Guidewire Software officer proposes $999K stock sale

John Mullen's prior sales are listed for September 17, August 25 and August 19, 2026, each with a share count and aggregate value.

Rhea-AI Filing Summary

Guidewire Software, Inc. officer John Mullen reported a proposed sale of 5,400 common shares, with an aggregate market value of $999,000.00 and an approximate sale date of October 20, 2026. Morgan Stanley Smith Barney LLC is listed as broker and NYSE as the exchange. The securities listed also include 3,600 common shares identified as restricted stock and 1,800 common shares identified as performance shares.

Key Figures

Proposed sale: 5,400 common shares Aggregate market value of proposed sale: $999,000.00 Past sale: 39,683 common shares +5 more

8 metrics

Proposed sale 5,400 common shares Approximate sale date October 20, 2026

Aggregate market value of proposed sale $999,000.00 Proposed sale

Past sale 39,683 common shares September 17, 2026

Aggregate market value $5,733,076.76 September 17, 2026 past sale

Past sale 1,800 common shares August 25, 2026

Aggregate market value $339,228.00 August 25, 2026 past sale

Past sale 16,200 common shares August 19, 2026

Aggregate market value $2,997,000.00 August 19, 2026 past sale

Key Terms

Rule 144, Restricted Stock, Performance Shares, Aggregate Market Value

4 terms

Rule 144 regulatory

"sales required by paragraph (e) 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 technical

"Restricted Stock"

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 technical

"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

"Aggregate Market Value"

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.

FAQ

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

What shares does GWRE officer John Mullen plan to sell?

John Mullen reported a proposed sale of 5,400 common shares with an aggregate market value of $999,000.00 and an approximate sale date of October 20, 2026. Morgan Stanley Smith Barney LLC is listed as broker, and NYSE is listed as the exchange.

What recent GWRE stock sales did John Mullen report?

During the past three months, John Mullen reported sales of 39,683 shares for $5,733,076.76 on September 17, 2026; 1,800 shares for $339,228.00 on August 25, 2026; and 16,200 shares for $2,997,000.00 on August 19, 2026.

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

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Available on EDGAR 10/20/2026 - 04:50 PM EDT Accepted by SEC EDGAR 10/20/2026 - 04:50 PM EDT 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	5400	999000.00	81992669	10/20/2026	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	Restricted Stock	ISSUER			3600	09/15/2026	Not Applicable
Common	09/15/2025	Performance Shares	ISSUER			1800	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	09/17/2026	39683	5733076.76
JOHN MULLEN 970 Park Place, Suite 200 San Mateo CA 94403	Common	08/25/2026	1800	339228.00
JOHN MULLEN 970 Park Place, Suite 200 San Mateo CA 94403	Common	08/19/2026	16200	2997000.00

144: Remarks and Signature

Remarks
Date of Notice	10/20/2026
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)