Guidewire Software Inc
Ownership
Ownership Structure
Who owns Guidewire Software Inc (GWRE)? This page shows the largest institutions and funds, the ownership structure and the latest insider transactions. 90.9% of the shares are freely tradable; institutional investors hold 104.8%.
Largest Shareholders
Institutions
| Name | Stake (%) | Shares | Change (%) | Date |
|---|---|---|---|---|
| BlackRock Inc | 11.20 | 9,327,701 | +5.0 | 03/31/2026 |
| Linonia Partnership LP | 8.33 | 6,933,483 | -9.4 | 06/30/2026 |
| BAMCO Inc | 7.92 | 6,597,453 | +28.2 | 03/31/2026 |
| Vanguard Portfolio Management, LLC | 5.52 | 4,594,571 | +0.0 | 03/31/2026 |
| Vanguard Capital Management, LLC | 4.62 | 3,843,061 | +0.0 | 03/31/2026 |
| Darsana Capital Partners LP | 4.57 | 3,804,000 | -4.9 | 06/30/2026 |
| Massachusetts Financial Services Company | 3.60 | 2,995,337 | -29.7 | 03/31/2026 |
Funds
| Name | Stake (%) | Shares | Change (%) | Date |
|---|---|---|---|---|
| Baron Partners Retail | 4.22 | 3,512,348 | +107.3 | 06/30/2026 |
| iShares Core S&P Mid-Cap ETF | 3.56 | 2,964,566 | +0.0 | 08/31/2026 |
| Vanguard MStar Total Stk Mkt Idx Invest | 3.24 | 2,694,502 | +0.3 | 07/31/2026 |
Largest reported positions according to regulatory filings; stake as a percentage of shares outstanding, change versus the previous filing. Source: fundamentals data.
Insider holdings
| Person | Role | Shares | Value | As of | Type |
|---|---|---|---|---|---|
| Rosenbaum Michael George | Chief Executive Officer | 353,156 | 51,207,620 $ | Sep 15, 2026 | direct |
| Mullen John P | President | 223,330 | 32,382,850 $ | Sep 15, 2026 | direct |
| Cooper Jeffrey Elliott | Chief Financial Officer | 118,595 | 17,196,275 $ | Sep 15, 2026 | direct |
| King James Winston | Chief Admin Officer, Gen Couns | 57,753 | 8,374,185 $ | Sep 15, 2026 | direct |
| Peterson David Franklin | Chief Accounting Officer | 14,138 | 2,050,010 $ | Sep 15, 2026 | direct |
| Vollert Karl Alexander | Director | 578 | 83,810 $ | Aug 12, 2026 | direct |
Holdings as of each person's most recent SEC Form 4 filing — excluding options and RSUs, which are not shares yet. Holdings may have changed between two filings.
Insiders
Insider Transactions
| Date | Person | Role | Type | Shares | Price | Value |
|---|---|---|---|---|---|---|
| Sep 15, 2026 | Mullen John P | President | Other | 75,211 | 0.00 | – |
| Sep 15, 2026 | Cooper Jeffrey Elliott | Chief Financial Officer | Other | 37,826 | 0.00 | – |
| Sep 15, 2026 | Rosenbaum Michael George | Chief Executive Officer | Other | 123,074 | 0.00 | – |
| Sep 15, 2026 | King James Winston | Chief Admin Officer, Gen Couns | Other | 19,701 | 0.00 | – |
| Sep 15, 2026 | Peterson David Franklin | Chief Accounting Officer | Other | 4,351 | 0.00 | – |
| Sep 14, 2026 | Rosenbaum Michael George | Chief Executive Officer | Sell | 1,200 | 145.87 | 175,044 |
| Sep 11, 2026 | Mullen John P | President | Other | 35,004 | 0.00 | – |
| Sep 11, 2026 | Cooper Jeffrey Elliott | Chief Financial Officer | Other | 18,650 | 0.00 | – |
| Sep 11, 2026 | Rosenbaum Michael George | Chief Executive Officer | Other | 45,906 | 0.00 | – |
| Sep 11, 2026 | King James Winston | Chief Admin Officer, Gen Couns | Other | 8,034 | 0.00 | – |
| Sep 8, 2026 | Rosenbaum Michael George | Chief Executive Officer | Sell | 1,200 | 160.52 | 192,624 |
| Aug 31, 2026 | Rosenbaum Michael George | Chief Executive Officer | Sell | 1,200 | 204.44 | 245,328 |
| Aug 27, 2026 | Peterson David Franklin | Chief Accounting Officer | Sell | 2,500 | 200.00 | 500,000 |
| Aug 24, 2026 | Rosenbaum Michael George | Chief Executive Officer | Sell | 1,200 | 187.82 | 225,384 |
| Aug 19, 2026 | Mullen John P | President | Sell | 14,400 | 185.00 | 2,664,000 |
| Aug 17, 2026 | Rosenbaum Michael George | Chief Executive Officer | Sell | 1,200 | 172.88 | 207,456 |
| Aug 12, 2026 | Vollert Karl Alexander | Director | Other | 578 | 0.00 | – |
| Aug 10, 2026 | Rosenbaum Michael George | Chief Executive Officer | Sell | 1,200 | 169.50 | 203,400 |
| Aug 3, 2026 | Rosenbaum Michael George | Chief Executive Officer | Sell | 1,200 | 155.92 | 187,104 |
| Jul 27, 2026 | Rosenbaum Michael George | Chief Executive Officer | Sell | 1,200 | 142.31 | 170,772 |
| Jul 20, 2026 | Rosenbaum Michael George | Chief Executive Officer | Sell | 1,200 | 147.42 | 176,904 |
| Jul 13, 2026 | Rosenbaum Michael George | Chief Executive Officer | Sell | 1,200 | 138.47 | 166,164 |
| Jul 9, 2026 | King James Winston | Chief Admin Officer, Gen Couns | Sell | 1,684 | 130.64 | 219,998 |
| Apr 20, 2026 | Michael George Rosenbaum | CEO | Sell | 1,200 | 139.75 | 167,700 |
Reportable transactions by officers and major shareholders from SEC Form 4 filings. "Other" includes things like stock grants and option exercises without a buy/sell character. View all insider transactions →
Data as of: September 17, 2026 · Source: fundamental data & SEC filings (annual and quarterly reports, 10-K/10-Q)
Note: pure fact-based analysis, not investment advice and not a solicitation to buy or sell. All figures without guarantee.