Insider profile
Walther Donald E.
This page tracks every SEC Form 4 filing since April 2023 by Walther Donald E., Chief Legal Officer: 42 transactions in total, including 2 open-market purchases and 0 sales. Each record is parsed directly from the original filing, with amendments reconciled so a corrected filing never double-counts.
Activity summary
Recent insider activity is bullish. Over the last 30 days, 2 insiders purchased shares versus 1 sale. Buying was led by Walther Donald E..
Three year balance
Buy and sell value by quarter, Q2 23 to Q3 26. Walther Donald E. has been a net seller across the period shown.
Bars below the rule are sales, above are purchases. Largest quarter on the chart is $60K.
Track record
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Transaction History
Sourced from SEC EDGAR Form 4 filings. Updated hourly.
| Date | Insider | Company | Type | Shares | Price | Value |
|---|---|---|---|---|---|---|
| Aug 11, 2026 | Walther Donald E. | CMTL | Option Exercise | 5,883 | — | — |
| Aug 11, 2026 | Walther Donald E. | CMTL | Tax Withholding | 2,010 | $1.73 | $3K |
| Aug 11, 2026 | Walther Donald E. | CMTL | Option Exercise | 5,883 | — | — |
| Apr 28, 2026 | Walther Donald E. | CMTL | Tax Withholding | 576 | $3.52 | $2K |
| Apr 28, 2026 | Walther Donald E. | CMTL | Tax Withholding | 9,899 | $3.52 | $35K |
37 more transactions hidden
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Reading an insider's Form 4 history
Corporate insiders — directors, officers, and holders of more than 10% of a company's stock — must report their trades to the SEC on Form 4 within two business days. Looking at one insider's filings over time shows whether they tend to buy on the open market (a discretionary use of their own money, generally the strongest signal), sell, or simply receive and exercise equity awards as compensation.
The track record above measures how this insider's past open-market purchases performed in the months after each filing. Trades made under a pre-scheduled Rule 10b5-1 plan are flagged because they carry no timing signal. To pull any insider's full history programmatically, see the insider trading API or our guide to reading Form 4 filings.