Insider plans sale of 1,110 shares under Rule 144

Thomas D. Fountain has filed a notice to sell 1,110 shares of common stock under Rule 144.

Rhea-AI Filing Summary

Thomas D. Fountain has filed a notice to sell 1,110 shares of common stock under Rule 144. The shares are to be sold through Morgan Stanley Smith Barney LLC on the NASDAQ, with an indicated aggregate market value of $294,150.00. The issuer had 58,089,614 common shares outstanding at the time referenced. The shares to be sold were acquired as performance shares from the issuer on 11/01/2025.

Over the prior three months, Fountain has sold additional common shares of the same issuer in multiple transactions. These include, for example, a sale of 8,318 shares on 11/03/2025 for gross proceeds of $2,077,662.56, along with several smaller sales of around 1,100–1,110 shares on various dates in November, December, and early January with disclosed gross proceeds for each trade.

FAQ

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

What does the FFIV Form 144 filing report about upcoming insider sales?

The notice states that Thomas D. Fountain plans to sell 1,110 shares of common stock through Morgan Stanley Smith Barney LLC on the NASDAQ, with an indicated aggregate market value of $294,150.00.

How many FFIV shares are referenced as outstanding in this Form 144?

The filing lists 58,089,614 shares of common stock outstanding for the issuer at the time referenced.

How did the insider acquire the 1,110 FFIV shares to be sold?

The 1,110 common shares to be sold were acquired on 11/01/2025 as performance shares from the issuer, with “Not Applicable” listed as the nature of payment.

When is the planned sale date for the 1,110 FFIV shares in this notice?

The approximate date of sale listed for the 1,110 common shares is 01/12/2026, to be executed on the NASDAQ.

What prior FFIV stock sales by Thomas D. Fountain are disclosed?

The filing details multiple sales over the past three months, including 8,318 shares sold on 11/03/2025 for $2,077,662.56, plus several additional trades of 1,100–1,110 shares in November, December, and early January with stated gross proceeds for each.

Which broker is handling the planned FFIV share sale in this Form 144?

The planned sale of 1,110 common shares is to be handled by Morgan Stanley Smith Barney LLC Executive Financial Services, located at 1 New York Plaza, 8th Floor, New York, NY 10004.

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

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Accepted by SEC EDGAR 01/12/2026 - 04:07 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	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	206-272-5555
Name of Person for Whose Account the Securities are To Be Sold	THOMAS D 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	1110	294150.00	58089614	01/12/2026	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	11/01/2025	Performance Shares	ISSUER			1110	11/01/2025	Not Applicable

* 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
THOMAS D FOUNTAIN 801 5TH AVENUE Seattle WA 98104	Common	12/29/2025	1100	289146.00
THOMAS D FOUNTAIN 801 5TH AVENUE Seattle WA 98104	Common	12/22/2025	1110	286269.00
THOMAS D FOUNTAIN 801 5TH AVENUE Seattle WA 98104	Common	12/15/2025	1110	293883.60
THOMAS D FOUNTAIN 801 5TH AVENUE Seattle WA 98104	Common	12/08/2025	1110	276012.60
THOMAS D FOUNTAIN 801 5TH AVENUE Seattle WA 98104	Common	12/01/2025	1110	263058.90
THOMAS D FOUNTAIN 801 5TH AVENUE Seattle WA 98104	Common	11/24/2025	1110	260755.65
THOMAS D FOUNTAIN 801 5TH AVENUE Seattle WA 98104	Common	11/18/2025	1110	252458.40
THOMAS D FOUNTAIN 801 5TH AVENUE Seattle WA 98104	Common	11/03/2025	8318	2077662.56
THOMAS D FOUNTAIN 801 5TH AVENUE Seattle WA 98104	Common	01/05/2026	1110	292806.90

144: Remarks and Signature

Remarks
Date of Notice	01/12/2026
Date of Plan Adoption or Giving of Instruction, If Relying on Rule 10b5-1	06/13/2025
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 D. Fountain
ATTENTION: Intentional misstatements or omission of facts constitute Federal Criminal Violations (See 18 U.S.C. 1001)