SEC Form 4 · Updated Daily
ADTN
— ADTRAN HOLDINGS, INC. 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 |
|---|---|---|---|---|
| Smith Linda Jones | Reporting Owner | 3,006,836 | 2009-06-29 | S |
| Smith Mark Clay | 10%+ Owner | 3,006,836 | 2009-06-29 | S |
| SMITH MARK C | Director | 2,998,800 | 2007-02-21 | G |
| STANTON THOMAS R | Director · Officer | 1,126,553.51 | 2026-04-01 | A |
| Protiva Brian | Director | 253,545.14 | 2023-12-31 | A |
| Wilson James Denson Jr | Officer | 143,277.486 | 2026-05-20 | S |
| Foliano Michael | Officer | 127,157.37 | 2022-12-31 | F |
| Nair Balan | Director | 125,373 | 2025-12-31 | A |
| HUSS H FENWICK | Director | 107,600 | 2025-12-31 | A |
| Walker Kathryn A | Director | 98,663 | 2025-12-31 | A |
| NORTH JAMES L | Director | 91,785 | 2013-12-31 | A |
| WINDHAM DANNY J | Director · Officer | 86,359 | 2007-02-08 | M |
| Glingener Christoph | Officer | 83,953 | 2026-08-10 | A |
| McCray Gregory James | Director | 72,892.938 | 2025-12-31 | A |
| Theodosopoulos Nikos | Director | 65,963 | 2025-12-31 | A |
| NICHOLS ROY J | Director | 63,870.56 | 2021-09-02 | M |
| MARKS WILLIAM L | Director | 61,505 | 2018-12-31 | A |
| Santo Timothy P | Officer | 59,924 | 2026-08-06 | P |
| Dopfer Ulrich | Officer | 49,362 | 2025-01-24 | A |
| Scheiterer Eduard | Officer | 40,027.29 | 2021-11-30 | A |
| Whalen Daniel T | Director | 29,700 | 2020-02-18 | P |
| Melone Anthony J. | Director | 28,808 | 2019-12-31 | A |
| RAMAGE EVERETTE R | Officer | 22,242 | 2007-04-20 | M |
| MATTHEWS JAMES E | Director | 17,250 | 2015-04-24 | M |
| McInnis Jeffrey F | Officer | 16,411.42 | 2020-03-10 | A |
| ANDERSON RICHARD A | Director | 14,780 | 2006-02-01 | X |
| Jacqueline Hourigan Rice | Director | 13,809 | 2026-03-04 | S |
| Shannon Roger D | Officer | 12,809 | 2019-10-16 | S |
| Heering Kevin P. | Officer | 12,017 | 2017-11-17 | A |
| Neville John | Officer | 10,606 | 2018-11-09 | A |
| Hey Johanna | Director | 8,294 | 2023-09-19 | F |
| LOCKE P STEVEN | Officer | 7,330 | 2011-02-08 | M |
| IRELAND ROSS K | Director | 5,790.78 | 2013-10-08 | M |
| DelSanto Anne | Director | 4,399 | 2026-07-01 | A |
| Marsh Charles E. | Officer | 3,280 | 2017-11-11 | A |
| FREDRICKSON ROBERT A | Officer | 2,577 | 2014-11-26 | M |
| SCHNEIDER KEVIN W | Officer | 53.74 | 2013-10-21 | W |
| Conger Robert | Officer | 0 | 2022-07-08 | D |
| Centis Ronald | Officer | 0 | 2022-07-08 | D |
| Kimpe Marc | Officer | 0 | 2022-07-08 | D |
| Harris Ray | Officer | 0 | 2022-07-08 | D |
| Schansman Raymond R | Officer | 0 | 2017-10-27 | I |
Recent Filings
| Date | Owner | Activity | Shares | Price | Owned After |
|---|---|---|---|---|---|
| 2026-08-10 | Glingener Christoph | Grant / award | 27,924 | $0.00 | 83,953 |
| 2026-08-06 | Santo Timothy P | Open-market buy | 6,579 | $7.60 | 59,924 |
| 2026-07-24 | Glingener Christoph | Grant / award | 9,384 | $0.00 | 56,029 |
| 2026-07-01 | DelSanto Anne | — | — | — | 0 |
| 2026-07-01 | DelSanto Anne | Grant / award | 4,399 | $0.00 | 4,399 |
| 2026-05-20 | Wilson James Denson Jr | Gift | 10,469 | $0.00 | 132,808.486 |
| 2026-05-20 | Wilson James Denson Jr | Open-market sale | 9,332 | $14.72 | 143,277.486 |
| 2026-05-08 | Glingener Christoph | Option exercise (derivative) | 22,277 | $0.00 | 0 |
| 2026-05-08 | Glingener Christoph | Open-market sale | 22,277 | $15.00 | 46,645 |
| 2026-05-08 | Glingener Christoph | Option exercise | 22,277 | $12.17 | 68,922 |
| 2026-05-07 | Glingener Christoph | Option exercise (derivative) | 84,895 | $0.00 | 22,277 |
| 2026-05-07 | Glingener Christoph | Option exercise (derivative) | 41,220 | $0.00 | 0 |
| 2026-05-07 | Glingener Christoph | Option exercise | 84,895 | $12.17 | 131,540 |
| 2026-05-07 | Glingener Christoph | Open-market sale | 41,220 | $14.73 | 46,645 |
| 2026-05-07 | Glingener Christoph | Option exercise | 41,220 | $7.01 | 87,865 |
| 2026-04-01 | STANTON THOMAS R | Grant / award | 170,723 | $0.00 | 1,126,553.51 |
| 2026-04-01 | Santo Timothy P | Grant / award | 28,252 | $0.00 | 53,345 |
| 2026-04-01 | Wilson James Denson Jr | Grant / award | 24,908 | $0.00 | 152,609.486 |
| 2026-03-19 | Santo Timothy P | Tax withholding | 1,501 | $11.90 | 25,093 |
| 2026-03-04 | Jacqueline Hourigan Rice | Open-market sale | 14,406 | $10.29 | 13,809 |
| 2026-01-26 | STANTON THOMAS R | Tax withholding | 14,409 | $9.73 | 939,904.51 |
| 2026-01-26 | Wilson James Denson Jr | Tax withholding | 998 | $9.73 | 125,233.486 |
| 2026-01-26 | STANTON THOMAS R | Tax withholding | 12,407 | $9.24 | 955,470.51 |
| 2026-01-26 | STANTON THOMAS R | Grant / award | 27,973 | $0.00 | 967,877.51 |
| 2026-01-26 | Wilson James Denson Jr | Tax withholding | 1,087 | $9.24 | 127,923.486 |
| 2026-01-26 | Wilson James Denson Jr | Grant / award | 3,777 | $0.00 | 129,010.486 |
| 2026-01-26 | Wilson James Denson Jr | Tax withholding | 1,309 | $9.24 | 127,701.486 |
| 2026-01-24 | STANTON THOMAS R | Tax withholding | 17,535 | $9.55 | 954,313.51 |
| 2026-01-24 | Wilson James Denson Jr | Tax withholding | 1,227 | $9.55 | 126,231.486 |
| 2026-01-20 | STANTON THOMAS R | Tax withholding | 10,247 | $9.24 | 971,848.51 |
| 2026-01-20 | Wilson James Denson Jr | Tax withholding | 765 | $9.24 | 127,458.486 |
| 2025-12-31 | Jacqueline Hourigan Rice | Grant / award | 13,809 | $0.00 | 28,215 |
| 2025-12-31 | HUSS H FENWICK | Grant / award | 13,809 | $0.00 | 107,600 |
| 2025-12-31 | Nair Balan | Grant / award | 13,809 | $0.00 | 125,373 |
| 2025-12-31 | McCray Gregory James | Grant / award | 13,809 | $0.00 | 72,892.938 |
| 2025-12-31 | Theodosopoulos Nikos | Grant / award | 13,809 | $0.00 | 65,963 |
| 2025-12-31 | Walker Kathryn A | Grant / award | 13,809 | $0.00 | 98,663 |
| 2025-11-28 | Santo Timothy P | Open-market buy | 6,150 | $8.02 | 26,594 |
| 2025-11-26 | Theodosopoulos Nikos | Open-market buy | 12,859 | $7.81 | 52,154 |
| 2025-11-24 | STANTON THOMAS R | Open-market buy | 40,928 | $7.33 | 982,095.51 |
Source: SEC EDGAR Form 4 filings. For informational purposes only — not investment advice.