Form 144: Officer 10b5-1 Sales of FSLY Shares

Filer reported multiple sales of Common Stock via Form 144, including transactions executed under a Rule 10b5-1 plan.

Rhea-AI Filing Summary

Filer reported multiple sales of Common Stock via Form 144, including transactions executed under a Rule 10b5-1 plan. The filing lists individual dispositions on dates between 03/04/2026 and 05/29/2026 with per-trade share counts and dollar values documented.

Key Figures

Shares sold (example): 59,224 shares Proceeds (example): $1,247,257.44 Shares sold (example): 49,350 shares +2 more

5 metrics

Shares sold (example) 59,224 shares sold on <date>03/04/2026</date>

Proceeds (example) $1,247,257.44 proceeds from 59,224-share sale on <date>03/04/2026</date>

Shares sold (example) 49,350 shares sold on <date>03/11/2026</date>

Proceeds (example) $1,233,750.00 proceeds from 49,350-share sale on <date>03/11/2026</date>

Performance Stock Units listed 05/28/2026 entry under Securities To Be Sold

Key Terms

Form 144, 10b5-1 Sales, Performance Stock Units

3 terms

Form 144 regulatory

"Filer Information | 144: Filer Information"

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.

10b5-1 Sales regulatory

"10b5-1 Sales for CHARLES L COMPTON III"

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.

Performance Stock Units financial

"Securities To Be Sold | Performance Stock Units"

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.

FAQ

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

What does the FSLY Form 144 disclose about recent insider sales?

The Form 144 lists multiple insider sales of Common Stock between 03/04/2026 and 05/29/2026. Each entry shows share counts and cash values, with many trades noted as 10b5-1 Sales in the filing.

How many shares did Charles L. Compton III sell on 03/04/2026 according to the filing?

On 03/04/2026 the filing shows two separate entries: 13,982 shares for $285,371.22 and 59,224 shares for $1,247,257.44, totaling the documented dispositions on that date.

Were the sales executed under a trading plan in the Form 144?

Yes. Several transactions are labeled in the filing as 10b5-1 Sales, indicating they were executed pursuant to a prearranged Rule 10b5-1 plan as stated alongside specific trade entries.

What price proceeds are shown for the largest single trade in the excerpt?

The largest single trade shown in the excerpt lists 49,350 shares on 03/11/2026 with proceeds of $1,233,750.00 as documented in the filing.

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

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Accepted by SEC EDGAR 06/03/2026 - 04:29 PM EDT 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	9313	193431.01	156500000	06/03/2026	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	05/28/2026	Performance Stock Units	Issuer			9313	05/28/2026	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
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
10b5-1 Sales for CHARLES L COMPTON III 475 Brannan Street, Suite 300 San Francisco CA 94107	Common	04/17/2026	7059	173443.16
10b5-1 Sales for CHARLES L COMPTON III 475 Brannan Street, Suite 300 San Francisco CA 94107	Common	04/16/2026	11042	276050.00
CHARLES L COMPTON III 475 Brannan Street, Suite 300 San Francisco CA 94107	Common	04/15/2026	11432	270824.08
10b5-1 Sales for CHARLES L COMPTON III 475 Brannan Street, Suite 300 San Francisco CA 94107	Common	03/11/2026	49350	1233750.00
10b5-1 Sales for CHARLES L COMPTON III 475 Brannan Street, Suite 300 San Francisco CA 94107	Common	03/05/2026	36694	759066.76
10b5-1 Sales for CHARLES L COMPTON III 475 Brannan Street, Suite 300 San Francisco CA 94107	Common	03/04/2026	13982	285371.22
CHARLES L COMPTON III 475 Brannan Street, Suite 300 San Francisco CA 94107	Common	03/04/2026	59224	1247257.44

144: Remarks and Signature

Remarks
Date of Notice	06/03/2026
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
ATTENTION: Intentional misstatements or omission of facts constitute Federal Criminal Violations (See 18 U.S.C. 1001)