ADTRAN Holdings's three largest insider shareholders as of March 23, 2026 are Thomas R Stanton (Chairman Ceo, 955.47K shares), Brian Protiva (Director, 253.55K shares), James Denson Jr Wilson (Chief Revenue Officer, 127.70K shares).
| Holder | Position | Shares (Direct) | Shares (Indirect) | Report Date |
|---|---|---|---|---|
| Thomas R Stanton | Chairman Ceo | 955,471 | 0 | 28 Jan, 2026 |
| Brian Protiva | 253,545 | 0 | 03 Jan, 2024 | |
| James Denson Jr Wilson | Chief Revenue Officer | 127,701 | 0 | 30 Jan, 2026 |
| Balan Nair | 125,373 | 0 | 05 Jan, 2026 | |
| Brian Protiva | 0 | 119,361 | 08 Dec, 2023 | |
| H Fenwick Huss | 107,600 | 0 | 05 Jan, 2026 | |
| Michael Foliano | Chief Financial Officer | 106,986 | 0 | 04 Jan, 2023 |
| Kathryn A Walker | 98,663 | 0 | 05 Jan, 2026 | |
| Gregory James Mccray | 72,893 | 0 | 05 Jan, 2026 | |
| Nikos Theodosopoulos | 65,963 | 0 | 05 Jan, 2026 | |
| Roy J Nichols | 63,870 | 0 | 07 Sep, 2021 | |
| Ulrich Dopfer | Chief Financial Officer | 48,195 | 0 | 28 Jan, 2025 |
| Christoph Glingener | Chief Technology Officer | 46,645 | 0 | 28 Jan, 2025 |
| Eduard Scheiterer | Svp, Research Development | 40,027 | 0 | 02 Dec, 2021 |
| Hourigan Rice Jacqueline | 0 | 39,345 | 04 Jan, 2023 | |
| Timothy P Santo | Svp Of Finance; Cfo | 25,093 | 0 | 23 Mar, 2026 |
| Hourigan Rice Jacqueline | 13,809 | 0 | 05 Mar, 2026 | |
| Johanna Hey | 8,294 | 0 | 21 Sep, 2023 | |
| James Denson Jr Wilson | Chief Revenue Officer | 0 | 4,117 | 11 Jul, 2022 |
| Michael Foliano | Chief Financial Officer | 0 | 249 | 06 Sep, 2022 |
* Please note that the shares above only reflect shares from the fund portfolio and the institutional portfolio. Shares from the personal portfolio are excluded from this Institutional Ownership Page. See these insiders' latest transactions here on Insider Page.
| Transaction Date | Insider Name | Security Class | Transaction Type | Shares Traded | Price | Shares Remaining | Ownership | Code |
|---|---|---|---|---|---|---|---|---|
| 19 Mar, 2026 | Timothy P Santo | Common Stock | D | 1,501 | $11.90 | 25,093 | D | F |
| 04 Mar, 2026 | Hourigan Rice Jacqueline | Common Stock | D | 14,406 | $10.29 | 13,809 | D | S |
| 26 Jan, 2026 | James Denson Jr Wilson | Common Stock | D | 1,309 | $9.24 | 127,701 | D | F |
| 26 Jan, 2026 | James Denson Jr Wilson | Common Stock | A | 3,777 | $0.00 | 129,010 | D | A |
| 26 Jan, 2026 | Thomas R Stanton | Common Stock | A | 27,973 | $0.00 | 967,878 | D | A |
| 26 Jan, 2026 | James Denson Jr Wilson | Common Stock | D | 1,087 | $9.24 | 127,923 | D | F |
| 26 Jan, 2026 | Thomas R Stanton | Common Stock | D | 12,407 | $9.24 | 955,471 | D | F |
| 24 Jan, 2026 | Thomas R Stanton | Common Stock | D | 17,535 | $9.55 | 954,314 | D | F |
| 24 Jan, 2026 | James Denson Jr Wilson | Common Stock | D | 1,227 | $9.55 | 126,231 | D | F |
| 26 Jan, 2026 | Thomas R Stanton | Common Stock | D | 14,409 | $9.73 | 939,905 | D | F |
| 26 Jan, 2026 | James Denson Jr Wilson | Common Stock | D | 998 | $9.73 | 125,233 | D | F |
| 20 Jan, 2026 | Thomas R Stanton | Common Stock | D | 10,247 | $9.24 | 971,849 | D | F |
| 20 Jan, 2026 | James Denson Jr Wilson | Common Stock | D | 765 | $9.24 | 127,458 | D | F |
| 31 Dec, 2025 | Hourigan Rice Jacqueline | Common Stock | A | 13,809 | $0.00 | 28,215 | D | A |
| 31 Dec, 2025 | H Fenwick Huss | Common Stock | A | 13,809 | $0.00 | 107,600 | D | A |
| 31 Dec, 2025 | Gregory James Mccray | Common Stock | A | 13,809 | $0.00 | 72,893 | D | A |
| 31 Dec, 2025 | Balan Nair | Common Stock | A | 13,809 | $0.00 | 125,373 | D | A |
| 31 Dec, 2025 | Kathryn A Walker | Common Stock | A | 13,809 | $0.00 | 98,663 | D | A |
| 31 Dec, 2025 | Nikos Theodosopoulos | Common Stock | A | 13,809 | $0.00 | 65,963 | D | A |
| 26 Nov, 2025 | Nikos Theodosopoulos | Common Stock | A | 12,859 | $7.81 | 52,154 | D | P |