CIK 0001101680
DZSI DZS INC.
Insider trading from SEC Form 4. Last filing Dec 17, 2025.
DZS INC. (DZSI) has 10 SEC Form 4 filings on file from 8 insiders, the latest filed on Dec 17, 2025. No insider bought or sold on the open market in the last 90 days; rows filed in that time are grants, exercises, tax withholding and other transactions that carry no view on the price.
4 open-market trades have been scored at DZSI. The newest: Dasan Networks, Inc (10% owner) sold $909 of stock on Dec 4, 2025, filed Dec 17, 2025, scored 32 (weak). The largest of the 4 shown: Charles D Vogt (President & CEO) bought $8,500 on Dec 10, 2024, scored 33 (weak). 2 insiders bought within 14 days of each other around Dec 10, 2024.
Last 90 days
Signals
Open-market buys and sells at DZS INC., scored.
| Score | Insider | Value | Holdings | Price context | Filed |
|---|---|---|---|---|---|
| 32Weak | Dasan Networks, Inc owner sell | $909 9,093,015 shares | -100% | - | |
| 33Weak | Charles D Vogt President & CEO buy | $8,500 10,000 shares | +2% | - | |
| 31Weak | Matthew W Bross director buy | $7,722 9,000 shares | +10% | - | |
| 23Weak | Matthew W Bross director buy | $875 1,000 shares | +1% | - |
Transactions
Every row filed, 16 in all.
| Date | Insider | Transaction | Shares | Price | Value | Holdings after | Filed |
|---|---|---|---|---|---|---|---|
| Dec 4, 2025 | Dasan Networks, Inc owner | SOpen-market sale Common Stock | -9,093,015 | $0.00 | $909 | 0 | Dec 17, 2025 |
| Dec 31, 2024 | Matthew W Bross director | MOption exercise Common Stock | +25,000 | - | - | 127,065 | Jan 2, 2025 |
| Dec 31, 2024 | Barbara Carbone director | MOption exercise Common Stock | +25,000 | - | - | 117,065 | Jan 2, 2025 |
| Dec 31, 2024 | Woong Ji Choi director | MOption exercise Common Stock | +25,000 | - | - | 100,000 | Jan 2, 2025 |
| Dec 31, 2024 | Todd Jackson director | MOption exercise Common Stock | +25,000 | - | - | 100,000 | Jan 2, 2025 |
| Dec 31, 2024 | Choon Yul Yoo director | MOption exercise Common Stock | +25,000 | - | - | 126,925 | Jan 2, 2025 |
| Dec 31, 2024 | Joon Kyung Kim director | MOption exercise Common Stock | +25,000 | - | - | 124,246 | Jan 2, 2025 |
| Dec 31, 2024 | Matthew W Bross director | MOption exercise Restricted Stock Unitsderivative | -25,000 | - | - | 0 | Jan 2, 2025 |
| Dec 31, 2024 | Barbara Carbone director | MOption exercise Restricted Stock Unitsderivative | -25,000 | - | - | 0 | Jan 2, 2025 |
| Dec 31, 2024 | Woong Ji Choi director | MOption exercise Restricted Stock Unitsderivative | -25,000 | - | - | 0 | Jan 2, 2025 |
| Dec 31, 2024 | Todd Jackson director | MOption exercise Restricted Stock Unitsderivative | -25,000 | - | - | 0 | Jan 2, 2025 |
| Dec 31, 2024 | Choon Yul Yoo director | MOption exercise Restricted Stock Unitsderivative | -25,000 | - | - | 0 | Jan 2, 2025 |
| Dec 31, 2024 | Joon Kyung Kim director | MOption exercise Restricted Stock Unitsderivative | -25,000 | - | - | 0 | Jan 2, 2025 |
| Dec 10, 2024 | Charles D Vogt President & CEO | POpen-market purchase Common Stock | +10,000 | $0.85 | $8,500 | 419,946 | Dec 11, 2024 |
| Dec 6, 2024 | Matthew W Bross director | POpen-market purchase Common Stock | +9,000 | $0.86 | $7,722 | 102,065 | Dec 9, 2024 |
| Dec 4, 2024 | Matthew W Bross director | POpen-market purchase Common Stock | +1,000 | $0.88 | $875 | 93,065 | Dec 6, 2024 |
Insiders
Everyone who has filed a Form 4 here.
- Matthew W Brossdirector
- Barbara Carbonedirector
- Woong Ji Choidirector
- Dasan Networks, Incowner
- Todd Jacksondirector
- Joon Kyung Kimdirector
- Charles D VogtPresident & CEO
- Choon Yul Yoodirector
Questions about DZSI
Answered from the filings on this page, as of the latest one.
Are insiders buying DZSI?
No. In the last 90 days no insider at DZS INC. bought or sold shares on the open market according to SEC Form 4 filings. The rows on file from that period are grants, exercises, tax withholding or other transactions, which carry no view on the price.
Who was the last insider to trade DZSI on the open market?
Dasan Networks, Inc (10% owner) sold $909 of DZSI on Dec 4, 2025 and filed the Form 4 on Dec 17, 2025. InsiderTell scored 32 (weak).
How many insiders file Form 4 at DZS INC.?
8 people have filed a Form 4 at DZS INC., among them Matthew W Bross (director), Barbara Carbone (director), Woong Ji Choi (director). Officers, directors and holders of more than 10% of a share class must report their trades within two business days.
Not investment advice. Scores and forward returns are decision support built from public SEC filings and past prices; they describe what happened after comparable filings, not what will happen after this one. Do your own research and size your risk.