// company-profile
ADTRAN Holdings, Inc.
ADTNExchangeNasdaqSectorTelephone & Telegraph ApparatusFilings91Insiders13
// api This ADTRAN Holdings, Inc. insider-trading data is served live by the Form4API insider trading API. Get the same data via API.
// activity-summary
No insider transactions in the last 30 days.
// 90-day insight
Over the last 90 days, ADTRAN Holdings, Inc. insiders bought $0 (3 transactions) and sold $137K (1 transaction).
- Most active insider: Glingener Christoph with 9 transactions totaling $3.8M.
- Largest single sale: $1.3M by Glingener Christoph on May 7, 2026.
- 75% of recent sales were pre-scheduled 10b5-1 trades — typically less informative than open-market activity.
Activity skews bullish — buys outpace sales.
Institutional Ownership
Top 13F-HR holders of ADTRAN Holdings, Inc. as of 2026-03-31
Total reported AUM
$850.4M
QoQ change
+65.0%
Reporting period
2026-03-31
#1
VANGUARD CAPITAL MANAGEMENT LLC
CIK 2100119
$43.1M
3.4M shares
#2
ROYCE & ASSOCIATES LP
CIK 906304
$39.3M
3.1M shares
#3
DNB Asset Management AS
CIK 1456670
$39.3M
3.1M shares
Data source: SEC Form 13F-HR filings. Joined with insider activity above — see who's loading up institutionally while insiders are trading. Full 13F-HR API →
Insider Transactions
Sourced from SEC EDGAR Form 4 filings. Updated hourly.
| Date | Insider | Company | Type | Shares | Price | Value |
|---|---|---|---|---|---|---|
| May 20, 2026 | Wilson James Denson Jr | ADTN | Sale | 9,332 | $14.72 | $137K |
| May 20, 2026 | Wilson James Denson Jr | ADTN | Gift | 10,469 | $0.00 | $0K |
| May 8, 2026 | Glingener Christoph | ADTN | Sale10b5 | 22,277 | $15.00 | $334K |
| May 8, 2026 | Glingener Christoph | ADTN | Option Exercise10b5 | 22,277 | $0.00 | $0K |
| May 8, 2026 | Glingener Christoph | ADTN | Option Exercise10b5 | 22,277 | $12.17 | $271K |
45 more transactions hidden
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