Marc Gabelli
CIK 1233348 · Co-Chief Executive Officer · last filed 2026-07-28
"Disclosed insider exposure" sums this person's most-recently-reported share counts across each company they're an insider in, multiplied by the current underlying price. It is not net worth — it misses retail holdings, private investments, real estate, index funds, and any company where the person isn't an SEC-reporting insider. For informational purposes only.
Charts
Trading activity, where the exposure sits, and each trade against the stock price.
MPTI price and trades
Daily close with each Form 4 filing on this company marked: green = open-market buy, red = open-market sale, purple = grants, exercises, gifts and other non-market transactions. Marker size scales with the dollar value.
Shares held
Shares owned after each reported transaction on this company (direct holdings as reported).
Open-market buying and selling
by monthDollar value of open-market purchases (code P, up) and sales (code S, down) across all companies, by filing month. Grants, exercises and gifts are excluded.
Exposure by company
latestMost recently reported shares × current price. Faded bars (*) have had no filing in 3 years, so the person may no longer hold them. Click a bar to chart that company.
Filer Profile
RYE, NY 10580
Holdings By Company
| Symbol | Role | Shares | Price | Disclosed Exposure | Lifetime OM Net | Filings | Latest Filed |
|---|---|---|---|---|---|---|---|
| LGL | Co-Chief Executive Officer | 4,387,727 | $6.63 | $29.09M | $69.7K | 31 | 2026-07-28 |
| MPTI | Director | 114,161 | $67.66 | $7.72M | -$13.02M | 9 | 2026-04-28 |
| Associated Capital Group, Inc. (AC) Delisted | Director | 20,766 | $30.92 | $642.1K | $0 | 4 | 2024-08-13 |
| IronNet, Inc. (IRNT.WS) Delisted | 566,000 | $0.01 | $4.0K | $0 | 1 | 2021-08-30 | |
| GAMCO INVESTORS, INC. ET AL (GBL) Delisted | Director | 20,766 | $14.78 | $306.9K | $0 | 3 | 2015-08-27 |
Recent Filings · Page 2 of 5
48 filings| Filed | Symbol | Action | Net Shares | Net $ | Link |
|---|---|---|---|---|---|
| 2024-01-04 | MPTI | Sell (S) | −88,402 | -$3.48M | EDGAR |
| 2023-12-12 | LGL | Grant (A) | +2,874 | $0 | EDGAR |
| 2023-12-05 | MPTI | Sell (S) | −185,240 | -$6.52M | EDGAR |
| 2023-11-28 | MPTI | Gift (G) | −313,830 | $0 | EDGAR |
| 2023-05-15 | MPTI | Grant (A) | +1,266 | $15.0K | EDGAR |
| 2023-03-13 | Associated Capital Group, Inc. (AC) Delisted | Other (J) | — | $0 | EDGAR |
| 2023-03-09 | Associated Capital Group, Inc. (AC) Delisted | Gift (G) | — | $0 | EDGAR |
| 2021-12-29 | LGL | Grant (A) | +1,267 | $0 | EDGAR |
| 2021-08-30 | IronNet, Inc. (IRNT.WS) Delisted | Mixed | +3,670,375 | $5.66M | EDGAR |
| 2020-12-31 | LGL | Grant (A) | +16,345 | $0 | EDGAR |
Notice (144 / 144/A): Form 144 is a notice of intent to sell restricted/control stock under Rule 144, filed before the sale; 144/A is an amendment. Many notices are pre-scheduled under Rule 10b5-1 plans. A Form 4 with code S typically follows within a few days when the planned sale executes; missing follow-up Form 4s suggest the notice was cancelled or modified.