ADTN — ADTRAN Holdings, Inc.
Price · 2024-08-26 → 2026-08-21
499 daily closes shownAnonymous view is capped at two years of history. A free account extends it to five, and Pro opens the whole archive back to 2016-01-04.
Performance
Technicals
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Measured signals that fired on ADTN
| date | signal | measured base rate |
|---|---|---|
| 2026-08-06 | Fair value gap, bearish structure | -0.45% over 21 days · t = -3.29 · n = 108,591 statistically distinguishable from its control group |
| 2026-07-16 | Fair value gap, bearish structure | -0.45% over 21 days · t = -3.29 · n = 108,591 statistically distinguishable from its control group |
| 2026-06-04 | Fair value gap, bearish structure | -0.45% over 21 days · t = -3.29 · n = 108,591 statistically distinguishable from its control group |
| 2026-05-27 | Fair value gap, bullish structure | -0.67% over 21 days · t = -6.43 · n = 111,973 statistically distinguishable from its control group |
| 2026-05-05 | Fair value gap, bearish structure | -0.45% over 21 days · t = -3.29 · n = 108,591 statistically distinguishable from its control group |
| 2026-04-06 | Equal highs taken out structure | -0.70% over 21 days · t = -8.28 · n = 68,636 statistically distinguishable from its control group |
Excess return against a matched control group, on a point-in-time universe that includes delisted companies. Most families do not survive that. How the measurement works →
Insider transactions (Form 4)
| date | insider | what | shares | price | value |
|---|---|---|---|---|---|
| 2026-08-10 | Glingener Christoph Chief Technology Officer | Grant or award | 27.9K | 0.00 | 0 |
| 2026-08-06 | Santo Timothy P SVP of Finance; CFO | Open-market purchase | 6.6K | 7.60 | 50.0K |
| 2026-07-24 | Glingener Christoph Chief Technology Officer | Grant or award | 9.4K | 0.00 | 0 |
| 2026-07-01 | DelSanto Anne Director | Grant or award | 4.4K | 0.00 | 0 |
| 2026-05-20 | Wilson James Denson Jr Chief Revenue Officer | Open-market sale | 9.3K | 14.72 | 137.4K |
| 2026-05-20 | Wilson James Denson Jr Chief Revenue Officer | Gift | 10.5K | 0.00 | 0 |
| 2026-05-08 | Glingener Christoph Chief Technology Officer | Open-market sale 10b5-1 plan | 22.3K | 15.00 | 334.2K |
| 2026-05-08 | Glingener Christoph Chief Technology Officer | Option exercise 10b5-1 plan | 22.3K | 12.17 | 271.1K |
| 2026-05-07 | Glingener Christoph Chief Technology Officer | Open-market sale 10b5-1 plan | 84.9K | 15.06 | 1.3M |
| 2026-05-07 | Glingener Christoph Chief Technology Officer | Option exercise 10b5-1 plan | 84.9K | 12.17 | 1.0M |
Open-market purchases (code P) are the informative ones. Grants, option exercises and tax withholding are compensation mechanics, not decisions. How to read a Form 4 →
Largest institutional holders
| manager | value | shares |
|---|---|---|
| BlackRock, Inc. | 98.6M | 7.8M |
| VANGUARD PORTFOLIO MANAGEMENT LLC | 60.0M | 4.8M |
| VANGUARD CAPITAL MANAGEMENT LLC | 43.1M | 3.4M |
| ROYCE & ASSOCIATES LP | 39.3M | 3.1M |
| DNB Asset Management AS | 39.3M | 3.1M |
| STATE STREET CORP | 29.6M | 2.4M |
| WILLIAM BLAIR INVESTMENT MANAGEMENT, LLC | 25.0M | 2.0M |
| MILLENNIUM MANAGEMENT LLC | 23.9M | 1.9M |
| MORGAN STANLEY | 23.1M | 1.8M |
| GEODE CAPITAL MANAGEMENT, LLC | 22.9M | 1.8M |
13F positions as of 2026-03-31, filed up to 45 days after quarter end. Long-only US equity — shorts and derivatives never appear. What 13F does and does not show →
Short selling
This is off-exchange short volume, not short interest: it is flow, not position, and 40–50% is normal because market makers short to fill your buy. Why that number misleads →
Recent headlines
- Adtran Holdings, Inc. (ADTN) filed form 8-K · 2026-08-10 · SEC EDGAR
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