Guidewire's John Mullen may sell $5.7M in stock

A Guidewire Software executive filed a Rule 144 notice covering 39,683 shares tied to equity award vesting and automatic sell-to-cover tax transactions.

Rhea-AI Filing Summary

Guidewire Software, Inc. (GWRE) has an affiliate, John P. Mullen, filing a notice of proposed resale of its common stock under Rule 144. The notice covers up to 39,683 shares of common stock, with an aggregate market value of $5,733,074.89, to be sold through Morgan Stanley Smith Barney LLC on the NYSE.

The shares relate to multiple RSU and PSU awards scheduled to vest on September 15, 2026, granted between 2022 and 2025. The notice states that the amounts listed as shares to be sold reflect automatic sell-to-cover transactions for tax withholding under Guidewire’s Amended and Restated 2020 Stock Plan.

During the prior three months, John P. Mullen reported sales of 1,800 shares for $339,228 on August 25, 2026 and 16,200 shares for $2,997,000 on August 19, 2026. Guidewire’s common shares outstanding are reported as 81,992,669.

Key Figures

Shares covered by Rule 144 notice: 39,683 shares Aggregate market value of proposed sale: $5,733,074.89 Shares outstanding: 81,992,669 shares +4 more

7 metrics

Shares covered by Rule 144 notice 39,683 shares Proposed Guidewire Software common stock to be sold by John P. Mullen

Aggregate market value of proposed sale $5,733,074.89 Market value of 39,683 GWRE shares in the Rule 144 notice

Shares outstanding 81,992,669 shares Guidewire Software common shares outstanding referenced in the notice

Prior sale on August 25, 2026 1,800 shares for $339,228 Guidewire common stock sold by John P. Mullen in past 3 months

Prior sale on August 19, 2026 16,200 shares for $2,997,000 Guidewire common stock sold by John P. Mullen in past 3 months

Vesting date of RSUs/PSUs September 15, 2026 Date of RSU and PSU vesting related to shares described as acquired as compensation

Date of notice September 17, 2026 Date John P. Mullen signed the Rule 144 notice

Key Terms

Rule 144, sell-to-cover, Amended and Restated 2020 Stock Plan, Restricted Stock Units (RSU), +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.

sell-to-cover financial

"reflect automatic sell-to-cover transactions to satisfy tax withholding obligations"

Sell-to-cover is when part of newly issued or exercised company stock is immediately sold to pay required taxes and fees, so the recipient keeps the remaining shares. For investors this matters because it reduces the number of shares insiders or employees actually hold after a grant, can create small, routine share sales that aren’t signal of cashing out, and slightly increases share supply on the market—like selling a portion of a paycheck to cover the tax bill.

Amended and Restated 2020 Stock Plan financial

"under the Issuer's Amended and Restated 2020 Stock Plan"

Restricted Stock Units (RSU) financial

"Vesting of RSU (Grant Date: 09/15/2022)"

Performance Stock Units (PSU) financial

"Vesting of PSU (Grant Date: 09/13/2023)"

FAQ

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

What does the Form 144 filing for GWRE disclose about John P. Mullen’s plans?

The Form 144 reports that John P. Mullen may sell up to 39,683 shares of Guidewire Software common stock, with an aggregate market value of $5,733,074.89, through Morgan Stanley Smith Barney LLC on the NYSE under Rule 144.

How are the GWRE shares in this Rule 144 notice being acquired?

The shares in the notice are tied to RSU and PSU vesting on September 15, 2026, from awards granted in 2022, 2023, 2024, and 2025, all described as "acquired as compensation" from the issuer.

What is the stated purpose of the GWRE shares to be sold by John P. Mullen?

The notice states the shares listed as “Number of Shares to be Sold” represent automatic sell-to-cover transactions to satisfy tax withholding obligations under Guidewire’s Amended and Restated 2020 Stock Plan for awards vesting on September 15, 2026.

How many GWRE shares has John P. Mullen sold in the last three months?

Over the prior three months, John P. Mullen reported sales of 1,800 shares for $339,228 on August 25, 2026, and 16,200 shares for $2,997,000 on August 19, 2026, all in Guidewire Software common stock.

What is the reported number of GWRE shares outstanding in this Form 144?

The Form 144 lists 81,992,669 shares of Guidewire Software common stock as outstanding. This figure provides context for the relative size of the 39,683 shares covered by the Rule 144 resale notice.

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

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Available on EDGAR 09/17/2026 - 06:49 PM Accepted by SEC EDGAR 09/17/2026 - 06:49 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 Pl, Suite 200 San Mateo CALIFORNIA 94403
Phone	650-357-9100
Name of Person for Whose Account the Securities are To Be Sold	John P 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	President

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 Stock	Morgan Stanley Smith Barney LLC Executive Financial Services 1 New York Plaza 38th Floor New York NY 10004	39683	5733074.89	81992669	09/17/2026	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	09/15/2026	Vesting of RSU (Grant Date: 09/15/2022)	Issuer			1506	09/15/2026	N/A (acquired as compensation)
Common	09/15/2026	Vesting of PSU (Grant Date: 09/13/2023)	Issuer			75211	09/15/2026	N/A (acquired as compensation)
Common	09/15/2026	Vesting of RSU (Grant Date: 09/13/2023)	Issuer			1992	09/15/2026	N/A (acquired as compensation)
Common	09/15/2026	Vesting of RSU (Grant Date: 09/11/2024)	Issuer			1557	09/15/2026	N/A (acquired as compensation)
Common	09/15/2026	Vesting of RSU (Grant Date: 09/11/2024)	Issuer			3322	09/15/2026	N/A (acquired as compensation)
Common	09/15/2026	Vesting of RSU (Grant Date: 09/11/2025)	Issuer			987	09/15/2026	N/A (acquired as compensation)

* 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 P. Mullen c/o Guidewire Software, Inc. 970 Park Pl, Suite 200 San Mateo CA 94403	Common Stock	08/25/2026	1800	339228
John P. Mullen c/o Guidewire Software, Inc. 970 Park Pl, Suite 200 San Mateo CA 94403	Common Stock	08/19/2026	16200	2997000

144: Remarks and Signature

Remarks	The amounts listed under 'Number of Shares to be Sold' reflect automatic sell-to-cover transactions to satisfy tax withholding obligations under the Issuer's Amended and Restated 2020 Stock Plan, representing a portion of the full RSU and PSU vests on September 15, 2026.
Date of Notice	09/17/2026
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 P. Mullen
ATTENTION: Intentional misstatements or omission of facts constitute Federal Criminal Violations (See 18 U.S.C. 1001)