ADTRAN Holdings (ADTN) stock: insider trades, news & valuation
Strong buyingShare price and insider trades
ADTRAN Holdings insider trading at a glance (Oct 9, 2026): in the past 12 months, 3 insiders bought $500K and 3 sold $2.5M of ADTN stock on the open market, including a cluster buy that began Nov 24, 2025.
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ADTN insider buying and selling by quarter
Open-market purchases (green, above the line) and sales (red, below), by trade date.
| Quarter | Bought | Purchases | Sold | Sales |
|---|---|---|---|---|
| Q4 2026 | — | 0 | — | 0 |
| Q3 2026 | $50K | 1 | — | 0 |
| Q2 2026 | — | 0 | $2.4M | 4 |
| Q1 2026 | — | 0 | $148K | 1 |
| Q4 2025 | $450K | 3 | — | 0 |
Valuation, profit and volume
Summary
Over the past 12 months, 3 ADTRAN Holdings, Inc. insiders reported open-market purchases totaling $500K, while 3 insiders reported sales totaling $2.5M. The most recent cluster buy began on Nov 24, 2025, when 3 insiders bought a combined $450K. Among insiders with enough purchase history to measure, Nikos Theodosopoulos (Director) has the highest Insider Score at 63. 3 of 5 recorded sales were made under pre-scheduled Rule 10b5-1 trading plans, which are usually less informative than discretionary sales.
ADTN earnings: how the stock reacted
Each quarterly results release (SEC 8-K Item 2.02), the trend before it, insider trades in the 30 days before, and the 2-day market reaction. “E” marks releases on the chart above.
| Release | 15 days before | Insiders, 30 days before | Reaction (2 days) | Next 30 days |
|---|---|---|---|---|
| Aug 4, 2026 | -23.9% | None | -10.7%S&P +1.6% | -10.2% |
| Jul 22, 2026 | -5.8% | None | -16.4%S&P -1.3% | -23.4% |
| May 5, 2026 | +8.1% | None | -14.3%S&P +2.2% | -2.3% |
| Feb 26, 2026 | +3.3% | None | -4.6%S&P -1.0% | +26.8% |
| Jan 22, 2026 | +1.6% | None | +2.8%S&P +0.6% | +5.4% |
| Nov 4, 2025 | +15.4% | None | -19.5%S&P -0.8% | +1.5% |
| Aug 5, 2025 | +0.6% | None | -8.6%S&P +0.3% | +12.6% |
| Jul 17, 2025 | +5.7% | None | -2.6%S&P +0.5% | -6.1% |
Most companies bar insiders from trading in the weeks before results, so pre-earnings purchases are rare and often made by directors or under pre-set plans. Past reactions don't predict future ones.
Insider transactions
Open-market purchases and sales.
| Filed | Insider | Type | Shares | Price | Value | Since | Score |
|---|---|---|---|---|---|---|---|
| Aug 7SEC | Timothy P SantoCFO | Buy | 6,57959,924 held (+12%) | $7.60 | $50K | -1.8% | — |
| May 22SEC | James Denson Wilson Jr.Chief Revenue Officer | Sell | 9,332143,277 held (−6%) | $14.72 | $137K | -49.3% | — |
| May 11SEC | Christoph GlingenerCTO | Sell Plan | 84,89546,645 held (−65%) | $15.06 | $1.3M | -50.5% | — |
| May 11SEC | Christoph GlingenerCTO | Sell Plan | 41,22046,645 held (−47%) | $14.73 | $607K | -49.4% | — |
| May 11SEC | Christoph GlingenerCTO | Sell Plan | 22,27746,645 held (−32%) | $15.00 | $334K | -50.3% | — |
| Mar 5SEC | Hourigan Rice JacquelineDirector | Sell | 14,40613,809 held (−51%) | $10.29 | $148K | -27.5% | — |
| Dec 1SEC | Nikos TheodosopoulosDirector | Buy | 12,85952,154 held (+33%) | $7.81 | $100K | -4.5% | 63 |
| Dec 1SEC | Timothy P SantoCFO | Buy | 6,15026,594 held (+30%) | $8.02 | $49K | -7.0% | — |
| Nov 25SEC | Thomas R StantonCEO, Chair | Buy | 40,928982,096 held (+4%) | $7.33 | $300K | +1.8% | — |
Insiders at ADTRAN Holdings, Inc.
| Insider | Bought | Sold | Last filing | Score |
|---|---|---|---|---|
| Christoph GlingenerCTO | — | $2.2M | May 11, 2026 | — |
| Thomas R StantonCEO, Chair | $300K | — | Nov 25, 2025 | — |
| Nikos TheodosopoulosDirector | $100K | — | Dec 1, 2025 | 63 |
| Timothy P SantoCFO | $99K | — | Aug 7, 2026 | — |
| Hourigan Rice JacquelineDirector | — | $148K | Mar 5, 2026 | — |
| James Denson Wilson Jr.Chief Revenue Officer | — | $137K | May 22, 2026 | — |
ADTN stock: common questions
Are ADTRAN Holdings, Inc. insiders buying ADTN stock?
In the past 12 months, 3 insiders reported open-market purchases of ADTN worth $500K. The latest was CFO Timothy P Santo bought $50K of ADTN at $7.60.
Are ADTRAN Holdings, Inc. insiders selling ADTN stock?
3 insiders reported sales worth $2.5M over the same period.
Where does this data come from?
Every transaction comes from Form 4 filings that insiders must submit to the SEC within two business days of a trade. We pull them from SEC EDGAR every night.
What is ADTN's 52-week range?
Over the past year ADTN has traded between $6.80 and $19.40. It last closed at $7.46 on Oct 9, 2026.