Glingener Christoph (CIK 1943622) reported 8 SEC Form 4 insider transactions across 1 companies over the past 18 months (most recent 2026-08-10). Recent activity: Buy ADTN (27,924 shares), Buy ADTN (9,384 shares), Buy ADTN (41,220 shares), Sell ADTN (41,220 shares), Buy ADTN (84,895 shares). Source: SEC Form 4.
| Date | Company | Role | Type | Shares | Value |
|---|---|---|---|---|---|
| 2026-08-10 | ADTRAN Holdings, Inc. (ADTN) | Chief Technology Officer | Buy | 27,924 | $0 |
| 2026-07-28 | ADTRAN Holdings, Inc. (ADTN) | Chief Technology Officer | Buy | 9,384 | $0 |
| 2026-05-11 | ADTRAN Holdings, Inc. (ADTN) | Chief Technology Officer | Buy | 41,220 | $288,952 |
| 2026-05-11 | ADTRAN Holdings, Inc. (ADTN) | Chief Technology Officer | Sell | 41,220 | $607,171 |
| 2026-05-11 | ADTRAN Holdings, Inc. (ADTN) | Chief Technology Officer | Buy | 84,895 | $1.0M |
| 2026-05-11 | ADTRAN Holdings, Inc. (ADTN) | Chief Technology Officer | Sell | 84,895 | $1.3M |
| 2026-05-11 | ADTRAN Holdings, Inc. (ADTN) | Chief Technology Officer | Buy | 22,277 | $271,111 |
| 2026-05-11 | ADTRAN Holdings, Inc. (ADTN) | Chief Technology Officer | Sell | 22,277 | $334,155 |
Source: SEC Form 4 filings · as of 2026-08-10