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ADTN ADTRAN Holdings, Inc. Insider Trading

Latest: CTO Sold $2.2M of Shares · May 2026
1 filing analyzed · Latest 2026-05-11
Insider buys
0
Insider sells
1
Unique insiders
1
Direction
Net selling
May 2026
2026-05-11
low
Glingener Christoph Sell
Chief Technology Officer
148,392 shares
$2,219,844
@ $14.96
Significance 4/10

CTO Glingener exercises stock options and immediately sells all shares for net proceeds above exercise value.

Glingener, ADTN's Chief Technology Officer, exercised three tranches of stock options and sold all 148,392 acquired shares within two trading days, realizing roughly $2.2M in proceeds while the stock trades nearly a fifth below its 52-week high. The mechanics are straightforward: he acquired shares at weighted-average prices between $7.01 and $12.17 per share and sold them at prices ranging from $14.73 to $15.06, capturing the spread between strike and market. This is Glingener's first open-market sales in the 36-month window and reflects standard option exercise-and-sell behavior—a liquidity event rather than a discretionary trading signal. The company itself is unprofitable year-to-date, though it has grown revenue substantially, and the stock's recent rally provides the context for why the options became valuable enough to exercise now. Without evidence of prior open-market purchases by this executive, this transaction does not indicate conviction in the company's direction; it is a compensation realization opportunity.

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