Cloudflare (NYSE: NET) insider sold $16.5M in shares and plans another sale

Rhea-AI Filing Summary

Cloudflare, Inc. insider Thomas Seifert filed to sell 10,000 shares of common stock, to be sold through Morgan Stanley Smith Barney LLC on August 17, 2026 on the NYSE, in connection with an exercise of stock options for cash. The filing also lists prior sales under a 10b5-1 Sales Plan over the past three months: 55,000 shares on August 4, 2026 for $16,516,285.50, and 10,000 shares each on July 17, 2026 for $2,769,195.00, June 17, 2026 for $2,323,887.00, and May 18, 2026 for $2,006,068.00.

Key Figures

Planned shares to be sold: 10,000 shares Aggregate market value of planned sale: $3,157,800.00 Shares sold on August 4, 2026: 55,000 shares +4 more

7 metrics

Planned shares to be sold 10,000 shares Common stock sale planned for August 17, 2026 on NYSE

Aggregate market value of planned sale $3,157,800.00 Value associated with 10,000 shares listed for August 17, 2026

Shares sold on August 4, 2026 55,000 shares 10b5-1 Sales Plan transaction for common stock

Value of August 4, 2026 sale $16,516,285.50 Aggregate value for 55,000 shares under 10b5-1 Sales Plan

Value of July 17, 2026 sale $2,769,195.00 Aggregate value for 10,000-share 10b5-1 sale

Value of June 17, 2026 sale $2,323,887.00 Aggregate value for 10,000-share 10b5-1 sale

Value of May 18, 2026 sale $2,006,068.00 Aggregate value for 10,000-share 10b5-1 sale

Key Terms

10b5-1 Sales Plan, Exercise of Stock Options, Cash, NYSE, +1 more

5 terms

10b5-1 Sales Plan financial

"10b5-1 Sales Plan for THOMAS SEIFERT 101 Townsend Street"

A 10b5-1 sales plan is a written, prearranged schedule that company insiders use to buy or sell their employer’s stock under a U.S. securities rule, so trades occur automatically at set times or prices regardless of later private information. It matters to investors because it reduces the risk of insider-trading accusations and signals that certain insider trades were planned ahead—like putting transactions on autopilot—while still affecting share supply and market confidence.

Exercise of Stock Options financial

"Common | 08/17/2026 | Exercise of Stock Options | Issuer"

Cash financial

"10000 | 08/17/2026 | Cash"

NYSE market

"08/17/2026 | NYSE"

A large, regulated marketplace where stocks and other securities are listed and traded, acting like a global auction house that matches buyers and sellers and helps determine share prices. It matters to investors because listing and trading there provide liquidity, price discovery, and regulatory oversight—making it easier to buy or sell holdings and giving companies a visible platform that can affect credibility and access to capital.

Executive Financial Services financial

"Morgan Stanley Smith Barney LLC Executive Financial Services"

FAQ

What does Cloudflare (NET) disclose about upcoming insider stock sales in this Form 144?

Cloudflare discloses that insider Thomas Seifert plans to sell 10,000 shares of common stock on August 17, 2026 on the NYSE, following an exercise of stock options for cash.

How many Cloudflare (NET) shares has Thomas Seifert sold recently under his 10b5-1 plan?

Thomas Seifert sold 55,000 shares on August 4, 2026, and 10,000 shares each on July 17, June 17, and May 18, 2026, all under a 10b5-1 Sales Plan.

What total dollar values are associated with recent Cloudflare (NET) insider sales?

Reported sales include $16,516,285.50 for 55,000 shares on August 4, 2026, plus $2,769,195.00, $2,323,887.00, and $2,006,068.00 for 10,000-share transactions in July, June, and May 2026, respectively.

Through which broker will the new Cloudflare (NET) insider sale be executed?

The planned sale of 10,000 Cloudflare common shares on August 17, 2026 is listed as being handled by Morgan Stanley Smith Barney LLC Executive Financial Services, located at 1 New York Plaza, New York.

On which exchange are the Cloudflare (NET) shares in this Form 144 expected to be sold?

The planned sale of 10,000 Cloudflare common shares by Thomas Seifert on August 17, 2026 is identified as occurring on the NYSE, indicating where the shares are expected to be traded.

What is the relationship between the Cloudflare (NET) Form 144 sale and stock options?

The planned sale of 10,000 shares on August 17, 2026 is described as arising from an Exercise of Stock Options, with the transaction type specified as Cash for the option exercise.

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

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Available on EDGAR 08/17/2026 - 04:33 PM Accepted by SEC EDGAR 08/17/2026 - 04:33 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
Filer CCC
Is this a LIVE or TEST Filing?	LIVE TEST
Submission Contact Information
Name
Phone
E-Mail Address

144: Issuer Information

Name of Issuer

SEC File Number

Address of Issuer

Phone

Name of Person for Whose Account the Securities are To Be Sold

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

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	10000	3157800.00	322618775	08/17/2026	NYSE

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	08/17/2026	Exercise of Stock Options	Issuer			10000	08/17/2026	Cash

* 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 Plan for THOMAS SEIFERT 101 Townsend Street San Francisco CA 94107	Common	08/04/2026	55000	16516285.50
10b5-1 Sales Plan for THOMAS SEIFERT 101 Townsend Street San Francisco CA 94107	Common	07/17/2026	10000	2769195.00
10b5-1 Sales Plan for THOMAS SEIFERT 101 Townsend Street San Francisco CA 94107	Common	06/17/2026	10000	2323887.00
10b5-1 Sales Plan for THOMAS SEIFERT 101 Townsend Street San Francisco CA 94107	Common	05/18/2026	10000	2006068.00

144: Remarks and Signature

Remarks

Date of Notice

Date of Plan Adoption or Giving of Instruction, If Relying on Rule 10b5-1

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

ATTENTION: Intentional misstatements or omission of facts constitute Federal Criminal Violations (See 18 U.S.C. 1001)