CTO at ADTRAN (NASDAQ: ADTN) sells 148K shares after option exercise
Rhea-AI Filing Summary
ADTRAN Holdings Chief Technology Officer Christoph Glingener reported a series of option exercises and related share sales in ADTRAN Holdings, Inc. common stock. On May 7 and 8, 2026, he exercised stock options covering a total of 148,392 shares at exercise prices of $7.01 and $12.17 per share, then sold the same number of shares in open-market transactions at weighted average prices in the mid‑teens per share, including a single trade at $15.00 per share. The transactions were executed under a Rule 10b5-1 trading plan adopted on December 12, 2025. Following these trades, he directly owns 46,645 common shares and holds remaining stock options tied to 85,383 underlying shares at a $19.08 exercise price expiring on May 14, 2029.
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Insider Trade Summary 10b5-1
Exercise and Sale: 148,392 shares ($627K approx. pre-tax spread)
Exercise and Sale
10 txns
Insider
Glingener Christoph
Role
Chief Technology Officer
Sold
148,392 shs ($2.22M)
Approx. gross sale proceeds
$2.22M
Approx. exercise cost
$1.59M
Approx. pre-tax spread
$627K
| Type | Security | Shares | Price | Value |
|---|---|---|---|---|
| Exercise | Stock Option | 22,277 | $0.00 | $0.00 |
| Exercise | Common Stock | 22,277 | $12.17 | $271K |
| Sale | Common Stock | 22,277 | $15.00 | $334K |
| Exercise | Stock Option | 41,220 | $0.00 | $0.00 |
| Exercise | Stock Options | 84,895 | $0.00 | $0.00 |
| Exercise | Common Stock | 41,220 | $7.01 | $289K |
| Sale | Common Stock | 41,220 | $14.73 | $607K |
| Exercise | Common Stock | 84,895 | $12.17 | $1.03M |
| Sale | Common Stock | 84,895 | $15.06 | $1.28M |
| holding | Stock Option | -- | -- | -- |
Holdings After Transaction:
Stock Option — 85,383 shares (Direct);
Stock Options — 22,277 shares (Direct);
Common Stock — 46,645 shares (Direct)
Footnotes (6)
- F1. The transactions reported on this Form 4 were effectuated pursuant to a Rule 10b5-1 trading plan adopted by the reporting person on December 12, 2025.
- F2. The price reported in Column 4 is a weighted average price. These shares were sold in multiple transactions at prices ranging from $14.355 to $15.69, inclusive. The reporting person undertakes to provide to the issuer, any security holder of the issuer, or the staff of the Securities and Exchange Commission, upon request, full information regarding the number of shares sold at each separate price within this range.
- F3. The price reported in Column 4 is a weighted average price. These shares were sold in multiple transactions at prices ranging from $15.00 to $15.69, inclusive. The reporting person undertakes to provide to the issuer, any security holder of the issuer, or the staff of the Securities and Exchange Commission, upon request, full information regarding the number of shares sold at each separate price within this range.
- F4. These shares were sold in a single transaction at $15.00 per share.
- F5. The stock option vested and was fully exercisable.
- F6. The stock option vests on May 15, 2026, which is the fourth anniversary of the date of the grant.
Key Figures
Shares sold: 148,392 shares
Option exercise prices: $7.01 and $12.17 per share
Sale price range: $14.355–$15.69 per share
+5 more
8 metrics
Shares sold
148,392 shares
Total common shares sold in open-market transactions on May 7-8, 2026
Option exercise prices
$7.01 and $12.17 per share
Exercise prices for stock options converted into common shares
Sale price range
$14.355–$15.69 per share
Weighted average sale price ranges for multiple transactions
Single sale price
$15.00 per share
Price for a single reported common stock sale
Shares held after transactions
46,645 shares
Direct ADTRAN common stock ownership following all reported trades
Remaining option exercise price
$19.08 per share
Exercise price of remaining stock option position expiring May 14, 2029
Remaining underlying option shares
85,383 shares
Underlying common shares for remaining stock option holding
Net buy/sell shares
-148,392 shares
Net share change across buy/sell activity, reported as net-sell
Key Terms
Rule 10b5-1 trading plan, weighted average price, stock option, open-market sale
4 terms
Rule 10b5-1 trading plan regulatory
"The transactions reported on this Form 4 were effectuated pursuant to a Rule 10b5-1 trading plan adopted by the reporting person"
A Rule 10b5-1 trading plan is a pre-arranged schedule that allows company insiders to buy or sell stock at specific times, even if they have inside information. It helps prevent accusations of unfair trading by making these transactions look planned and transparent, rather than sneaky or illegal.
weighted average price financial
"The price reported in Column 4 is a weighted average price. These shares were sold in multiple transactions"
Weighted average price is the average price of a security where each trade or component is counted according to its size, so bigger trades pull the average more than smaller ones. Think of it like calculating the average cost of a grocery haul where items you bought more of have greater influence on the final per-item cost. Investors use it to understand the true average price paid or received, judge execution quality, and compare trading performance against market movement.
stock option financial
"The stock option vested and was fully exercisable."
A stock option is a contract that gives you the right to buy or sell a company's stock at a specific price within a certain time frame. People use them to potentially make money if the stock's price moves favorably or to protect against losses. It's like holding a coupon that can be used to buy or sell stock at a set price later on.
open-market sale financial
"transaction_action": "open-market sale""
An open-market sale is when a shareholder sells existing shares directly on a public exchange to any willing buyer, rather than through a private deal. Think of it like putting goods on a busy market stall where price is set by supply and demand; for investors it matters because such sales increase available supply, can put short-term downward pressure on the stock price, and signal changes in liquidity or investor confidence.
FAQ
What insider transactions did ADTRAN (ADTN) report for CTO Christoph Glingener?
ADTRAN reported that CTO Christoph Glingener exercised stock options and sold 148,392 common shares. The sales occurred in open-market transactions on May 7 and 8, 2026, immediately after exercising options, and were conducted under a pre-arranged Rule 10b5-1 trading plan.
What option exercise prices were involved in the ADTRAN (ADTN) CTO’s Form 4 filing?
The CTO exercised stock options to acquire 148,392 ADTRAN shares at exercise prices of $7.01 and $12.17 per share. These options were then followed by open-market sales of the same number of shares, effectively converting the option positions into cash equity transactions.
Were the ADTRAN (ADTN) CTO’s trades made under a Rule 10b5-1 plan?
Yes. The filing states the transactions were effectuated pursuant to a Rule 10b5-1 trading plan adopted on December 12, 2025. Such plans pre-schedule trades, indicating these sales were arranged in advance rather than timed in response to short-term market developments.
What is the remaining option position for the ADTRAN (ADTN) CTO after these trades?
After exercising certain options, the CTO continues to hold a stock option position with an exercise price of $19.08 per share covering 85,383 underlying common shares. This option expires on May 14, 2029, and represents ongoing potential ownership if exercised in the future.
AI-generated analysis. How Rhea-AI works. Not financial advice.
