Mark Lawrence Plaumann
CIK 1290795 · last filed 2026-09-17
Mark Lawrence Plaumann is a corporate insider who has filed 47 SEC Form 4 insider transactions across 5 companies since 2007. The most recent filing shows the insider bought $15.0K of TUSK on Sep 17, 2026. Across all open-market trades the lifetime net is −$1.0M, making them a net seller over the disclosed history. Current disclosed insider exposure totals $4.5M across reported positions. 26 SEC filings were submitted jointly with Diamondback Energy, Inc.
"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.
FANG 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
1ST FLOOR
GREENWICH, CT 06831
Holdings By Company
| Symbol | Role | Shares | Price | Disclosed Exposure | Lifetime OM Net | Filings | Latest Filed |
|---|---|---|---|---|---|---|---|
| TUSK | Director | 5,000 | $2.71 | $13.5K | $15.0K | 1 | 2026-09-17 |
| FANG | Director | 20,125 | $203.95 | $4.10M | -$1.06M | 22 | 2026-08-24 |
| RJET | Director | 21,960 | $16.04 | $352.2K | $0 | 9 | 2015-11-17 |
| Rhino Resource Partners LP (RNO) Delisted | Director | 39,040 | — | — | $0 | 8 | 2015-10-07 |
| ICX TECHNOLOGIES INC (ICXT) Delisted | Director | — | — | — | $0 | 3 | 2009-10-27 |
Recent Filings
47 filings| Filed | Symbol | Action | Net Shares | Net $ | Link |
|---|---|---|---|---|---|
| 2026-09-17 | TUSK | Buy (P) | +5,000 | $15.0K | EDGAR |
| 2026-08-24 | FANG | Sell (S) | −1,000 | -$210.6K | EDGAR |
| 2026-08-21 | FANG | Notice (144) | −1,000 | -$210.6K | EDGAR |
| 2026-06-10 | FANG | Sell (S) | −500 | -$98.2K | EDGAR |
| 2026-06-09 | FANG | Notice (144) | −500 | -$98.2K | EDGAR |
| 2026-05-21 | FANG | Grant (A) | +982 | $0 | EDGAR |
| 2025-06-23 | FANG | Other (J) | +2,965 | $0 | EDGAR |
| 2025-05-22 | FANG | Grant (A) | +1,417 | $0 | EDGAR |
| 2024-12-09 | FANG | Gift (G) | −100 | $0 | EDGAR |
| 2024-11-14 | FANG | Mixed | −9,562 | -$251.6K | 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.