Guidewire Software (NYSE: GWRE) exec to sell 16,200 vested shares

Rhea-AI Filing Summary

Guidewire Software, Inc. (GWRE) received a notice that officer John Mullen intends to sell shares of the company’s common stock under Rule 144. The planned sale is up to 16,200 shares through Morgan Stanley Smith Barney LLC, with an indicated aggregate market value of $2,997,000.00.

The notice lists 83,256,364 common shares outstanding as context. The shares to be sold were acquired upon the vesting of Restricted Stock and Performance Shares during the period from September 15, 2025 through June 15, 2026. Over the prior three months, John Mullen previously sold 4,292 shares for proceeds of $509,644.96.

Key Figures

Shares to be sold: 16,200 shares Aggregate market value of shares to be sold: $2,997,000.00 Shares outstanding: 83,256,364 shares +4 more

7 metrics

Shares to be sold 16,200 shares Planned Rule 144 sale of Guidewire common stock by John Mullen

Aggregate market value of shares to be sold $2,997,000.00 Value associated with the 16,200 shares in the planned sale

Shares outstanding 83,256,364 shares Outstanding Guidewire common shares listed in the notice

Shares sold in past 3 months 4,292 shares Common shares sold by John Mullen on June 16, 2026

Proceeds from prior sale $509,644.96 Total value of 4,292 shares sold on June 16, 2026

Vesting period for awards 09/15/2025–06/15/2026 Period during which Restricted Stock and Performance Shares vested

Date of Notice 08/19/2026 Date on which the Form 144 notice was signed/dated

Key Terms

Rule 144, Restricted Stock, Performance Shares, aggregate market value, +1 more

5 terms

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.

Restricted Stock financial

"The securities to be sold were acquired upon the vesting of Restricted Stock and Performance Shares"

Shares granted to an individual that carry limits on transfer or sale until certain conditions are met, such as staying with the company for a set time or hitting performance targets. Think of them as a locked gift that gradually opens; for investors they matter because they affect how many shares may enter the market later, signal management incentives and potential dilution, and reveal confidence in future company performance.

Performance Shares financial

"The securities to be sold were acquired upon the vesting of Restricted Stock and Performance Shares"

Performance shares are a type of company stock given to executives or employees that only become theirs if the company meets specific goals, like hitting certain profits or growth targets. They motivate leaders to work toward the company’s success, because their additional shares depend on achieving these results.

aggregate market value financial

"Common | Morgan Stanley Smith Barney LLC ... | 16200 | 2997000.00 | 83256364"

Aggregate market value is the combined price you would pay to buy all outstanding shares of a company or all companies in a group at current market prices — essentially the sum of each stock’s market capitalization. It matters to investors because it shows the overall size and weight of an investment or sector (like the total cost to buy every piece of a puzzle), helps compare scale across companies or markets, and influences index composition and risk exposure.

securities to be sold financial

"The securities to be sold were acquired upon the vesting of Restricted Stock"

FAQ

What does John Mullen’s Form 144 filing mean for Guidewire Software (GWRE)?

The filing states that officer John Mullen plans to sell up to 16,200 GWRE common shares under Rule 144. These shares were acquired from vested Restricted Stock and Performance Shares between September 15, 2025 and June 15, 2026.

How many Guidewire Software (GWRE) shares are covered by this Form 144 notice?

The notice covers up to 16,200 shares of GWRE common stock. It also reports an aggregate market value of $2,997,000.00 for these shares, to be sold through Morgan Stanley Smith Barney LLC on the NYSE.

What prior stock sales by John Mullen in GWRE are disclosed in this Form 144?

The filing discloses that on June 16, 2026, John Mullen sold 4,292 GWRE common shares for total proceeds of $509,644.96. This transaction is reported as part of securities sold during the past three months.

How many Guidewire Software (GWRE) shares are shown as outstanding in the Form 144?

The notice lists 83,256,364 GWRE common shares as outstanding. This figure provides context for the planned sale of 16,200 shares and does not represent additional shares being issued.

How were the GWRE shares that John Mullen plans to sell obtained?

The filing states the securities to be sold were acquired upon vesting of Restricted Stock and Performance Shares. The vesting period ran from September 15, 2025 through June 15, 2026, after which the shares became eligible for resale.

Which broker is handling John Mullen’s planned sale of GWRE shares under Rule 144?

The planned sale is to be executed through Morgan Stanley Smith Barney LLC Executive Financial Services. The broker’s office is at 1 New York Plaza, and the shares are listed for trading on the NYSE.

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

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Available on EDGAR 08/19/2026 - 04:12 PM Accepted by SEC EDGAR 08/19/2026 - 04:10 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	0001917389
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	GUIDEWIRE SOFTWARE, INC.
SEC File Number	001-35394
Address of Issuer	970 Park Place, Suite 200 San Mateo CALIFORNIA 94403
Phone	(650) 357-9100
Name of Person for Whose Account the Securities are To Be Sold	JOHN MULLEN
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	16200	2997000.00	83256364	08/19/2026	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	09/15/2025	Restricted Stock and Performance Shares	Issuer			16200	09/15/2025	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
JOHN MULLEN 970 Park Place, Suite 200 San Mateo CA 94403	Common	06/16/2026	4292	509644.96

144: Remarks and Signature

Remarks	The securities to be sold were acquired upon the vesting of Restricted Stock and Performance Shares during the period of 09/15/2025 through 06/15/2026.
Date of Notice	08/19/2026
Date of Plan Adoption or Giving of Instruction, If Relying on Rule 10b5-1	01/13/2026
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/ John Patrick Mullen
ATTENTION: Intentional misstatements or omission of facts constitute Federal Criminal Violations (See 18 U.S.C. 1001)