Form 4 for ADTN ADTRAN Holdings, Inc.
Accepted 2026-05-11 16:00:08 ET · period of report 2026-05-07 · accession 0001193125-26-216692 · SEC index · Original document
Summary rows
Aggregated the way they appear in lists: one row per insider, transaction code and security table.
| X | Filed | Traded | Ticker | Insider | Title | Type | Price | Qty | Owned | ΔOwn | Value |
|---|---|---|---|---|---|---|---|---|---|---|---|
| DMT | 2026-05-11 16:00 | 2026-05-07+ | ADTN | Glingener Christoph | CTO | M - OptEx | $10.74 | +148.4K | 68.9K | New | +$1.59M |
| DMT | 2026-05-11 16:00 | 2026-05-07+ | ADTN | Glingener Christoph | CTO | S - Sale+OE | $14.96 | -148.4K | 46.6K | -76% | -$2.22M |
| DMT | 2026-05-11 16:00 | 2026-05-07+ | ADTN | Glingener Christoph | CTO | M - OptEx | $0.00 | -148.4K | 0 | -100% | $0 |
Purchase Sale Sale after option exercise All abbreviations
Every reported transaction
| # | Table | Security | Date | Code | A/D | Shares | Price | Owned after | Own | Exercise / expiry | Underlying | Footnotes |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| 1 | Common | Common Stock | 2026-05-07 | M | A | 41,220 | $7.01 | 87,865 | D | — | — | (F1) The transactions reported on this Form 4 were effectuated pursuant to a Rule 10b5-1 trading plan adopted by the reporting person on December 12, 2025. |
| 2 | Common | Common Stock | 2026-05-07 | S | D | 41,220 | $14.73 | 46,645 | D | — | — | (F1) The transactions reported on this Form 4 were effectuated pursuant to a Rule 10b5-1 trading plan adopted by the reporting person on December 12, 2025. (F2) The price reported in Column 4 is a weighted average price. These shares were sold in multiple transactions at prices ranging from $14.355 to $15.69, inclusive. The reporting person undertakes to provide to the issuer, any security holder of the issuer, or the staff of the Securities and Exchange Commission, upon request, full information regarding the number of shares sold at each separate price within this range. |
| 3 | Common | Common Stock | 2026-05-07 | M | A | 84,895 | $12.17 | 131,540 | D | — | — | (F1) The transactions reported on this Form 4 were effectuated pursuant to a Rule 10b5-1 trading plan adopted by the reporting person on December 12, 2025. |
| 4 | Common | Common Stock | 2026-05-07 | S | D | 84,895 | $15.06 | 46,645 | D | — | — | (F1) The transactions reported on this Form 4 were effectuated pursuant to a Rule 10b5-1 trading plan adopted by the reporting person on December 12, 2025. (F3) The price reported in Column 4 is a weighted average price. These shares were sold in multiple transactions at prices ranging from $15.00 to $15.69, inclusive. The reporting person undertakes to provide to the issuer, any security holder of the issuer, or the staff of the Securities and Exchange Commission, upon request, full information regarding the number of shares sold at each separate price within this range. |
| 5 | Common | Common Stock | 2026-05-08 | M | A | 22,277 | $12.17 | 68,922 | D | — | — | (F1) The transactions reported on this Form 4 were effectuated pursuant to a Rule 10b5-1 trading plan adopted by the reporting person on December 12, 2025. |
| 6 | Common | Common Stock | 2026-05-08 | S | D | 22,277 | $15.00 | 46,645 | D | — | — | (F1) The transactions reported on this Form 4 were effectuated pursuant to a Rule 10b5-1 trading plan adopted by the reporting person on December 12, 2025. (F4) These shares were sold in a single transaction at $15.00 per share. |
| 7 | Derivative | Stock Option | 2026-05-07 | M | D | 41,220 | $0.00 | 0 | D | $7.01 · — to 2027-05-14 | 41,220 Common Stock | (F1) The transactions reported on this Form 4 were effectuated pursuant to a Rule 10b5-1 trading plan adopted by the reporting person on December 12, 2025. (F5) The stock option vested and was fully exercisable. |
| 8 | Derivative | Stock Options | 2026-05-07 | M | D | 84,895 | $0.00 | 22,277 | D | $12.17 · — to 2028-05-14 | 84,895 Common Stock | (F1) The transactions reported on this Form 4 were effectuated pursuant to a Rule 10b5-1 trading plan adopted by the reporting person on December 12, 2025. (F5) The stock option vested and was fully exercisable. |
| 9 | Derivative | Stock Option | 2026-05-08 | M | D | 22,277 | $0.00 | 0 | D | $12.17 · — to 2028-05-14 | 22,277 Common Stock | (F1) The transactions reported on this Form 4 were effectuated pursuant to a Rule 10b5-1 trading plan adopted by the reporting person on December 12, 2025. (F5) The stock option vested and was fully exercisable. |