# ADTRAN Holdings, Inc. (ADTN) insider trading

> In the 12 months to Nov 10, 2026, 3 ADTN insiders reported open-market sales of $2.5M across 3 filings; 3 insiders bought $1.2M.

Canonical: https://massive.com/quote/adtn/insider-trading
Latest filing: 2026-11-09 (last 12 months; source: SEC EDGAR)
Source: Massive (https://massive.com/docs/llms.txt)

## Summary

| Measure | Value | Detail |
| --- | --- | --- |
| Open-market sales | $2.5M | 3 filings · 3 insiders |
| Open-market purchases | $1.2M | 6 filings |
| Pre-arranged sales (10b5-1) | 1 of 3 | $2.2M of $2.5M sold (89%) |

## Open-market trades by insider

| Insider | Role | Sold | Bought | Filings | Pre-arranged (10b5-1) | Last filed |
| --- | --- | --- | --- | --- | --- | --- |
| Christoph Glingener | Chief Technology Officer | $2.2M | — | 1 | 100% of sales | 2026-05-11 |
| Thomas R. Stanton | Chairman & CEO | — | $900.9K | 2 | — | 2026-11-09 |
| Timothy P. Santo | SVP of Finance; CFO | — | $173.5K | 3 | — | 2026-11-09 |
| Hourigan Rice Jacqueline | Director | $148.2K | — | 1 | — | 2026-03-05 |
| James Denson Wilson Jr. | Chief Revenue Officer | $137.4K | — | 1 | — | 2026-05-22 |
| Nikos Theodosopoulos | Director | — | $100.4K | 1 | — | 2025-12-01 |

## Open-market trades by filing

9 filings in the last 12 months, newest first.

| Filed | Traded | Insider | Role | Type | Shares | Avg price | Value | Held after | Filing |
| --- | --- | --- | --- | --- | --- | --- | --- | --- | --- |
| 2026-11-09 | 2026-11-06 | Thomas R. Stanton | Chairman & CEO | Purchase | 150,000 | $4.01 | $600.9K | 1,410,890 | — |
| 2026-11-09 | 2026-11-06 | Timothy P. Santo | SVP of Finance; CFO | Purchase | 17,820 | $4.16 | $74.2K | 77,744 | — |
| 2026-08-07 | 2026-08-06 | Timothy P. Santo | SVP of Finance; CFO | Purchase | 6,579 | $7.60 | $50.0K | 59,924 | — |
| 2026-05-22 | 2026-05-20 | James Denson Wilson Jr. | Chief Revenue Officer | Sale | 9,332 | $14.72 | $137.4K | 143,277 | — |
| 2026-05-11 | 2026-05-07 | Christoph Glingener | Chief Technology Officer | Sale (10b5-1) | 148,392 | $14.96 | $2.2M | 46,645 | — |
| 2026-03-05 | 2026-03-04 | Hourigan Rice Jacqueline | Director | Sale | 14,406 | $10.29 | $148.2K | 13,809 | — |
| 2025-12-01 | 2025-11-26 | Nikos Theodosopoulos | Director | Purchase | 12,859 | $7.81 | $100.4K | 52,154 | — |
| 2025-12-01 | 2025-11-28 | Timothy P. Santo | SVP of Finance; CFO | Purchase | 6,150 | $8.02 | $49.3K | 26,594 | — |
| 2025-11-25 | 2025-11-24 | Thomas R. Stanton | Chairman & CEO | Purchase | 40,928 | $7.33 | $300.0K | 982,096 | — |

## Other insider activity (not market trades)

- Option exercises: 5 records
- Tax withholding: 12 records
- Grants and awards: 16 records
- Gifts: 1 record

Reported on Form 4 but not purchases or sales in the market, so not counted in the totals above.

## How to read this page

- **Open-market purchase or sale**: A buy or sell of the company's stock at market price. Grants, option exercises, shares withheld for tax, gifts and employee stock plan purchases are listed separately and not counted.
- **Pre-arranged (10b5-1)**: The insider marked the filing as made under a trading plan set up in advance (SEC Rule 10b5-1). The mark covers the whole filing, and an unmarked filing may still be under a plan.
- **Filing date**: Insiders have two business days to report a trade. Totals and the chart use the filing date, when the trade became public.

## FAQ

### Has ADTRAN Holdings, Inc.'s CEO sold stock?

No. Thomas R. Stanton (CEO) made no open-market sales filed as CEO in the last 12 months.

### How current is ADTN’s insider data?

These are ADTN Form 4 filings from the last year, refreshed daily. The Massive Form 4 API has the full, continuously updated record.

### What counts as an open-market buy or sell?

Only purchases and sales at the market price. Option exercises, grants, gifts, and shares withheld for taxes are reported on Form 4 but are left out of the buy and sell totals.

## Live data

This page joins two Massive endpoints: Form 4 filings and daily prices. The ADTN Form 4 request:

- `GET https://api.massive.com/stocks/filings/vX/form-4?tickers=ADTN&filing_date.gte=2025-11-10&sort=filing_date.desc&limit=500`

Requests need a Massive API key. API reference for agents: https://massive.com/docs/llms.txt. Connect an AI agent through the Massive MCP server: https://massive.com/docs/ai-tools.

## Related

- [ADTRAN Holdings, Inc. (ADTN) stock price](https://massive.com/quote/adtn.md)
- [Recent insider trading](https://massive.com/quote/insider-trading.md)
- [Markets overview](https://massive.com/quote/index.md)

Nothing here is investment advice. Data and content are provided for informational purposes under the Massive Terms of Service: https://massive.com/terms