Insider Charles Compton plans stock sale under Form 144

An affiliate of the issuer filed a notice of proposed sale of 14,868 shares of common stock, with an indicated aggregate market value of $342,410.04, to be sold on or after August 4, 2026 on NASDAQ.

Rhea-AI Filing Summary

An affiliate of the issuer filed a notice of proposed sale of 14,868 shares of common stock, with an indicated aggregate market value of $342,410.04, to be sold on or after August 4, 2026 on NASDAQ. The filing notes prior grants of Restricted Stock Units dated May 15, 2025.

It also lists recent Rule 10b5-1 plan sales by Charles L. Compton III over the past three months, including 7,073 shares for $147,768.10 on July 17, 2026; 11,412 shares for $235,657.80 on July 16, 2026; and several earlier sales in May and June 2026.

Key Figures

Shares to be sold: 14,868 shares Aggregate market value of proposed sale: $342,410.04 Shares outstanding context: 156,500,000 shares +5 more

8 metrics

Shares to be sold 14,868 shares Proposed common stock sale under Form 144

Aggregate market value of proposed sale $342,410.04 Proposed 14,868-share common stock sale

Shares outstanding context 156,500,000 shares Outstanding common stock figure shown with the Form 144 sale

10b5-1 sale 07/17/2026 7,073 shares for $147,768.10 Common stock sale by Charles L. Compton III

10b5-1 sale 07/16/2026 11,412 shares for $235,657.80 Common stock sale by Charles L. Compton III

10b5-1 sale 06/03/2026 9,313 shares for $193,613.18 Common stock sale by Charles L. Compton III

10b5-1 sale 05/29/2026 15,028 shares for $254,874.88 Common stock sale by Charles L. Compton III

10b5-1 sale 05/18/2026 34,334 shares for $578,509.60 Common stock sale by Charles L. Compton III

Key Terms

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

4 terms

Form 144 regulatory

"144: Securities Information Common | Morgan Stanley Smith Barney LLC"

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.

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.

Restricted Stock Units financial

"Common | 05/15/2025 | 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.

aggregate market value financial

"Common | Morgan Stanley Smith Barney LLC ... | 342410.04"

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 stock sale is being proposed in the Form 144 related to FSLY?

The notice covers a proposed sale of 14,868 shares of common stock with an aggregate market value of $342,410.04, expected to be sold on or after August 4, 2026 on NASDAQ.

Who is the selling security holder in the FSLY-related Form 144?

The filing references Charles L. Compton III in connection with recent Rule 10b5-1 plan sales of common stock, and also cites holdings managed through Morgan Stanley Smith Barney LLC Executive Financial Services as the broker for the proposed sale.

What recent 10b5-1 stock sales are disclosed for FSLY insider Charles L. Compton III?

Disclosed 10b5-1 sales include 7,073 shares for $147,768.10 on July 17, 2026; 11,412 shares for $235,657.80 on July 16, 2026; 9,313 shares for $193,613.18 on June 3, 2026; and additional sales in May 2026.

What earlier May 2026 sales of FSLY stock are shown for Charles L. Compton III?

May 2026 entries show sales of 15,028 shares for $254,874.88 on May 29; 11,275 shares for $185,806.04 on May 19; and 34,334 shares for $578,509.60 on May 18, all reported as common stock transactions.

What restricted stock unit information is disclosed for FSLY in this filing?

The filing lists Restricted Stock Units in common stock with a grant date of May 15, 2025, showing they were issued by the issuer. This establishes an equity award background related to the reported common stock activity.

How many shares of the issuer’s common stock are reported outstanding in this context for FSLY?

The securities section indicates 156,500,000 shares of common stock outstanding in connection with the proposed Form 144 sale; this figure serves as an outstanding share count context for the notice.

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

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Available on EDGAR 08/04/2026 - 04:37 PM Accepted by SEC EDGAR 08/04/2026 - 04:37 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	14868	342410.04	156500000	08/04/2026	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	05/15/2025	Restricted Stock Units	Issuer			14868	05/15/2025	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	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
10b5-1 Sales for CHARLES L COMPTON III 475 Brannan Street, Suite 300 San Francisco CA 94107	Common	05/19/2026	11275	185806.04
CHARLES L COMPTON III 475 Brannan Street, Suite 300 San Francisco CA 94107	Common	05/18/2026	34334	578509.60

144: Remarks and Signature

Remarks	The securities to be sold were acquired upon the vesting of restricted stock units during the period of 5/15/2025 through 7/15/2025.
Date of Notice	08/04/2026
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)