🕵️ Western Digital Corporation ($WDC)
SEC insider & ownership activity, last 12 months · CIK 106040 · every row links its SEC filing
Over the last 12 months insiders sold $74.9M with no open-market buying against it. Tan Irving sold $25.3M through a 10b5-1 trading plan in 39 lots (Nov–Aug). 2 planned sales are pending, the largest $215K (Cynthia Lock Tregillis). No red-flag 8-Ks in the window.
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Monthly net open-market insider flow, last 12 months (up = net buying)
Insider flow
0 buyers, $0 (0 lots) · 10 sellers, $74.9M (224 lots)
| Insider | Buys | Bought | Sells | Sold | Last |
|---|---|---|---|---|---|
| Tan Irving | 0 | – | 39 | $25.3M | Aug 11, 2026 |
| Vidyadhara K. Gubbi | 0 | – | 9 | $12.9M | Sep 4, 2026 |
| Matthew E. Massengill | 0 | – | 11 | $9.6M | Feb 5, 2026 |
| Martin I. Cole | 0 | – | 109 | $8.1M | Jul 28, 2026 |
| Davis Brian Scott | 0 | – | 30 | $7.8M | May 11, 2026 |
| Cynthia Lock Tregillis | 0 | – | 19 | $7.5M | Sep 4, 2026 |
| Stephanie A. Streeter | 0 | – | 3 | $2.5M | Sep 1, 2026 |
| Alexy Kimberly | 0 | – | 2 | $592K | Dec 4, 2025 |
| Bruce E. Kiddoo | 0 | – | 1 | $396K | May 28, 2026 |
| Oulman Roxanne | 0 | – | 1 | $278K | Nov 25, 2025 |
5%+ holders
| Holder | Stake | Class | Schedule | Event | |
|---|---|---|---|---|---|
| Vanguard Capital Management | 7.5% | 13G | Apr 30, 2026 | filing ↗ | |
| FMR LLC | 7.2% | 13G | Aug 6, 2026 | filing ↗ | |
| Abigail P. Johnson | 7.2% | 13G | Aug 6, 2026 | filing ↗ | |
| JPMorgan Chase & Co. | 5.3% | 13G | Apr 22, 2025 | filing ↗ |
Planned insider sales (Form 144)
| Seller | Planned | Approx. sale date | |
|---|---|---|---|
| Vidyadhara K. Gubbi | $825K | Sep 4, 2026 | filing ↗ |
| Cynthia Lock Tregillis | $195K | Sep 4, 2026 | filing ↗ |
| Stephanie A. Streeter | $4.5M | Aug 31, 2026 | filing ↗ |
| Cynthia Lock Tregillis | $482K | Aug 27, 2026 | filing ↗ |
| Cynthia Lock Tregillis | $215K | Aug 26, 2026 | filing ↗ |
| Cynthia Lock Tregillis | $305K | Aug 24, 2026 | filing ↗ |
| Cynthia Lock Tregillis | $112K | Aug 21, 2026 | filing ↗ |
| Irving Tan | $8.9M | Aug 11, 2026 | filing ↗ |
| Cynthia Lock Tregillis | $428K | Jul 21, 2026 | filing ↗ |
| Martin I. Cole | $4.2M | Jun 9, 2026 | filing ↗ |
| Cynthia Lock Tregillis | $236K | Jun 5, 2026 | filing ↗ |
| Vidyadhara K. Gubbi | $1.4M | Jun 1, 2026 | filing ↗ |
| Kiddoo Family Trust U/A DTD 02/07/2012 | $396K | May 28, 2026 | filing ↗ |
| Cynthia Lock Tregillis | $115K | May 27, 2026 | filing ↗ |
| Cynthia Lock Tregillis | $150K | May 22, 2026 | filing ↗ |
| Cynthia Lock Tregillis | $49K | May 21, 2026 | filing ↗ |
| Brian Scott Davis | $5.0M | May 11, 2026 | filing ↗ |
| Vidyadhara K. Gubbi | $2.1M | May 4, 2026 | filing ↗ |
| Irving Tan | $8.2M | May 1, 2026 | filing ↗ |
| Cynthia Lock Tregillis | $137K | Apr 21, 2026 | filing ↗ |
| Vidyadhara K. Gubbi | $2.2M | Mar 6, 2026 | filing ↗ |
| Vidyadhara K. Gubbi | $2.7M | Mar 4, 2026 | filing ↗ |
| Cynthia Lock Tregillis | $2.3M | Mar 4, 2026 | filing ↗ |
| Cynthia Lock Tregillis | $200K | Mar 4, 2026 | filing ↗ |
| Martin I. Cole | $1.7M | Mar 2, 2026 | filing ↗ |
| Cynthia Lock Tregillis | $61K | Feb 26, 2026 | filing ↗ |
| Cynthia Lock Tregillis | $87K | Feb 24, 2026 | filing ↗ |
| Cynthia Lock Tregillis | $37K | Feb 23, 2026 | filing ↗ |
| Brian Scott Davis | $2.8M | Feb 17, 2026 | filing ↗ |
| Cynthia Lock Tregillis | $1.8M | Feb 6, 2026 | filing ↗ |
| Massengill Living Trust | $9.9M | Feb 5, 2026 | filing ↗ |
| Irving Tan | $5.1M | Feb 2, 2026 | filing ↗ |
| Cynthia Lock Tregillis | $102K | Jan 21, 2026 | filing ↗ |
| Vidyadhara K. Gubbi | $1.1M | Dec 5, 2025 | filing ↗ |
| Vidyadhara K. Gubbi | $414K | Dec 5, 2025 | filing ↗ |
| Vidyadhara K. Gubbi | $2.2M | Dec 4, 2025 | filing ↗ |
| Kimberly Alexy | $320K | Dec 4, 2025 | filing ↗ |
| Cynthia Lock Tregillis | $450K | Dec 2, 2025 | filing ↗ |
| Gene M. Zamiska | $128K | Nov 26, 2025 | filing ↗ |
| Roxanne Oulman | $278K | Nov 25, 2025 | filing ↗ |
| Kimberly Alexy | $272K | Nov 25, 2025 | filing ↗ |
| Gene M. Zamiska | $65K | Nov 24, 2025 | filing ↗ |
| Gene M. Zamiska | $65K | Nov 21, 2025 | filing ↗ |
| Martin I. Cole | $2.4M | Nov 5, 2025 | filing ↗ |
| Irving Tan | $3.0M | Nov 3, 2025 | filing ↗ |
Material events (8-K)
| Item | Event date | |
|---|---|---|
| Reg FD disclosure (7.01) | Sep 14, 2026 | filing ↗ |
| Other events (8.01) | Sep 14, 2026 | filing ↗ |
| Financial Statements and Exhibits (9.01) | Sep 14, 2026 | filing ↗ |
| Unregistered equity sale (3.02) | Aug 26, 2026 | filing ↗ |
| Unregistered equity sale (3.02) | Aug 26, 2026 | filing ↗ |
| Other events (8.01) | Aug 26, 2026 | filing ↗ |
| Earnings (2.02) | Aug 5, 2026 | filing ↗ |
| Financial Statements and Exhibits (9.01) | Aug 5, 2026 | filing ↗ |
| Other events (8.01) | Jun 11, 2026 | filing ↗ |
| Unregistered equity sale (3.02) | Jun 2, 2026 | filing ↗ |
| Unregistered equity sale (3.02) | Jun 2, 2026 | filing ↗ |
| Other events (8.01) | Jun 2, 2026 | filing ↗ |
| Officer/director changes (5.02) | May 26, 2026 | filing ↗ |
| Reg FD disclosure (7.01) | May 26, 2026 | filing ↗ |
| Financial Statements and Exhibits (9.01) | May 26, 2026 | filing ↗ |
| Earnings (2.02) | Apr 30, 2026 | filing ↗ |
| Financial Statements and Exhibits (9.01) | Apr 30, 2026 | filing ↗ |
| Charter/bylaw changes (5.03) | Feb 23, 2026 | filing ↗ |
| Other events (8.01) | Feb 23, 2026 | filing ↗ |
| Financial Statements and Exhibits (9.01) | Feb 23, 2026 | filing ↗ |
| Material Modifications to Rights of Security Holders (3.03) | Feb 17, 2026 | filing ↗ |
| Other events (8.01) | Feb 5, 2026 | filing ↗ |
| Earnings (2.02) | Jan 29, 2026 | filing ↗ |
| Financial Statements and Exhibits (9.01) | Jan 29, 2026 | filing ↗ |
| Officer/director changes (5.02) | Nov 20, 2025 | filing ↗ |
| Shareholder vote (5.07) | Nov 20, 2025 | filing ↗ |
| Financial Statements and Exhibits (9.01) | Nov 20, 2025 | filing ↗ |
| Officer/director changes (5.02) | Oct 31, 2025 | filing ↗ |
| Earnings (2.02) | Oct 30, 2025 | filing ↗ |
| Financial Statements and Exhibits (9.01) | Oct 30, 2025 | filing ↗ |