🕵️ Guidewire Software, Inc. ($GWRE)
SEC insider & ownership activity, last 12 months · CIK 1528396 · every row links its SEC filing
Over the last 12 months insiders sold $46.0M with no open-market buying against it. Mike Rosenbaum sold $21.8M through a program of 31 sale notices averaging $177K (Aug–Jul). 1 planned sale is pending, the largest $149K (Mike Rosenbaum). No red-flag 8-Ks in the window.
🚨 3 signals active —
planned-vs-executed verdicts, pre-event flags, and cluster context live in the
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Monthly net open-market insider flow, last 12 months (up = net buying)
Insider flow
0 buyers, $0 (0 lots) · 6 sellers, $46.0M (96 lots)
| Insider | Buys | Bought | Sells | Sold | Last |
|---|---|---|---|---|---|
| Mike Rosenbaum | 0 | – | 55 | $21.8M | Jul 27, 2026 |
| John P. Mullen | 0 | – | 9 | $10.3M | Jun 16, 2026 |
| Jeffrey Cooper | 0 | – | 13 | $7.7M | Jun 22, 2026 |
| King James Winston | 0 | – | 13 | $5.2M | Jul 9, 2026 |
| Peterson David Franklin | 0 | – | 5 | $832K | Jun 16, 2026 |
| David S Bauer | 0 | – | 1 | $115K | Oct 1, 2025 |
5%+ holders
| Holder | Stake | Class | Schedule | Event | |
|---|---|---|---|---|---|
| Baron Capital Group, Inc. | 10.8% | 13G | Jul 2, 2026 | filing ↗ | |
| Ronald Baron | 10.8% | 13G | Jul 2, 2026 | filing ↗ | |
| Blackrock, Inc. | 10.2% | 13G | Jul 2, 2025 | filing ↗ | |
| Bamco Inc /NY/ | 9.6% | 13G | Jul 2, 2026 | filing ↗ | |
| Linonia Partners Fund LP | 9.0% | 13G | May 15, 2026 | filing ↗ | |
| The Linonia Partnership LP | 9.0% | 13G | May 15, 2026 | filing ↗ | |
| The Linonia Partnership GP LLC | 9.0% | 13G | May 15, 2026 | filing ↗ | |
| Philip Uhde | 9.0% | 13G | May 15, 2026 | filing ↗ | |
| Vanguard Portfolio Management | 5.5% | 13G | Apr 29, 2026 | filing ↗ | |
| Vanguard Capital Management | 5.3% | 13G | Apr 30, 2026 | filing ↗ | |
| Baron Capital Management, Inc. | exited | 13G | Jul 2, 2026 | filing ↗ |
Planned insider sales (Form 144)
| Seller | Planned | Approx. sale date | |
|---|---|---|---|
| Mike Rosenbaum | $171K | Jul 27, 2026 | filing ↗ |
| Mike Rosenbaum | $177K | Jul 20, 2026 | filing ↗ |
| Mike Rosenbaum | $166K | Jul 13, 2026 | filing ↗ |
| James W King | $220K | Jul 9, 2026 | filing ↗ |
| Mike Rosenbaum | $158K | Jul 6, 2026 | filing ↗ |
| Mike Rosenbaum | $149K | Jun 29, 2026 | filing ↗ |
| Jeffrey Cooper | $142K | Jun 22, 2026 | filing ↗ |
| Mike Rosenbaum | $127K | Jun 22, 2026 | filing ↗ |
| John P. Mullen | $510K | Jun 16, 2026 | filing ↗ |
| Jeffrey Elliott Cooper | $308K | Jun 16, 2026 | filing ↗ |
| Michael George Rosenbaum | $692K | Jun 16, 2026 | filing ↗ |
| James Winston King | $119K | Jun 16, 2026 | filing ↗ |
| David F. Peterson | $29K | Jun 16, 2026 | filing ↗ |
| Mike Rosenbaum | $149K | Jun 15, 2026 | filing ↗ |
| Mike Rosenbaum | $163K | Jun 8, 2026 | filing ↗ |
| Mike Rosenbaum | $191K | Jun 1, 2026 | filing ↗ |
| Mike Rosenbaum | $166K | May 26, 2026 | filing ↗ |
| Mike Rosenbaum | $154K | May 18, 2026 | filing ↗ |
| Mike Rosenbaum | $164K | May 11, 2026 | filing ↗ |
| Mike Rosenbaum | $170K | May 4, 2026 | filing ↗ |
| Mike Rosenbaum | $166K | Apr 27, 2026 | filing ↗ |
| Mike Rosenbaum | $168K | Apr 20, 2026 | filing ↗ |
| Mike Rosenbaum | $143K | Apr 13, 2026 | filing ↗ |
| Mike Rosenbaum | $181K | Apr 6, 2026 | filing ↗ |
| Mike Rosenbaum | $175K | Mar 30, 2026 | filing ↗ |
| Mike Rosenbaum | $187K | Mar 23, 2026 | filing ↗ |
| John P. Mullen | $1.1M | Mar 17, 2026 | filing ↗ |
| Jeffrey Elliott Cooper | $317K | Mar 17, 2026 | filing ↗ |
| Michael G. Rosenbaum | $776K | Mar 17, 2026 | filing ↗ |
| James Winston King | $164K | Mar 17, 2026 | filing ↗ |
| David F. Peterson | $45K | Mar 17, 2026 | filing ↗ |
| Mike Rosenbaum | $192K | Mar 16, 2026 | filing ↗ |
| Jeffrey Cooper | $755K | Mar 13, 2026 | filing ↗ |
| Mike Rosenbaum | $200K | Mar 9, 2026 | filing ↗ |
| Mike Rosenbaum | $173K | Mar 2, 2026 | filing ↗ |
| Mike Rosenbaum | $151K | Feb 23, 2026 | filing ↗ |
| Mike Rosenbaum | $152K | Feb 17, 2026 | filing ↗ |
| Mike Rosenbaum | $153K | Feb 9, 2026 | filing ↗ |
| Lavin Paul | $613K | Feb 4, 2026 | filing ↗ |
| Mike Rosenbaum | $168K | Feb 2, 2026 | filing ↗ |
| Mike Rosenbaum | $192K | Jan 26, 2026 | filing ↗ |
| Mike Rosenbaum | $188K | Jan 20, 2026 | filing ↗ |
| Jeffrey Cooper | $39K | Jan 13, 2026 | filing ↗ |
| Mike Rosenbaum | $217K | Jan 13, 2026 | filing ↗ |
| Mike Rosenbaum | $287K | Dec 29, 2025 | filing ↗ |
| Mike Rosenbaum | $281K | Dec 22, 2025 | filing ↗ |
| Jeffrey Cooper | $240K | Dec 18, 2025 | filing ↗ |
| James W King | $363K | Dec 18, 2025 | filing ↗ |
| John P Mullen | $1.5M | Dec 16, 2025 | filing ↗ |
| Jeffrey Elliott Cooper | $552K | Dec 16, 2025 | filing ↗ |
Material events (8-K)
| Item | Event date | |
|---|---|---|
| Officer/director changes (5.02) | Jul 17, 2026 | filing ↗ |
| Financial Statements and Exhibits (9.01) | Jul 17, 2026 | filing ↗ |
| Earnings (2.02) | Jun 4, 2026 | filing ↗ |
| Financial Statements and Exhibits (9.01) | Jun 4, 2026 | filing ↗ |
| Earnings (2.02) | Mar 5, 2026 | filing ↗ |
| Financial Statements and Exhibits (9.01) | Mar 5, 2026 | filing ↗ |
| Other events (8.01) | Jan 8, 2026 | filing ↗ |
| Financial Statements and Exhibits (9.01) | Jan 8, 2026 | filing ↗ |
| Shareholder vote (5.07) | Dec 15, 2025 | filing ↗ |
| Earnings (2.02) | Dec 3, 2025 | filing ↗ |
| Financial Statements and Exhibits (9.01) | Dec 3, 2025 | filing ↗ |
| Earnings (2.02) | Sep 4, 2025 | filing ↗ |
| Financial Statements and Exhibits (9.01) | Sep 4, 2025 | filing ↗ |
| Officer/director changes (5.02) | Jul 24, 2025 | filing ↗ |