As of September 29, 2026, the three largest insider holders of TDC are Lake Lp Lynrock (TenPercentOwner, 9.35Mn shares), Stephen Mcmillan (President And Ceo, 752.45K shares), John Ederer (Chief Financial Officer, 368.43K shares).
| # | Insider | Position | Direct | Indirect | Total | Share of Insiders | Last Filed |
|---|---|---|---|---|---|---|---|
| 1 | Lake Lp Lynrock | TenPercentOwner | 0 | 9,354,676 | 9,354,676 | 73.5% | 13 Feb, 2026 |
| 2 | Stephen Mcmillan | President And Ceo | 752,446 | 0 | 752,446 | 5.9% | 17 Sep, 2026 |
| 3 | John Ederer | Chief Financial Officer | 368,426 | 0 | 368,426 | 2.9% | 20 May, 2026 |
| 4 | Sumeet Arora | Chief Product Officer | 250,772 | 0 | 250,772 | 2.0% | 20 May, 2026 |
| 5 | Scot Frazier Rogers | Chief Administrative Officer | 216,637 | 0 | 216,637 | 1.7% | 17 Jun, 2026 |
| 6 | Richard J Petley | Chief Revenue Officer | 188,571 | 0 | 188,571 | 1.5% | 02 Jun, 2026 |
| 7 | Michael D Hutchinson | Chief Operating Officer | 171,927 | 0 | 171,927 | 1.4% | 17 Sep, 2026 |
| 8 | Kathleen R Cullen-Cote | Chief People Officer | 142,707 | 0 | 142,707 | 1.1% | 10 Mar, 2025 |
| 9 | Margaret A Treese | Chief Legal Officer | 142,253 | 0 | 142,253 | 1.1% | 10 Mar, 2025 |
| 10 | Todd Cione | Chief Revenue Officer | 119,422 | 0 | 119,422 | 0.9% | 08 Mar, 2024 |
| 11 | Charles T Smotherman | Interim Chief Financial Ofcr | 114,618 | 0 | 114,618 | 0.9% | 27 Mar, 2025 |
| 12 | Jacqueline D. Woods | Chief Marketing Officer | 112,626 | 0 | 112,626 | 0.9% | 10 Mar, 2025 |
| 13 | John Schwarz | Director | 110,569 | 0 | 110,569 | 0.9% | 18 May, 2026 |
| 14 | Claire Bramley | Chief Financial Officer | 105,833 | 0 | 105,833 | 0.8% | 11 Mar, 2025 |
| 15 | Lisa R Bacus | Director | 86,091 | 0 | 86,091 | 0.7% | 18 Aug, 2026 |
| 16 | Cary T Fu | Director | 84,534 | 0 | 84,534 | 0.7% | 12 May, 2022 |
| 17 | Joanne Beth Olsen | Director | 69,001 | 0 | 69,001 | 0.5% | 18 May, 2026 |
| 18 | Daniel R Fishback | Director | 67,522 | 0 | 67,522 | 0.5% | 19 May, 2025 |
| 19 | Hillary Ashton | Chief Product Officer | 66,772 | 0 | 66,772 | 0.5% | 08 Nov, 2024 |
| 20 | Kimberly K. Nelson | Director | 64,172 | 0 | 64,172 | 0.5% | 18 Aug, 2026 |
| 21 | Michael P Gianoni | Director | 42,510 | 0 | 42,510 | 0.3% | 18 Aug, 2026 |
| 22 | Timothy C K Chou | Director | 39,210 | 0 | 39,210 | 0.3% | 10 Jun, 2026 |
| 23 | Todd Mcelhatton | Director | 28,862 | 0 | 28,862 | 0.2% | 18 Aug, 2026 |
| 24 | Melissa B Fisher | Director | 15,800 | 0 | 15,800 | 0.1% | 03 Sep, 2026 |
| 25 | Bernd Leukert | Director | 8,330 | 0 | 8,330 | 0.1% | 04 Aug, 2026 |
Each row is that insider’s most recently reported position, from Form 4 filings over the last 60 months — which is why this total does not tie to the quarterly series above, where a quarter counts only the insiders who filed in it. Shares held through a fund or institutional portfolio are counted on the institutional ownership page instead.
| Date | Insider | Position | Transaction | Shares | Price | Value | Shares Held After | Ownership |
|---|---|---|---|---|---|---|---|---|
| 15 Sep, 2026 | Stephen Mcmillan | President And Ceo | Disposed S | 10,000 | $30.02 | $300.17K | 752,446 | Direct |
| 15 Sep, 2026 | Michael D Hutchinson | Chief Operating Officer | Disposed S | 48,077 | $30.00 | $1.44Mn | 171,927 | Direct |
| 01 Sep, 2026 | Melissa B Fisher | Director | Acquired A | 619 | $0.00 | $0 | 15,456 | Direct |
| 01 Sep, 2026 | Melissa B Fisher | Director | Acquired A | 344 | $0.00 | $0 | 15,800 | Direct |
| 14 Aug, 2026 | Melissa B Fisher | Director | Acquired A | 2,197 | $0.00 | $0 | 14,837 | Direct |
| 14 Aug, 2026 | Todd Mcelhatton | Director | Acquired A | 2,197 | $0.00 | $0 | 28,862 | Direct |
| 14 Aug, 2026 | Kimberly K. Nelson | Director | Acquired A | 2,197 | $0.00 | $0 | 64,172 | Direct |
| 14 Aug, 2026 | Michael P Gianoni | Director | Acquired A | 2,197 | $0.00 | $0 | 42,510 | Direct |
| 14 Aug, 2026 | Lisa R Bacus | Director | Acquired A | 2,197 | $0.00 | $0 | 86,091 | Direct |
| 01 Aug, 2026 | Bernd Leukert | Director | Acquired A | 8,330 | $0.00 | $0 | 8,330 | Direct |
| 15 Jun, 2026 | Scot Frazier Rogers | Chief Administrative Officer | Disposed F | 10,266 | $33.62 | $345.14K | 229,884 | Direct |
| 15 Jun, 2026 | Scot Frazier Rogers | Chief Administrative Officer | Disposed F | 13,247 | $33.62 | $445.36K | 216,637 | Direct |
| 08 Jun, 2026 | Timothy C K Chou | Director | Disposed S | 5,657 | $33.72 | $190.75K | 39,210 | Direct |
| 01 Jun, 2026 | Richard J Petley | Chief Revenue Officer | Disposed S | 16,237 | $35.00 | $568.30K | 189,561 | Direct |
| 01 Jun, 2026 | Richard J Petley | Chief Revenue Officer | Disposed S | 990 | $35.01 | $34.66K | 188,571 | Direct |
| 22 May, 2026 | Todd Mcelhatton | Director | Disposed S | 15,000 | $33.47 | $502.02K | 26,665 | Direct |
| 18 May, 2026 | John Ederer | Chief Financial Officer | Disposed F | 13,355 | $32.77 | $437.64K | 368,426 | Direct |
| 18 May, 2026 | Sumeet Arora | Chief Product Officer | Disposed F | 13,553 | $32.77 | $444.13K | 287,899 | Direct |
| 18 May, 2026 | Sumeet Arora | Chief Product Officer | Disposed F | 22,127 | $32.77 | $725.10K | 265,772 | Direct |
| 19 May, 2026 | Sumeet Arora | Chief Product Officer | Disposed S | 15,000 | $33.00 | $495.00K | 250,772 | Direct |