Who
Charles E. Davidson
10% owner
Company insider
Files Form 4 as: Director and 10% owner, Mammoth Energy Services; Director and 10% owner, Nephros; 10% owner, Rhino Resource Partners LP; 10% owner and Other, Diamondback Energy; 10% owner, Rlj Entertainment; 10% owner and Other, Epl Oil & Gas; 10% owner, Gulfport Energy; 10% owner, Bronco Drilling Company.
In numbers
- Trades disclosed
- 134
- Buys
- 3
- Sells
- 101
- Bought
- $17.5M
- Sold
- $1.0B
- Companies
- 9
- Companies where not an officer
- 9
- First trade
- 3 Jan 2006
- Last trade
- 17 Jun 2026
- Last filed
- 22 Jun 2026
Companies traded
Activity over time
1 Nov 2024 – 1 Oct 2026
Buys above the line, sells below, each month.
Every trade
| Traded | Company | What | Amount | |
|---|---|---|---|---|
| 17 Jun 2026filed 22 Jun 2026 | TUSK Mammoth Energy ServicesOilfield services | SEC FORM 4 Code J | —2,403,831 at $0.00 | filing |
| 17 Jun 2026filed 22 Jun 2026 | TUSK Mammoth Energy ServicesOilfield services | SEC FORM 4 Code J | —4,066,610 at $0.00 | filing |
| 12 Mar 2024filed 14 Mar 2024 | TUSK Mammoth Energy ServicesOilfield services | SEC FORM 4 Code J | —535,366 at $0.00 | filing |
| 6 Jan 2021filed 8 Jan 2021 | NEPH NephrosMedical Devices | SEC FORM 4 Code A | —3,196 at $0.00 | filing |
| 15 Oct 2020filed 16 Oct 2020 | NEPH NephrosMedical Devices | SEC FORM 4 Code A | $1.0M166,667 at $6.00 | filing |
| 21 Jan 2016filed 25 Jan 2016 | Rhino Resource Partners LP | SEC FORM 4 Sold | $83K159,216 at $0.52 | filing |
| 21 Jan 2016filed 25 Jan 2016 | Rhino Resource Partners LP | SEC FORM 4 Sold | $3.1M6,010,265 at $0.52 | filing |
| 21 Jan 2016filed 25 Jan 2016 | Rhino Resource Partners LP | SEC FORM 4 Sold | $312K599,631 at $0.52 | filing |
| 18 Nov 2015filed 19 Nov 2015 | FANG Diamondback EnergyOil & Gas E&P | SEC FORM 4 Sold | $786K9,736 at $80.71 | filing |
| 17 Nov 2015filed 19 Nov 2015 | FANG Diamondback EnergyOil & Gas E&P | SEC FORM 4 Sold | $1.2M15,013 at $79.60 | filing |
| 5 Oct 2015filed 7 Oct 2015 | Rhino Resource Partners LP | SEC FORM 4 Code A | —121,952 | filing |
| 3 Sep 2015filed 4 Sep 2015 | FANG Diamondback EnergyOil & Gas E&P | SEC FORM 4 Sold | $4.8M70,000 at $68.42 | filing |
| 2 Sep 2015filed 4 Sep 2015 | FANG Diamondback EnergyOil & Gas E&P | SEC FORM 4 Sold | $3.4M50,000 at $67.23 | filing |
| 31 Aug 2015filed 1 Sep 2015 | FANG Diamondback EnergyOil & Gas E&P | SEC FORM 4 Sold | $16.4M240,000 at $68.45 | filing |
| 28 Aug 2015filed 1 Sep 2015 | FANG Diamondback EnergyOil & Gas E&P | SEC FORM 4 Sold | $89K1,315 at $67.54 | filing |
| 18 Jun 2015filed 22 Jun 2015 | FANG Diamondback EnergyOil & Gas E&P | SEC FORM 4 Sold | $1.5M18,299 at $80.53 | filing |
| 19 Mar 2015filed 19 Mar 2015 | FANG Diamondback EnergyOil & Gas E&P | SEC FORM 4 Sold | $1.7M24,040 at $71.81 | filing |
| 18 Mar 2015filed 19 Mar 2015 | FANG Diamondback EnergyOil & Gas E&P | SEC FORM 4 Sold | $14.7M203,136 at $72.14 | filing |
| 17 Mar 2015filed 19 Mar 2015 | FANG Diamondback EnergyOil & Gas E&P | SEC FORM 4 Sold | $317K4,455 at $71.25 | filing |
| 3 Feb 2015filed 3 Feb 2015 | FANG Diamondback EnergyOil & Gas E&P | SEC FORM 4 Sold | $3.4M47,493 at $72.14 | filing |
News
Diamondback Energy Honor & Serve Luncheon Luncheon Permian Basin first responders First responder first responder appreciation event celebrationFANG · firstalert7.com · 23 Oct 2026Here Are Thursday's Top Wall Street Analyst Research Calls: AngloGold Ashanti, Bank of America, Cirrus Logic, Crocs, Diamondback Energy, Devon Energy, Netflix, PayPal, Spotify Technolgy , and MoreFANG · aol.com · 15 Oct 2026Historic Diamondback Energy pump jack finds new home at Permian Basin Petroleum MuseumFANG · firstalert7.com · 13 Oct 2026Reviewing Nephros (NASDAQ:NEPH) and MariMed (OTCMKTS:MRMD)NEPH · dailypolitical.com · 10 Oct 2026
0 headlines in the last 90 days name Charles E. Davidson; 4 articles from the last 14 days about the 3 companies they traded most, at most three about any one of them.