ADTN ADTRAN Holdings, Inc.

NASDAQ
$7.09

ADTRAN Holdings, Inc. (ADTN) Insider Activity

What the officers, directors and large holders did with their own shares. Only open-market purchases and sales count toward the totals — grants, option exercises and shares withheld for tax are compensation mechanics, not decisions, and they're listed separately below.

30D 90D 6M 1Y
Insider signal In line Selling ran in line with ADTN's own trailing one-year pace, with 89% of sale value under a prearranged plan.
Cluster activity 0 buyers in the last 30 days 1 buyer in the last 90 days 0 sellers in the last 90 days
Insiders buying
3
4 transactions
Insiders selling
3
5 transactions
Purchases
$499.8K
66,516 shares
Sales
$2.5M
172,130 shares
Net activity
-$2.0M
purchases less sales

How much of that selling was preplanned? 89% planned / 11% discretionary

10b5-1 plan sales $2.2M 3 transactions · 148,392 shares
Discretionary sales $285.6K 2 transactions · 23,738 shares

Largest single sale: $1.3M.

Where they traded

Buy Sell Dot area is proportional to transaction value.

Last open-market purchase: August 6, 2026 , by Santo Timothy P .

Recent open-market activity

Date Insider Role Action Shares Price Value Held after
Santo Timothy P SVP of Finance; CFO Buy 6,579 $7.60 $50.0K 59,924
Wilson James Denson Jr Chief Revenue Officer Sell 9,332 $14.72 $137.4K 143,277 −6.1% of holding
Glingener Christoph Chief Technology Officer Sell 10b5-1 22,277 $15.00 $334.2K 46,645 −32.3% of holding
Glingener Christoph 2 fills Chief Technology Officer Sell 10b5-1 126,115 $14.95 $1.9M 46,645 −73% of holding
Jacqueline Hourigan Rice Director Sell 14,406 $10.29 $148.2K 13,809 −51.1% of holding
Santo Timothy P SVP of Finance; CFO Buy 6,150 $8.02 $49.3K 26,594
Theodosopoulos Nikos Director Buy 12,859 $7.81 $100.4K 52,154
STANTON THOMAS R Chairman & CEO Buy 40,928 $7.33 $300.0K 982,096

Form 4s are due within two business days of a transaction, so this is close to real time — unlike the quarterly 13F data on the Institutional tab. A single large sale often reflects a prearranged 10b5-1 plan rather than a fresh view, so read a pattern of sales rather than any one of them.