ADTRAN Inc (ADTN)
Who owns ADTRAN Inc (ADTN)? This page shows the largest institutions and funds, the ownership structure and the latest insider transactions. 97.5% of the shares are freely tradable; institutional investors hold 105.7%.
Ownership Structure
Largest Shareholders
Institutions
| Name | Stake (%) | Shares | Change (%) | Date |
|---|---|---|---|---|
| Vanguard Group Inc | 10.11 | 8,188,496 | -2.3 | 12/31/2025 |
| BlackRock Inc | 9.68 | 7,840,254 | -3.5 | 03/31/2026 |
| Vanguard Portfolio Management, LLC | 5.89 | 4,771,452 | +0.0 | 03/31/2026 |
| Vanguard Capital Management, LLC | 4.23 | 3,426,230 | +0.0 | 03/31/2026 |
| Royce & Associates, LP | 3.86 | 3,127,403 | +20.4 | 03/31/2026 |
| DnB NOR Asset Management (Asia) | 3.86 | 3,123,679 | +0.0 | 03/31/2026 |
| State Street Corp | 2.90 | 2,350,737 | +18.4 | 03/31/2026 |
| William Blair Investment Management, LLC | 2.46 | 1,989,530 | -19.7 | 03/31/2026 |
Funds
| Name | Stake (%) | Shares | Change (%) | Date |
|---|---|---|---|---|
| Vanguard Total Stock Mkt Idx Inv | 3.11 | 2,516,922 | +0.0 | 04/30/2026 |
| DNB Teknologi A | 2.88 | 2,334,501 | +0.0 | 03/31/2026 |
Largest reported positions according to regulatory filings; stake as a percentage of shares outstanding, change versus the previous filing. Source: fundamentals data.
Insider Transactions
| Date | Person | Role | Type | Shares | Price | Value |
|---|---|---|---|---|---|---|
| 24. Jul 2026 | Glingener Christoph | Chief Technology Officer | Other | 9,384 | 0.00 | – |
Reportable transactions by officers and major shareholders from SEC Form 4 filings. "Other" includes things like stock grants and option exercises without a buy/sell character.
View all insider transactions →Data as of: July 31, 2026 · Source: fundamental data & SEC filings (annual and quarterly reports, 10-K/10-Q)
Note: pure fact-based analysis, not investment advice and not a solicitation to buy or sell. All figures without guarantee.