 34,552 shares for $988,336.04 One of the past three months’ common stock sales

Recent sale on 08/04/2026 14,868 shares for $371,700.00 10b5-1 sale of Fastly common stock

Key Terms

Rule 144, Restricted Stock Units, 10b5-1 Sales, Executive Financial Services

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

"Common | 08/15/2026 | Restricted Stock Units | Issuer"

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.

10b5-1 Sales regulatory

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

10b5-1 sales are pre-arranged stock-trading plans that let company insiders automatically buy or sell shares according to a fixed schedule or formula, even if they later learn confidential information. Think of it as setting up an automatic thermostat for trades: it creates a clear, documented path that can protect insiders from insider-trading accusations and gives investors a signal about predictable insider activity—though it can also simply be a way for insiders to diversify or raise cash.

Executive Financial Services financial

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

FAQ

What does the Form 144 filing disclose for Fastly, Inc. (FSLY)?

The filing discloses that Charles L. Compton III intends to sell Fastly common stock under Rule 144. It specifies the number of shares to be sold, their market value, the proposed sale date, and past three months’ sales, providing transparency into this insider’s trading activity.

How many Fastly (FSLY) shares does Charles L. Compton III plan to sell?

The notice covers a proposed sale of up to 11,198 shares of Fastly common stock. These shares are tied to Restricted Stock Units, with a proposed sale date of 08/15/2026, and are to be sold through Morgan Stanley Smith Barney LLC’s Executive Financial Services platform.

What market value is associated with the Fastly (FSLY) shares to be sold in this Form 144?

The filing lists an aggregate market value of $297,754.82 for the 11,198 shares proposed for sale. This figure reflects the approximate dollar value used for the Rule 144 notice and does not, by itself, determine the final execution prices of future sales.

How many Fastly (FSLY) shares were sold by Charles L. Compton III in the past three months?

Recent transactions include 34,552 shares sold for $988,336.04 on 08/17/2026 and several earlier sales, such as 14,868 shares for $371,700.00 on 08/04/2026. Additional sales occurred on 07/17/2026, 07/16/2026, 06/03/2026, and 05/29/2026.

What is the significance of Rule 10b5-1 sales in the Fastly (FSLY) Form 144?

Several prior transactions are labeled as 10b5-1 Sales, indicating they occurred under a pre-established trading plan. Such plans are designed to allow insiders to sell shares according to preset terms, helping separate trading activity from day-to-day, non-public information.

What does the Form 144 say about Fastly (FSLY) shares outstanding?

The filing notes that Fastly had 159,300,000 shares of common stock outstanding. This figure serves as context for the scale of the proposed 11,198-share sale, showing that the notice relates to a relatively small portion of the company’s total equity.

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

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Available on EDGAR 08/19/2026 - 04:31 PM Accepted by SEC EDGAR 08/19/2026 - 04:30 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	11198	297754.82	159300000	08/19/2026	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	08/15/2026	Restricted Stock Units	Issuer			11198	08/15/2026	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	08/17/2026	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
CHARLES L COMPTON III 475 Brannan Street, Suite 300 San Francisco CA 94107	Common	05/29/2026	15028	254874.88

144: Remarks and Signature

Remarks
Date of Notice	08/19/2026
Date of Plan Adoption or Giving of Instruction, If Relying on Rule 10b5-1	08/27/2025
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)