SEC Form 4 · Updated Daily
TDC
— TERADATA CORPORATION OwnershipInsider and institutional ownership derived from SEC Form 4 filings. Click any owner to see their holdings across every company they’ve filed on, and how their position has changed over time.
Current Reporting Owners
| Owner | Role | Shares Owned | As Of | Last Activity |
|---|---|---|---|---|
| NCR CORP | 10%+ Owner | 180,734,530 | 2007-09-29 | J |
| Lynrock Lake LP | 10%+ Owner | 9,406,152 | 2026-02-11 | S |
| LYNROCK LAKE PARTNERS LLC | 10%+ Owner | 9,406,152 | 2026-02-11 | S |
| Paul Cynthia | 10%+ Owner | 9,406,152 | 2026-02-11 | S |
| MCMILLAN STEPHEN | Director · Officer | 752,446 | 2026-09-15 | S |
| KOEHLER MICHAEL | Director · Officer | 640,203 | 2016-03-08 | M |
| LUND VICTOR L | Director | 487,152 | 2020-06-08 | M |
| Ederer John | Officer | 368,426 | 2026-05-18 | F |
| Arora Sumeet | Officer | 287,899 | 2026-05-18 | F |
| Culhane Mark | Director | 270,107 | 2021-05-27 | S |
| Harrington Daniel L | Officer | 266,179 | 2021-03-01 | A |
| Rogers Scot Frazier | Officer | 229,884 | 2026-06-15 | F |
| Brown Scott A | Officer | 194,880 | 2020-07-01 | F |
| Petley Richard J | Officer | 189,561 | 2026-06-01 | S |
| Hutchinson Michael D | Officer | 171,927 | 2026-09-15 | S |
| Cullen-Cote Kathleen R | Officer | 144,462 | 2025-03-06 | F |
| Scheppmann Stephen Mark | Officer | 143,689 | 2017-07-31 | M |
| Fair Robert | Officer | 143,345 | 2016-05-27 | M |
| Treese Margaret A | Officer | 142,253 | 2025-03-06 | F |
| BRAMLEY CLAIRE | Director | 126,072 | 2025-03-10 | S |
| RINGLER JAMES M | Director | 124,010 | 2020-11-19 | G |
| Ratzesberger Oliver | Director · Officer | 121,896 | 2019-03-01 | A |
| Cione Todd | Officer | 119,422 | 2024-03-06 | F |
| Smotherman Charles T | Officer | 114,618 | 2025-03-25 | A |
| Woods Jacqueline D. | Director | 112,626 | 2025-03-06 | F |
| SCHWARZ JOHN | Director | 110,569 | 2026-05-14 | A |
| Nyquist Laura K | Officer | 102,331 | 2020-03-02 | F |
| Wimmer Hermann | Officer | 96,036 | 2015-12-01 | F |
| STAVROPOULOS WILLIAM S | Director | 94,711 | 2020-05-05 | M |
| McDonald Darryl | Officer | 86,369 | 2014-12-01 | A |
| Bacus Lisa R | Director | 86,091 | 2026-08-14 | A |
| Gnau Scott E | Officer | 85,975 | 2015-02-11 | F |
| FU CARY T | Director | 84,534 | 2022-05-10 | A |
| Etherington Martyn | Officer | 84,454 | 2021-03-15 | S |
| BOYKIN EDWARD P | Director | 82,432 | 2016-04-26 | M |
| Langos Bruce | Officer | 78,805 | 2015-02-11 | F |
| Poddar Reema | Director | 76,572 | 2019-12-16 | F |
| Olsen Joanne Beth | Director | 69,001 | 2026-05-14 | A |
| Fishback Daniel R | Director | 67,522 | 2025-05-15 | A |
| Ashton Hillary | Officer | 66,772 | 2024-11-07 | S |
| Nelson Kimberly K. | Director | 64,172 | 2026-08-14 | A |
| KEPLER DAVID E | Director | 58,806 | 2021-02-11 | S |
| PRAHALAD C K | Director | 55,425 | 2008-09-30 | A |
| Davis Saundra | Officer | 47,973 | 2016-02-07 | A |
| Blanton Rocky | Officer | 47,320 | 2015-02-11 | F |
| Gianoni Michael P | Director · Officer | 42,510 | 2026-08-14 | A |
| COOPER NANCY E | Director | 42,480 | 2017-04-19 | A |
| Dinning John | Officer | 40,226 | 2017-12-01 | F |
| CHOU TIMOTHY C K | Director | 39,210 | 2026-06-08 | S |
| Morton Richard A | Officer | 37,182 | 2016-02-08 | A |
| Zoumaras Suzanne C | Officer | 33,759 | 2018-02-15 | F |
| McElhatton Todd | Director | 28,862 | 2026-08-14 | A |
| Tom Eric P | Officer | 21,186 | 2017-11-27 | A |
| Fisher Melissa B | Director | 15,800 | 2026-09-01 | A |
| FIORE PETER L | Director | 9,294 | 2009-04-28 | A |
| Leukert Bernd | Director | 8,330 | 2026-08-01 | A |
Recent Filings
| Date | Owner | Activity | Shares | Price | Owned After |
|---|---|---|---|---|---|
| 2026-09-15 | MCMILLAN STEPHEN | Open-market sale | 10,000 | $30.02 | 752,446 |
| 2026-09-15 | Hutchinson Michael D | Open-market sale | 48,077 | $30.00 | 171,927 |
| 2026-09-01 | Fisher Melissa B | Grant / award | 344 | $0.00 | 15,800 |
| 2026-09-01 | Fisher Melissa B | Grant / award | 619 | $0.00 | 15,456 |
| 2026-08-14 | Nelson Kimberly K. | Grant / award | 2,197 | $0.00 | 64,172 |
| 2026-08-14 | McElhatton Todd | Grant / award | 2,197 | $0.00 | 28,862 |
| 2026-08-14 | Gianoni Michael P | Grant / award | 2,197 | $0.00 | 42,510 |
| 2026-08-14 | Fisher Melissa B | Grant / award | 2,197 | $0.00 | 14,837 |
| 2026-08-14 | Bacus Lisa R | Grant / award | 2,197 | $0.00 | 86,091 |
| 2026-08-01 | Leukert Bernd | — | — | — | 0 |
| 2026-08-01 | Leukert Bernd | Grant / award | 8,330 | $0.00 | 8,330 |
| 2026-06-15 | Rogers Scot Frazier | Tax withholding | 13,247 | $33.62 | 216,637 |
| 2026-06-15 | Rogers Scot Frazier | Tax withholding | 10,266 | $33.62 | 229,884 |
| 2026-06-08 | CHOU TIMOTHY C K | Open-market sale | 5,657 | $33.72 | 39,210 |
| 2026-06-01 | Petley Richard J | Open-market sale | 990 | $35.01 | 188,571 |
| 2026-06-01 | Petley Richard J | Open-market sale | 16,237 | $35.00 | 189,561 |
| 2026-05-22 | McElhatton Todd | Open-market sale | 15,000 | $33.47 | 26,665 |
| 2026-05-19 | Arora Sumeet | Open-market sale | 15,000 | $33.00 | 250,772 |
| 2026-05-18 | Ederer John | Tax withholding | 13,355 | $32.77 | 368,426 |
| 2026-05-18 | Arora Sumeet | Tax withholding | 22,127 | $32.77 | 265,772 |
| 2026-05-18 | Arora Sumeet | Tax withholding | 13,553 | $32.77 | 287,899 |
| 2026-05-14 | McElhatton Todd | Grant / award | 8,790 | $0.00 | 41,665 |
| 2026-05-14 | CHOU TIMOTHY C K | Grant / award | 8,790 | $0.00 | 44,867 |
| 2026-05-14 | SCHWARZ JOHN | Grant / award | 8,790 | $0.00 | 110,569 |
| 2026-05-14 | Fisher Melissa B | Grant / award | 8,790 | $0.00 | 12,640 |
| 2026-05-14 | Olsen Joanne Beth | Grant / award | 8,790 | $0.00 | 69,001 |
| 2026-05-14 | Nelson Kimberly K. | Grant / award | 8,790 | $0.00 | 61,975 |
| 2026-05-14 | Gianoni Michael P | Grant / award | 8,790 | $0.00 | 40,313 |
| 2026-05-14 | Bacus Lisa R | Grant / award | 8,790 | $0.00 | 83,894 |
| 2026-05-13 | Petley Richard J | Tax withholding | 1,829 | $32.70 | 205,798 |
| 2026-05-12 | MCMILLAN STEPHEN | Open-market sale | 20,000 | $31.71 | 762,446 |
| 2026-05-07 | Petley Richard J | Open-market sale | 34,317 | $30.84 | 207,627 |
| 2026-05-07 | Arora Sumeet | Open-market sale | 2,645 | $30.84 | 301,452 |
| 2026-03-09 | MCMILLAN STEPHEN | J | 4,376 | $0.00 | 782,446 |
| 2026-03-06 | Petley Richard J | Tax withholding | 3,180 | $28.02 | 241,944 |
| 2026-03-06 | Hutchinson Michael D | Tax withholding | 3,727 | $28.02 | 220,004 |
| 2026-03-06 | MCMILLAN STEPHEN | Tax withholding | 22,230 | $28.02 | 786,822 |
| 2026-03-03 | Petley Richard J | Tax withholding | 13,309 | $30.36 | 170,867 |
| 2026-03-03 | Hutchinson Michael D | Tax withholding | 15,208 | $30.36 | 157,724 |
| 2026-03-03 | MCMILLAN STEPHEN | Tax withholding | 40,319 | $30.36 | 602,781 |
Source: SEC EDGAR Form 4 filings. For informational purposes only — not investment advice.