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  4. [Form 4/A] Guidewire Software, Inc. Amended Insider Trading Activity

Guidewire (NYSE: GWRE) president sells 18,000 shares in August trades

Filing Impact
(Neutral)
Filing Sentiment
(Neutral)
Form Type
4/A

Rhea-AI Filing Summary

Guidewire Software, Inc. (GWRE) reported that its President, John P. Mullen, sold a total of 18,000 shares of common stock in two open‑market or private transactions. On August 19, 2026 he sold 16,200 shares at $185.00 per share, and on August 25, 2026 he sold 1,800 shares at $188.46 per share. Both sales were executed under an automatic Rule 10b5‑1 trading plan adopted on October 14, 2025 and amended on January 13, 2026. Post‑transaction share holdings are not stated in this filing.

Positive

  • None.

Negative

  • None.
Insider Mullen John P
Role President
Sold 18,000 shs ($3.34M)
Type Security Shares Price Value
Sale Common Stock F1 1,800 $188.46 $339K
Sale Common Stock F1 16,200 $185.00 $3.00M
Holdings After Transaction: Common Stock — 113,115 shares (Direct)
Footnotes (1)
  1. F1. Automatic sale pursuant to a 10b5-1 Trading Plan adopted by the Reporting Person on October 14, 2025, as amended January 13, 2026.
Shares sold August 19, 2026 16,200 shares of Common Stock Non-derivative sale in open market or private transaction
Sale price August 19, 2026 $185.00 per share Sale of 16,200 shares of Common Stock
Shares sold August 25, 2026 1,800 shares of Common Stock Non-derivative sale in open market or private transaction
Sale price August 25, 2026 $188.46 per share Sale of 1,800 shares of Common Stock
Total shares sold 18,000 shares of Common Stock Aggregate of reported sales in this Form 4/A
10b5-1 Trading Plan adoption date October 14, 2025 Plan governing the automatic sales
10b5-1 Trading Plan amendment date January 13, 2026 Amendment to the trading plan covering these sales
Rule 10b5-1 Trading Plan regulatory
"Automatic sale pursuant to a 10b5-1 Trading Plan adopted by the Reporting Person"
A Rule 10b5-1 trading plan is a pre-arranged schedule that allows company insiders to buy or sell stock at specific times, even if they have inside information. It helps prevent accusations of unfair trading by making these transactions look planned and transparent, rather than sneaky or illegal.
non-derivative financial
"transaction_type": "non-derivative""
open market or private transaction financial
"transaction_code_description": "Sale in open market or private transaction""

FAQ

What insider transactions did GWRE disclose in this amended Form 4?
Guidewire disclosed that President John P. Mullen sold a total of 18,000 shares of common stock in two transactions on August 19, 2026 and August 25, 2026, both reported as sales in open‑market or private transactions.

How many GWRE shares did John P. Mullen sell on each date?
John P. Mullen sold 16,200 shares of Guidewire common stock on August 19, 2026, and 1,800 shares on August 25, 2026, for a total of 18,000 shares reported in this Form 4/A.

At what prices were the GWRE shares sold by John P. Mullen?
The filing reports sales of Guidewire common stock at $185.00 per share on August 19, 2026 and $188.46 per share on August 25, 2026, each described as a sale in open market or private transaction.

Were John P. Mullen’s GWRE stock sales under a Rule 10b5-1 trading plan?
Yes. A footnote states these sales were automatic sales pursuant to a 10b5‑1 Trading Plan adopted by John P. Mullen on October 14, 2025 and amended January 13, 2026, and the Rule 10b5‑1 checkbox is affirmed.

Does the Form 4/A state John P. Mullen’s remaining GWRE holdings after these sales?
No. For each reported transaction, the field for shares beneficially owned following the transaction is left blank, so this amendment does not state John P. Mullen’s post‑transaction holdings.

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Form 4 Insider Transactions: What Each Field Means →
SEC Form 4
FORM 4UNITED STATES SECURITIES AND EXCHANGE COMMISSION
Washington, D.C. 20549

STATEMENT OF CHANGES IN BENEFICIAL OWNERSHIP

Filed pursuant to Section 16(a) of the Securities Exchange Act of 1934
or Section 30(h) of the Investment Company Act of 1940
OMB APPROVAL
OMB Number:3235-0287
Estimated average burden
hours per response:0.5
Check this box if no longer subject to Section 16. Form 4 or Form 5 obligations may continue. See Instruction 1(b).
X
Check this box to indicate that a transaction was made pursuant to a contract, instruction or written plan for the purchase or sale of equity securities of the issuer that is intended to satisfy the affirmative defense conditions of Rule 10b5-1(c). See Instruction 10.
1. Name and Address of Reporting Person*
Mullen John P
(Last)(First)(Middle)
C/O GUIDEWIRE SOFTWARE, INC.
970 PARK PL, SUITE 200
(Street)
SAN MATEO CALIFORNIA 94403
(City)(State)(Zip)
UNITED STATES
(Country)		2. Issuer Name and Ticker or Trading Symbol
Guidewire Software, Inc. [ GWRE ] 		5. Relationship of Reporting Person(s) to Issuer
(Check all applicable)
Director10% Owner
XOfficer (give title below)Other (specify below)
President
2a. Foreign Trading Symbol
3. Date of Earliest Transaction (Month/Day/Year)
08/19/2026		6. Individual or Joint/Group Filing (Check Applicable Line)
XForm filed by One Reporting Person
Form filed by More than One Reporting Person
4. If Amendment, Date of Original Filed (Month/Day/Year)
08/20/2026
Table I - Non-Derivative Securities Acquired, Disposed of, or Beneficially Owned
1. Title of Security (Instr. 3) 2. Transaction Date (Month/Day/Year)2A. Deemed Execution Date, if any (Month/Day/Year)3. Transaction Code (Instr. 8) 4. Securities Acquired (A) or Disposed Of (D) (Instr. 3, 4 and 5) 5. Amount of Securities Beneficially Owned Following Reported Transaction(s) (Instr. 3 and 4) 6. Ownership Form: Direct (D) or Indirect (I) (Instr. 4) 7. Nature of Indirect Beneficial Ownership (Instr. 4)
CodeVAmount(A) or (D)Price
Common Stock08/19/2026S(1)16,200D$185114,915D
Common Stock08/25/2026S(1)1,800D$188.46113,115D
Table II - Derivative Securities Acquired, Disposed of, or Beneficially Owned
(e.g., puts, calls, warrants, options, convertible securities)
1. Title of Derivative Security (Instr. 3) 2. Conversion or Exercise Price of Derivative Security 3. Transaction Date (Month/Day/Year)3A. Deemed Execution Date, if any (Month/Day/Year)4. Transaction Code (Instr. 8) 5. Number of Derivative Securities Acquired (A) or Disposed of (D) (Instr. 3, 4 and 5) 6. Date Exercisable and Expiration Date (Month/Day/Year)7. Title and Amount of Securities Underlying Derivative Security (Instr. 3 and 4) 8. Price of Derivative Security (Instr. 5) 9. Number of derivative Securities Beneficially Owned Following Reported Transaction(s) (Instr. 4) 10. Ownership Form: Direct (D) or Indirect (I) (Instr. 4) 11. Nature of Indirect Beneficial Ownership (Instr. 4)
CodeV(A)(D)Date ExercisableExpiration DateTitleAmount or Number of Shares
Explanation of Responses:
1. Automatic sale pursuant to a 10b5-1 Trading Plan adopted by the Reporting Person on October 14, 2025, as amended January 13, 2026.
Remarks:
By: Winston King, Attorney-in-Fact for John P. Mullen08/26/2026
** Signature of Reporting PersonDate
Reminder: Report on a separate line for each class of securities beneficially owned directly or indirectly.
* If the form is filed by more than one reporting person, see Instruction 4 (b)(v).
** Intentional misstatements or omissions of facts constitute Federal Criminal Violations See 18 U.S.C. 1001 and 15 U.S.C. 78ff(a).
Note: File three copies of this Form, one of which must be manually signed. If space is insufficient, see Instruction 6 for procedure.
Persons who respond to the collection of information contained in this form are not required to respond unless the form displays a currently valid OMB Number.
* Form 4: SEC 1474 (03-26)

Source: View Original Filing on SEC EDGAR