🕵️ International Business Machines Corp ($IBM)
SEC insider & ownership activity, last 12 months · CIK 51143 · every row links its SEC filing
Over the last 12 months insiders sold $5.8M against $417K of open-market buying. Robert D. Thomas sold $5.8M in discretionary trades (Aug). No red-flag 8-Ks in the window.
Monthly net open-market insider flow, last 12 months (up = net buying)
Insider flow
3 buyers, $417K (3 lots) · 1 seller, $5.8M (1 lots)
| Insider | Buys | Bought | Sells | Sold | Last |
|---|---|---|---|---|---|
| Robert D. Thomas | 0 | – | 1 | $5.8M | Aug 26, 2026 |
| David N. Farr | 1 | $304K | 0 | – | Jan 30, 2026 |
| Miebach Michael | 1 | $101K | 0 | – | Feb 25, 2026 |
| Michelle J. Howard | 1 | $12K | 0 | – | Feb 25, 2026 |
5%+ holders
| Holder | Stake | Class | Schedule | Event | |
|---|---|---|---|---|---|
| Vanguard Capital Management | 7.5% | 13G | Apr 30, 2026 | filing ↗ |
Planned insider sales (Form 144)
| Seller | Planned | Approx. sale date | |
|---|---|---|---|
| Robert Thomas | $5.8M | Aug 26, 2026 | filing ↗ |
Material events (8-K)
| Item | Event date | |
|---|---|---|
| Financial Statements and Exhibits (9.01) | Aug 10, 2026 | filing ↗ |
| Earnings (2.02) | Jul 22, 2026 | filing ↗ |
| Financial Statements and Exhibits (9.01) | Jul 22, 2026 | filing ↗ |
| Earnings (2.02) | Jul 14, 2026 | filing ↗ |
| Reg FD disclosure (7.01) | Jul 14, 2026 | filing ↗ |
| Financial Statements and Exhibits (9.01) | Jul 14, 2026 | filing ↗ |
| Material agreement (1.01) | Jun 22, 2026 | filing ↗ |
| New financial obligation (2.03) | Jun 22, 2026 | filing ↗ |
| Financial Statements and Exhibits (9.01) | Jun 22, 2026 | filing ↗ |
| Reg FD disclosure (7.01) | May 28, 2026 | filing ↗ |
| Officer/director changes (5.02) | Apr 28, 2026 | filing ↗ |
| Charter/bylaw changes (5.03) | Apr 28, 2026 | filing ↗ |
| Shareholder vote (5.07) | Apr 28, 2026 | filing ↗ |
| Earnings (2.02) | Apr 22, 2026 | filing ↗ |
| Financial Statements and Exhibits (9.01) | Apr 22, 2026 | filing ↗ |
| Charter/bylaw changes (5.03) | Mar 1, 2026 | filing ↗ |
| Financial Statements and Exhibits (9.01) | Mar 1, 2026 | filing ↗ |
| Financial Statements and Exhibits (9.01) | Jan 29, 2026 | filing ↗ |
| Earnings (2.02) | Jan 28, 2026 | filing ↗ |
| Financial Statements and Exhibits (9.01) | Jan 28, 2026 | filing ↗ |
| Officer/director changes (5.02) | Jan 27, 2026 | filing ↗ |
| Financial Statements and Exhibits (9.01) | Jan 27, 2026 | filing ↗ |
| Reg FD disclosure (7.01) | Oct 22, 2025 | filing ↗ |
| Financial Statements and Exhibits (9.01) | Oct 22, 2025 | filing ↗ |
| Earnings (2.02) | Oct 22, 2025 | filing ↗ |
| Financial Statements and Exhibits (9.01) | Oct 22, 2025 | filing ↗ |