🕵️ Teradata Corp /DE/ ($TDC)
SEC insider & ownership activity, last 12 months · CIK 816761 · every row links its SEC filing
Over the last 12 months insiders sold $8.3M with no open-market buying against it. Lynrock Lake LP sold $2.5M in discretionary trades (Feb). 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) · 7 sellers, $8.3M (13 lots)
| Insider | Buys | Bought | Sells | Sold | Last |
|---|---|---|---|---|---|
| Lynrock Lake LP | 0 | – | 3 | $2.5M | Feb 11, 2026 |
| Stephen McMillan | 0 | – | 2 | $2.1M | May 12, 2026 |
| Richard J. Petley | 0 | – | 3 | $1.7M | Jun 1, 2026 |
| Michael P. Gianoni | 0 | – | 1 | $749K | Feb 24, 2026 |
| Arora Sumeet | 0 | – | 2 | $577K | May 19, 2026 |
| McElhatton Todd | 0 | – | 1 | $502K | May 22, 2026 |
| Chou Timothy C K | 0 | – | 1 | $191K | Jun 8, 2026 |
5%+ holders
| Holder | Stake | Class | Schedule | Event | |
|---|---|---|---|---|---|
| Blackrock, Inc. | 16.0% | 13G | Jul 30, 2026 | filing ↗ | |
| Vanguard Portfolio Management | 10.6% | 13G | Jul 7, 2026 | filing ↗ | |
| Lynrock Lake LP | 6.6% | 13D | Jul 6, 2026 | filing ↗ | |
| Lynrock Lake Partners LLC | 6.6% | 13D | Jul 6, 2026 | filing ↗ | |
| Paul Cynthia | 6.6% | 13D | Jul 6, 2026 | filing ↗ |
Planned insider sales (Form 144)
| Seller | Planned | Approx. sale date | |
|---|---|---|---|
| Chou Timothy C K | $191K | Jun 8, 2026 | filing ↗ |
| Richard J. Petley | $603K | Jun 1, 2026 | filing ↗ |
| McElhatton Todd | $502K | May 22, 2026 | filing ↗ |
| Arora Sumeet | $495K | May 19, 2026 | filing ↗ |
| Stephen McMillan | $634K | May 12, 2026 | filing ↗ |
| Arora Sumeet | $82K | May 7, 2026 | filing ↗ |
| Richard J. Petley | $1.1M | May 7, 2026 | filing ↗ |
| Stephen McMillan | $1.5M | Feb 26, 2026 | filing ↗ |
| Michael P. Gianoni | $749K | Feb 24, 2026 | filing ↗ |
| Lynrock Lake Master Fund LP | $1.1M | Feb 11, 2026 | filing ↗ |
| Lynrock Lake Master Fund LP | $70K | Feb 11, 2026 | filing ↗ |
| Lynrock Lake Master Fund LP | $300K | Feb 11, 2026 | filing ↗ |
| Lynrock Lake Master Fund LP | $98K | Feb 11, 2026 | filing ↗ |
| Lynrock Lake Master Fund LP | $82K | Feb 11, 2026 | filing ↗ |
| Lynrock Lake Master Fund LP | $95K | Feb 11, 2026 | filing ↗ |
| Lynrock Lake Master Fund LP | $79K | Feb 11, 2026 | filing ↗ |
| Margaret A. Treese | $1.6M | Aug 27, 2025 | filing ↗ |
Material events (8-K)
| Item | Event date | |
|---|---|---|
| Material agreement (1.01) | Jun 24, 2026 | filing ↗ |
| Agreement terminated (1.02) | Jun 24, 2026 | filing ↗ |
| New financial obligation (2.03) | Jun 24, 2026 | filing ↗ |
| Financial Statements and Exhibits (9.01) | Jun 24, 2026 | filing ↗ |
| Officer/director changes (5.02) | May 14, 2026 | filing ↗ |
| Shareholder vote (5.07) | May 14, 2026 | filing ↗ |
| Financial Statements and Exhibits (9.01) | May 14, 2026 | filing ↗ |
| Earnings (2.02) | May 5, 2026 | filing ↗ |
| Financial Statements and Exhibits (9.01) | May 5, 2026 | filing ↗ |
| Officer/director changes (5.02) | Feb 27, 2026 | filing ↗ |
| Other events (8.01) | Feb 19, 2026 | filing ↗ |
| Material agreement (1.01) | Feb 10, 2026 | filing ↗ |
| Financial Statements and Exhibits (9.01) | Feb 10, 2026 | filing ↗ |
| Earnings (2.02) | Feb 10, 2026 | filing ↗ |
| Financial Statements and Exhibits (9.01) | Feb 10, 2026 | filing ↗ |
| Other events (8.01) | Nov 17, 2025 | filing ↗ |
| Financial Statements and Exhibits (9.01) | Nov 17, 2025 | filing ↗ |
| Earnings (2.02) | Nov 4, 2025 | filing ↗ |
| Financial Statements and Exhibits (9.01) | Nov 4, 2025 | filing ↗ |
| Earnings (2.02) | Aug 5, 2025 | filing ↗ |
| Financial Statements and Exhibits (9.01) | Aug 5, 2025 | filing ↗ |