Insider Thomas D. Fountain plans FF5 (NASDAQ: FFIV) Rule 144 stock sale

Rhea-AI Filing Summary

F5, Inc. insider Thomas D. Fountain filed a Form 144 indicating an intent to sell 1,110 shares of common stock. The shares are expected to be sold through Morgan Stanley Smith Barney LLC on or about 01/20/2026 on the NASDAQ market, with an indicated aggregate market value of $291,630.30. The filing notes that 58,089,614 common shares were outstanding.

The 1,110 shares to be sold were acquired on 11/01/2025 as performance shares from the issuer, with the nature of payment listed as not applicable. The filing also lists prior sales by Fountain over the past three months, including multiple 1,110-share transactions and a sale of 8,318 shares of common stock on 11/03/2025 for gross proceeds of $2,077,662.56. This notice confirms compliance with Rule 144 resale requirements and includes a representation that the seller is not aware of undisclosed material adverse information about the company.

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	1110	291630.30	58089614	01/20/2026	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	01/12/2026	1110	294150.00
THOMAS D FOUNTAIN 801 5TH AVENUE Seattle WA 98104	Common	01/05/2026	1110	292806.90

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)

FAQ

What does the FFIV Form 144 filing by Thomas D. Fountain disclose?

The Form 144 filing discloses that Thomas D. Fountain intends to sell 1,110 shares of F5, Inc. (FFIV) common stock under Rule 144. The shares are to be sold through Morgan Stanley Smith Barney LLC on or about 01/20/2026 on the NASDAQ exchange.

How many FFIV shares are planned for sale and what is their market value?

The filing states that 1,110 common shares of F5, Inc. are planned for sale with an indicated aggregate market value of $291,630.30. This figure reflects the market value used for the Rule 144 notice.

When and how did Thomas D. Fountain acquire the FFIV shares being sold?

The 1,110 shares to be sold were acquired on 11/01/2025 as performance shares from the issuer. The form describes the nature of payment as Not Applicable, consistent with equity awards rather than a cash purchase.

How many FFIV shares were outstanding according to this Form 144?

The Form 144 notes that 58,089,614 shares of F5, Inc. common stock were outstanding. This number provides context for the planned 1,110-share sale.

What recent FFIV stock sales by Thomas D. Fountain are listed in the past 3 months?

The filing lists several sales over the prior three months, including a transaction of 8,318 common shares on 11/03/2025 for gross proceeds of $2,077,662.56, and multiple additional sales of 1,110 shares on dates such as 12/29/2025 and 01/12/2026.

What representation does the seller make in this FFIV Form 144 notice?

By signing the notice, the person for whose account the securities are to be sold represents that they do not know any material adverse information about F5, Inc.’s current or prospective operations that has not been publicly disclosed, as required under Rule 144.

Is the FFIV Form 144 sale connected to a Rule 10b5-1 trading plan?

The form includes a field for the Date of Plan Adoption or Giving of Instruction if relying on Rule 10b5-1 and explains that signing the form with that date affirms the same representation as of the plan date, although the specific date is not shown in the provided excerpt.