F5 officer Thomas Fountain proposes $3.11M share sale

The issuer’s securities information lists 56,627,182 common shares outstanding.

Available on EDGAR 11/04/2026 - 04:37 PM EST Accepted by SEC EDGAR 11/04/2026 - 04:36 PM EST Learn about SEC filing dates

Rhea-AI Filing Summary

F5, Inc. officer Thomas Fountain reported a proposed sale of 9,387 common shares, with an approximate sale date of November 4, 2026, and an aggregate market value of $3,108,505.05. The securities-to-be-sold entries list 1,210 restricted stock units and 8,177 performance stock units from the issuer. The past-three-months section lists 1,208 common shares sold August 5, 2026, for $500,873.04 in a section labeled “10b5-1 Sales.”

Key Figures

Proposed common shares for sale: 9,387 shares Aggregate market value: $3,108,505.05 Common shares outstanding: 56,627,182 shares +2 more

5 metrics

Proposed common shares for sale 9,387 shares Approximate sale date November 4, 2026

Aggregate market value $3,108,505.05 Proposed sale

Common shares outstanding 56,627,182 shares Issuer securities information

Common shares sold 1,208 shares August 5, 2026; 10b5-1 Sales section

Aggregate value of prior sale $500,873.04 August 5, 2026 sale

Key Terms

Restricted Stock Units, Performance Stock Units, 10b5-1 Sales, Rule 144

4 terms

Restricted Stock Units financial

"Restricted Stock Units"

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.

Performance Stock Units financial

"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.

10b5-1 Sales regulatory

"10b5-1 Sales for THOMAS D FOUNTAIN"

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.

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.

FAQ

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

How many FFIV shares did Thomas Fountain propose to sell?

Thomas Fountain reported a proposed sale of 9,387 common shares, with an approximate sale date of November 4, 2026, and an aggregate market value of $3,108,505.05.

What earlier FFIV stock sale does Thomas Fountain report?

The notice lists 1,208 common shares sold on August 5, 2026, for $500,873.04 in its “10b5-1 Sales” section.

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

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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	0001728330
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	F5, INC.
SEC File Number	000-26041
Address of Issuer	801 5th Avenue Seattle WASHINGTON 98104
Phone	2062725555
Name of Person for Whose Account the Securities are To Be Sold	THOMAS FOUNTAIN
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	9387	3108505.05	56627182	11/04/2026	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	11/01/2026	Restricted Stock Units	Issuer			1210	11/01/2026	N/A
Common	11/01/2026	Performance Stock Units	Issuer			8177	11/01/2026	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
10b5-1 Sales for THOMAS D FOUNTAIN 801 5th Avenue Seattle WA 98104	Common	08/05/2026	1208	500873.04

144: Remarks and Signature

Remarks
Date of Notice	11/04/2026
Date of Plan Adoption or Giving of Instruction, If Relying on Rule 10b5-1	10/29/2025
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 Fountain
ATTENTION: Intentional misstatements or omission of facts constitute Federal Criminal Violations (See 18 U.S.C. 1001)