Cloudflare's Seifert proposes $3.70M share sale

Three earlier sales under Thomas Seifert's 10b5-1 sales plan are dated August 4, August 17 and September 17, 2026.

Rhea-AI Filing Summary

Cloudflare, Inc. officer Thomas Seifert reported a proposed sale of 12,500 common shares, with an aggregate market value of $3,703,750.00 and an approximate sale date of October 19, 2026. The reported acquisition is an exercise of stock options from the issuer for cash, dated October 19, 2026. Morgan Stanley Smith Barney LLC is listed as the broker, and NYSE as the exchange.

Key Figures

Shares in proposed sale: 12,500 shares Aggregate market value: $3,703,750.00 Shares sold: 10,000 shares +5 more

8 metrics

Shares in proposed sale 12,500 shares Approximate sale date October 19, 2026

Aggregate market value $3,703,750.00 Proposed sale

Shares sold 10,000 shares September 17, 2026; 10b5-1 sales plan

Gross proceeds $3,324,617.00 September 17, 2026 sale

Shares sold 10,000 shares August 17, 2026; 10b5-1 sales plan

Gross proceeds $3,073,176.00 August 17, 2026 sale

Shares sold 55,000 shares August 4, 2026; 10b5-1 sales plan

Gross proceeds $16,516,285.50 August 4, 2026 sale

Key Terms

Rule 144, 10b5-1 Sales Plan, Exercise of Stock Options

3 terms

Rule 144 regulatory

"paragraph (e) 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.

10b5-1 Sales Plan regulatory

"10b5-1 Sales Plan for THOMAS SEIFERT"

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

"Exercise of Stock Options | Issuer"

FAQ

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

How many NET shares does officer Thomas Seifert plan to sell?

Thomas Seifert's proposed sale covers 12,500 common shares, with an aggregate market value of $3,703,750.00 and an approximate sale date of October 19, 2026.

What recent NET sales are listed under Thomas Seifert's 10b5-1 plan?

Sales listed under Thomas Seifert's 10b5-1 sales plan include 10,000 shares on September 17, 2026, for gross proceeds of $3,324,617.00; 10,000 shares on August 17, 2026, for gross proceeds of $3,073,176.00; and 55,000 shares on August 4, 2026, for gross proceeds of $16,516,285.50.

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

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Available on EDGAR 10/19/2026 - 04:25 PM EDT Accepted by SEC EDGAR 10/19/2026 - 04:24 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	0001473289
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	Cloudflare, Inc.
SEC File Number	001-39039
Address of Issuer	101 Townsend Street San Francisco CALIFORNIA 94107
Phone	8889935273
Name of Person for Whose Account the Securities are To Be Sold	THOMAS SEIFERT
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	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	12500	3703750.00	322618775	10/19/2026	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	10/19/2026	Exercise of Stock Options	Issuer			12500	10/19/2026	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	09/17/2026	10000	3324617.00
10b5-1 Sales Plan for THOMAS SEIFERT 101 Townsend Street San Francisco CA 94107	Common	08/17/2026	10000	3073176.00
10b5-1 Sales Plan for THOMAS SEIFERT 101 Townsend Street San Francisco CA 94107	Common	08/04/2026	55000	16516285.50

144: Remarks and Signature

Remarks
Date of Notice	10/19/2026
Date of Plan Adoption or Giving of Instruction, If Relying on Rule 10b5-1	11/20/2025
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/ Thomas Seifert
ATTENTION: Intentional misstatements or omission of facts constitute Federal Criminal Violations (See 18 U.S.C. 1001)